CN113979733A - Manufacturing and processing technology of electric power stay insulator - Google Patents

Manufacturing and processing technology of electric power stay insulator Download PDF

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Publication number
CN113979733A
CN113979733A CN202111353073.5A CN202111353073A CN113979733A CN 113979733 A CN113979733 A CN 113979733A CN 202111353073 A CN202111353073 A CN 202111353073A CN 113979733 A CN113979733 A CN 113979733A
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composite material
modified
parts
calcium carbonate
mixture
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CN113979733B (en
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晏良清
张华�
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Jiangxi Kaijia Electric Porcelain Appliance Co ltd
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Jiangxi Kaijia Electric Porcelain Appliance Co ltd
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Abstract

The invention discloses a manufacturing and processing technology of an electric power stay insulator, which relates to the technical field of insulators and comprises the following steps: weighing the following raw materials: the material comprises Zuoyun soil, bauxite/modified gas phase method white carbon composite material, granite powder, nano boron nitride, mica powder coated modified nano calcium carbonate composite material, lamellar mica, potassium titanate whisker coated lignin fiber and coconut shell fiber composite material, modified bentonite, zinc oxide/silicon rubber composite material and sintering auxiliary agent; premixing materials except the sintering aid to obtain a premix, and then placing the premix into a ball mill to be ball-milled by adding water to obtain a mixture; sieving, removing iron, squeezing mud, aging, vacuum pugging, forming, fettling and drying; pre-burning; crushing the pre-sintered material; and pressing the crushed material and the sintering aid, and sintering the pressed piece. The invention has the advantages of good mechanical property, high strength and the like of the manufactured insulator.

Description

Manufacturing and processing technology of electric power stay insulator
Technical Field
The invention relates to the field of insulators, in particular to a manufacturing and processing technology of an electric power stay insulator.
Background
The insulator is a special insulating control and can play an important role in an overhead transmission line. The insulator is mainly used for telegraph poles, and is gradually developed to hang a plurality of disc-shaped insulators at one end of a high-voltage wire connecting tower, and the insulators are used for increasing creepage distance and are usually made of glass or ceramics, namely insulators. The insulator plays two basic roles in overhead transmission lines, namely supporting the conductor and preventing current from flowing back to the ground, and the two roles must be ensured, the insulator should not fail due to various electromechanical stresses caused by changes in environmental and electrical load conditions, otherwise the insulator cannot play a great role, and the service life of the whole line are damaged. The insulator is arranged on the distribution line stay wire, so that the problem that the stay wire is electrified accidentally can be effectively avoided, and the insulation between the stay wire and the ground is realized. The stay insulator is composed of a porcelain stay insulator and a composite stay insulator.
The insulator provides supporting and insulating functions for the power transmission line, so that the requirements on mechanical strength and insulating strength are high, the natural environment of China is relatively complex, the insulator is mostly used in outdoor or even field environment, and the insulator product is also required to be capable of adapting to complex environmental conditions. The insulator in the prior art has the problems of general mechanical strength performance, easy cracking, mechanical and electrical performance reduction and the like in use, seriously influences the quality stability of products and cannot completely meet the requirement of high-speed power.
Disclosure of Invention
The invention aims to at least solve one of the technical problems in the prior art and provides a manufacturing and processing technology of an electric power stay insulator.
The technical solution of the invention is as follows:
a manufacturing and processing technology of an electric power stay insulator comprises the following steps:
s1, weighing the following raw materials by weight: 12-20 parts of levo-cloud soil, 24-30 parts of bauxite/modified gas-phase white carbon composite material, 2-6 parts of granite powder, 4-8 parts of nano boron nitride, 12-20 parts of mica powder coated modified nano calcium carbonate composite material, 5-11 parts of lamellar mica, 3-7 parts of potassium titanate whisker coated lignin fiber and coconut shell fiber composite material, 1-5 parts of modified bentonite, 2-4 parts of zinc oxide/silicone rubber composite material and 3-7 parts of sintering aid;
s2, premixing the materials except the sintering aid to obtain a premix, and then placing the premix into a ball mill to be ball milled by adding water to obtain a mixture; wherein the mass ratio of the premix to water is 1: 1.1-1.2, and the ball milling time is 10-15 h;
s3, sieving the obtained mixture and removing iron; then sequentially carrying out mud pressing, staleness, vacuum pugging, forming, blank trimming and drying to obtain a blank;
s3, pre-sintering the blank, wherein the pre-sintering temperature is 500-550 ℃, and the heat is preserved for 30-40 min to obtain a pre-sintered material;
s4, transferring the pre-sintered material into a grinding device until the particle size is not more than 1 mu m to obtain a ground material;
s5, placing the crushed material and the sintering aid into a molding press for pressing to obtain a pressed material;
and S6, sintering the pressed material to obtain the sintered porcelain blank.
Preferably, the step S6 includes: heating the pressed material to 860-950 ℃ at a heating rate of 12-15 ℃/min, preserving heat for 50-70 min, heating to 1150-1250 ℃ at a heating rate of 8-13 ℃/min, and preserving heat for 60-80 min; heating to 1550-1650 ℃ at the heating rate of 6-8 ℃/min, and keeping the temperature for 60-80 min; and then cooling to 1350-1450 ℃ at a cooling speed of 3-5 ℃/min, preserving heat for 20-40 min, and then cooling to room temperature along with the furnace to obtain the sintered porcelain blank.
Preferably, in step S1, the preparation method of the zinc oxide/silicone rubber composite material includes: adding zinc oxide with the particle size of 2-10 mu m into silicon rubber, wherein the mass ratio of the zinc oxide to the silicon rubber is 0.3-0.4: 1, the frequency is 200-500 Hz, and the power is 100-200W, and ultrasonically dispersing for 30-60 min.
Preferably, in step S1, the preparation method of the modified bentonite includes: adding 1g of bentonite into 5-10 mL of distilled water, placing the mixture in an ice-water bath condition, adding 0.3-0.4 mL of concentrated hydrochloric acid while stirring, and dripping 1.5-1.8 mL of 1.5mol/L TiCl4Continuing adding 1-1.2 mL of ammonium sulfate solution with the concentration of 1.5mol/L into the solution, mixing and stirring, heating the mixture to 85-88 ℃ in a water bath, and preserving the heat for 30-40 min; then dropwise adding the prepared ammonia water solution until the pH value is 6.5-6.8, filtering, washing, and purifyingDrying at 80 ℃ to obtain the modified bentonite.
