A method for manufacturing a ceramic-glass composite high mechanical strength suspension insulator

Abstract

The application discloses a kind of ceramic-glass composite high mechanical strength suspension insulator preparation methods, it is related to ceramic material and glass ceramic composite material field.The dense composite material body is prepared by preparing alumina-based ceramic powder and low-melting point glass powder, auxiliary materials and the like raw materials according to mass fraction, ball milling, forming, drying and subsection sintering process.Glass phase plays the role of interface wetting and densification in the sintering process, improves the mechanical strength and thermal shock resistance of the composite, and also takes into account high dielectric strength.The insulator prepared by the application has excellent mechanical and electrical properties, and is suitable for high-voltage transmission line insulating support elements.The method is stable and easy to industrialize.

Description

Technical Field

[0001] This invention relates to the field of ceramic materials and glass-ceramic composite materials, and in particular to a method for preparing a ceramic-glass composite suspension insulator with high mechanical strength. Background Technology

[0002] High-voltage suspension insulators are crucial components in overhead transmission lines, supporting conductors and providing electrical insulation. Their performance directly affects the safety and stability of the line. Traditional insulators are mainly made of inorganic materials such as ceramics or glass. During operation, they withstand both electric field forces and mechanical loads. Especially in high-voltage, ultra-high-voltage, and even extra-high-voltage transmission systems, higher requirements are placed on mechanical strength, insulation strength, thermal shock resistance, and environmental aging resistance.

[0003] Ceramic insulators were widely used in early power transmission systems due to their mature molding process and high dielectric strength. However, the material itself is brittle and prone to cracking or spalling under mechanical and thermal shock, limiting their reliability under extreme conditions. Glass insulators, on the other hand, are widely used in overhead lines ranging from 10 kV to 1000 kV due to their smooth surface and excellent resistance to flashover. However, pure glass materials still suffer from insufficient strength and toughness, especially under heavy mechanical loads and temperature cycling conditions, exhibiting a significant risk of failure.

[0004] To address the shortcomings in the mechanical properties of traditional ceramic and glass insulating materials, existing patents and technological research have proposed various improvement solutions. For example, US20100003415A1 discloses a method for preparing ceramic and glass insulators with an anti-pollution flashover film, which mainly improves surface properties and enhances anti-pollution flashover capability by forming a nano-inorganic oxide film on the surface of a ceramic or glass substrate. However, it does not fundamentally solve the problem of the mechanical strength of the substrate material.

[0005] Furthermore, in the field of ceramic composites, the use of glass phases as low-melting-point phases to aid sintering and improve density has a long history of research. For example, EP0539151 discloses a composite dielectric material comprising glass and ceramic materials, wherein a glass phase with a low softening temperature is designed to improve the density and interfacial bonding properties of the ceramic matrix during sintering. Although this technology originates from electronic dielectric materials, it demonstrates the fundamental principle that glass-ceramic multiphase materials can improve the overall performance of materials, providing a theoretical reference for the composite design of insulator materials.

[0006] The domestically published patent CN109912297A for the preparation of composite ceramic insulators provides a preparation process for composite ceramic insulators. Although its raw material system is complex, it demonstrates that the mechanical properties and morphological consistency of ceramic insulators can be improved through the multiphase ratio of raw materials and process control, providing a specific process reference for technological improvement in this field.

[0007] The market demand for composite insulators has been growing steadily in recent years. Traditional ceramic and glass insulation products, due to their respective performance limitations, are gradually failing to meet the demands of advanced power grid development in areas such as high-end transmission line maintenance and reliability under extreme weather conditions. Therefore, developing new insulating materials and manufacturing processes with high mechanical strength, high reliability, and excellent insulation properties has become a key technological challenge. Existing technologies have not fully utilized the synergistic effect of ceramics and low-melting-point glass materials to systematically improve the overall mechanical properties, interfacial bonding quality, and comprehensive electrical performance of insulators. This creates a technological space for the composite high-mechanical-strength suspension insulator manufacturing method proposed in this invention. Summary of the Invention

[0008] Based on the problems raised in the background art, the present invention proposes a method for preparing a ceramic-glass composite suspension insulator with high mechanical strength.

[0009] The technical solution is as follows: A method for preparing a ceramic-glass composite suspension insulator with high mechanical strength includes the following steps: 1) Prepare the raw material components according to the mass percentages: 60-90 parts of α-Al₂O₃ powder; 0-10 parts of ZrO2 powder; 10-40 parts of silicate low-melting-point glass powder; Dispersant 0.1-2 parts; 0.1-2 parts of wetting agent; 1-5 parts organic binder; 2) Add the above components to a ball mill jar and mix with an organic solvent. Then, use ball milling media to perform ball milling treatment for 6-24 hours at a speed of 100-250 rpm. 3) Remove the solvent from the ball-milled slurry, dry it, and pulverize it to obtain a compressible powder; 4) The compressible powder is loaded into the mold and formed by uniaxial pressing or isostatic pressing, and pressure is applied to obtain the formed blank; 5) Pre-fire or dry the formed blank for 12-48 hours to reduce the moisture content of the blank to ≤0.5%; 6) Load the dried blanks into the sintering furnace for pre-sintering and formal sintering. After sintering, slowly cool them to room temperature. 7) The sintered body is subjected to stress-relief annealing at a temperature of 700-850℃ for 0.5-2 hours, and then the final product is obtained by machining or surface polishing.

[0010] Furthermore, the silicate low-melting-point glass powder is selected from borosilicate glass or B2O3-SiO2-based glass powder.

[0011] Furthermore, the organic binder is selected from polyvinyl alcohol, polyvinylpyrrolidone, lignin, or mixtures thereof.

[0012] Furthermore, the dispersant is prepared by: Add 33-42 parts of stearamide, 7-13 parts of hexamethylenediamine, 0.8-2.3 parts of zinc 2-methacrylate (CAS: 14643-87-9), 5-10 parts of hexafluorobutyl acrylate, 250-400 parts of DMF, and 0.25-0.6 parts of zirconium aminophthalate MOF (CAS: 1260119-00-3) to a reaction vessel, stir and mix evenly, control the reaction temperature at 60-70℃, and react at a constant temperature for 40-80 minutes; after the reaction is completed, remove the DMF from the system by vacuum distillation, dry, and obtain a powdered high-efficiency dispersant for insulators.

[0013] Furthermore, the organic solvent is ethanol, isopropanol, water, or a mixture thereof.

[0014] Furthermore, the milling media are made of zirconia beads or alumina beads.

