CN113035472A - Preparation method of toughened rod-shaped porcelain insulator - Google Patents
Preparation method of toughened rod-shaped porcelain insulator Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
- H01B19/04—Treating the surfaces, e.g. applying coatings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
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- H—ELECTRICITY
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
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- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
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Abstract
The invention discloses a preparation method of a toughness-enhanced rod-shaped porcelain insulator, which belongs to the field of porcelain insulators and comprises the following steps of uniformly mixing raw materials, preparing a blank, glazing and firing to obtain the rod-shaped porcelain insulator, wherein the raw materials comprise the following components in parts by weight: 1-10 parts of modified carbon fiber, 50-60 parts of silicon micropowder, 10-15 parts of carbon powder, 10-15 parts of silicon dioxide, 6-8 parts of ethyl orthosilicate, 3-5 parts of absolute ethyl alcohol, 3-5 parts of purified water and 1.5-2.5 parts of thermoplastic phenolic resin. According to the invention, the modified carbon fiber is added into the raw material, and the carbon fiber has excellent toughness, so that the problem that the porcelain insulator is easy to break can be solved.
Description
Technical Field
The invention relates to the field of porcelain insulators, in particular to a preparation method of a toughness-enhanced rod-type porcelain insulator.
Background
Rod insulators are important components for operation of power stations and substations, and serve to support wires and insulation, and in recent years, accidents caused by breakage of rod insulators are frequent, and thus, improvement thereof is required.
Disclosure of Invention
The invention aims to at least solve one of the technical problems in the prior art and provides a preparation method of a toughness-enhanced rod-type porcelain insulator.
The technical solution of the invention is as follows:
a preparation method of a toughness-enhanced rod-shaped porcelain insulator comprises the following steps of uniformly mixing raw materials, preparing a blank, glazing, and firing to obtain the rod-shaped porcelain insulator, wherein the raw materials comprise the following components in parts by weight: 1-10 parts of modified carbon fiber, 30-50 parts of silicon micropowder, 7-15 parts of carbon powder, 12-15 parts of silicon dioxide, 6-9 parts of ethyl orthosilicate, 3-7 parts of absolute ethyl alcohol, 3-9 parts of purified water and 1.5-3 parts of thermoplastic phenolic resin.
Preferably, the preparation method of the modified carbon fiber comprises the following steps: and adding the carbon fiber of the first length section and the carbon fiber of the second length section into the polytetrafluoroethylene wax emulsion, ultrasonically stirring, and filtering to obtain the carbon fiber composite material.
Preferably, the length of the carbon fiber of the first length section is 3 to 5 times that of the carbon fiber of the second length section.
Preferably, the modified carbon fiber further comprises the following pretreatment: uniformly stirring modified carbon fibers, polyester type polyurethane prepolymer, isocyanate-terminated polydimethylsiloxane, polyester polyol, organic montmorillonite and curing agent, and curing and molding at the temperature of 80-100 ℃.
Preferably, the preparation method of the organic montmorillonite comprises the following steps: adding montmorillonite into deionized water, and stirring uniformly to obtain a mixed system of montmorillonite and water; dissolving dodecyl dimethylamine hydrochloride in absolute ethyl alcohol, then adding the mixture into a mixed system of the montmorillonite and water, carrying out high-speed stirring for 10-20h at the temperature of 20-40 ℃, carrying out suction filtration, washing a filter cake with deionized water, placing the filter cake at the temperature of 50-60 ℃, carrying out vacuum drying to constant weight, and grinding the filter cake into powder to obtain the organic montmorillonite.
Preferably, the curing agent is one of dimethylthiotoluenediamine, 3 ' -dichloro-4, 4 ' -diaminodiphenylmethane, diethyltoluenediamine, isopropyl 3, 5-diamino-4-chlorophenylacetate, and 4,4 ' -methylenebis (2, 6-diethyl-3-chloroaniline).
Preferably, the firing process is 35-110 ℃ stage 0.2-1h, 110-.