Preferably, in the step S1, the preparation method of the bauxite/modified fumed white carbon composite material includes: adding 1 part by mass of modified fumed silica into 10-20 parts by mass of bauxite, uniformly mixing, and then grinding in a grinding machine for 2-3 hours to obtain a mixture; and placing the mixture in a muffle furnace, calcining for 2-3 h at 820-860 ℃, cooling to room temperature along with the furnace, and grinding to obtain the bauxite/modified gas phase method white carbon composite material.
Preferably, the preparation method of the modified fumed silica comprises the following steps: mixing 1g of dried fumed silica with 1-1.5 ml of absolute ethanol, slowly adding 0.05-0.07 ml of vinyltriethoxysilane and 0.06-0.08 ml of diphenyldimethoxysilane, uniformly mixing, adjusting the pH to 7, stirring at a constant temperature of 45-48 ℃ for 10-20 h, removing low molecular substances under vacuum at 100 ℃, cooling to room temperature, centrifuging, and drying under vacuum at 50-60 ℃ to obtain the modified fumed silica;
preferably, the preparation method of the mica powder coated modified nano calcium carbonate composite material comprises the following steps: adding 1 part by mass of modified nano calcium carbonate into 15-25 parts by mass of mica powder, uniformly mixing, and then placing in a grinding machine for grinding for 2-3 hours to obtain a mixture; placing the mixture in a muffle furnace, heating to 280-300 ℃ for calcining for 2-3 h, heating to 800-850 ℃ for calcining for 2-3 h, cooling to room temperature along with the furnace, and grinding to obtain a mica powder coated modified nano calcium carbonate composite material;
preferably, the preparation method of the modified nano calcium carbonate comprises the following steps: dissolving 1g of titanium sulfate in 120-150 ml of distilled water; continuously adding 1g of calcium carbonate, oscillating at room temperature, and performing suction filtration to obtain a product; dissolving 1g of product and 5-6 g of urea in 45-50 g of distilled water, adding 0.001-0.002 g of sodium stearyl sulfate, dropwise adding 10-12 g of titanium sulfate solution under the condition of stirring at 85-95 ℃, continuing to react for 60-80 min after the dropwise adding is finished, cooling, carrying out suction filtration and washing until no precipitate is generated after the filtrate is detected by barium chloride, and drying at 85-90 ℃ for 8-10 h to obtain the modified nano calcium carbonate.
Preferably, the preparation method of the potassium titanate whisker coated lignin fiber and coconut shell fiber composite material comprises the following steps: adding 7-8 g of potassium titanate whisker into 0.07-0.08 g of silane coupling agent for modification treatment, and drying to obtain modified potassium titanate whisker; adding 1-1.4 g of lignin fiber and 1.5-1.9 g of coconut shell fiber composite material into 30-40 ml of ethanol, performing ultrasonic dispersion for 40-60 min, continuously adding the modified potassium titanate whisker, performing ultrasonic dispersion for 30-40 min, and drying to obtain the potassium titanate whisker coated lignin fiber and coconut shell fiber composite material.
Preferably, the sintering aid is prepared by mixing sodium silicate and calcium oxide according to the mass ratio of 1: 0.5-0.6.
The invention has at least one of the following beneficial effects:
according to the invention, when the porcelain insulator is prepared, pre-burning is firstly carried out to preliminarily discharge water in raw materials, and some inorganic and organic matters and carbon elements in a blank are subjected to oxidation reaction or decomposition reaction to form a preliminarily fired insulator piece; and then crushing the materials after the primary sintering so as to enable the materials to be mixed more uniformly, then pressing and sintering, wherein during sintering, the temperature is firstly increased for sintering, the temperature is kept for a period of time, water in the raw materials is further discharged, and the volume of the raw materials is increased by combining the generated shrinkage with the volume increase generated during the crystal form conversion of quartz, so that the volume change of the blank can be relieved. Then, continuously heating and sintering, and preserving heat for a period of time to further sinter the unsintered components so as to relieve the volume change of the blank; continuing to heat and sinter the mixture, and preserving the heat for a period of time to enable the raw materials to continue to sinter and enable all the components to react completely; and then slightly cooling and preserving heat for a period of time to ensure that the prepared porcelain insulator porcelain piece has a compact integral structure and uniform and stable tissue.
The insulator is prepared by using levo-cloud soil, bauxite/modified gas-phase method white carbon composite material, granite powder, nano boron nitride, mica powder coated modified nano calcium carbonate composite material, lamellar mica, potassium titanate whisker coated lignin fiber and coconut fiber composite material, modified bentonite, zinc oxide/silicon rubber composite material and sintering auxiliary agent as raw materials, wherein the insulator is prepared by using the modified gas-phase method white carbon composite materialThe carbon black is dispersed in the bauxite to form the bauxite/modified gas phase method white carbon composite material, so that the modified gas phase method white carbon black is highly dispersed in the blank, and the range of crystal grains can be proper after sintering, the bonding property of the bauxite/modified gas phase method white carbon composite material and other raw materials is improved, and the strength and the hardness of a porcelain piece are effectively improved; meanwhile, the fumed silica is modified, so that the agglomeration of the fumed silica is reduced, and the fumed silica can be uniformly dispersed in other materials. By carrying out surface treatment on the nano calcium carbonate, not only titanium dioxide is formed on the nano calcium carbonate to form a nano calcium carbonate/titanium dioxide composite material, but also the surface modification is carried out on the nano calcium carbonate/titanium dioxide composite material, so that the agglomeration of the composite material is reduced, and the modified nano calcium carbonate is coated on the mica powder, so that the modified nano calcium carbonate can be uniformly dispersed in the mica powder, the bonding property of the nano calcium carbonate/titanium dioxide composite material and other components is enhanced during sintering, and the strength and the weather resistance of a ceramic piece are effectively enhanced. The potassium titanate whisker is modified, so that the dispersibility of the potassium titanate whisker is improved, and the lignin fiber and coconut shell fiber composite material are uniformly dispersed in the potassium titanate whisker by coating the modified potassium titanate whisker, so that the lignin fiber and coconut shell fiber composite material coated by the potassium titanate whisker can be finally and uniformly dispersed in other raw materials, and the mechanical strength of an insulator product, the bonding force with a glaze material and the like can be obviously improved; the lamellar mica can be oriented and arranged near the surface of the raw material to form a bricklaying structure and can be burnt with SiO in other raw materials during sintering2The compact hard eutectic ceramic layer is generated, so that the mechanical strength of the insulator can be improved, oxygen can be prevented from entering the insulator, and the flame retardant effect of the insulator is improved. The shrinkage of the insulator matrix material or the firing shrinkage of the product can be counteracted through the expansion effect of the granite powder, so that the insulator has relatively stable high-temperature volume, good thermal shock resistance and better creep resistance. By dispersing zinc oxide in silicone rubber to form zinc oxide/silicone rubber composite material, the tensile strength and bending strength of the insulator can be improved, the mechanical strength is improved, and the shock resistance, shock resistance and prevention are achievedBrittle fracture performance and can obviously improve the nonuniformity of the electric field distribution of the insulator.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples.
