31 results about "Stannate" patented technology

The invention discloses a preparation method and application of a double-biomass carbon source coated ammonium polyphosphate intumescent flame retardant with a core-shell structure. Ammonium polyphosphate is used as a core, composite coating of chitosan and zinc stannate is achieved through an ion exchange reaction and a chelation reaction, then a lignin shell layer is introduced through a Mannich reaction, and the lignin and chitosan double-carbon-source coated intumescent flame-retardant antibacterial synergist is obtained. The flame retardant disclosed by the invention is simple and convenient in preparation process and high in safety, most of the raw materials are derived from green renewable biomass materials with low cost, and the flame retardant has environment-friendly characteristic and excellent polymer compatibility. The microcapsule surface modification technology enhances the interfacial interaction between the additive and the polymer matrix, systematic optimization of the flame retardant property of the composite material is realized, and when the flame retardant is used for modifying the TPU material, the molten drop phenomenon and a large amount of dense smoke generated in the combustion process can be effectively inhibited, and the TPU composite material can be endowed with excellent long-acting antibacterial property.

The invention relates to a method for plasma-assisted sintering of calcium stannate short-wave infrared long afterglow powder, the chemical composition of the long afterglow powder is Ca2SnO4: xEr < 3 + > / Pr < 3 + > / Nd < 3 + >, and x is more than or equal to 0.1 and less than or equal to 1; the long afterglow powder takes calcium stannate as a matrix and is formed by doping and sintering rare earth capable of emitting red light. The sintering adopts a stir-frying plasma assisted low-temperature sintering method, compounds containing an erbium element, a praseodymium element and a neodymium element are doped, namely erbium trioxide, praseodymium trioxide and neodymium oxide, and H3BO3 is added as a fluxing agent to prepare a sample. The method is low in energy consumption, and the yield of the calcium stannate fluorescent powder is effectively improved; according to the invention, short-wave infrared long-afterglow luminescence of doped ions is realized, and the emission wavelength is adjustable from 800nm to 1600nm.

The invention belongs to the technical field of composite coatings, and particularly relates to a copper-tin electroplating solution and a preparation method and application thereof.The preparation method of the electroplating solution comprises the steps that citric acid is dispersed in water, potassium hydroxide is added, and a reaction solution 1 is obtained; basic cupric carbonate is added into the reaction solution until the solution becomes clear and does not generate bubbles, the solution is cooled, monopotassium phosphate is added, and a reaction solution 2 is obtained; dissolving potassium stannate in a dilute alkali hot solution, and after the potassium stannate is completely dissolved, adding hydrogen peroxide to obtain a reaction solution 3; and adding the cooled reaction liquid 3 into the reaction liquid 2 to obtain the electroplating liquid. The preparation method of the electroplating solution is simple and almost free of pollution, the electroplating solution is used for electroplating a metal test piece, and an obtained plating layer has high corrosion resistance.

The invention relates to the technical field of coatings, in particular to an oily fireproof coating and a preparation method thereof. The oily fireproof coating is prepared from the following components in parts by weight: 15 to 19 parts of modified epoxy resin, 5 to 7 parts of organic silicon modified acrylic resin, 10 to 12 parts of silane modified ammonium polyphosphate, 5 to 8 parts of pentaerythritol, 3 to 5 parts of zinc borate, 10 to 12 parts of hydrotalcite coated zinc stannate composite material, 9 to 11 parts of boron nitride, 0.8 to 1.2 parts of dispersing agent, 0.2 to 0.4 part of flatting agent and 0.6 to 0.8 part of polyamide wax anti-settling agent. And 40-60 parts of a solvent. According to the oily fireproof coating provided by the invention, the fire endurance and flame retardance of the coating are improved, and the optimal fireproof protection effect is achieved; the compatibility of ammonium polyphosphate and an oleoresin matrix is improved, and the fireproof performance, the long-term storage stability and the medium corrosion resistance of a cured coating are improved.

The invention provides a doped porous carbon / lead composite negative electrode material and a preparation method thereof, and belongs to the technical field of battery materials, the composite negative electrode material comprises the following raw materials by weight: 95-100 parts of lead powder, 0.4-0.6 part of barium sulfate, 0.2-0.4 part of humic acid, 0.1-0.3 part of zinc stannate, 0.08-0.12 part of carbon black, 0.08-0.12 part of composite fiber, and 1.0-1.5 parts of doped porous carbon / lead powder; wherein the doped porous carbon / lead powder is prepared from the following raw materials: chitosan, dicyandiamide, thiourea, lead citrate and sodium borohydride. According to the prepared composite negative electrode material, the chemical property of the carbon surface is optimized by doping heteroatoms, and the growth of lead dendrites is inhibited by utilizing a porous structure, so that the cycle life and the performance of a battery are effectively improved.

