Calcium titanate-based anti-static ceramic guide and preparation method thereof
By preparing calcium titanate-based antistatic ceramic yarn guides, and combining CaTiO3, TiN, and ZrN, the problems of easy breakage and poor antistatic effect of ceramic yarn guides under high strength were solved, achieving good wear resistance and conductivity, thus meeting the antistatic requirements of textile machinery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- YIXING JIURONG SPECIAL PORCELAIN CO LTD
- Filing Date
- 2023-12-29
- Publication Date
- 2026-06-02
AI Technical Summary
Existing ceramic wire guides are prone to breakage, have poor anti-static effect, and low wire guiding efficiency under high-intensity working conditions. The main reasons are that ceramic materials themselves have a high coefficient of friction, poor conductivity, low fracture toughness, and low mechanical strength.
A ceramic wire guide with good wear resistance, conductivity and antistatic ability was prepared by using calcium titanate-based antistatic ceramic wire guide, combined with CaTiO3, titanium nitride (TiN) and zirconium nitride (ZrN) through wet ball milling, hot isostatic pressing and other steps.
The wear resistance and antistatic properties of ceramic wire guides have been improved, and their mechanical and electrical properties have been enhanced to meet the application requirements in applications requiring antistatic properties.
Smart Images
Figure BDA0004641338760000081
Abstract
Description
Technical Field
[0001] This invention belongs to the field of textile machinery manufacturing technology, specifically relating to a calcium titanate-based antistatic ceramic yarn guide and its preparation method. Background Technology
[0002] In the textile industry, static electricity can adversely affect high-speed spinning yarns, causing them to become tangled and disordered, impacting the quality of textile products and, in severe cases, even leading to static-induced fires. Many components in textile production equipment are made of metal. While traditional metal parts are easy to machine, they have poor wear resistance. Compared to metals, ceramic materials have smaller grain sizes, higher hardness and wear resistance, longer service life, and a high surface finish after processing. They also cause less wear on textile machinery webbing. Therefore, ceramic yarn guides are increasingly widely used in the textile machinery industry.
[0003] Currently, the most common ceramic yarn guides used in textile equipment are made of Al2O3, ZrO2, SrTiO3, and TiO2. These ceramic yarn guides have advantages such as high temperature resistance, corrosion resistance, and good insulation. However, under high-intensity working conditions, ceramic yarn guides often exhibit problems such as easy breakage, poor anti-static effect, and low yarn guiding efficiency. The main reasons are that ceramics themselves have a high coefficient of friction, poor conductivity, low fracture toughness, and low mechanical strength. Summary of the Invention
[0004] The purpose of this invention is to address the above-mentioned technical problems by providing a calcium titanate-based antistatic ceramic wire guide that combines CaTiO3, titanium nitride (TiN), and zirconium nitride (ZrN), exhibiting excellent wear resistance, conductivity, and antistatic capabilities, and can meet the long-term application requirements of ceramic wire guides in applications requiring antistatic properties.
[0005] The calcium titanate-based antistatic ceramic wire guide of the present invention comprises the following components by mass percentage: 72-95% calcium titanate and 5-28% functional additives, wherein the functional additives include titanium nitride and zirconium nitride.
[0006] Calcium titanate (CaTiO3) ceramics have a relatively stable atomic arrangement, good mechanical properties, and certain electrical conductivity. Titanium nitride (TiN) has high hardness and high electrical conductivity, which can effectively improve the electrostatic adsorption capacity and mechanical properties of CaTiO3 ceramics. Zirconium nitride (ZrN) has good wear resistance. The combination of the three can improve the wear resistance and antistatic performance of ceramic wire guides.
[0007] Furthermore, titanium nitride and zirconium nitride account for 2-14% and 3-14% of the mass of the calcium titanate-based antistatic ceramic wire guide, respectively, in the functional additives.
[0008] Furthermore, zirconium nitride is generated by the in-situ reaction of zirconium oxide in a nitrogen atmosphere.