Example 1
A manufacturing and processing technology of an electric power stay insulator comprises the following steps:
s1, weighing the following raw materials by weight: 12 parts of Zuoyun soil, 24 parts of bauxite/modified gas phase method white carbon composite material, 2 parts of granite powder, 4 parts of nano boron nitride, 12 parts of mica powder coated modified nano calcium carbonate composite material, 5 parts of lamellar mica, 3 parts of potassium titanate whisker coated lignin fiber and coconut shell fiber composite material, 1 part of modified bentonite, 2 parts of zinc oxide/silicon rubber composite material and 3 parts of sintering aid;
the preparation method of the zinc oxide/silicone rubber composite material comprises the following steps: adding zinc oxide with the particle size of 2-10 mu m into the silicon rubber, wherein the mass ratio of the zinc oxide to the silicon rubber is 0.3:1, and ultrasonically dispersing for 60min at the frequency of 200Hz and the power of 100W.
The preparation method of the modified bentonite comprises the following steps: adding 1g of bentonite into 5mL of distilled water, placing the mixture in an ice-water bath condition, adding 0.3mL of concentrated hydrochloric acid while stirring, and dripping 1.5mL of 1.5mol/L TiCl4Continuing adding 1mL of ammonium sulfate solution with the concentration of 1.5mol/L, mixing and stirring, heating the mixture to 85 ℃ in a water bath, and preserving the temperature for 30 min; then dropwise adding the prepared ammonia water solution until the pH value is 6.5, filtering, washing and drying at the temperature of 80 ℃ to obtain the modified bentonite.
The preparation method of the bauxite/modified gas phase method white carbon composite material comprises the following steps: adding 1 part of modified fumed silica into 10 parts of bauxite, uniformly mixing, and then grinding in a grinding machine for 2 hours to obtain a mixture; and placing the mixture in a muffle furnace, calcining for 2h at 820 ℃, cooling to room temperature along with the furnace, and grinding to obtain the bauxite/modified gas-phase white carbon composite material.
The preparation method of the modified fumed silica comprises the following steps: mixing 1g of dried fumed silica with 1ml of absolute ethanol, slowly adding 0.05ml of vinyltriethoxysilane and 0.06ml of diphenyldimethoxysilane, uniformly mixing, adjusting the pH to 7, stirring at the constant temperature of 45 ℃ for 20 hours, removing low molecular substances under vacuum at 100 ℃, cooling to room temperature, centrifuging, and drying under vacuum at 50 ℃ to obtain the modified fumed silica;
the preparation method of the mica powder coated modified nano calcium carbonate composite material comprises the following steps: adding 1 part by mass of modified nano calcium carbonate into 15 parts by mass of mica powder, uniformly mixing, and then placing in a grinding machine for grinding for 2 hours to obtain a mixture; placing the mixture in a muffle furnace, heating to 280 ℃ for calcining for 2h, heating to 800 ℃ for calcining for 2h, cooling to room temperature along with the furnace, and grinding to obtain a mica powder coated modified nano calcium carbonate composite material;
the preparation method of the modified nano calcium carbonate comprises the following steps: dissolving 1g of titanium sulfate in 120ml of distilled water; continuously adding 1g of calcium carbonate, oscillating at room temperature, and performing suction filtration to obtain a product; dissolving 1g of product and 5g of urea in 45g of distilled water, adding 0.001g of sodium stearyl sulfate, dropwise adding 10g of titanium sulfate solution under the condition of stirring at 85 ℃, continuing to react for 60min after dropwise addition, cooling, carrying out suction filtration, washing until no precipitate is generated after the filtrate is detected by barium chloride, and drying at 85 ℃ for 8h to obtain the modified nano calcium carbonate.
The preparation method of the potassium titanate whisker coated lignin fiber and coconut shell fiber composite material comprises the following steps: adding 7g of potassium titanate whisker into 0.07g of silane coupling agent for modification treatment, and drying to obtain modified potassium titanate whisker; adding 1g of lignin fiber and 1.5g of coconut shell fiber composite material into 30ml of ethanol, performing ultrasonic dispersion for 40min, continuously adding the modified potassium titanate whisker, performing ultrasonic dispersion for 30min, and drying to obtain the potassium titanate whisker-coated lignin fiber and coconut shell fiber composite material.
Wherein the sintering aid is prepared by mixing sodium silicate and calcium oxide according to the mass ratio of 1: 0.5.
S2, premixing the materials except the sintering aid to obtain a premix, and then placing the premix into a ball mill to be ball milled by adding water to obtain a mixture; wherein the mass ratio of the premix to the water is 1:1.1, and the ball milling time is 10 h;
s3, sieving the obtained mixture and removing iron; then sequentially carrying out mud pressing, staleness, vacuum pugging, forming, blank trimming and drying to obtain a blank;
s3, pre-sintering the blank, wherein the pre-sintering temperature is 500 ℃, and the heat preservation time is 40min, so as to obtain a pre-sintered material;
s4, transferring the pre-sintered material into a grinding device until the particle size is not more than 1 mu m to obtain a ground material;
s5, placing the crushed material and the sintering aid into a molding press for pressing to obtain a pressed material;
s6, heating the pressed material to 860 ℃ at a heating rate of 12 ℃/min, preserving heat for 50min, heating to 1150 ℃ at a heating rate of 8 ℃/min, and preserving heat for 60 min; then heating to 1550 ℃ at the heating rate of 6 ℃/min, and preserving heat for 60 min; then cooling to 1350 ℃ at the cooling rate of 3 ℃/min, preserving heat for 20min, and then cooling to room temperature along with the furnace to obtain the sintered porcelain blank.