The invention discloses an unsymmetrical dimethylhydrazine sensor based on an Ag-doped amorphous zinc stannate (ZnSnO3) sensitive material and a preparation method of the unsymmetrical dimethylhydrazine sensor, and belongs to the technical field of semiconductor metal oxide gas sensors. The preparation method comprises the following steps: firstly, taking tin tetrachloride pentahydrate and zinc chloride as metal precursors, taking citric acid hydrate as a metal complexing agent, preparing a zinc hydroxystannate ZnSn (OH) 6 nano cubic material with a hollow structure through a coprecipitation method and alkali etching, taking the zinc hydroxystannate ZnSn (OH) 6 nano cubic material as a precursor, preparing ZnSnO3 with an amorphous structure after high-temperature calcination, and obtaining an Ag-doped amorphous zinc stannate sensitive material through Ag doping; the material has the characteristics of high response, quick response recovery and low detection lower limit on low-concentration UDMH gas under the working condition of 175 DEG C. The sensor adopting the ceramic tube type structure is simple in manufacturing process, small in size and beneficial to industrial batch production, has important application value and has wide application prospects in the aspect of UDMH detection in a specific environment.

The invention relates to the technical field of power cables, and provides an anti-aging flame-retardant power cable which sequentially comprises a conductor, an insulating layer, an armor layer and a sheath layer from inside to outside, and the sheath layer is prepared from, by weight, 100 parts of linear low-density polyethylene, 2-3 parts of a photoinitiator, 0.2-0.5 part of an antioxidant, 0.03-0.08 part of a light stabilizer, 13-15 parts of a flame retardant and 5-6 parts of filler. The flame retardant comprises the following components in parts by weight: 100 parts of talcum powder loaded zinc stannate and 30-40 parts of magnesium hydroxide. According to the technical scheme, the problems of insufficient flame retardance and aging resistance of the sheath layer in the prior art are solved.

The invention discloses a method for recycling precipitation residues produced in the copper anode electrolytic refining process, and relates to the technical field of copper anode electrolytic refining. According to the method, the precipitation slag containing arsenic, tin, nickel, antimony and copper is treated, the physically entrained electrolyte is removed through water washing, most of copper, tin, antimony and the like are separated through a simple and low-cost flotation process, the obtained flotation copper concentrate is subjected to alkali liquor leaching to remove arsenic, antimony and tin, and the flotation effect is good. The leaching liquid is subjected to oxidative hydrolysis to remove antimony, and then calcium stannate slag and calcium arsenate slag are obtained through fractional precipitation of lime. The recycling method provided by the invention is low in cost, and resource utilization of arsenic, tin, antimony, nickel and copper can be realized.

The invention belongs to the technical field of metal material surface coating preparation and corrosion protection, and particularly relates to a stannate chemical conversion coating on a magnesium alloy surface and a preparation method of the stannate chemical conversion coating. The magnesium alloy is soaked in the stannate chemical conversion treatment solution added with the polyelectrolyte, the polyelectrolyte can be adsorbed on the metal surface, a more compact and more uniform composite coating is formed by a reaction product of the polyelectrolyte and the stannate, and the corrosion resistance and the mechanical property of the magnesium alloy are improved. After metal salt is added into the stannate chemical conversion treatment solution, a double-metal composite coating can be formed, and the double protection effect is achieved through the synergistic barrier effect. The coating prepared by the method disclosed by the invention is more uniform and flat in appearance, forms a larger and more uniform grain structure, is more compact and thicker, reduces the problems of microcracks and holes frequently occurring in a traditional stannate conversion film, is environment-friendly in process and environment-friendly, continues the advantages of no chromium and environment friendliness of a stannate system, meets the current environment-friendly requirements, and is suitable for industrial production. And the process is simple.

A curable composition comprising: a polyol component comprising one or more polyols; a functionalized butadiene component; and filler particles; wherein the curable composition has a thermal conductivity of at least 3.0 W / (mK) after curing. The filler particles include aluminum trihydroxide (ATH) and a smoke suppressant selected from zinc hydroxystannate (ZHS), zinc stannate, calcium stannate, calcium hydroxystannate, and any combination thereof.