[0015] Furthermore, the pressure applied to the molded blank is 120-250 MPa.

[0016] Furthermore, the pre-sintering process involves heating from room temperature to 600-850℃ at a rate of 3-15℃ / min and holding at that temperature for 1-3 hours.

[0017] Furthermore, the formal sintering process involves heating from the pre-sintering temperature to 1200-1400℃ at a rate of 3-15℃ / min and holding at that temperature for 2-6 hours.

[0018] Furthermore, the slow cooling to room temperature rate is 2-10°C / min.

[0019] Dispersant reaction mechanism: During the preparation of the dispersant, the amino group of stearamide undergoes an amino addition reaction with zinc 2-methacrylate and hexafluorobutyl acrylate, and at the same time forms a synergistic composite system with zirconium aminophthalate MOF. After the dispersant is added to the raw materials, it can optimize the dispersion uniformity of ceramic powder and low melting point glass powder. During the sintering process, the glass phase plays an interfacial wetting and densification role, forming a firm bond with the ceramic matrix, and synergistically improving the overall structural stability and comprehensive performance of the material.

[0020] Dispersant effect: Specialized dispersants constructed by amino addition reactions effectively reduce raw material agglomeration, strengthen the interfacial bonding between ceramic and glass phases, and improve the mechanical properties and structural integrity of materials.

[0021] The combination of a dispersion system and a segmented sintering process reduces defects during sintering and enhances the material's resistance to thermal shock and its environmental adaptability.

[0022] The synergistic effect of the ceramic-glass composite system and functionalized dispersants not only retains excellent dielectric properties but also optimizes insulation performance parameters, meeting the stringent requirements of high-voltage transmission lines.

[0023] Compared with the prior art, the present invention has the following advantages: 1. Good bonding between the ceramic matrix and glass improves overall density and flexural strength; 2. Lowering the sintering temperature reduces sintering defects and improves dimensional stability; 3. Excellent dielectric properties meet high-voltage insulation requirements; 4. Enhanced resistance to thermal shock and environmental aging. Detailed Implementation

[0024] The features of the present invention are further illustrated below through embodiments, but the scope of protection of this patent is not limited to the embodiments. Example 1

[0025] A method for preparing a ceramic-glass composite suspension insulator with high mechanical strength includes the following steps: 1) Raw material composition: Accurately weigh each raw material component by mass, with the following specific amounts: 60 kg of α-Al₂O₃ powder (purity ≥99.8%, average particle size D50=1.0 μm, α phase content ≥99%); 0 kg of ZrO₂ powder (not added); 10 kg of silicate low-melting-point glass powder (borosilicate glass powder, composition: 65wt% SiO₂, 20wt% B₂O₃, 10wt% Na₂O, 5wt% CaO, average particle size D50=2.0 μm); 0.1 kg of dispersant; 0.1 kg of wetting agent (polyethylene glycol 400, purity ≥99.0%); 1 kg of organic binder (polyvinyl alcohol, degree of polymerization 1700, degree of alcoholysis 88%). Place the above-weighed solid raw materials (except for liquid additives) into a three-dimensional mixer (model SYH-50, speed 150 r / min) and premix for 20 minutes to obtain a preliminary mixed raw material.

[0026] The dispersant is prepared by weighing 33 kg of stearamide (purity ≥ 98.5%), 7 kg of hexamethylenediamine (purity ≥ 99.0%), 0.8 kg of zinc 2-methacrylate (CAS: 14643-87-9, purity ≥ 98.0%), 5 kg of hexafluorobutyl acrylate (purity ≥ 98.5%), and 250 kg of... DMF (N,N-dimethylformamide, purity ≥99.5%) and 0.25 kg of zirconium aminophthalate MOF (CAS: 1260119-00-3, particle size 50-100 nm) were added to a 500 L three-necked reactor. The stirrer was turned on (100 r / min), and after stirring and mixing evenly, the temperature was raised to 60 °C and the reaction was maintained at a constant temperature for 40 minutes. After the reaction was completed, the reaction solution was transferred to a vacuum distillation column and distilled under vacuum of -0.08 MPa and 80 °C for 2 hours to remove DMF from the system. The distillation residue was placed in a vacuum drying oven (60 °C, -0.09 MPa) and dried for 4 hours. After drying, it was crushed and passed through a 200 mesh sieve to obtain a powdered dispersant, which was then sealed for later use.

[0027] 2) Ball milling treatment: The pre-mixed raw materials were transferred into a planetary ball mill (model QM-6SP4, ball mill jar volume 10L), and the ball milling media (zirconia beads, ball diameter 8mm, media to powder weight ratio 6:1) were added. Then, 80kg of ethanol (purity ≥99.7%) was added as the ball milling solvent. The ball mill speed was set to 100rpm and the ball milling time was 6 hours. During the ball milling process, the machine was stopped every 2 hours to observe the slurry state to ensure that there was no clumping. After the ball milling was completed, a uniform and fine mixed slurry was obtained (slurry viscosity 2000mPa·s, 25℃).

[0028] 3) Solvent Removal and Powdering: The ball-milled slurry was transferred to a vacuum distillation mill (model RE-52AA) to remove the ethanol solvent under a vacuum of -0.07 MPa and a temperature of 50°C, resulting in a viscous material. The viscous material was then placed in a vacuum drying oven (60°C, -0.09 MPa) and dried for 6 hours until constant weight was achieved. After drying, the material was transferred to a high-speed pulverizer (model FS-100, speed 12000 r / min) for pulverization and passed through an 180-mesh sieve to obtain a free-flowing, compressible powder (loose packing density 1.2 g / cm³). 3 ).

[0029] 4) Molding process: The compressible powder is evenly loaded into a special mold for insulators (size Φ120mm×350mm) and placed into a hydraulic press (model Y32-100); the pressure is set to 120MPa and the holding time is 3 minutes to obtain the molded blank; after molding, the blank is removed and the appearance is observed to be free of defects such as cracks, missing material, and delamination, and the density of the blank is ≥65%.

[0030] 5) Pre-firing / drying treatment: Place the shaped blank into a box-type drying oven (model SX-800) and use the drying method; set the temperature to 80℃ and dry at a constant temperature for 12 hours; after drying, take a sample to test the moisture content of the blank. The moisture content was measured by a Karl Fischer moisture analyzer and was 0.3% (≤0.5%), which meets the requirements.