Preferably, the mass ratio of the carbon fibers of the first length section to the carbon fibers of the second length section is 1: 3-8.
The invention has at least one of the following beneficial effects:
(1) according to the preparation method of the toughened rod insulator, the modified carbon fibers are added into the raw materials, and the carbon fibers have excellent toughness, so that the problem that the ceramic insulator is easy to break can be solved.
(2) According to the preparation method of the toughness-enhanced rod-shaped insulator, the carbon fibers are modified, the two types of carbon fibers in length sections are ultrasonically mixed in an organic solution, so that more short carbon fibers are attached to the long carbon fibers to form a carbon fiber group with a dendritic structure, and when the carbon fibers are mixed with raw materials, a support structure with better toughness is arranged in the ceramic insulator after the ceramic insulator is prepared, so that the plastic stress in the ceramic insulator can be well released on the dendritic carbon fiber group after the ceramic insulator is used for a long time, and the toughness of a ceramic material is improved.
(3) According to the preparation method of the toughness-enhanced rod insulator, the modified carbon fibers are mixed into the thermoplastic elastomer, then the mixture is mixed into the ceramic raw material, and the ceramic insulator is prepared by firing.
(4) According to the preparation method of the toughness-enhanced rod insulator, the organic montmorillonite is doped into the thermoplastic elastomer raw material, so that on one hand, the montmorillonite of the inorganic component is favorable for being combined with a porcelain body, and on the other hand, the organic modified component is favorable for the adhesion of the high molecular component of the thermal elastomer among montmorillonite layers, so that the subsequent firing of a porcelain blank is more favorable, and the crystal structure of the porcelain body is more uniform.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
Example 1
A preparation method of a toughness-enhanced rod-shaped porcelain insulator comprises the following steps of uniformly mixing raw materials, preparing a blank, glazing, and firing to obtain the rod-shaped porcelain insulator, wherein the raw materials comprise the following components in parts by weight: 3 parts of modified carbon fiber, 35 parts of silicon micropowder, 7 parts of carbon powder, 14 parts of silicon dioxide, 6 parts of ethyl orthosilicate, 3 parts of absolute ethyl alcohol, 3.5 parts of purified water and 1.5 parts of thermoplastic phenolic resin.
The preparation method of the modified carbon fiber comprises the following steps: and adding the carbon fiber of the first length section and the carbon fiber of the second length section into the polytetrafluoroethylene wax emulsion, ultrasonically stirring, and filtering to obtain the carbon fiber composite material.
Specifically, the length of the carbon fiber of the first length section is 1.2mm, the length of the carbon fiber of the second length section is 0.5mm, the diameters of the carbon fibers of the first length section and the second length section are 23 μm, and the mass ratio of the carbon fiber of the first length section to the carbon fiber of the second length section is 1: 3.
The modified carbon fiber further comprises the following pretreatment: 1 part of modified carbon fiber, 100 parts of polyester type polyurethane prepolymer, 12 parts of isocyanate group terminated polydimethylsiloxane, 11 parts of polyester polyol, 14 parts of organic montmorillonite and 5 parts of curing agent are uniformly stirred and cured and molded at the temperature of 80 ℃. The polyester polyol is obtained by polymerizing phthalic anhydride and dihydric alcohol.
The preparation method of the organic montmorillonite comprises the following steps: adding montmorillonite into deionized water, and stirring uniformly to obtain a mixed system of montmorillonite and water; dissolving dodecyl dimethylamine hydrochloride in absolute ethyl alcohol, then adding the mixture into a mixed system of the montmorillonite and water, stirring at a high speed for 10 hours at the temperature of 20 ℃, then carrying out suction filtration, washing a filter cake with deionized water, placing the filter cake at the temperature of 50 ℃ for vacuum drying to constant weight, and grinding the filter cake into powder to obtain the organic montmorillonite.
The curing agent is dimethyl-sulfur-based toluene diamine.
The sintering process comprises a stage at 35-110 ℃ for 0.5h, a stage at 110-910 ℃ for 3h, a stage at 910-1260 ℃ for 3h, and a stage at 1260-1310 ℃ for 1.5 h.