The present application relates to the technical field of paint, and relates to an oil-based fireproof paint and a preparation method thereof.The oil-based fireproof paint comprises the following components in parts by weight: modified epoxy resin 15-19, organic silicon modified acrylic resin 5-7, silane modified ammonium polyphosphate 10-12, pentaerythritol 5-8, zinc borate 3-5, hydrotalcite coated zinc stannate composite material 10-12, boron nitride 9-11, dispersing agent 0.8-1.2, leveling agent 0.2-0.4, polyamide wax anti-settling agent 0.6-0.8, and solvent 40-60.The oil-based fireproof paint provided by the present application improves the fire resistance limit and the flame retardancy of the paint, and achieves the best fireproof protection effect;the compatibility of the ammonium polyphosphate and the oil-based resin matrix is improved, and the fireproof performance, the long-term storage stability and the medium corrosion resistance of the cured coating are improved.

The application discloses a mine anti-corrosion drainage pipeline and a preparation process thereof, and the preparation process comprises the following steps: cleaning a main pipeline to obtain a cleaned pipeline; placing the cleaned pipeline in a stannate solution to perform reaction, so that a stannate film layer is formed on the surface of the cleaned pipeline, and a stannate film layer pipeline is obtained; placing the stannate film layer pipeline in a biological carbon layer solution to perform standing, so that a biological carbon layer is formed on the surface of the stannate film layer pipeline, and a composite film layer pipeline is obtained; wrapping the surface of the composite film layer pipeline with an anti-corrosion cloth, and thus the mine anti-corrosion drainage pipeline is obtained; the composition of acid wastewater is fully considered, and limestone, biological carbon layer and other environment-friendly substances are used to solve the corrosion problem of acid wastewater to the pipeline in a mining area, the biological carbon layer can fix heavy metal ions in acid wastewater and underground soil, effectively hinders the migration of heavy metal elements, and reduces the pollution to the environment.

The present invention relates to a solid-state rechargeable zinc-air battery featuring a novel bifunctional electrocatalyst, a dual-crosslinked polyacrylic acid hydrogel electrolyte, and a stannate-based additive for in situ zinc anode modification. The cathode comprises a gas diffusion layer coated with ruthenium-ruthenium oxide core-shell nanoparticles supported on nitrogen-doped graphene, providing enhanced bifunctional catalytic activity and stability. The anode consists of zinc metal modified in situ by a stannate-based additive to form a solid electrolyte interphase layer, effectively suppressing dendrite formation. The electrolyte membrane is a polyacrylic acid hydrogel, covalently and ionically cross-linked, and soaked in an aqueous solution containing potassium hydroxide, zinc acetate, and a stannate-based additive, resulting in improved mechanical strength, ionic conductivity, and battery safety. The integrated system delivers high power density, specific capacity, and robust cycling stability, offering a significant advancement in the field of solid-state zinc-air batteries.

A method for preparing stannate through an electrochemical method comprises the steps that tin powder, alkali liquor with the concentration of 2.0-4.0 M and chlorination liquid with the concentration of 1.0 M are prepared, the alkali liquor is a sodium hydroxide solution or a potassium hydroxide solution, and the chlorination liquid is a sodium chloride solution or a potassium chloride solution; the material molar ratio of Sn to the alkali liquor to the chlorination liquid is 1.0: (2.0-4.0): 1.0; under the stirring condition, tin powder is added into alkali liquor, and suspension liquid is formed; adding a chlorination solution into the suspension, heating to 50-80 DEG C, and keeping the temperature for electrolytic reaction until tin is completely dissolved in the solution; and after electrolysis is completed, filtering while the solution is hot, concentrating filtrate, cooling and crystallizing, carrying out centrifugal separation, and washing and drying separated solid substances to obtain a stannate product. The invention provides a novel method for preparing stannate by electrolyzing a sodium chloride / potassium chloride solution to prepare pypocholoride instead of hydrogen peroxide as an oxidizing agent, and solves the problems of potential safety hazards in storage and transportation, poor product stability and the like in preparation of stannate by using hydrogen peroxide in the prior art.