Example 2
A manufacturing and processing technology of an electric power stay insulator comprises the following steps:
s1, weighing the following raw materials by weight: 14 parts of Zuoyun soil, 26 parts of bauxite/modified gas phase method white carbon composite material, 3 parts of granite powder, 5 parts of nano boron nitride, 14 parts of mica powder coated modified nano calcium carbonate composite material, 6 parts of lamellar mica, 4 parts of potassium titanate whisker coated lignin fiber and coconut shell fiber composite material, 2 parts of modified bentonite, 2.5 parts of zinc oxide/silicon rubber composite material and 4 parts of sintering aid;
the preparation method of the zinc oxide/silicone rubber composite material comprises the following steps: adding zinc oxide with the particle size of 2-10 mu m into the silicon rubber, wherein the mass ratio of the zinc oxide to the silicon rubber is 0.3:1, and performing ultrasonic dispersion for 30-60 min at the frequency of 300Hz and the power of 120.
The preparation method of the modified bentonite comprises the following steps: adding 1g of bentonite into 6mL of distilled water, placing the mixture in an ice-water bath condition, adding 0.3mL of concentrated hydrochloric acid while stirring, and dripping 1.6mL of 1.5mol/L TiCl4The solution was then further added with 1mL of ammonium sulfate having a concentration of 1.5mol/LMixing and stirring the solution, heating the mixture to 86 ℃ in water bath, and preserving the heat for 30 min; then dropwise adding the prepared ammonia water solution until the pH value is 6.6, filtering, washing and drying at the temperature of 80 ℃ to obtain the modified bentonite.
The preparation method of the bauxite/modified gas phase method white carbon composite material comprises the following steps: adding 1 part by mass of modified fumed silica into 10 parts by mass of bauxite, uniformly mixing, and then grinding in a grinding machine for 2 hours to obtain a mixture; and placing the mixture in a muffle furnace, calcining for 2h at 830 ℃, cooling to room temperature along with the furnace, and grinding to obtain the bauxite/modified gas-phase white carbon composite material.
The preparation method of the modified fumed silica comprises the following steps: mixing 1g of dried fumed silica with 1.2ml of absolute ethanol, slowly adding 0.05ml of vinyltriethoxysilane and 0.07ml of diphenyldimethoxysilane, uniformly mixing, adjusting the pH to 7, stirring at the constant temperature of 46 ℃ for 12 hours, removing low molecular substances under vacuum at 100 ℃, cooling to room temperature, centrifuging, and drying under vacuum at 52 ℃ to obtain the modified fumed silica;
the preparation method of the mica powder coated modified nano calcium carbonate composite material comprises the following steps: adding 1 part by mass of modified nano calcium carbonate into 18 parts by mass of mica powder, uniformly mixing, and then placing in a grinding machine for grinding for 2.5 hours to obtain a mixture; placing the mixture in a muffle furnace, heating to 290 ℃ for calcining for 2.5h, heating to 810 ℃ for calcining for 2.5h, cooling to room temperature along with the furnace, and grinding to obtain a mica powder coated modified nano calcium carbonate composite material;
the preparation method of the modified nano calcium carbonate comprises the following steps: dissolving 1g of titanium sulfate in 130ml of distilled water; continuously adding 1g of calcium carbonate, oscillating at room temperature, and performing suction filtration to obtain a product; dissolving 1g of product and 5g of urea in 45g of distilled water, adding 0.001g of sodium stearyl sulfate, dropwise adding 10.5g of titanium sulfate solution under the condition of stirring at 87 ℃, continuing to react for 65min after the dropwise addition is finished, cooling, carrying out suction filtration and washing until no precipitate is generated after the filtrate is detected by barium chloride, and drying for 8h at 86 ℃ to obtain the modified nano calcium carbonate.
The preparation method of the potassium titanate whisker coated lignin fiber and coconut shell fiber composite material comprises the following steps: adding 7g of potassium titanate whisker into 0.07g of silane coupling agent for modification treatment, and drying to obtain modified potassium titanate whisker; adding 1.1g of lignin fiber and 1.6g of coconut shell fiber composite material into 35ml of ethanol, performing ultrasonic dispersion for 40min, continuously adding the modified potassium titanate whisker, performing ultrasonic dispersion for 30min, and drying to obtain the potassium titanate whisker-coated lignin fiber and coconut shell fiber composite material.
Wherein the sintering aid is prepared by mixing sodium silicate and calcium oxide according to the mass ratio of 1: 0.5.
S2, premixing the materials except the sintering aid to obtain a premix, and then placing the premix into a ball mill to be ball milled by adding water to obtain a mixture; wherein the mass ratio of the premix to the water is 1:1.1, and the ball milling time is 11 h;
s3, sieving the obtained mixture and removing iron; then sequentially carrying out mud pressing, staleness, vacuum pugging, forming, blank trimming and drying to obtain a blank;
s3, pre-sintering the blank, wherein the pre-sintering temperature is 510 ℃, and the temperature is kept for 30min to obtain a pre-sintered material;
s4, transferring the pre-sintered material into a grinding device until the particle size is not more than 1 mu m to obtain a ground material;
s5, placing the crushed material and the sintering aid into a molding press for pressing to obtain a pressed material;
s6, heating the pressed material to 880 ℃ at a heating rate of 13 ℃/min, preserving heat for 55min, heating to 1180 ℃ at a heating rate of 9 ℃/min, and preserving heat for 65 min; heating to 1580 ℃ at the heating rate of 7 ℃/min, and preserving heat for 65 min; then cooling to 1380 ℃ at the cooling rate of 3 ℃/min, preserving the heat for 40min, and then cooling to room temperature along with the furnace to obtain the sintered porcelain blank.
Example 3
A manufacturing and processing technology of an electric power stay insulator comprises the following steps:
s1, weighing the following raw materials by weight: 16 parts of Zuoyun soil, 28 parts of bauxite/modified gas phase method white carbon composite material, 4 parts of granite powder, 6 parts of nano boron nitride, 16 parts of mica powder coated modified nano calcium carbonate composite material, 8 parts of lamellar mica, 5 parts of potassium titanate whisker coated lignin fiber and coconut shell fiber composite material, 3 parts of modified bentonite, 3 parts of zinc oxide/silicon rubber composite material and 5 parts of sintering aid;
the preparation method of the zinc oxide/silicone rubber composite material comprises the following steps: adding zinc oxide with the particle size of 2-10 mu m into silicon rubber, wherein the mass ratio of the zinc oxide to the silicon rubber is 0.35:1, and ultrasonically dispersing for 45min at the frequency of 400Hz and the power of 150W.
The preparation method of the modified bentonite comprises the following steps: adding 1g of bentonite into 8mL of distilled water, placing the mixture in an ice-water bath condition, adding 0.35mL of concentrated hydrochloric acid while stirring, and dripping 1.6mL of 1.5mol/L TiCl4Continuing adding 1.1mL of ammonium sulfate solution with the concentration of 1.5mol/L, mixing and stirring, heating the mixture to 86 ℃ in a water bath, and preserving the heat for 35 min; then dropwise adding the prepared ammonia water solution until the pH value is 6.7, filtering, washing and drying at the temperature of 80 ℃ to obtain the modified bentonite.