[0031] 6) Sintering treatment: The dried blanks are loaded into an atmosphere sintering furnace (model SL-1400), and air atmosphere (flow rate 0.5 m³ / h) is introduced into the furnace. 3 / h); pre-sintering and formal sintering are carried out according to the procedure: the pre-sintering process is to raise the temperature from room temperature to 600℃ at 3℃ / min, and hold it at the temperature for 1 hour after reaching the temperature; after the pre-sintering is completed, continue to raise the temperature at 3℃ / min to the formal sintering temperature of 1200℃, and hold it at the temperature for 2 hours after reaching the temperature; after sintering is completed, control the cooling rate to 2℃ / min and slowly cool it to room temperature to obtain the sintered body.

[0032] 7) Stress-relief annealing and post-processing: The sintered body is transferred to an annealing furnace (model HTF-1000), the annealing temperature is set to 700℃, the heating rate is 5℃ / min, and the temperature is held for 0.5 hours after reaching the set temperature to complete the stress-relief annealing treatment; after annealing, it is cooled to room temperature and the sintered body is removed; the sintered body is machined using a CNC lathe (model CK6150) to remove excess edges and corners, and then polished by a surface grinder (model M7130) (surface roughness Ra≤0.8μm). Finally, deburring and cleaning are performed to obtain the final ceramic-glass composite high mechanical strength suspension insulator. Example 2

[0033] A method for preparing a ceramic-glass composite suspension insulator with high mechanical strength includes the following steps: 1) Raw material composition: Accurately weigh each raw material component by mass, and the specific amounts are as follows: α-Al2O3 powder 70kg (purity ≥99.8%, average particle size D50=1.5μm, α phase content ≥99%); ZrO2 powder 2.5kg (3mol% Y2O3 stabilized ZrO2, purity ≥99.5%, average particle size D50=0.8μm); silicate low melting point glass powder 20kg (B2O3-SiO2 system glass powder, composition: 70wt% SiO2, 25wt% B2O3, 5wt% Li2O, average particle size D50=2.5μm); dispersant 0.8kg; wetting agent 0.8kg (polypropylene glycol 400, purity ≥99.0%); organic binder 2.5kg (polyvinylpyrrolidone, molecular weight 40000, purity ≥99.0%). The weighed solid raw materials (excluding liquid additives) were placed into a three-dimensional mixer (model SYH-50, speed 160r / min) and premixed for 25 minutes to obtain preliminary mixed raw materials.

[0034] The dispersant is prepared by weighing 36 kg of stearamide (purity ≥ 98.5%), 9 kg of hexamethylenediamine (purity ≥ 99.0%), 1.4 kg of zinc 2-methacrylate (CAS: 14643-87-9, purity ≥ 98.0%), 7 kg of hexafluorobutyl acrylate (purity ≥ 98.5%), and 300 kg of... DMF (purity ≥99.5%) and 0.4 kg of zirconium aminophthalate MOF (CAS: 1260119-00-3, particle size 50-100 nm) were added to a 500 L three-necked reactor. The stirrer was turned on (speed 120 r / min), and after stirring and mixing evenly, the temperature was raised to 64 °C and the reaction was maintained at a constant temperature for 55 minutes. After the reaction was completed, the reaction solution was transferred to a vacuum distillation column and distilled under vacuum conditions of -0.085 MPa and 85 °C for 2.5 hours to remove DMF from the system. The distillation residue was placed in a vacuum drying oven (65 °C, -0.09 MPa) and dried for 4.5 hours. After being removed, it was crushed and passed through a 200 mesh sieve to obtain a powdered dispersant, which was then sealed for later use.

[0035] 2) Ball milling treatment: Transfer the initially mixed raw materials into a planetary ball mill (model QM-6SP4, ball milling jar volume 10L), add ball milling media (alumina beads, ball diameter 8mm, media to powder weight ratio 6:1), and add 90kg isopropanol (purity ≥99.7%) as the ball milling solvent; set the ball mill speed to 150rpm and the ball milling time to 12 hours; during the ball milling process, stop the machine every 2 hours to observe the slurry state to ensure that there is no clumping. After the ball milling is completed, a uniform and fine mixed slurry is obtained (slurry viscosity 2500mPa·s, 25℃).

[0036] 3) Solvent Removal and Powdering: The ball-milled slurry was transferred to a vacuum distillation mill (model RE-52AA) to remove isopropanol solvent under a vacuum of -0.075 MPa and a temperature of 55°C, resulting in a viscous material. The viscous material was then placed in a vacuum drying oven (65°C, -0.09 MPa) and dried for 7 hours until constant weight was achieved. After drying, the material was transferred to a high-speed pulverizer (model FS-100, speed 12000 r / min) for pulverization and passed through an 180-mesh sieve to obtain a free-flowing, compressible powder (bulk density 1.3 g / cm³). 3 ).

[0037] 4) Molding process: The compressible powder is evenly loaded into a rubber mold (size Φ120mm×350mm) and placed in a cold isostatic press (model YLB-630); the pressure is set to 160MPa and the holding time is 4 minutes to obtain the molded blank; after molding, the blank is removed and the appearance is observed to be free of defects such as cracks, missing material, and delamination, and the density of the blank is ≥68%.

[0038] 5) Pre-firing / drying treatment: The formed blank is placed in a box-type sintering furnace (model SX-800) and pre-firing is carried out; the temperature is set at 120℃ and pre-firing is carried out at a constant temperature for 24 hours; after the pre-firing is completed, the moisture content of the blank is sampled and tested. The moisture content is 0.25% (≤0.5%) by Karl Fischer moisture analyzer, which meets the requirements.

[0039] 6) Sintering treatment: The dried blanks are loaded into an atmosphere sintering furnace (model SL-1400), and air atmosphere (flow rate 0.8 m³ / h) is introduced into the furnace. 3 / h); pre-sintering and formal sintering are carried out according to the procedure: the pre-sintering process is to heat from room temperature to 700℃ at 7℃ / min, and hold at the temperature for 2 hours after reaching the temperature; after the pre-sintering is completed, continue to heat at 7℃ / min to the formal sintering temperature of 1275℃, and hold at the temperature for 3.5 hours after reaching the temperature; after sintering is completed, control the cooling rate to 4℃ / min and slowly cool to room temperature to obtain the sintered body.