The invention discloses a cobalt hexahydroxystannate catalyst based on ZIF-67 derivation and a preparation method and application thereof.The preparation method of the catalyst comprises the steps that cobalt salt and tin salt are dissolved in an alcohol solvent and mixed to be uniform, and a metal salt mixed solution is obtained; dissolving an organic ligand in an alcohol solvent to obtain a ligand solution; mixing the two solutions, carrying out a stirring reaction at room temperature to obtain a precursor suspension, transferring the precursor suspension into a closed reaction container, and carrying out a solvothermal reaction at a set temperature; and after the reaction is finished, carrying out solid-liquid separation, washing and drying on the product to obtain the cobalt hexahydroxystannate catalyst based on ZIF-67 derivation. The catalyst disclosed by the invention shows relatively high selectivity, has an extremely considerable application prospect in a reaction for electrocatalytic synthesis of hydrogen peroxide, and provides a technical scheme and a material basis with extremely potential for development of related fields.

The application discloses a sleeve material for heat-shrinkable terminals, which is prepared from the following raw materials in parts by weight: 100 parts of polyetherimide, 10-30 parts of polycarbonate, 20-40 parts of trizinc trimellitate, and 2-8 parts of nano-zinc stannate. The application also discloses a preparation method of the sleeve material for heat-shrinkable terminals and heat-shrinkable terminals prepared therefrom. The sleeve material for heat-shrinkable terminals has the characteristics of high strength and transparency, low water absorption, excellent high-temperature resistance and flame resistance, and good processability, and has better comprehensive performance.

The invention discloses a functional current collector with high elongation and tensile strength and a preparation method and application thereof, and relates to the technical field of functional current collectors. According to the invention, polyvinyl chloride, zinc stannate, a calcium-zinc stabilizer and a plasticizer are mixed, and melt extrusion is carried out to obtain a modified polyvinyl chloride film; then magnetron sputtering and water electroplating are carried out, a metal layer is formed on the surface of the film in sequence, and drying is carried out to obtain the functional current collector. Wherein the zinc stannate 2 has two particle sizes; the plasticizer is one or a combination of more of dioctyl phthalate, dibutyl phthalate and poly (1, 2-propylene glycol adipate), and also comprises a cardanol plasticizer; the functional current collector obtained by the preparation method has good tensile strength and high elongation.

The application relates to the technical field of power cables, and discloses an anti-aging and flame-retardant power cable which comprises, from inside to outside, a conductor, an insulation layer, an armored layer and a sheath layer, wherein the raw material of the sheath layer comprises the following components in parts by weight: 100 parts of linear low-density polyethylene, 2-3 parts of a photoinitiator, 0.2-0.5 parts of an antioxidant, 0.03-0.08 parts of a light stabilizer, 13-15 parts of a flame retardant and 5-6 parts of a filler; the flame retardant comprises the following components in parts by weight: 100 parts of talcum powder loaded with zinc stannate and 30-40 parts of magnesium hydroxide. Through the technical scheme, the problem of insufficient flame retardation and aging resistance of the sheath layer in the related art is solved.

The invention belongs to the technical field of acrylic resin manufacturing, and discloses an acrylic resin composition with low VOC emission as well as a preparation method and application thereof. Acrylic acid and glycidyl tertiary carboxylic ester are pre-polymerized firstly, then a monomer mixture II is added for polymerization to prepare water-based acrylic resin, and acrylamide in the monomer mixture II reduces VOC emission in the acrylic resin composition through chemical adsorption; barium-doped modified zinc stannate is formed on the surface of graphene oxide through a hydrothermal reaction of sulfur-doped graphene oxide, zinc acetate dihydrate, tin chloride pentahydrate and barium chloride, the nano VOC inhibitor is prepared through high-temperature calcination, and electron transfer can be promoted through compounding of graphene and zinc stannate so as to improve the VOC catalytic degradation efficiency. The acrylic resin composition with low VOC emission prepared by the invention has excellent scratch resistance and low VOC emission performance.

The application provides a novel piezoelectric catalytic activation method and application of ferrate, and belongs to the technical field of ferrate activation, which comprises the following steps: dissolving potassium ferrate in deionized water; then adding zinc stannate into the potassium ferrate solution; and finally, under the condition of ultrasonic, the piezoelectric property of zinc stannate is used to catalytically activate ferrate. The activation method of ferrate provided by the application can be used for the degradation of sulfonamide antibiotics in water, and the degradation efficiency is significantly better than that of ferrate alone, and the adaptability is strong, and stable activation effect can be shown in various anion environments, and more importantly, the novel activation method solves the problem that the stability and oxidizability of ferrate are incompatible, can react under neutral conditions, ensures the stability, and has the oxidizability at the same time, and is suitable for popularization and application in sewage treatment.