Example 2
A preparation method of a toughness-enhanced rod-shaped porcelain insulator comprises the following steps of uniformly mixing raw materials, preparing a blank, glazing, and firing to obtain the rod-shaped porcelain insulator, wherein the raw materials comprise the following components in parts by weight: 6 parts of modified carbon fiber, 43 parts of silicon micropowder, 11 parts of carbon powder, 14 parts of silicon dioxide, 7 parts of ethyl orthosilicate, 4 parts of absolute ethyl alcohol, 8 parts of purified water and 2 parts of thermoplastic phenolic resin.
The preparation method of the modified carbon fiber comprises the following steps: and adding the carbon fiber of the first length section and the carbon fiber of the second length section into the polytetrafluoroethylene wax emulsion, ultrasonically stirring, and filtering to obtain the carbon fiber composite material.
Specifically, the length of the carbon fiber of the first length section is 1.2mm, the length of the carbon fiber of the second length section is 0.5mm, the diameters of the carbon fibers of the first length section and the second length section are 23 μm, and the mass ratio of the carbon fiber of the first length section to the carbon fiber of the second length section is 1: 3.
The modified carbon fiber further comprises the following pretreatment: 1 part of modified carbon fiber, 100 parts of polyester type polyurethane prepolymer, 13 parts of isocyanate group terminated polydimethylsiloxane, 12 parts of polyester polyol, 14 parts of organic montmorillonite and 5 parts of curing agent are uniformly stirred and cured and molded at the temperature of 90 ℃. The polyester polyol is obtained by polymerizing phthalic anhydride and dihydric alcohol.
The preparation method of the organic montmorillonite comprises the following steps: adding montmorillonite into deionized water, and stirring uniformly to obtain a mixed system of montmorillonite and water; dissolving dodecyl dimethylamine hydrochloride in absolute ethyl alcohol, then adding the mixture into a mixed system of the montmorillonite and water, stirring at a high speed for 15 hours at the temperature of 40 ℃, then carrying out suction filtration, washing a filter cake by deionized water, placing the filter cake at the temperature of 55 ℃ for vacuum drying to constant weight, and grinding the filter cake into powder to obtain the organic montmorillonite.
The curing agent is bis 3,3 '-dichloro-4, 4' -diaminodiphenylmethane.
The sintering process comprises a stage 1h at 35-110 ℃, a stage 3h at 110-.
Example 3
A preparation method of a toughness-enhanced rod-shaped porcelain insulator comprises the following steps of uniformly mixing raw materials, preparing a blank, glazing, and firing to obtain the rod-shaped porcelain insulator, wherein the raw materials comprise the following components in parts by weight: 10 parts of modified carbon fiber, 50 parts of silicon micropowder, 15 parts of carbon powder, 15 parts of silicon dioxide, 9 parts of ethyl orthosilicate, 7 parts of absolute ethyl alcohol, 9 parts of purified water and 3 parts of thermoplastic phenolic resin.
The preparation method of the modified carbon fiber comprises the following steps: and adding the carbon fiber of the first length section and the carbon fiber of the second length section into the polytetrafluoroethylene wax emulsion, ultrasonically stirring, and filtering to obtain the carbon fiber composite material.
Specifically, the length of the carbon fiber of the first length section is 1.2mm, the length of the carbon fiber of the second length section is 0.5mm, the diameters of the carbon fibers of the first length section and the second length section are 23 micrometers, and the mass ratio of the carbon fiber of the first length section to the carbon fiber of the second length section is 1: 3-8.
The modified carbon fiber further comprises the following pretreatment: 1 part of modified carbon fiber, 100 parts of polyester type polyurethane prepolymer, 12 parts of isocyanate group terminated polydimethylsiloxane, 11 parts of polyester polyol, 14 parts of organic montmorillonite and 5 parts of curing agent are uniformly stirred and cured and molded at the temperature of 100 ℃.