[0009] This invention also provides a method for preparing the above-mentioned calcium titanate-based antistatic ceramic wire guide, comprising the following steps:
[0010] S1: Mix calcium titanate powder, titanium nitride powder and zirconium oxide powder with an organic matrix, granulate to obtain injection granules, and injection mold to obtain a ceramic wire guide blank containing an organic matrix;
[0011] S2: The ceramic wire guide blank is thermally degreased and then reacted at high temperature under a nitrogen atmosphere to obtain the sintered ceramic wire guide body;
[0012] S3: Hot isostatic pressing is applied to the sintered body of the ceramic wire guide.
[0013] ZrN was generated by in-situ reaction of low-cost zirconium oxide (ZrO2) with nitrogen, resulting in a calcium titanate-based antistatic ceramic wire guide with uniform particle size, uniform dispersion, and excellent performance containing TiN and ZrN phases.
[0014] Furthermore, in step S1, the particle size of calcium titanate powder and zirconium oxide powder is 0.1–0.5 μm; and / or the particle size of titanium nitride powder is 10–50 nm.
[0015] Furthermore, in step S1, the calcium titanate powder, titanium nitride powder, and zirconium oxide powder are pre-wet ball-milled, then dispersed twice, sieved, and dried to obtain a mixed powder.
[0016] Furthermore, the rotation speed during wet ball milling is 150–200 r / min, and the milling time is 16–24 h.
[0017] Preferably, calcium titanate powder, titanium nitride powder, and zirconium oxide powder are dispersed in alcohol and then wet-milled.
[0018] Preferably, the secondary dispersion is performed by ultrasonic dispersion for 10 to 20 minutes in an ultrasonic instrument with a power of 1500 to 2000 W.
[0019] Wet ball milling can obtain a uniformly mixed slurry of powders. After sieving to remove agglomerated particles, combined with secondary dispersion, a uniformly dispersed mixed powder with a basically consistent particle size is finally obtained.
[0020] Furthermore, in step S1, the mass of the organic matrix is 10-20% of the mass of the mixed powder.
[0021] Preferably, the organic matrix includes, but is not limited to, one or more of polypropylene (PP), high-density polyethylene (HDPE), paraffin wax, polyurethane, and epoxy resin.
[0022] Furthermore, in step S1, the mixing temperature is 160–200℃ and the time is 2–4 hours.
[0023] Furthermore, in step S1, the injection molding temperature is 150–170°C and the injection pressure is 60–70 kg.
[0024] Furthermore, in step S2, the temperature for hot degreasing is 900–1100°C, and the total heating and holding time is 70–80 hours.
[0025] By adding an organic matrix and then removing it through thermal degreasing, the forming effect of ceramic wire guides can be improved, resulting in a denser sintered structure, which helps to improve the mechanical and electrical properties of ceramic wire guides.
[0026] Furthermore, the high-temperature reaction in step S2 is carried out at a temperature of 1300–1400°C for 2–4 hours.
[0027] Preferably, the heating rate of the high-temperature reaction is 1–5 °C / min, and the cooling rate is 2–5 °C / min.
[0028] Furthermore, in step S3, the hot isostatic pressing treatment is carried out at a temperature of 1250–1350°C for 4–6 hours.
[0029] Preferably, the argon pressure inside the hot isostatic pressing furnace is maintained at 100–150 MPa during the hot isostatic pressing process. Hot isostatic pressing can further eliminate internal pores in the ceramic material, thereby improving the mechanical properties of the calcium titanate-based antistatic ceramic wire guide.
[0030] As a preferred option, the sintered body of the ceramic wire guide is subjected to hot isostatic pressing followed by polishing for 25–35 hours to improve its surface smoothness.
[0031] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:
[0032] (1) Using CaTiO3 as the matrix and combining functional additives TiN and ZrN, an antistatic ceramic wire guide with good wear resistance, conductivity and antistatic ability is obtained, which can meet the application of calcium titanate-based antistatic ceramic wire guide in the application of antistatic applications.