[0040] 7) Stress-relief annealing and post-processing: The sintered body is transferred to an annealing furnace (model HTF-1000), the annealing temperature is set to 750℃, the heating rate is 6℃ / min, and the temperature is held for 1 hour after reaching the set temperature to complete the stress-relief annealing treatment; after annealing, it is cooled to room temperature and the sintered body is removed; the sintered body is machined using a CNC lathe (model CK6150) to remove excess edges and corners, and then polished by a surface grinder (model M7130) (surface roughness Ra≤0.6μm). Finally, deburring and cleaning are performed to obtain the final ceramic-glass composite high mechanical strength suspension insulator. Example 3

[0041] A method for preparing a ceramic-glass composite suspension insulator with high mechanical strength includes the following steps: 1) Raw material composition: Accurately weigh each raw material component by mass, and the specific amounts are as follows: α-Al2O3 powder 80kg (purity ≥99.8%, average particle size D50=2.0μm, α phase content ≥99%); ZrO2 powder 7.5kg (5mol% Y2O3 stabilized ZrO2, purity ≥99.5%, average particle size D50=1.0μm); silicate low melting point glass powder 30kg (borosilicate glass powder, composition: 68wt% SiO2, 18wt% B2O3, 8wt% Na2O, 6wt% MgO, average particle size D50=3.0μm); dispersant 1.5kg; wetting agent 1.5kg (polyethylene glycol 600, purity ≥99.0%); organic binder 4kg (lignin, purity ≥98.0%, sulfonation degree 60%). The weighed solid raw materials (excluding liquid additives) were placed into a three-dimensional mixer (model SYH-50, speed 170r / min) and premixed for 30 minutes to obtain preliminary mixed raw materials.

[0042] The dispersant is prepared by weighing 39 kg of stearamide (purity ≥ 98.5%), 11 kg of hexamethylenediamine (purity ≥ 99.0%), 2.0 kg of zinc 2-methacrylate (CAS: 14643-87-9, purity ≥ 98.0%), 9 kg of hexafluorobutyl acrylate (purity ≥ 98.5%), and 350 kg of... DMF (purity ≥99.5%) and 0.5 kg of zirconium aminophthalate MOF (CAS: 1260119-00-3, particle size 50-100 nm) were added to a 500 L three-necked reactor. The stirrer was turned on (speed 140 r / min), and after stirring and mixing evenly, the temperature was raised to 68 °C and the reaction was maintained at a constant temperature for 70 minutes. After the reaction was completed, the reaction solution was transferred to a vacuum distillation column and distilled under vacuum conditions of -0.088 MPa and 90 °C for 3 hours to remove DMF from the system. The distillation residue was placed in a vacuum drying oven (70 °C, -0.09 MPa) and dried for 5 hours. After removal, it was crushed and passed through a 200 mesh sieve to obtain a powdered dispersant, which was sealed for later use.

[0043] 2) Ball milling treatment: The pre-mixed raw materials were transferred into a planetary ball mill (model QM-6SP4, ball milling jar volume 10L), and ball milling media (zirconia beads, ball diameter 8mm, media to powder weight ratio 6:1) were added. Then, 100kg of ethanol-water mixed solvent (ethanol to water volume ratio 7:3, purity ≥99.7%) was added as the ball milling solvent. The ball mill speed was set to 200rpm and the ball milling time was 18 hours. During the ball milling process, the machine was stopped every 2 hours to observe the slurry state to ensure that there was no clumping. After the ball milling was completed, a uniform and fine mixed slurry was obtained (slurry viscosity 3000mPa·s, 25℃).

[0044] 3) Solvent Removal and Powdering: The ball-milled slurry was transferred to a vacuum distillation mill (model RE-52AA) to remove the solvent under a vacuum of -0.08 MPa and a temperature of 60°C, resulting in a viscous material. The viscous material was then placed in a vacuum drying oven (70°C, -0.09 MPa) and dried for 8 hours until constant weight was achieved. After drying, the material was transferred to a high-speed pulverizer (model FS-100, speed 12000 r / min) for pulverization and passed through an 180-mesh sieve to obtain a free-flowing, compressible powder (loose packing density 1.4 g / cm³). 3 ).

[0045] 4) Molding process: The compressible powder is evenly loaded into a special mold for insulators (size Φ120mm×350mm) and placed into a hydraulic press (model Y32-100); the pressure is set to 200MPa and the holding time is 5 minutes to obtain the molded blank; after molding, the blank is removed and the appearance is observed to be free of defects such as cracks, missing material, and delamination, and the density of the blank is ≥72%.

[0046] 5) Pre-firing / drying treatment: The formed blank is placed in a box-type sintering furnace (model SX-800) and pre-firing is carried out; the temperature is set at 150℃ and pre-firing is carried out at a constant temperature for 36 hours; after the pre-firing is completed, the moisture content of the blank is sampled and tested. The moisture content is 0.2% (≤0.5%) by Karl Fischer moisture analyzer, which meets the requirements.

[0047] 6) Sintering treatment: The dried blanks are loaded into an atmosphere sintering furnace (model SL-1400), and air atmosphere (flow rate 1.0 m³ / h) is introduced into the furnace. 3 / h); pre-sintering and formal sintering are carried out according to the procedure: the pre-sintering process is to heat from room temperature to 800℃ at 11℃ / min, and hold at the temperature for 2.5 hours after reaching the temperature; after the pre-sintering is completed, continue to heat at 11℃ / min to the formal sintering temperature of 1350℃, and hold at the temperature for 5 hours after reaching the temperature; after sintering is completed, control the cooling rate to 7℃ / min and slowly cool to room temperature to obtain the sintered body.

[0048] 7) Stress-relief annealing and post-processing: The sintered body is transferred to an annealing furnace (model HTF-1000), the annealing temperature is set to 800℃, the heating rate is 7℃ / min, and the temperature is held for 1.5 hours after reaching the set temperature to complete the stress-relief annealing treatment; after annealing, the body is cooled to room temperature and removed; the sintered body is machined using a CNC lathe (model CK6150) to remove excess edges and corners, and then polished by a surface grinder (model M7130) (surface roughness Ra≤0.4μm). Finally, deburring and cleaning are performed to obtain the final ceramic-glass composite high mechanical strength suspension insulator. Example 4

[0049] A method for preparing a ceramic-glass composite suspension insulator with high mechanical strength includes the following steps: 1) Raw material composition: Accurately weigh each raw material component by mass, and the specific amounts are as follows: 90 kg of α-Al2O3 powder (purity ≥99.8%, average particle size D50=2.5μm, α phase content ≥99%); 10 kg of ZrO2 powder (8mol% Y2O3 stabilized ZrO2, purity ≥99.5%, average particle size D50=1.2μm); 40 kg of silicate low melting point glass powder (B2O3-SiO2 series glass powder, composition: 72wt% SiO2, 22wt% B2O3, 6wt% K2O, average particle size D50=3.5μm); 2 kg of dispersant; 2 kg of wetting agent (polypropylene glycol 600, purity ≥99.0%); 5 kg of organic binder (polyvinyl alcohol and polyvinylpyrrolidone compounded at a mass ratio of 1:1, polyvinyl alcohol degree of polymerization 1700, polyvinylpyrrolidone molecular weight 40000). The weighed solid raw materials (excluding liquid additives) were placed into a three-dimensional mixer (model SYH-50, speed 180r / min) and premixed for 35 minutes to obtain preliminary mixed raw materials.