The polyester polyol is obtained by polymerizing phthalic anhydride and dihydric alcohol.
The preparation method of the organic montmorillonite comprises the following steps: adding montmorillonite into deionized water, and stirring uniformly to obtain a mixed system of montmorillonite and water; dissolving dodecyl dimethylamine hydrochloride in absolute ethyl alcohol, then adding the mixture into a mixed system of the montmorillonite and water, stirring at a high speed for 20 hours at 40 ℃, then carrying out suction filtration, washing a filter cake with deionized water, placing the filter cake at 57 ℃, drying in vacuum to constant weight, and grinding into powder to obtain the organic montmorillonite.
The curing agent is 4, 4' -methylene bis (2, 6-diethyl-3-chloroaniline).
The sintering process comprises a stage 1h at 35-110 ℃, a stage 5h at 110-.
Example 4
This example is a modification of example 2, and specifically, the length of the carbon fiber in the first length section is 1.2mm, the length of the carbon fiber in the second length section is 0.4mm, the diameters of the carbon fibers in the first length section and the second length section are 22 μm, and the mass ratio of the carbon fiber in the first length section to the carbon fiber in the second length section is 1: 5.
Example 5
The present embodiment is a modification of embodiment 2, and specifically, the length of the carbon fiber in the first length section is 1.2mm, the length of the carbon fiber in the second length section is 0.3mm, the diameter of the carbon fiber in the first length section and the second length section is 20.2 μm, and the mass ratio of the carbon fiber in the first length section to the carbon fiber in the second length section is 1: 6.
COMPARATIVE EXAMPLE 1 (carbon-free fiber)
A preparation method of a toughness-enhanced rod-shaped porcelain insulator comprises the following steps of uniformly mixing raw materials, preparing a blank, glazing, and firing to obtain the rod-shaped porcelain insulator, wherein the raw materials comprise the following components in parts by weight: 43 parts of silicon micropowder, 11 parts of carbon powder, 14 parts of silicon dioxide, 7 parts of ethyl orthosilicate, 4 parts of absolute ethyl alcohol, 8 parts of purified water and 2 parts of thermoplastic phenolic resin.
The sintering process comprises a stage 1h at 35-110 ℃, a stage 3h at 110-.
Comparative example 2 (carbon fiber without modification)
A preparation method of a toughness-enhanced rod-shaped porcelain insulator comprises the following steps of uniformly mixing raw materials, preparing a blank, glazing, and firing to obtain the rod-shaped porcelain insulator, wherein the raw materials comprise the following components in parts by weight: 6 parts of carbon fiber, 43 parts of silicon micropowder, 11 parts of carbon powder, 14 parts of silicon dioxide, 7 parts of ethyl orthosilicate, 4 parts of absolute ethyl alcohol, 8 parts of purified water and 2 parts of thermoplastic phenolic resin.
The sintering process comprises a stage 1h at 35-110 ℃, a stage 3h at 110-.
Comparative example 3 (carbon fiber does not form an elastomer)
A preparation method of a toughness-enhanced rod-shaped porcelain insulator comprises the following steps of uniformly mixing raw materials, preparing a blank, glazing, and firing to obtain the rod-shaped porcelain insulator, wherein the raw materials comprise the following components in parts by weight: 6 parts of modified carbon fiber, 43 parts of silicon micropowder, 11 parts of carbon powder, 14 parts of silicon dioxide, 7 parts of ethyl orthosilicate, 4 parts of absolute ethyl alcohol, 8 parts of purified water and 2 parts of thermoplastic phenolic resin.
The preparation method of the modified carbon fiber comprises the following steps: and adding the carbon fiber of the first length section and the carbon fiber of the second length section into the polytetrafluoroethylene wax emulsion, ultrasonically stirring, and filtering to obtain the carbon fiber composite material.
Specifically, the length of the carbon fiber of the first length section is 1.2mm, the length of the carbon fiber of the second length section is 0.5mm, the diameters of the carbon fibers of the first length section and the second length section are 23 μm, and the mass ratio of the carbon fiber of the first length section to the carbon fiber of the second length section is 1: 3.