[0033] (2) The atomic arrangement of calcium titanate ceramics is relatively stable, and it has good mechanical properties and electrical conductivity. Titanium nitride has high hardness and high electrical conductivity, which can effectively improve the electrostatic adsorption capacity and mechanical properties of CaTiO3 ceramics. Zirconium nitride has good wear resistance. The combination of the three can effectively improve the wear resistance and antistatic performance of ceramic wire guides.
[0034] (3) ZrN and TiN are generated by in-situ reaction of zirconium oxide with nitrogen. TiN can be uniformly distributed in the calcium titanate-based antistatic ceramic wire guide, thereby improving the mechanical properties of the ceramic wire guide.
[0035] (4) The raw material powder is wet ball milled and then dispersed in a secondary manner to obtain a uniformly dispersed mixed powder with a basically consistent particle size, and finally a high-performance calcium titanate-based antistatic ceramic wire guide is obtained.
[0036] (5) Hot isostatic pressing can further eliminate the internal pores of ceramic materials, thereby improving the mechanical properties of calcium titanate-based antistatic ceramic wire guides. Detailed Implementation
[0037] The technical solution of the present invention will be further described and illustrated below through specific embodiments. It should be understood that the specific embodiments described herein are only for the purpose of helping to understand the present invention and are not intended to limit the present invention. Unless otherwise specified, the raw materials used in the embodiments of the present invention are all commonly used raw materials in the art, and the methods used in the embodiments are all conventional methods in the art.
[0038] Example 1
[0039] The preparation method of the calcium titanate-based antistatic ceramic wire guide in this embodiment includes the following steps:
[0040] S1: 9.4 kg of calcium titanate powder (0.4 μm), 0.2 kg of titanium nitride powder (30 nm) and 0.4 kg of zirconium oxide powder (0.15 μm) were dispersed in alcohol and wet ball-milled at 180 r / min for 20 h. Then, they were ultrasonically dispersed in an ultrasonic instrument with a power of 2000 W for 15 min, sieved and dried to obtain mixed powder.
[0041] S2: Mix the powder with PP at 180℃ for 3 hours, granulate to obtain injection granules, and injection mold at 160℃ and 65kg pressure to obtain a ceramic wire guide blank containing PP.
[0042] S3: The ceramic wire guide blank was degreased at 1000℃ for a total of 75h for heating and holding. Then, under a nitrogen atmosphere, it was heated to 1350℃ for 3h for 16h and then cooled to room temperature for 8h to obtain the sintered ceramic wire guide.
[0043] S4: The ceramic wire guide sintered body is subjected to hot isostatic pressing at 1300℃ for 5 hours, with the gas pressure inside the hot isostatic pressing furnace maintained at 125MPa. After vibration polishing for 30 hours, it is ultrasonically cleaned and dried.
[0044] Example 2
[0045] The preparation method of the calcium titanate-based antistatic ceramic wire guide in this embodiment includes the following steps:
[0046] S1: 8.6 kg of calcium titanate powder (0.4 μm), 0.6 kg of titanium nitride powder (30 nm) and 0.8 kg of zirconium oxide powder (0.15 μm) were dispersed in alcohol and wet ball-milled at 170 r / min for 21 h. Then, they were ultrasonically dispersed in an ultrasonic instrument with a power of 2000 W for 16 min, sieved and dried to obtain mixed powder.
[0047] S2: Mix the powder with HDPE at 185℃ for 3 hours, granulate to obtain injection granules, and injection mold at 165℃ and 65kg pressure to obtain a ceramic wire guide blank containing HDPE.
[0048] S3: The ceramic wire guide blank was degreased at 1050℃ for a total of 75h of heating and holding time. Then, under a nitrogen atmosphere, it was heated to 1350℃ for 3h for 16h and then cooled to room temperature for 8h to obtain the sintered ceramic wire guide.
[0049] S4: The ceramic wire guide sintered body is subjected to hot isostatic pressing at 1280℃ for 5 hours, with the gas pressure inside the hot isostatic pressing furnace maintained at 130MPa. After vibration polishing for 30 hours, it is ultrasonically cleaned and dried.
