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Raw material formula and method for manufacturing high-alumina porcelain insulator

A porcelain insulator, high-aluminum technology, applied in the field of electric porcelain, can solve the problems of insulator micro-crack instability and expansion, affecting service life, etc., and achieve the effects of increasing chemical stability, improving flexural strength, and reducing porosity.

Active Publication Date: 2020-03-27
江西省萍乡市宇翔电瓷制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the action of thermal stress caused by this temperature change, the microcracks in the insulator may also expand unstable, seriously affecting its service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A high-alumina porcelain insulator, comprising the following raw material formula in parts by mass: 35 parts of bauxite, 20 parts of kaolinite, 20 parts of feldspar, 15 parts of mullite, 15 parts of illite, 10 parts of clay, Zuoyun 10 parts of clay, 8 parts of pearl clay, 4 parts of garnet, 5 parts of fumed silica (particle size 20-40nm).

[0051] The preparation method is as follows: mix bauxite, clay, levodolite, and pearl clay, and wet grind to a particle size of 10-20 μm to obtain mud a for use; kaolinite, feldspar, mullite, illite, garnet Mixing and wet grinding to a particle size of 1-5 μm to obtain slurry b for use; mixing slurry a and slurry b, drying until the moisture content is lower than 6%, removing iron, and obtaining slurry for use; mixing white carbon black and methyl silicone resin Mixing, the solid-to-liquid ratio of white carbon black and methyl silicone resin is 1g:0.6ml, add to the slurry and continue to mix evenly, and extrude to obtain a slurry; p...

Embodiment 2

[0053]A high alumina porcelain insulator, comprising the following raw material formula in parts by mass: 40 parts of bauxite, 25 parts of kaolinite, 25 parts of feldspar, 20 parts of mullite, 20 parts of illite, 12 parts of clay, Zuo Yun 12 parts of soil, 10 parts of pearl clay, 5 parts of garnet, and 8 parts of fumed silica (particle size 20-40nm).

[0054] The preparation method is as follows: mix bauxite, clay, levodolite, and pearl clay, and wet grind to a particle size of 10-20 μm to obtain mud a for use; kaolinite, feldspar, mullite, illite, garnet Mixing and wet grinding to a particle size of 1-5 μm to obtain slurry b for use; mixing slurry a and slurry b, drying until the moisture content is lower than 7%, removing iron, and obtaining slurry for use; mixing white carbon black and methyl silicone resin Mixing, the solid-to-liquid ratio of white carbon black and methyl silicone resin is 1g:0.8ml, add it to the slurry and continue to mix evenly, extrude to obtain a slurr...

Embodiment 3

[0056] A high-alumina porcelain insulator, comprising the following raw material formula in parts by mass: 45 parts of bauxite, 30 parts of kaolinite, 30 parts of feldspar, 25 parts of mullite, 25 parts of illite, 15 parts of clay, Zuoyun 15 parts of soil, 12 parts of pearl clay, 6 parts of garnet, 10 parts of fumed silica (particle size 20-40nm).

[0057] The preparation method is as follows: mix bauxite, clay, levodolite, and pearl clay, and wet grind to a particle size of 10-20 μm to obtain mud a for use; kaolinite, feldspar, mullite, illite, garnet Mixing and wet grinding to a particle size of 1-5 μm to obtain slurry b for use; mixing slurry a and slurry b, drying until the moisture content is lower than 8%, removing iron, and obtaining slurry for use; mixing white carbon black and methyl silicone resin Mixing, the solid-to-liquid ratio of white carbon black and methyl silicone resin is 1g:1ml, add to the slurry and continue to mix evenly, and extrude to obtain a slurry; p...

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Abstract

The invention relates to a raw material formula and method for manufacturing a high-alumina porcelain insulator, and belongs to the technical field of electric porcelain. The formula comprises bauxite, kaolinite, feldspar, mullite, illite, clay, Zuoyun soil, nacrite, garnet and white carbon black, and the high-alumina porcelain insulator is prepared by a sintering process comprising the followingsteps: using a plurality of raw materials and adding a small amount of garnet, white carbon black and methyl silicone resin, grinding into powder with two different particle sizes in the preparation process, mixing, heating in stages, cooling and heating again. And the obtained porcelain insulator has excellent mechanical properties and meets the requirements of the field of electroceramics at present.

Description

technical field [0001] The invention relates to a raw material formula and a method for making high-alumina porcelain insulators, belonging to the technical field of electric porcelain. Background technique [0002] Porcelain insulators are an important part of the transformation equipment in power stations and substations. They play the role of supporting wires and insulating them. They are composed of dozens of minerals and are sintered at high temperatures. It contains mullite, corundum, quartz and feldspar, etc. The raw materials are clay minerals, namely clay minerals, including kaolin, mica and quartz. [0003] The working environment of porcelain insulators is very harsh. Affected by many external factors (such as rain and snow, strong wind, ice coating, sun exposure, etc.), the additional stress of insulators is large; in addition, porcelain insulators fired at high temperature are brittle materials with low toughness. If there are microstructural defects inside the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622C04B35/63C04B35/632
CPCC04B35/10C04B35/622C04B35/6303C04B35/632C04B2235/3418C04B2235/3463C04B2235/3472C04B2235/3481C04B2235/349C04B2235/5436C04B2235/602C04B2235/606C04B2235/656C04B2235/6567C04B2235/96
Inventor 苏欢苏映池
Owner 江西省萍乡市宇翔电瓷制造有限公司
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