The sintering process comprises a stage 1h at 35-110 ℃, a stage 3h at 110-.
Comparative example 4 (montmorillonite without modification)
A preparation method of a toughness-enhanced rod-shaped porcelain insulator comprises the following steps of uniformly mixing raw materials, preparing a blank, glazing, and firing to obtain the rod-shaped porcelain insulator, wherein the raw materials comprise the following components in parts by weight: 6 parts of modified carbon fiber, 43 parts of silicon micropowder, 11 parts of carbon powder, 14 parts of silicon dioxide, 7 parts of ethyl orthosilicate, 4 parts of absolute ethyl alcohol, 8 parts of purified water and 2 parts of thermoplastic phenolic resin.
The preparation method of the modified carbon fiber comprises the following steps: and adding the carbon fiber of the first length section and the carbon fiber of the second length section into the polytetrafluoroethylene wax emulsion, ultrasonically stirring, and filtering to obtain the carbon fiber composite material.
Specifically, the length of the carbon fiber of the first length section is 1.2mm, the length of the carbon fiber of the second length section is 0.5mm, the diameters of the carbon fibers of the first length section and the second length section are 23 μm, and the mass ratio of the carbon fiber of the first length section to the carbon fiber of the second length section is 1: 3.
The modified carbon fiber further comprises the following pretreatment: 1 part of modified carbon fiber, 100 parts of polyester type polyurethane prepolymer, 13 parts of isocyanate group terminated polydimethylsiloxane, 12 parts of polyester polyol, 14 parts of montmorillonite and 5 parts of curing agent are uniformly stirred and cured and molded at the temperature of 90 ℃. The polyester polyol is obtained by polymerizing phthalic anhydride and dihydric alcohol.
The sintering process comprises a stage 1h at 35-110 ℃, a stage 3h at 110-.
The following performance tests were conducted on the above examples and comparative examples, and the test values are shown in Table 1.
The bending strength is tested by a bending resistance tester, and the fracture toughness is tested by a single-side notched beam method (SENB).
TABLE 1 Performance test values of examples and comparative examples
| Test specimen | Bending strength (Mpa) | Fracture toughness (Mpa) |
| Example 1 | 574 | 45 |
| Example 2 | 576 | 44 |
| Example 3 | 575 | 45 |
| Example 4 | 577 | 46 |
| Example 5 | 574 | 44 |
| Comparative example 1 | 312 | 25 |
| Comparative example 2 | 415 | 31 |
| Comparative example 3 | 466 | 35 |
| Comparative example 4 | 478 | 37 |
As can be seen from the data in the table above, the bending strength and fracture toughness of the samples in the examples are better than those of the comparative examples, wherein the analysis of the comparative example 1 shows that the carbon fiber added in the examples has certain toughness and can absorb the stress in the porcelain body, so that the performance of the porcelain body can be optimized; according to the analysis of the comparative example 2, the embodiment adopts the mixture of the modified carbon fibers, the long fibers and the short fibers, so that the fiber group with the dendritic structure can be formed, and the absorption of crack stress generated by the ceramic insulator in long-term use is facilitated, so that the generation of cracks is reduced, and the strength of the ceramic insulator is greatly improved; according to the analysis of the comparative example 3, the modified carbon fibers are mixed into the elastomer in the embodiment, and the elastomer has better toughness and is combined with the dendritic carbon fiber group, so that the ceramic insulator can absorb stress generated by the crack tip after being used for a long time, the generation of cracks is reduced, and the performance is improved; analysis of comparative example 4 shows that in the examples, by doping the organic montmorillonite in the thermoplastic elastomer raw material, on one hand, the montmorillonite of the inorganic component is beneficial to combination with the porcelain body, and on the other hand, the organic modified component is beneficial to adhesion of the high molecular component of the thermal elastomer between montmorillonite layers, so that the subsequent firing of the porcelain body is more beneficial, the crystal structure of the porcelain body is more uniform, and the performance is improved.