[0050] Example 3
[0051] The preparation method of the calcium titanate-based antistatic ceramic wire guide in this embodiment includes the following steps:
[0052] S1: 7.8 kg of calcium titanate powder (0.4 μm), 1.0 kg of titanium nitride powder (30 nm) and 1.2 kg of zirconium oxide powder (0.15 μm) were dispersed in alcohol and wet ball-milled at 160 r / min for 20 h. Then, they were ultrasonically dispersed in an ultrasonic instrument with a power of 1800 W for 15 min, sieved and dried to obtain mixed powder.
[0053] S2: Mix the powder with PP at 190℃ for 3 hours, granulate to obtain injection granules, and injection mold at 160℃ and 68kg pressure to obtain a ceramic wire guide blank containing PP.
[0054] S3: The ceramic wire guide blank was degreased at 1000℃ for a total of 75h of heating and holding time. Then, under a nitrogen atmosphere, it was heated to 1380℃ for 3h for 16h and then cooled to room temperature for 8h to obtain the sintered ceramic wire guide.
[0055] S4: The ceramic wire guide sintered body is subjected to hot isostatic pressing at 1320℃ for 5 hours, with the gas pressure inside the hot isostatic pressing furnace maintained at 125MPa. After vibration polishing for 30 hours, it is ultrasonically cleaned and dried.
[0056] Example 4
[0057] The preparation method of the calcium titanate-based antistatic ceramic wire guide in this embodiment includes the following steps:
[0058] S1: 7.2 kg of calcium titanate powder (0.4 μm), 1.4 kg of titanium nitride powder (30 nm) and 1.6 kg of zirconium oxide powder (0.15 μm) were dispersed in alcohol and wet ball-milled at 180 r / min for 22 h. Then, they were ultrasonically dispersed in an ultrasonic instrument with a power of 2000 W for 18 min, sieved and dried to obtain mixed powder.
[0059] S2: Mix the powder with PP at 185℃ for 3 hours, granulate to obtain injection granules, and injection mold at 170℃ and 65kg pressure to obtain a ceramic wire guide blank containing PP.
[0060] S3: The ceramic wire guide blank was degreased at 980℃ for a total of 75h for heating and holding. Then, it was heated to 1350℃ and held for 3h for 16h under nitrogen atmosphere. After 8h, it was cooled to room temperature to obtain the sintered ceramic wire guide.
[0061] S4: The ceramic wire guide sintered body is subjected to hot isostatic pressing at 1300℃ for 5 hours, with the gas pressure inside the hot isostatic pressing furnace maintained at 135MPa. After vibration polishing for 30 hours, it is ultrasonically cleaned and dried.
[0062] Example 5
[0063] The difference between this embodiment and Embodiment 2 lies only in step S1: 8.6 kg of calcium titanate powder (0.4 μm), 0.1 kg of titanium nitride powder (30 nm) and 1.3 kg of zirconium oxide powder (0.15 μm) are dispersed in alcohol and wet ball-milled at 170 r / min for 21 h. Then, they are ultrasonically dispersed in an ultrasonic instrument with a power of 2000 W for 16 min, sieved and dried to obtain mixed powder.
[0064] Example 6
[0065] The difference between this embodiment and Example 2 lies only in step S1: 8.2 kg of calcium titanate powder (0.4 μm), 1.5 kg of titanium nitride powder (30 nm) and 0.3 kg of zirconium oxide powder (0.15 μm) are dispersed in alcohol and wet ball-milled at 170 r / min for 21 h. Then, they are ultrasonically dispersed in an ultrasonic instrument with a power of 2000 W for 16 min, sieved and dried to obtain mixed powder.