The preparation method of the bauxite/modified gas phase method white carbon composite material comprises the following steps: adding 1 part by mass of modified fumed silica into 15 parts by mass of bauxite, uniformly mixing, and then grinding in a grinding machine for 2.5 hours to obtain a mixture; and placing the mixture in a muffle furnace, calcining for 2.5h at 840 ℃, cooling to room temperature along with the furnace, and grinding to obtain the bauxite/modified gas-phase white carbon composite material.
The preparation method of the modified fumed silica comprises the following steps: mixing 1g of dried fumed silica with 1.2ml of absolute ethanol, slowly adding 0.06ml of vinyltriethoxysilane and 0.07ml of diphenyldimethoxysilane, uniformly mixing, adjusting the pH to 7, stirring at the constant temperature of 47 ℃ for 15h, removing low molecular substances under vacuum at 100 ℃, cooling to room temperature, centrifuging, and drying under vacuum at 55 ℃ to obtain the modified fumed silica;
the preparation method of the mica powder coated modified nano calcium carbonate composite material comprises the following steps: adding 1 part by mass of modified nano calcium carbonate into 20 parts by mass of mica powder, uniformly mixing, and then placing in a grinding machine for grinding for 2.5 hours to obtain a mixture; placing the mixture in a muffle furnace, heating to 290 ℃ for calcining for 2.5h, heating to 830 ℃ for calcining for 2.5h, cooling to room temperature along with the furnace, and grinding to obtain a mica powder coated modified nano calcium carbonate composite material;
the preparation method of the modified nano calcium carbonate comprises the following steps: dissolving 1g of titanium sulfate in 120-150 ml of distilled water; continuously adding 1g of calcium carbonate, oscillating at room temperature, and performing suction filtration to obtain a product; dissolving 1g of product and 5.5g of urea in 48g of distilled water, adding 0.0015g of sodium stearyl sulfate, dropwise adding 11g of titanium sulfate solution under the condition of stirring at 90 ℃, continuing to react for 70min after the dropwise addition is finished, cooling, carrying out suction filtration and washing until no precipitate is generated after the filtrate is detected by barium chloride, and drying at 87 ℃ for 9h to obtain the modified nano calcium carbonate.
The preparation method of the potassium titanate whisker coated lignin fiber and coconut shell fiber composite material comprises the following steps: adding 7.5g of potassium titanate whisker into 0.075g of silane coupling agent for modification treatment, and drying to obtain modified potassium titanate whisker; adding 1.2g of lignin fiber and 1.7g of coconut shell fiber composite material into 35ml of ethanol, performing ultrasonic dispersion for 50min, continuously adding the modified potassium titanate whisker, performing ultrasonic dispersion for 35min, and drying to obtain the potassium titanate whisker-coated lignin fiber and coconut shell fiber composite material.
Wherein the sintering aid is prepared by mixing sodium silicate and calcium oxide according to the mass ratio of 1: 0.55.
S2, premixing the materials except the sintering aid to obtain a premix, and then placing the premix into a ball mill to be ball milled by adding water to obtain a mixture; wherein the mass ratio of the premix to the water is 1:1.1, and the ball milling time is 13 h;
s3, sieving the obtained mixture and removing iron; then sequentially carrying out mud pressing, staleness, vacuum pugging, forming, blank trimming and drying to obtain a blank;
s3, pre-sintering the blank, wherein the pre-sintering temperature is 530 ℃, and the temperature is kept for 35min to obtain a pre-sintered material;
s4, transferring the pre-sintered material into a grinding device until the particle size is not more than 1 mu m to obtain a ground material;
s5, placing the crushed material and the sintering aid into a molding press for pressing to obtain a pressed material;
s6, heating the pressed material to 900 ℃ at a heating rate of 14 ℃/min, preserving heat for 60min, heating to 1200 ℃ at a heating rate of 10 ℃/min, and preserving heat for 70 min; heating to 1600 deg.C at a heating rate of 7 deg.C/min, and maintaining for 70 min; then cooling to 1400 ℃ at the cooling rate of 4 ℃/min, preserving the heat for 30min, and then cooling to room temperature along with the furnace to obtain the sintered porcelain blank.
Example 4
A manufacturing and processing technology of an electric power stay insulator comprises the following steps:
s1, weighing the following raw materials by weight: 18 parts of Zuoyun soil, 28 parts of bauxite/modified gas phase method white carbon composite material, 5 parts of granite powder, 7 parts of nano boron nitride, 18 parts of mica powder coated modified nano calcium carbonate composite material, 10 parts of lamellar mica, 6 parts of potassium titanate whisker coated lignin fiber and coconut shell fiber composite material, 4 parts of modified bentonite, 3.5 parts of zinc oxide/silicon rubber composite material and 6 parts of sintering aid;
the preparation method of the zinc oxide/silicone rubber composite material comprises the following steps: adding zinc oxide with the particle size of 2-10 mu m into silicon rubber, wherein the mass ratio of the zinc oxide to the silicon rubber is 0.4:1, and ultrasonically dispersing for 50min at the frequency of 2400Hz and the power of 200W.
The preparation method of the modified bentonite comprises the following steps: adding 1g of bentonite into 9mL of distilled water, placing the mixture in an ice-water bath condition, adding 0.4mL of concentrated hydrochloric acid while stirring, and dripping 1.8mL of 1.5mol/L TiCl4Continuing adding 1.2mL of ammonium sulfate solution with the concentration of 1.5mol/L, mixing and stirring, heating the mixture to 88 ℃ in a water bath, and preserving the heat for 40 min; then dropwise adding the prepared ammonia water solution until the pH value is 6.8, filtering, washing and drying at the temperature of 80 ℃ to obtain the modified bentonite.
The preparation method of the bauxite/modified gas phase method white carbon composite material comprises the following steps: adding 1 part by mass of modified fumed silica into 18 parts by mass of bauxite, uniformly mixing, and then grinding in a grinding machine for 2.5 hours to obtain a mixture; and placing the mixture in a muffle furnace, calcining for 2.5h at 850 ℃, cooling to room temperature along with the furnace, and grinding to obtain the bauxite/modified gas-phase white carbon composite material.