This invention discloses a B-site-doped high-entropy lead stannate ceramic powder and its preparation method, belonging to the field of high-entropy ceramic materials technology. The chemical formula of the B-site-doped high-entropy lead stannate ceramic powder provided by this invention is: Pb(Zr) 0.2 Sn 0.2 Sc 0.2 Nb 0.2 Ce 0.2 The preparation method of this ceramic powder is as follows: PbO, SnO2, Nb2O5, Sc2O3, CeO2, and ZrO2 powders are weighed according to the stoichiometric ratio of the chemical formula. To compensate for the volatilization of Pb, an additional 10% of the mass of PbO powder is weighed. The raw materials are mixed, ball-milled, dried, and then ground. After sintering and sieving, B-site doped high-entropy lead stannate ceramic powder is obtained. This invention dops Ce into the B-site of PbSnO3, and selects Zr, Sc, Nb, and Sn as the other four elements for the B-site. The five chemical elements have similar chemical properties and small differences in ionic radius, making it easy to form a solid solution. The resulting B-site doped high-entropy lead stannate ceramic powder achieves a high entropy at 10⁻⁶ ppm. 3 -10 7 At a test frequency of Hz, the dielectric constant of the material remains stable at room temperature, and the dielectric loss is reduced.

A magnesium alloy material includes a bulk portion, and a surface oxide layer formed on the bulk portion. The surface oxide layer includes magnesium oxide, hexagonal boron nitride nanosheets, nanoclay and stannate. The bulk portion includes based on a total weight of the bulk portion, 91.0 percent by weight (wt. %) to 97.5 wt. % of magnesium (Mg), 2.0 wt. % to 4.0 wt. % of aluminium (Al), 0 wt. % to 0.1 wt. % of copper (Cu), 0 wt. % to 0.01 wt. % of iron (Fe), 0.01 wt. % to 2.0 wt. % of manganese (Mn), 0 wt. % to 0.01 wt. % of nickel (Ni), 0 wt. % to 0.5 wt. % of silicon (Si) and 0.3 wt. % to 2.0 wt. % of zinc (Zn).

The application belongs to the field of chemistry and particularly relates to a palladium / stannic oxide composite catalyst for electro-oxidation of formic acid and a preparation method thereof. The method comprises the following steps: generating stannic oxide nanospheres by hydrolysis of stannate; taking the stannic oxide as a seed, reducing a palladium precursor to synthesize a palladium / stannic oxide catalyst with low palladium loading; and taking the palladium / stannic oxide catalyst with low palladium loading as a seed, reducing the palladium precursor again to prepare a palladium / stannic oxide catalyst with high palladium loading.

The invention provides a piezoelectric electro-catalytic reforming material as well as a preparation method and application thereof. The piezoelectric electro-catalytic reforming material provided by the invention is formed by alternately arranging sphalerite (ZB) and wurtzite (WZ) sections to form a homojunction, doping an S vacancy twin crystal Zn0. 5Cd0. 5SV solid solution (T-CZSV) material and coupling a photocatalytic material cobalt stannate (Co2SnO4 and CSO); wherein the existence of the homojunction enhances the separation of photo-induced electrons and holes, and meanwhile, under the action of mechanical stress, non-uniform distribution of charges in the T-CZSV can cause spontaneous polarization, so that an internal electric field is generated, and the separation of current carriers is effectively promoted. After the T-CZSV is coupled with a photocatalytic material cobalt stannate (Co2SnO4 and CSO) which is reasonable in lattice arrangement, stable in physicochemical property and complementary in energy band structure, the light absorption range is further widened, the photon-generated carrier separation efficiency is further improved, and efficient hydrogen production is assisted.

The application belongs to the technical field of catalyst preparation and hydrogen peroxide synthesis, and relates to a preparation method and application of a bimetallic hydroxyl compound catalyst, in particular to a preparation method of a bimetallic hydroxyl compound catalyst and a rare earth doped bimetallic hydroxyl compound catalyst. The bimetallic hydroxyl compound catalyst is obtained through a coprecipitation reaction by taking stannate, zinc salt and rare earth salt as reactants; the molar ratio of tin in the stannate, zinc in the zinc salt and rare earth in the rare earth salt is 1:(0.8-1):(0-0.2). The ZnSn(OH)6 catalyst or the rare earth doped ZnSn(OH)6 catalyst is prepared through one-step coprecipitation under the condition of not adding or adding the rare earth salt and without adding any additive by taking water-soluble zinc salt and stannate as raw materials, the preparation method is simple, a high-pressure closed container such as a hydrothermal kettle and other morphology control agents are not needed, and the performance of the ZnSn(OH)6 catalyst in piezoelectric catalysis synthesis of hydrogen peroxide is improved through rare earth doping.