[0066] Example 7
[0067] The difference between this embodiment and Example 2 lies only in step S1: 8.6 kg of calcium titanate powder (0.4 μm), 1.2 kg of titanium nitride powder (30 nm) and 0.2 kg of zirconium oxide powder (0.15 μm) are dispersed in alcohol and wet ball-milled at 170 r / min for 21 h. Then, they are ultrasonically dispersed in an ultrasonic instrument with a power of 2000 W for 16 min, sieved and dried to obtain mixed powder.
[0068] Example 8
[0069] The difference between this embodiment and Example 2 lies only in step S1: 8.5 kg of calcium titanate powder (0.4 μm), 0.2 kg of titanium nitride powder (30 nm) and 1.5 kg of zirconium oxide powder (0.15 μm) are dispersed in alcohol and wet ball-milled at 170 r / min for 21 h. Then, they are ultrasonically dispersed in an ultrasonic instrument with a power of 2000 W for 16 min, sieved and dried to obtain mixed powder.
[0070] Example 9
[0071] The preparation method of the calcium titanate-based antistatic ceramic wire guide in this embodiment includes the following steps:
[0072] S1: 8.6 kg of calcium titanate powder (0.4 μm), 0.6 kg of titanium nitride powder (30 nm) and 0.8 kg of zirconium oxide powder (0.15 μm) were dispersed in alcohol and wet ball-milled at 170 r / min for 21 h. Then, they were ultrasonically dispersed in an ultrasonic instrument with a power of 2000 W for 16 min, sieved and dried to obtain mixed powder.
[0073] S2: The mixed powder is heated to 1350℃ and held for 3 hours under nitrogen atmosphere for 16 hours, and then cooled to room temperature for 8 hours to obtain the sintered body of ceramic wire guide.
[0074] S3: The ceramic wire guide sintered body is subjected to hot isostatic pressing at 1280℃ for 5 hours, with the gas pressure inside the hot isostatic pressing furnace maintained at 130MPa. After vibration polishing for 30 hours, it is ultrasonically cleaned and dried.
[0075] Example 10
[0076] The difference between this embodiment and embodiment 2 lies only in step S3: the ceramic wire guide blank is hot degreased at 1050℃, and the total heating and holding time is 75h. Then, it is heated to 1350℃ in a vacuum furnace for 16h and held for 3h. After 8h, it is cooled to room temperature to obtain the sintered ceramic wire guide body.
[0077] Example 11
[0078] The only difference between this embodiment and embodiment 2 is step S4: after vibratory polishing of the ceramic wire guide sintered body for 30 hours, it is ultrasonically cleaned and dried.
[0079] Comparative Example 1
[0080] The preparation method of this comparative ceramic guide wire includes the following steps:
[0081] S1: 9.4 kg of calcium titanate powder (0.4 μm) was dispersed in alcohol and wet ball-milled at 180 r / min for 20 h, then ultrasonically dispersed in an ultrasonic instrument with a power of 2000 W for 15 min, sieved and dried;
[0082] S2: Mix the powder obtained in the above steps with PP at 180℃ for 3 hours, granulate to obtain injection granules, and injection mold at 160℃ and 65kg pressure to obtain a ceramic wire guide blank containing PP.
[0083] S3: The ceramic wire guide blank was degreased at 1000℃ for a total of 75h for heating and holding. Then, under a nitrogen atmosphere, it was heated to 1350℃ for 3h for 16h and then cooled to room temperature for 8h to obtain the sintered ceramic wire guide.
[0084] S4: The ceramic wire guide sintered body is subjected to hot isostatic pressing at 1300℃ for 5 hours, with the gas pressure inside the hot isostatic pressing furnace maintained at 125MPa. After vibration polishing for 30 hours, it is ultrasonically cleaned and dried.
[0085] Comparative Example 2
[0086] The preparation method of this comparative ceramic guide wire includes the following steps:
[0087] S1: 9.4 kg of calcium titanate powder (0.4 μm) and 0.2 kg of titanium nitride powder (30 nm) were dispersed in alcohol and wet ball-milled at 180 r / min for 20 h. Then, the mixture was ultrasonically dispersed in an ultrasonic instrument with a power of 2000 W for 15 min, sieved and dried to obtain mixed powder.