[0050] The dispersant is prepared by weighing 42 kg of stearamide (purity ≥ 98.5%), 13 kg of hexamethylenediamine (purity ≥ 99.0%), 2.3 kg of zinc 2-methacrylate (CAS: 14643-87-9, purity ≥ 98.0%), 10 kg of hexafluorobutyl acrylate (purity ≥ 98.5%), and 400 kg of... DMF (purity ≥99.5%) and 0.6 kg of zirconium aminophthalate MOF (CAS: 1260119-00-3, particle size 50-100 nm) were added to a 500 L three-necked reactor. The stirrer was turned on (speed 160 r / min), and after stirring and mixing evenly, the temperature was raised to 70 °C and the reaction was maintained at a constant temperature for 80 minutes. After the reaction was completed, the reaction solution was transferred to a vacuum distillation column and distilled under vacuum of -0.09 MPa and 95 °C for 3.5 hours to remove DMF from the system. The distillation residue was placed in a vacuum drying oven (75 °C, -0.09 MPa) and dried for 6 hours. After removal, it was pulverized and passed through a 200 mesh sieve to obtain a powdered dispersant, which was sealed for later use.

[0051] 2) Ball milling treatment: The pre-mixed raw materials were transferred to a planetary ball mill (model QM-6SP4, ball mill jar volume 10L), and ball milling media (alumina beads, ball diameter 8mm, media to powder weight ratio 6:1) were added. Then, 110kg of isopropanol-water mixed solvent (isopropanol to water volume ratio 8:2, purity ≥99.7%) was added as the ball milling solvent. The ball mill speed was set to 250rpm and the ball milling time was 24 hours. During the ball milling process, the machine was stopped every 2 hours to observe the slurry state to ensure that there was no clumping. After the ball milling was completed, a uniform and fine mixed slurry was obtained (slurry viscosity 3500mPa·s, 25℃).

[0052] 3) Solvent Removal and Powdering: The ball-milled slurry was transferred to a vacuum distillation mill (model RE-52AA) to remove the solvent under a vacuum of -0.085 MPa and a temperature of 65°C, resulting in a viscous material. The viscous material was then placed in a vacuum drying oven (75°C, -0.09 MPa) and dried for 9 hours until constant weight was achieved. After drying, the material was transferred to a high-speed pulverizer (model FS-100, speed 12000 r / min) for pulverization and passed through an 180-mesh sieve to obtain a free-flowing, compressible powder (loose packing density 1.5 g / cm³). 3 ).

[0053] 4) Molding process: The compressible powder is evenly loaded into a rubber mold (size Φ120mm×350mm) and placed in a cold isostatic press (model YLB-630); the pressure is set to 250MPa and the holding time is 6 minutes to obtain the molded blank; after molding, the blank is removed and the appearance is observed to be free of defects such as cracks, missing material, and delamination, and the density of the blank is ≥75%.

[0054] 5) Pre-firing / drying treatment: The formed blank is placed in a box-type sintering furnace (model SX-800) and pre-firing is carried out; the temperature is set at 180℃ and pre-firing is carried out at a constant temperature for 48 hours; after the pre-firing is completed, the moisture content of the blank is sampled and tested. The moisture content is 0.15% (≤0.5%) by Karl Fischer moisture analyzer, which meets the requirements.

[0055] 6) Sintering treatment: The dried blanks are loaded into an atmosphere sintering furnace (model SL-1400), and air atmosphere (flow rate 1.2 m³ / h) is introduced into the furnace. 3 / h); pre-sintering and formal sintering are carried out according to the procedure: the pre-sintering process is to heat from room temperature to 850℃ at 15℃ / min, and hold at the temperature for 3 hours after reaching the temperature; after the pre-sintering is completed, continue to heat at 15℃ / min to the formal sintering temperature of 1400℃, and hold at the temperature for 6 hours after reaching the temperature; after sintering is completed, control the cooling rate to 10℃ / min and slowly cool to room temperature to obtain the sintered body.

[0056] 7) Stress-relief annealing and post-processing: The sintered body is transferred to an annealing furnace (model HTF-1000), the annealing temperature is set to 850℃, the heating rate is 8℃ / min, and the temperature is held for 2 hours after reaching the temperature to complete the stress-relief annealing treatment; after annealing, it is cooled to room temperature and the sintered body is taken out; the sintered body is machined using a CNC lathe (model CK6150) to remove excess edges and corners, and then polished by a surface grinder (model M7130) (surface roughness Ra≤0.2μm). Finally, deburring and cleaning are performed to obtain the final ceramic-glass composite high mechanical strength suspension insulator.

[0057] Comparative Example 1 A method for preparing a ceramic-glass composite suspension insulator with high mechanical strength includes the following steps: 1) Raw material composition: Accurately weigh each raw material component by mass, with the following specific amounts: 60 kg of α-Al₂O₃ powder (purity ≥99.8%, average particle size D50=1.0μm, α phase content ≥99%); 0 kg of ZrO₂ powder (not added); 10 kg of silicate low-melting-point glass powder (borosilicate glass powder, composition: 65wt%SiO₂, 20wt%B₂O₃, 10wt%Na₂O, 5wt%CaO, average particle size D50=2.0μm); 0.1 kg of dispersant sodium polyacrylate; 0.1 kg of wetting agent (polyethylene glycol 400, purity ≥99.0%); 1 kg of organic binder (polyvinyl alcohol, degree of polymerization 1700, degree of alcoholysis 88%). Place the above-weighed solid raw materials (except for liquid additives) into a three-dimensional mixer (model SYH-50, speed 150r / min) and premix for 20 minutes to obtain a preliminary mixed raw material.