The above additional technical features can be freely combined and used in superposition by those skilled in the art without conflict.
In the description of the embodiments of the present invention, it should be understood that "-" and "-" indicate the same range of two numerical values, and the range includes the endpoints. For example: "A-B" means a range of greater than or equal to A and less than or equal to B. "A to B" means a range of not less than A and not more than B.
In the description of the embodiments of the present invention, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The above description is only a preferred embodiment of the present invention, and the technical solutions that achieve the objects of the present invention by basically the same means are all within the protection scope of the present invention.
Claims (8)
1. A preparation method of a toughening rod type porcelain insulator is characterized by comprising the following steps: uniformly mixing raw materials, preparing a blank, glazing, and sintering to obtain the rod-shaped porcelain insulator, wherein the raw materials comprise the following components in parts by weight: 1-10 parts of modified carbon fiber, 30-50 parts of silicon micropowder, 7-15 parts of carbon powder, 12-15 parts of silicon dioxide, 6-9 parts of ethyl orthosilicate, 3-7 parts of absolute ethyl alcohol, 3-9 parts of purified water and 1.5-3 parts of thermoplastic phenolic resin.
2. The preparation method of the toughening rod-type porcelain insulator according to claim 1, wherein the method comprises the following steps: the preparation method of the modified carbon fiber comprises the following steps: and adding the carbon fiber of the first length section and the carbon fiber of the second length section into the polytetrafluoroethylene wax emulsion, ultrasonically stirring, and filtering to obtain the carbon fiber composite material.
3. The method for preparing the toughening rod-type porcelain insulator according to claim 2, wherein the method comprises the following steps: the length of the carbon fiber of the first length section is 3-5 times of that of the carbon fiber of the second length section.
4. The method for preparing the toughening rod-type porcelain insulator according to claim 2, wherein the method comprises the following steps: the modified carbon fiber further comprises the following pretreatment: uniformly stirring modified carbon fibers, polyester type polyurethane prepolymer, isocyanate-terminated polydimethylsiloxane, polyester polyol, organic montmorillonite and curing agent, and curing and molding at the temperature of 80-100 ℃.
5. The preparation method of the toughening rod-type porcelain insulator according to claim 4, wherein the method comprises the following steps: the preparation method of the organic montmorillonite comprises the following steps: adding montmorillonite into deionized water, and stirring uniformly to obtain a mixed system of montmorillonite and water; dissolving dodecyl dimethylamine hydrochloride in absolute ethyl alcohol, then adding the mixture into a mixed system of the montmorillonite and water, carrying out high-speed stirring for 10-20h at the temperature of 20-40 ℃, carrying out suction filtration, washing a filter cake with deionized water, placing the filter cake at the temperature of 50-60 ℃, carrying out vacuum drying to constant weight, and grinding the filter cake into powder to obtain the organic montmorillonite.
6. The preparation method of the toughening rod-type porcelain insulator according to claim 4, wherein the method comprises the following steps: the curing agent is one of dimethylthiotoluenediamine, 3 ' -dichloro-4, 4 ' -diaminodiphenylmethane, diethyltoluenediamine, 3, 5-diamino-4-chlorobenzeneacetic acid isopropyl ester and 4,4 ' -methylenebis (2, 6-diethyl-3-chloroaniline).
7. The preparation method of the toughening rod-type porcelain insulator according to claim 1, wherein the method comprises the following steps: the sintering process comprises a stage at 35-110 ℃ for 0.2-1h, a stage at 110-910 ℃ for 3-5h, a stage at 910-1260 ℃ for 2-4h, and a stage at 1310-1260 ℃ for 1-2 h.
8. The method for preparing the toughening rod-type porcelain insulator according to claim 2, wherein the method comprises the following steps: the mass ratio of the carbon fiber of the first length section to the carbon fiber of the second length section is 1: 3-8.
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| CN116425515A (en) * | 2023-04-24 | 2023-07-14 | 江西省怡龙电气有限公司 | Toughening rod type porcelain insulator and preparation method thereof |
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