[0088] S2: Mix the powder with PP at 180℃ for 3 hours, granulate to obtain injection granules, and injection mold at 160℃ and 65kg pressure to obtain a ceramic wire guide blank containing PP.
[0089] S3: The ceramic wire guide blank was degreased at 1000℃ for a total of 75h for heating and holding. Then, under a nitrogen atmosphere, it was heated to 1350℃ for 3h for 16h and then cooled to room temperature for 8h to obtain the sintered ceramic wire guide.
[0090] S4: The ceramic wire guide sintered body is subjected to hot isostatic pressing at 1300℃ for 5 hours, with the gas pressure inside the hot isostatic pressing furnace maintained at 125MPa. After vibration polishing for 30 hours, it is ultrasonically cleaned and dried.
[0091] Comparative Example 3
[0092] The preparation method of this comparative ceramic guide wire includes the following steps:
[0093] S1: 9.4 kg of calcium titanate powder (0.4 μm) and 0.4 kg of zirconium oxide powder (0.15 μm) were dispersed in alcohol and wet ball milled at 180 r / min for 20 h. Then, the mixture was ultrasonically dispersed in an ultrasonic instrument with a power of 2000 W for 15 min, sieved and dried to obtain mixed powder.
[0094] S2: Mix the powder with PP at 180℃ for 3 hours, granulate to obtain injection granules, and injection mold at 160℃ and 65kg pressure to obtain a ceramic wire guide blank containing PP.
[0095] S3: The ceramic wire guide blank was degreased at 1000℃ for a total of 75h for heating and holding. Then, under a nitrogen atmosphere, it was heated to 1350℃ for 3h for 16h and then cooled to room temperature for 8h to obtain the sintered ceramic wire guide.
[0096] S4: The ceramic wire guide sintered body is subjected to hot isostatic pressing at 1300℃ for 5 hours, with the gas pressure inside the hot isostatic pressing furnace maintained at 125MPa. After vibration polishing for 30 hours, it is ultrasonically cleaned and dried.
[0097] Comparative Example 4
[0098] The only difference between this comparative example and Example 2 is step S1: 9.7 kg of calcium titanate powder (0.4 μm), 0.1 kg of titanium nitride powder (30 nm) and 0.2 kg of zirconium oxide powder (0.15 μm) were dispersed in alcohol and wet ball-milled at 170 r / min for 21 h. Then, they were ultrasonically dispersed in an ultrasonic instrument with a power of 2000 W for 16 min, sieved and dried to obtain mixed powder.
[0099] Comparative Example 5
[0100] The only difference between this comparative example and Example 2 is step S1: 7.0 kg of calcium titanate powder (0.4 μm), 1.5 kg of titanium nitride powder (30 nm) and 1.5 kg of zirconium oxide powder (0.15 μm) were dispersed in alcohol and wet ball-milled at 170 r / min for 21 h. Then, they were ultrasonically dispersed in an ultrasonic instrument with a power of 2000 W for 16 min, sieved and dried to obtain mixed powder.
[0101] Multiple performance tests were conducted on the ceramic wire guides obtained in the above embodiments and comparative examples, and the test results are shown in Table 1.