[0058] 2) Ball milling treatment: The pre-mixed raw materials were transferred into a planetary ball mill (model QM-6SP4, ball mill jar volume 10L), and the ball milling media (zirconia beads, ball diameter 8mm, media to powder weight ratio 6:1) were added. Then, 80kg of ethanol (purity ≥99.7%) was added as the ball milling solvent. The ball mill speed was set to 100rpm and the ball milling time was 6 hours. During the ball milling process, the machine was stopped every 2 hours to observe the slurry state to ensure that there was no clumping. After the ball milling was completed, a uniform and fine mixed slurry was obtained (slurry viscosity 2000mPa·s, 25℃).

[0059] 3) Solvent Removal and Powdering: The ball-milled slurry was transferred to a vacuum distillation mill (model RE-52AA) to remove the ethanol solvent under a vacuum of -0.07 MPa and a temperature of 50°C, resulting in a viscous material. The viscous material was then placed in a vacuum drying oven (60°C, -0.09 MPa) and dried for 6 hours until constant weight was achieved. After drying, the material was transferred to a high-speed pulverizer (model FS-100, speed 12000 r / min) for pulverization and passed through an 180-mesh sieve to obtain a free-flowing, compressible powder (loose packing density 1.2 g / cm³). 3 ).

[0060] 4) Molding process: The compressible powder is evenly loaded into a special mold for insulators (size Φ120mm×350mm) and placed into a hydraulic press (model Y32-100); the pressure is set to 120MPa and the holding time is 3 minutes to obtain the molded blank; after molding, the blank is removed and the appearance is observed to be free of defects such as cracks, missing material, and delamination, and the density of the blank is ≥65%.

[0061] 5) Pre-firing / drying treatment: Place the shaped blank into a box-type drying oven (model SX-800) and use the drying method; set the temperature to 80℃ and dry at a constant temperature for 12 hours; after drying, take a sample to test the moisture content of the blank. The moisture content was measured by a Karl Fischer moisture analyzer and was 0.3% (≤0.5%), which meets the requirements.

[0062] 6) Sintering treatment: The dried blanks are loaded into an atmosphere sintering furnace (model SL-1400), and air atmosphere (flow rate 0.5 m³ / h) is introduced into the furnace. 3 / h); pre-sintering and formal sintering are carried out according to the procedure: the pre-sintering process is to raise the temperature from room temperature to 600℃ at 3℃ / min, and hold it at the temperature for 1 hour after reaching the temperature; after the pre-sintering is completed, continue to raise the temperature at 3℃ / min to the formal sintering temperature of 1200℃, and hold it at the temperature for 2 hours after reaching the temperature; after sintering is completed, control the cooling rate to 2℃ / min and slowly cool it to room temperature to obtain the sintered body.

[0063] 7) Stress-relief annealing and post-processing: The sintered body is transferred to an annealing furnace (model HTF-1000), the annealing temperature is set to 700℃, the heating rate is 5℃ / min, and the temperature is held for 0.5 hours after reaching the set temperature to complete the stress-relief annealing treatment; after annealing, it is cooled to room temperature and the sintered body is removed; the sintered body is machined using a CNC lathe (model CK6150) to remove excess edges and corners, and then polished by a surface grinder (model M7130) (surface roughness Ra≤0.8μm). Finally, deburring and cleaning are performed to obtain the final ceramic-glass composite high mechanical strength suspension insulator.

[0064] Comparative Example 2 A method for preparing a ceramic-glass composite suspension insulator with high mechanical strength includes the following steps: 1) Raw material composition: Accurately weigh each raw material component by mass, with the following specific amounts: 60 kg of α-Al₂O₃ powder (purity ≥99.8%, average particle size D50=1.0 μm, α phase content ≥99%); 0 kg of ZrO₂ powder (not added); 10 kg of silicate low-melting-point glass powder (borosilicate glass powder, composition: 65wt% SiO₂, 20wt% B₂O₃, 10wt% Na₂O, 5wt% CaO, average particle size D50=2.0 μm); 0.1 kg of dispersant; 0.1 kg of wetting agent (polyethylene glycol 400, purity ≥99.0%); 1 kg of organic binder (polyvinyl alcohol, degree of polymerization 1700, degree of alcoholysis 88%). Place the above-weighed solid raw materials (except for liquid additives) into a three-dimensional mixer (model SYH-50, speed 150 r / min) and premix for 20 minutes to obtain a preliminary mixed raw material.

[0065] The dispersant is prepared by weighing 33 kg of stearamide (purity ≥ 98.5%), 7 kg of hexamethylenediamine (purity ≥ 99.0%), 5 kg of hexafluorobutyl acrylate (purity ≥ 98.5%), and 250 kg of... DMF (N,N-dimethylformamide, purity ≥99.5%) and 0.25 kg of zirconium aminophthalate MOF (CAS: 1260119-00-3, particle size 50-100 nm) were added to a 500 L three-necked reactor. The stirrer was turned on (100 r / min), and after stirring and mixing evenly, the temperature was raised to 60 °C and the reaction was maintained at a constant temperature for 40 minutes. After the reaction was completed, the reaction solution was transferred to a vacuum distillation column and distilled under vacuum of -0.08 MPa and 80 °C for 2 hours to remove DMF from the system. The distillation residue was placed in a vacuum drying oven (60 °C, -0.09 MPa) and dried for 4 hours. After drying, it was crushed and passed through a 200 mesh sieve to obtain a powdered dispersant, which was then sealed for later use.

[0066] 2) Ball milling treatment: The pre-mixed raw materials were transferred into a planetary ball mill (model QM-6SP4, ball mill jar volume 10L), and the ball milling media (zirconia beads, ball diameter 8mm, media to powder weight ratio 6:1) were added. Then, 80kg of ethanol (purity ≥99.7%) was added as the ball milling solvent. The ball mill speed was set to 100rpm and the ball milling time was 6 hours. During the ball milling process, the machine was stopped every 2 hours to observe the slurry state to ensure that there was no clumping. After the ball milling was completed, a uniform and fine mixed slurry was obtained (slurry viscosity 2000mPa·s, 25℃).

[0067] 3) Solvent Removal and Powdering: The ball-milled slurry was transferred to a vacuum distillation mill (model RE-52AA) to remove the ethanol solvent under a vacuum of -0.07 MPa and a temperature of 50°C, resulting in a viscous material. The viscous material was then placed in a vacuum drying oven (60°C, -0.09 MPa) and dried for 6 hours until constant weight was achieved. After drying, the material was transferred to a high-speed pulverizer (model FS-100, speed 12000 r / min) for pulverization and passed through an 180-mesh sieve to obtain a free-flowing, compressible powder (loose packing density 1.2 g / cm³). 3 ).