A method for preparing a zinc stannate sensor sensitive to isopropanol belongs to the field of semiconductor material preparation technology. This invention aims to solve the problems of insufficient sensitivity, long response recovery time, and poor stability in existing zinc stannate gas sensors for isopropanol detection. The method includes: 1. Adding cobalt nitrate and 2-methylimidazole to methanol and stirring to dissolve; 2. Allowing to stand, centrifuging, filtering, and drying; 3. Sintering to obtain cobalt tetroxide; 4. Preparing a zinc stannate precursor mixed solution; 5. Hydrothermal reaction; 6. Sintering to obtain cobalt tetroxide heterojunction zinc stannate; 7. Adding cobalt tetroxide heterojunction zinc stannate and tetrachloroauric acid to deionized water and stirring to dissolve, then adding sodium citrate and stirring to dissolve; 8. Sintering to obtain gold-doped cobalt tetroxide heterojunction zinc stannate; 9. Preparing the sensor. This invention is used for preparing a zinc stannate sensor sensitive to isopropanol.

The application discloses a hydroxyl stannate and a preparation method and application thereof, and the hydroxyl stannate has a hollow cubic structure, and the hydroxyl stannate comprises at least one of doped or undoped manganese hydroxyl stannate or copper hydroxyl stannate. The hydroxyl stannate has excellent enzyme-like catalytic performance. The acid etching method is used in the application to prepare the hydroxyl stannate with the hollow cubic structure, and the method is simple, easy to operate, high in repeatability, low in cost and suitable for industrial production.

The invention discloses a carbon-coated zinc stannate material and application thereof. The carbon-coated zinc stannate material has a core-shell structure and comprises zinc stannate nanoparticles and a carbon layer coating the zinc stannate nanoparticles, the molar ratio of zinc to tin in the carbon-coated zinc stannate material is 2: (1.65-1.85). The carbon-coated zinc stannate material provided by the invention can be applied to a lithium ion capacitor, the prepared lithium ion capacitor shows excellent cycling stability and rate capability, and the application range of the carbon-coated zinc stannate material in the field of energy storage is expanded.

The invention discloses a sleeve material for a heat-shrinkable terminal. The sleeve material is prepared from the following raw materials in parts by weight: 100 parts of polyetherimide, 10-30 parts of polycarbonate, 20-40 parts of trizinc trimellitate and 2-8 parts of nano zinc stannate. The invention further discloses a preparation method of the sleeve material for the heat-shrinkable terminal and the heat-shrinkable terminal prepared from the sleeve material. The sleeve material for the heat-shrinkable terminal has the characteristics of high strength and transparency, low water absorption, excellent high-temperature resistance and flame retardance, good processability and better comprehensive performance.

The application discloses a series of high-stability negative temperature coefficient thermosensitive materials based on seven main element high-entropy rare earth stannate and application, and aims to solve the problem that existing pyrochlore structure stannate thermosensitive materials cannot meet long-term application under high-temperature environment. The series of thermosensitive materials are prepared by mixing lanthanum trioxide, neodymium trioxide, samarium trioxide, europium trioxide, gadolinium trioxide, dysprosium trioxide and tin dioxide with erbium trioxide or ytterbium trioxide respectively, and the preparation process comprises the following steps: wet three-dimensional vibration ball milling, powder calcination, cold isostatic pressing forming, high-temperature sintering and the like, and finally, the negative temperature coefficient thermosensitive material with the pyrochlore structure is obtained. The electrical performance parameters of the series of materials are as follows: B = 13914-14067 ± 1.89%K, rho 1500℃ = 180.26-204.09 ± 1.38% Omega.cm. The negative temperature coefficient thermosensitive material has the negative temperature coefficient characteristics in a wide temperature range of 400-1500 DEG C, and exhibits excellent high-temperature aging stability under the high-temperature condition of 1500 DEG C; after 500 hours of aging test, the resistance drift rate is only 0.7%.