[0102] Table 1 Performance Data of Ceramic Wire Guide
[0103]
[0104] The calcium titanate-based antistatic ceramic wire guides obtained in Examples 1-4 exhibited excellent mechanical properties, wear resistance, and antistatic properties. In Example 5, the addition of a small amount of titanium nitride powder led to a decrease in the electrostatic adsorption capacity and mechanical properties of the ceramic wire guide, resulting in poor wear resistance. In Example 6, the addition of excessive titanium nitride powder worsened the fracture toughness and mechanical strength of the ceramic wire guide, reducing its machinability. In Example 7, the addition of a small amount of zirconium oxide powder resulted in a ceramic wire guide with less zirconium nitride, reduced sintering densification, and decreased wear resistance. In Example 8, the addition of excessive zirconium oxide powder resulted in a ceramic wire guide with more zirconium nitride and some unreacted zirconium oxide, leading to poor overall performance. In Example 9, the lack of an organic matrix and thermal debinding during the preparation of the ceramic wire guide resulted in poor forming effect, more pores in the sintered body, increased internal defects, and significantly reduced mechanical properties. The mechanical properties and wear resistance of the ceramic wire guide decreased significantly, and the electrical conductivity deteriorated. In Example 10, the ceramic wire guide sintered in a vacuum furnace was obtained without the formation of zirconium nitride. The toughness and strength of the resulting ceramic wire guide decreased, the coefficient of friction increased, and the mechanical properties and wear resistance deteriorated. In Example 11, the ceramic wire guide sintered body was not subjected to hot isostatic pressing treatment, resulting in an increase in internal defects and a deterioration in mechanical properties and wear resistance. In Comparative Example 1, no functional additives were added to the ceramic wire guide; in Comparative Example 2, no titanium nitride was added to the ceramic wire guide; and in Comparative Example 3, no zirconium nitride was introduced. The mechanical properties and wear resistance of the resulting ceramic wire guides were significantly poor. In Comparative Example 4, a small amount of functional additives were added to the ceramic wire guide, resulting in relatively poor mechanical properties and wear resistance. In Comparative Example 5, an excessive amount of functional additives were added to the ceramic wire guide, increasing the sintering difficulty, resulting in an increase in internal defects and poor mechanical properties and wear resistance.
[0105] Finally, it should be noted that the specific embodiments described herein are merely illustrative of the spirit of the invention and are not intended to limit the implementation of the invention. Those skilled in the art can make various modifications or additions to the described embodiments or use similar methods to replace them; it is neither necessary nor possible to exemplify all embodiments here. However, these obvious variations or modifications derived from the essential spirit of the invention still fall within the scope of protection of the invention, and interpreting them as any additional limitation would contradict the spirit of the invention.
Claims
1. A calcium titanate-based antistatic ceramic wire guide, characterized in that, It is composed of the following components by mass percentage: 72-95% calcium titanate and 5-28% functional additives, wherein the functional additives are titanium nitride and zirconium nitride; In the functional additives, titanium nitride and zirconium nitride account for 2-14% and 3-14% of the mass of calcium titanate-based antistatic ceramic wire guides, respectively; Zirconium nitride is produced by the in-situ reaction of zirconium oxide in a nitrogen atmosphere.
2. A method for preparing a calcium titanate-based antistatic ceramic wire guide as described in claim 1, characterized in that, Includes the following steps: S1: Mix calcium titanate powder, titanium nitride powder and zirconium oxide powder with an organic matrix, granulate to obtain injection granules, and injection mold to obtain a ceramic wire guide blank containing an organic matrix; S2: The ceramic wire guide blank is thermally degreased and then reacted at high temperature under a nitrogen atmosphere to obtain the sintered ceramic wire guide body; S3: Hot isostatic pressing is applied to the sintered body of the ceramic wire guide.
3. The preparation method according to claim 2, characterized in that, In step S1, calcium titanate powder, titanium nitride powder, and zirconium oxide powder are pre-wet ball-milled, sieved, and then dispersed and dried to obtain a mixed powder.
4. The preparation method according to claim 2, characterized in that, In step S1, the mixing temperature is 160~200℃ and the time is 2~4h.
5. The preparation method according to claim 2, characterized in that, In step S1, the injection molding temperature is 150~170℃ and the injection pressure is 60~70kg.
6. The preparation method according to claim 2, characterized in that, In step S2, the temperature for hot degreasing is 900~1100℃, and the total heating and holding time is 70~80h.
7. The preparation method according to claim 2, characterized in that, The high-temperature reaction in step S2 is carried out at a temperature of 1300~1400℃ for 2~4 hours.
8. The preparation method according to claim 2, characterized in that, In step S3, the hot isostatic pressing treatment is carried out at a temperature of 1250~1350℃ for 4~6 hours.