[0068] 4) Molding process: The compressible powder is evenly loaded into a special mold for insulators (size Φ120mm×350mm) and placed into a hydraulic press (model Y32-100); the pressure is set to 120MPa and the holding time is 3 minutes to obtain the molded blank; after molding, the blank is removed and the appearance is observed to be free of defects such as cracks, missing material, and delamination, and the density of the blank is ≥65%.

[0069] 5) Pre-firing / drying treatment: Place the shaped blank into a box-type drying oven (model SX-800) and use the drying method; set the temperature to 80℃ and dry at a constant temperature for 12 hours; after drying, take a sample to test the moisture content of the blank. The moisture content was measured by a Karl Fischer moisture analyzer and was 0.3% (≤0.5%), which meets the requirements.

[0070] 6) Sintering treatment: The dried blanks are loaded into an atmosphere sintering furnace (model SL-1400), and air atmosphere (flow rate 0.5 m³ / h) is introduced into the furnace. 3 / h); pre-sintering and formal sintering are carried out according to the procedure: the pre-sintering process is to raise the temperature from room temperature to 600℃ at 3℃ / min, and hold it at the temperature for 1 hour after reaching the temperature; after the pre-sintering is completed, continue to raise the temperature at 3℃ / min to the formal sintering temperature of 1200℃, and hold it at the temperature for 2 hours after reaching the temperature; after sintering is completed, control the cooling rate to 2℃ / min and slowly cool it to room temperature to obtain the sintered body.

[0071] 7) Stress-relief annealing and post-processing: The sintered body is transferred to an annealing furnace (model HTF-1000), the annealing temperature is set to 700℃, the heating rate is 5℃ / min, and the temperature is held for 0.5 hours after reaching the set temperature to complete the stress-relief annealing treatment; after annealing, it is cooled to room temperature and the sintered body is removed; the sintered body is machined using a CNC lathe (model CK6150) to remove excess edges and corners, and then polished by a surface grinder (model M7130) (surface roughness Ra≤0.8μm). Finally, deburring and cleaning are performed to obtain the final ceramic-glass composite high mechanical strength suspension insulator.

[0072] Comparative Example 3 A method for preparing a ceramic-glass composite suspension insulator with high mechanical strength includes the following steps: 1) Raw material composition: Accurately weigh each raw material component by mass, with the following specific amounts: 60 kg of α-Al₂O₃ powder (purity ≥99.8%, average particle size D50=1.0 μm, α phase content ≥99%); 0 kg of ZrO₂ powder (not added); 10 kg of silicate low-melting-point glass powder (borosilicate glass powder, composition: 65wt% SiO₂, 20wt% B₂O₃, 10wt% Na₂O, 5wt% CaO, average particle size D50=2.0 μm); 0.1 kg of dispersant; 0.1 kg of wetting agent (polyethylene glycol 400, purity ≥99.0%); 1 kg of organic binder (polyvinyl alcohol, degree of polymerization 1700, degree of alcoholysis 88%). Place the above-weighed solid raw materials (except for liquid additives) into a three-dimensional mixer (model SYH-50, speed 150 r / min) and premix for 20 minutes to obtain a preliminary mixed raw material.

[0073] The dispersant is prepared as follows: Weigh 33 kg stearamide (purity ≥98.5%), 7 kg hexamethylenediamine (purity ≥99.0%), 0.8 kg zinc 2-methacrylate (CAS: 14643-87-9, purity ≥98.0%), 5 kg hexafluorobutyl acrylate (purity ≥98.5%), and 250 kg DMF (N,N-dimethylformamide, purity ≥99.5%), and add them all to a 500 L three-necked reactor; turn on the stirrer (speed 100 r / min), stir and mix evenly, then heat to 60 °C and react at a constant temperature for 40 minutes; after the reaction is completed, transfer the reaction solution to a vacuum distillation column, and distill under vacuum at -0.08 MPa and 80 °C for 2 hours to remove DMF from the system; place the distillation residue in a vacuum drying oven (60 °C, -0.09 MPa) and dry for 4 hours, then pulverize it through a 200 mesh sieve to obtain a powdered dispersant, which is then sealed for later use.

[0074] 2) Ball milling treatment: The pre-mixed raw materials were transferred into a planetary ball mill (model QM-6SP4, ball mill jar volume 10L), and the ball milling media (zirconia beads, ball diameter 8mm, media to powder weight ratio 6:1) were added. Then, 80kg of ethanol (purity ≥99.7%) was added as the ball milling solvent. The ball mill speed was set to 100rpm and the ball milling time was 6 hours. During the ball milling process, the machine was stopped every 2 hours to observe the slurry state to ensure that there was no clumping. After the ball milling was completed, a uniform and fine mixed slurry was obtained (slurry viscosity 2000mPa·s, 25℃).

[0075] 3) Solvent Removal and Powdering: The ball-milled slurry was transferred to a vacuum distillation mill (model RE-52AA) to remove the ethanol solvent under a vacuum of -0.07 MPa and a temperature of 50°C, resulting in a viscous material. The viscous material was then placed in a vacuum drying oven (60°C, -0.09 MPa) and dried for 6 hours until constant weight was achieved. After drying, the material was transferred to a high-speed pulverizer (model FS-100, speed 12000 r / min) for pulverization and passed through an 180-mesh sieve to obtain a free-flowing, compressible powder (loose packing density 1.2 g / cm³). 3 ).

[0076] 4) Molding process: The compressible powder is evenly loaded into a special mold for insulators (size Φ120mm×350mm) and placed into a hydraulic press (model Y32-100); the pressure is set to 120MPa and the holding time is 3 minutes to obtain the molded blank; after molding, the blank is removed and the appearance is observed to be free of defects such as cracks, missing material, and delamination, and the density of the blank is ≥65%.

[0077] 5) Pre-firing / drying treatment: Place the shaped blank into a box-type drying oven (model SX-800) and use the drying method; set the temperature to 80℃ and dry at a constant temperature for 12 hours; after drying, take a sample to test the moisture content of the blank. The moisture content was measured by a Karl Fischer moisture analyzer and was 0.3% (≤0.5%), which meets the requirements.

[0078] 6) Sintering treatment: The dried blanks are loaded into an atmosphere sintering furnace (model SL-1400), and air atmosphere (flow rate 0.5 m³ / h) is introduced into the furnace. 3 / h); pre-sintering and formal sintering are carried out according to the procedure: the pre-sintering process is to raise the temperature from room temperature to 600℃ at 3℃ / min, and hold it at the temperature for 1 hour after reaching the temperature; after the pre-sintering is completed, continue to raise the temperature at 3℃ / min to the formal sintering temperature of 1200℃, and hold it at the temperature for 2 hours after reaching the temperature; after sintering is completed, control the cooling rate to 2℃ / min and slowly cool it to room temperature to obtain the sintered body.