The preparation method of the modified fumed silica comprises the following steps: mixing 1g of dried fumed silica with 1.4ml of absolute ethanol, slowly adding 0.06ml of vinyltriethoxysilane and 0.06ml of diphenyldimethoxysilane, uniformly mixing, adjusting the pH to 7, stirring at the constant temperature of 47 ℃ for 18h, removing low molecular substances under vacuum at 100 ℃, cooling to room temperature, centrifuging, and drying under vacuum at 58 ℃ to obtain the modified fumed silica;
the preparation method of the mica powder coated modified nano calcium carbonate composite material comprises the following steps: adding 1 part by mass of modified nano calcium carbonate into 22 parts by mass of mica powder, uniformly mixing, and then placing in a grinding machine for grinding for 3 hours to obtain a mixture; placing the mixture in a muffle furnace, heating to 300 ℃ for calcining for 3h, heating to 840 ℃ for calcining for 3h, cooling to room temperature along with the furnace, and grinding to obtain a mica powder coated modified nano calcium carbonate composite material;
the preparation method of the modified nano calcium carbonate comprises the following steps: dissolving 1g of titanium sulfate in 150ml of distilled water; continuously adding 1g of calcium carbonate, oscillating at room temperature, and performing suction filtration to obtain a product; dissolving 1g of product and 6g of urea in 50ml of distilled water, adding 0.002g of sodium stearyl sulfate, dropwise adding a titanium sulfate solution under the stirring condition of 95 ℃, continuing to react for 80min after the dropwise adding is finished, cooling, carrying out suction filtration, washing until no precipitate is generated after the filtrate is detected by barium chloride, and drying for 8h at 90 ℃ to obtain the modified nano calcium carbonate.
The preparation method of the potassium titanate whisker coated lignin fiber and coconut shell fiber composite material comprises the following steps: adding 7g of potassium titanate whisker into 0.08g of silane coupling agent for modification treatment, and drying to obtain modified potassium titanate whisker; adding 1.4g of lignin fiber and 1.5g of coconut shell fiber composite material into 40ml of ethanol, performing ultrasonic dispersion for 60min, continuously adding the modified potassium titanate whisker, performing ultrasonic dispersion for 40min, and drying to obtain the potassium titanate whisker-coated lignin fiber and coconut shell fiber composite material.
Wherein the sintering aid is prepared by mixing sodium silicate and calcium oxide according to the mass ratio of 1: 0.6.
S2, premixing the materials except the sintering aid to obtain a premix, and then placing the premix into a ball mill to be ball milled by adding water to obtain a mixture; wherein the mass ratio of the premix to the water is 1:1.2, and the ball milling time is 15 h;
s3, sieving the obtained mixture and removing iron; then sequentially carrying out mud pressing, staleness, vacuum pugging, forming, blank trimming and drying to obtain a blank;
s3, pre-sintering the blank, wherein the pre-sintering temperature is 550 ℃, and the temperature is kept for 40min to obtain a pre-sintered material;
s4, transferring the pre-sintered material into a grinding device until the particle size is not more than 1 mu m to obtain a ground material;
s5, placing the crushed material and the sintering aid into a molding press for pressing to obtain a pressed material;
s6, heating the pressed material to 920 ℃ at a heating rate of 15 ℃/min, preserving heat for 65min, heating to 1220 ℃ at a heating rate of 12 ℃/min, and preserving heat for 70 min; then heating to 1620 ℃ at the heating rate of 8 ℃/min, and preserving the heat for 70 min; and then cooling to 1420 ℃ at the cooling speed of 4 ℃/min, preserving the heat for 40min, and then cooling to room temperature along with the furnace to obtain the sintered porcelain blank.
Example 5
A manufacturing and processing technology of an electric power stay insulator comprises the following steps:
s1, weighing the following raw materials by weight: 20 parts of Zuoyun soil, 30 parts of bauxite/modified gas phase method white carbon composite material, 6 parts of granite powder, 8 parts of nano boron nitride, 20 parts of mica powder coated modified nano calcium carbonate composite material, 11 parts of lamellar mica, 7 parts of potassium titanate whisker coated lignin fiber and coconut shell fiber composite material, 5 parts of modified bentonite, 4 parts of zinc oxide/silicon rubber composite material and 7 parts of sintering aid;
the preparation method of the zinc oxide/silicone rubber composite material comprises the following steps: adding zinc oxide with the particle size of 10 mu m into the silicon rubber, wherein the mass ratio of the zinc oxide to the silicon rubber is 0.4:1, and ultrasonically dispersing for 60min at the frequency of 500Hz and the power of 200W.
The preparation method of the modified bentonite comprises the following steps: adding 1g of bentonite into 10mL of distilled water, placing the mixture in an ice-water bath condition, adding 0.4mL of concentrated hydrochloric acid while stirring, and dripping 1.8mL of 1.5mol/L TiCl4The solution was then added with 1.2mL of 1.5mol/L ammonium sulfate solutionMixing and stirring, heating the mixture to 88 ℃ in water bath, and keeping the temperature for 40 min; then dropwise adding the prepared ammonia water solution until the pH value is 6.8, filtering, washing and drying at the temperature of 80 ℃ to obtain the modified bentonite.
The preparation method of the bauxite/modified gas phase method white carbon composite material comprises the following steps: adding 1 part by mass of modified fumed silica into 20 parts by mass of bauxite, uniformly mixing, and then grinding in a grinding machine for 3 hours to obtain a mixture; and placing the mixture in a muffle furnace, calcining for 3h at 860 ℃, cooling to room temperature along with the furnace, and grinding to obtain the bauxite/modified gas-phase white carbon composite material.
The preparation method of the modified fumed silica comprises the following steps: mixing 1g of dried fumed silica with 1.5ml of absolute ethanol, slowly adding 0.07ml of vinyl triethoxysilane and 0.08ml of diphenyl dimethoxysilane, uniformly mixing, adjusting the pH to 7, stirring at the constant temperature of 48 ℃ for 20 hours, removing low molecular substances under vacuum at 100 ℃, cooling to room temperature, centrifuging, and drying under vacuum at 60 ℃ to obtain the modified fumed silica;
the preparation method of the mica powder coated modified nano calcium carbonate composite material comprises the following steps: adding 1 part by mass of modified nano calcium carbonate into 25 parts by mass of mica powder, uniformly mixing, and then placing in a grinding machine for grinding for 3 hours to obtain a mixture; placing the mixture in a muffle furnace, heating to 300 ℃ for calcining for 3h, heating to 850 ℃ for calcining for 3h, cooling to room temperature along with the furnace, and grinding to obtain a mica powder coated modified nano calcium carbonate composite material;
the preparation method of the modified nano calcium carbonate comprises the following steps: dissolving 1g of titanium sulfate in 150ml of distilled water; continuously adding 1g of calcium carbonate, oscillating at room temperature, and performing suction filtration to obtain a product; dissolving 1g of product and 6g of urea in 50ml of distilled water, adding 0.002g of sodium stearyl sulfate, dropwise adding 12g of titanium sulfate solution under the condition of stirring at 95 ℃, continuing to react for 80min after the dropwise addition is finished, cooling, carrying out suction filtration, washing until no precipitate is generated after the filtrate is detected by barium chloride, and drying for 10h at 90 ℃ to obtain the modified nano calcium carbonate.