[0079] 7) Stress-relief annealing and post-processing: The sintered body is transferred to an annealing furnace (model HTF-1000), the annealing temperature is set to 700℃, the heating rate is 5℃ / min, and the temperature is held for 0.5 hours after reaching the set temperature to complete the stress-relief annealing treatment; after annealing, it is cooled to room temperature and the sintered body is removed; the sintered body is machined using a CNC lathe (model CK6150) to remove excess edges and corners, and then polished by a surface grinder (model M7130) (surface roughness Ra≤0.8μm). Finally, deburring and cleaning are performed to obtain the final ceramic-glass composite high mechanical strength suspension insulator.

[0080] Test method: 1. Three-point bending strength test Test Standards and Methods: A three-point bending test was conducted on a universal testing machine. Specimen dimensions were prepared according to standard specifications, and the support span L, loading rate, and fixtures were all controlled according to standards. Bending strength σf was calculated using the following formula: σf=3FL / 2bd 2 Where F is the peak load, and b and d are the sample width and thickness, respectively; see the introduction to the principle of the three-point bending test.

[0081] 2. Thermal shock cycling test Test method: The sample is subjected to 10 cycles of heating / cooling between high temperature (500℃) and room temperature to check for cracks or structural damage (isothermal residence and rapid cooling cycles are performed according to the requirements of GB / T 775.1 / IEC 61109 thermal cycling). 3. Breakdown dielectric strength Test method: According to the IEC 60243-1 dielectric strength test method, the test sample is subjected to an increasing DC voltage at room temperature until breakdown, the breakdown voltage is recorded and converted into specific strength (kV / mm). 4. Dielectric constant and loss Test method: The dielectric constant ε_r and loss tangent tanδ of the sample were measured using a high-precision LCR bridge at 1 MHz.

[0082] Test results: Test results show that this preparation method, through raw material composite design, specialized dispersant development, and process optimization, achieves a synergistic improvement in the mechanical, thermal shock resistance, and dielectric properties of insulators. The core innovation lies in the amino addition reaction of stearamide with zinc 2-methacrylate and hexafluorobutyl acrylate during dispersant preparation, combined with the synergistic effect of zirconium aminophthalate MOF, to construct a high-performance dispersion system, thereby improving the uniformity of raw material mixing and the quality of interfacial bonding from the source. Compared to traditional methods, this method significantly improves the structural reliability of the material without sacrificing insulation performance, and the process is stable and easily industrialized, providing a superior solution for insulators used in high-end transmission lines.

[0083] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a ceramic-glass composite high mechanical strength suspension insulator, characterized in that, Includes the following steps: 1) Prepare the raw material components according to the mass percentages: 60-90 parts of α-Al₂O₃ powder; 0-10 parts of ZrO2 powder; 10-40 parts of silicate low-melting-point glass powder; Dispersant 0.1-2 parts; 0.1-2 parts of wetting agent; 1-5 parts organic binder; 2) Add the above components to a ball mill jar and mix with an organic solvent. Then, use ball milling media to perform ball milling treatment for 6-24 hours at a speed of 100-250 rpm. 3) Remove the solvent from the ball-milled slurry, dry it, and pulverize it to obtain a compressible powder; 4) The compressible powder is loaded into the mold and formed by uniaxial pressing or isostatic pressing, and pressure is applied to obtain the formed blank; 5) Pre-fire or dry the formed blank for 12-48 hours to reduce the moisture content of the blank to ≤0.5%; 6) Load the dried blanks into the sintering furnace for pre-sintering and formal sintering. After sintering, slowly cool them to room temperature. 7) The sintered body is subjected to stress-relief annealing at a temperature of 700-850℃ for 0.5-2 hours, and then the final product is obtained by machining or surface polishing. The dispersant is prepared by reacting stearamide, hexamethylenediamine, zinc 2-methacrylate, hexafluorobutyl acrylate, and zirconium aminophthalate MOF.

2. The method for preparing a ceramic-glass composite high mechanical strength suspension insulator according to claim 1, characterized in that: The silicate low-melting-point glass powder is selected from borosilicate glass or B2O3-SiO2 glass powder.

3. The method for preparing a ceramic-glass composite high mechanical strength suspension insulator according to claim 1, characterized in that: The organic binder is selected from polyvinyl alcohol, polyvinylpyrrolidone, lignin, or mixtures thereof.

4. The method for preparing a ceramic-glass composite high mechanical strength suspension insulator according to claim 1, characterized in that: The dispersant is prepared by: Add 33-42 parts stearamide, 7-13 parts hexamethylenediamine, 0.8-2.3 parts zinc 2-methacrylate, 5-10 parts hexafluorobutyl acrylate, 250-400 parts DMF, and 0.25-0.6 parts zirconium aminophthalate (MOF) to a reaction vessel, stir and mix evenly, control the reaction temperature at 60-70℃, and react at a constant temperature for 40-80 minutes; after the reaction is completed, remove DMF from the system by vacuum distillation, dry, and obtain a powdered high-efficiency dispersant for insulators.

5. The method for preparing a ceramic-glass composite high mechanical strength suspension insulator according to claim 1, characterized in that: The organic solvent is ethanol, isopropanol, water, or a mixture thereof.

6. The method for preparing a ceramic-glass composite high mechanical strength suspension insulator according to claim 1, characterized in that: The ball milling media are either zirconia beads or alumina beads.

7. The method for preparing a ceramic-glass composite high mechanical strength suspension insulator according to claim 1, characterized in that: The pressure applied to the forming blank is 120-250 MPa.

8. The method for preparing a ceramic-glass composite high mechanical strength suspension insulator according to claim 1, characterized in that: The pre-sintering process involves heating from room temperature to 600-850℃ at a rate of 3-15℃ / min and holding at that temperature for 1-3 hours.

9. The method for preparing a ceramic-glass composite high mechanical strength suspension insulator according to claim 1, characterized in that: The formal sintering process involves heating from the pre-sintering temperature to 1200-1400℃ at a rate of 3-15℃ / min and holding for 2-6 hours.

10. The method for preparing a ceramic-glass composite high mechanical strength suspension insulator according to claim 1, characterized in that: The slow cooling rate to room temperature is 2-10°C / min.

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