The preparation method of the potassium titanate whisker coated lignin fiber and coconut shell fiber composite material comprises the following steps: adding 8g of potassium titanate whisker into 0.08g of silane coupling agent for modification treatment, and drying to obtain modified potassium titanate whisker; adding 1.4g of lignin fiber and 1.9g of coconut shell fiber composite material into 40ml of ethanol, performing ultrasonic dispersion for 60min, continuously adding the modified potassium titanate whisker, performing ultrasonic dispersion for 40min, and drying to obtain the potassium titanate whisker-coated lignin fiber and coconut shell fiber composite material.
Wherein the sintering aid is prepared by mixing sodium silicate and calcium oxide according to the mass ratio of 1: 0.56.
S2, premixing the materials except the sintering aid to obtain a premix, and then placing the premix into a ball mill to be ball milled by adding water to obtain a mixture; wherein the mass ratio of the premix to the water is 1:1.2, and the ball milling time is 15 h;
s3, sieving the obtained mixture and removing iron; then sequentially carrying out mud pressing, staleness, vacuum pugging, forming, blank trimming and drying to obtain a blank;
s3, pre-sintering the blank, wherein the pre-sintering temperature is 550 ℃, and the temperature is kept for 40min to obtain a pre-sintered material;
s4, transferring the pre-sintered material into a grinding device until the particle size is not more than 1 mu m to obtain a ground material;
s5, placing the crushed material and the sintering aid into a molding press for pressing to obtain a pressed material;
s6, heating the pressed material to 950 ℃ at a heating rate of 15 ℃/min, preserving heat for 70min, heating to 1250 ℃ at a heating rate of 13 ℃/min, and preserving heat for 80 min; then heating to 1650 ℃ at the heating rate of 8 ℃/min, and preserving the heat for 80 min; and then cooling to 1450 ℃ at the cooling speed of 5 ℃/min, preserving the heat for 40min, and then cooling to room temperature along with the furnace to obtain the sintered porcelain blank.
Comparative example 1
The difference from example 1 is that: bauxite/modified gas phase method white carbon composite material, zinc oxide/silicon rubber composite material and modified bentonite are not added in the formula.
Comparative example 2
The difference from example 1 is that: the mica powder coated modified nano calcium carbonate composite material, the potassium titanate whisker coated lignin fiber and coconut fiber composite material and the lamellar mica are not added in the formula.
Comparative example 3
The difference from example 1 is that: the preparation method does not carry out the step S4 and the step S5, and in the step S6, the pre-sintered material is directly heated to 1550 ℃, the temperature is kept for 60min, and then the pre-sintered material is cooled to room temperature along with a furnace, so that the sintered porcelain blank is obtained.
Testing
Finished insulators with the same specification and rated voltage of 10KV are manufactured in examples 1-5 and comparative examples 1-3, 100 finished insulators are randomly selected, and a tensile load test, a rated mechanical load test and a bending load test are performed according to GB/T16927.1-2011, and the qualified rate is recorded. Wherein, the appearance inspection is used for observing whether the surface of the product is flat or not, whether cracks exist or not and the like; the tensile load test, the rated mechanical load test and the bending load test were all performed at an ambient temperature of 20 ℃, and it was checked whether or not they were broken within a certain period of time. Wherein the tensile load test is carried out for 60s at 35 KN; the nominal mechanical load test is 60s at 70 KN; the bending load test was continued at 7KN for 10 s.
The test results are shown in table 1:
TABLE 1
Item 35KN tensile load test 70KN rated mechanical load test 7KN bending load test
Example 1 93% qualified 90% qualified 92% qualified
Example 2 96% qualified 93% qualified 95% qualified
Example 3 97% qualified 95% qualified 95% qualified
Example 4 98% qualified 96% qualified 97% qualified
Example 5 98% qualified 94% pass 94% pass
Comparative example 1 57% qualified 54% qualified 56% qualified
Comparative example 2 61% qualified 57% qualified 55% qualified
Comparative example 3 71% qualified 68% qualified 65% qualified
As can be seen from table 1, the tensile load performance, the mechanical load performance, and the bending load performance of the insulators prepared in examples 1 to 5 all meet the national standards. As can be seen by comparing examples 1 to 5 with comparative examples 1 to 3, the tensile load performance, mechanical load performance and bending load performance of the insulators prepared in examples 1 to 5 are obviously superior to those of comparative example 1 (no bauxite/modified fumed silica composite, no zinc oxide/silicone rubber composite and no modified bentonite are added in the formula), comparative example 2 (no mica powder coated modified nano calcium carbonate composite, no potassium titanate whisker coated lignin fiber, no coconut shell fiber composite and no lamellar mica are added in the formula) and comparative example 3 (the preparation methods are different), thereby indicating whether the bauxite/modified fumed silica composite, the zinc oxide/silicone rubber composite, the modified bentonite, the mica powder coated modified nano calcium carbonate composite, the potassium titanate whisker coated lignin fiber, no coconut shell fiber composite, no sodium titanate whisker coated zinc oxide/silicone rubber composite, no potassium titanate whisker coated lignin fiber composite, no coconut shell fiber composite, no sodium titanate whisker, The mechanical properties of the prepared insulator can be influenced by the lamellar mica and the preparation method, and the mechanical properties of the insulator are improved by selecting the components in proper proportion and adopting the proper preparation method, so that the prepared insulator has high strength.
The above are merely characteristic embodiments of the present invention, and do not limit the scope of the present invention in any way. All technical solutions formed by equivalent exchanges or equivalent substitutions fall within the protection scope of the present invention.

Claims (10)

1. A manufacturing and processing technology of an electric power stay insulator is characterized by comprising the following steps:
s1, weighing the following raw materials by weight: 12-20 parts of levo-cloud soil, 24-30 parts of bauxite/modified gas-phase white carbon composite material, 2-6 parts of granite powder, 4-8 parts of nano boron nitride, 12-20 parts of mica powder coated modified nano calcium carbonate composite material, 5-11 parts of lamellar mica, 3-7 parts of potassium titanate whisker coated lignin fiber and coconut shell fiber composite material, 1-5 parts of modified bentonite, 2-4 parts of zinc oxide/silicone rubber composite material and 3-7 parts of sintering aid;
s2, premixing the materials except the sintering aid to obtain a premix, and then placing the premix into a ball mill to be ball milled by adding water to obtain a mixture; wherein the mass ratio of the premix to water is 1: 1.1-1.2, and the ball milling time is 10-15 h;
s3, sieving the obtained mixture and removing iron; then sequentially carrying out mud pressing, staleness, vacuum pugging, forming, blank trimming and drying to obtain a blank;
s3, pre-sintering the blank, wherein the pre-sintering temperature is 500-550 ℃, and the heat is preserved for 30-40 min to obtain a pre-sintered material;
s4, transferring the pre-sintered material into a grinding device until the particle size is not more than 1 mu m to obtain a ground material;
s5, placing the crushed material and the sintering aid into a molding press for pressing to obtain a pressed material;
and S6, sintering the pressed material to obtain the sintered porcelain blank.
2. The manufacturing process of electrical pull-wire insulator as claimed in claim 1, wherein said step S6 includes: heating the pressed material to 860-950 ℃ at a heating rate of 12-15 ℃/min, preserving heat for 50-70 min, heating to 1150-1250 ℃ at a heating rate of 8-13 ℃/min, and preserving heat for 60-80 min; heating to 1550-1650 ℃ at the heating rate of 6-8 ℃/min, and keeping the temperature for 60-80 min; and then cooling to 1350-1450 ℃ at a cooling speed of 3-5 ℃/min, preserving heat for 20-40 min, and then cooling to room temperature along with the furnace to obtain the sintered porcelain blank.
3. The manufacturing process of the electrical pulling insulator as set forth in claim 1, wherein in the step S1, the preparation method of the zinc oxide/silicone rubber composite material includes: adding zinc oxide with the particle size of 2-10 mu m into silicon rubber, wherein the mass ratio of the zinc oxide to the silicon rubber is 0.3-0.4: 1, the frequency is 200-500 Hz, and the power is 100-200W, and ultrasonically dispersing for 30-60 min.
4. The manufacturing process of the electrical pulling insulator as set forth in claim 1, wherein in the step S1, the preparation method of the modified bentonite includes: adding 1g of bentonite into 5-10 mL of distilled water, placing the mixture in an ice-water bath condition, adding 0.3-0.4 mL of concentrated hydrochloric acid while stirring, and dripping 1.5-1.8 mL of 1.5mol/L TiCl4Continuing adding 1-1.2 mL of ammonium sulfate solution with the concentration of 1.5mol/L into the solution, mixing and stirring, heating the mixture to 85-88 ℃ in a water bath, and preserving the heat for 30-40 min; then dropwise adding the prepared ammonia water solution until the pH value is 6.5-6.8, filtering, washing and drying at 80 ℃ to obtain the modified bentonite.
5. The manufacturing process of electrical power pulling insulator as set forth in claim 1, wherein in step S1, the preparation method of bauxite/modified fumed silica composite material includes: adding 1 part by mass of modified fumed silica into 10-20 parts by mass of bauxite, uniformly mixing, and then grinding in a grinding machine for 2-3 hours to obtain a mixture; and placing the mixture in a muffle furnace, calcining for 2-3 h at 820-860 ℃, cooling to room temperature along with the furnace, and grinding to obtain the bauxite/modified gas phase method white carbon composite material.
6. The manufacturing and processing technology of the electric power stay wire insulator according to claim 5, wherein the preparation method of the modified fumed silica comprises the following steps: and (2) mixing 1g of dried fumed silica with 1-1.5 ml of absolute ethanol, slowly adding 0.05-0.07 ml of vinyltriethoxysilane and 0.06-0.08 ml of diphenyldimethoxysilane, uniformly mixing, adjusting the pH to 7, stirring at a constant temperature of 45-48 ℃ for 10-20 h, removing low molecular substances under vacuum at 100 ℃, cooling to room temperature, centrifuging, and drying under vacuum at 50-60 ℃ to obtain the modified fumed silica.
7. The manufacturing and processing technology of the electric power stay insulator according to claim 1, wherein the preparation method of the mica powder coated modified nano calcium carbonate composite material comprises the following steps: adding 1 part by mass of modified nano calcium carbonate into 15-25 parts by mass of mica powder, uniformly mixing, and then placing in a grinding machine for grinding for 2-3 hours to obtain a mixture; and placing the mixture in a muffle furnace, heating to 280-300 ℃ for calcining for 2-3 h, heating to 800-850 ℃ for calcining for 2-3 h, cooling to room temperature along with the furnace, and grinding to obtain the mica powder coated modified nano calcium carbonate composite material.
8. The manufacturing and processing technology of the electric power stay insulator according to claim 7, wherein the preparation method of the modified nano calcium carbonate comprises the following steps: dissolving 1g of titanium sulfate in 120-150 ml of distilled water; continuously adding 1g of calcium carbonate, oscillating at room temperature, and performing suction filtration to obtain a product; dissolving 1g of product and 5-6 g of urea in 45-50 g of distilled water, adding 0.001-0.002 g of sodium stearyl sulfate, dropwise adding 10-12 g of titanium sulfate solution under the condition of stirring at 85-95 ℃, continuing to react for 60-80 min after the dropwise adding is finished, cooling, carrying out suction filtration and washing until no precipitate is generated after the filtrate is detected by barium chloride, and drying at 85-90 ℃ for 8-10 h to obtain the modified nano calcium carbonate.
9. The manufacturing and processing technology of the electric power stay insulator according to claim 1, wherein the preparation method of the potassium titanate whisker coated lignin fiber and coconut fiber composite material comprises the following steps: adding 7-8 g of potassium titanate whisker into 0.07-0.08 g of silane coupling agent for modification treatment, and drying to obtain modified potassium titanate whisker; adding 1-1.4 g of lignin fiber and 1.5-1.9 g of coconut shell fiber composite material into 30-40 ml of ethanol, performing ultrasonic dispersion for 40-60 min, continuously adding the modified potassium titanate whisker, performing ultrasonic dispersion for 30-40 min, and drying to obtain the potassium titanate whisker coated lignin fiber and coconut shell fiber composite material.
10. The manufacturing and processing technology of the electric power stay insulator according to claim 1, wherein the sintering aid is prepared from sodium silicate and calcium oxide according to a mass ratio of 1: 0.5-0.6 by mixing.
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