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High-alumina direct current porcelain insulator and preparation method thereof

A porcelain insulator and high-alumina technology, which is applied in the formulation and preparation of high-alumina DC porcelain insulators, can solve the problem of poor mechanical, electrical and thermal performance of electric porcelain, low mechanical strength, and inability to greatly improve the bending strength of porcelain and other problems, to achieve the effect of easy process control, good mechanical properties and low production cost

Inactive Publication Date: 2012-11-21
JIANGSU SOUTH PORCELAIN INSULATOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional DC porcelain insulators have low mechanical strength, and the effect of glazing on improving the mechanical, electrical and thermal properties of electric porcelain is not good, especially the bending strength of porcelain cannot be greatly improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A high-alumina DC porcelain insulator, comprising the following raw material formula in parts by weight: 12 parts of black clay, 4 parts of high-alumina bauxite, 35 parts of alumina, 6 parts of white clay, 6 parts of potassium feldspar, Jingyang soil 15 parts, 22 parts of fraternity clay.

[0015] During preparation, first weigh the raw materials according to the prepared ratio, add water with 30% of the total weight of the base raw materials to obtain a slurry, then ball mill the slurry for 9 hours, and squeeze the mud after sieving and removing iron to obtain The high-quality mud cake is extruded in a vacuum mud refining machine, and the obtained mud section is then electric shade-dried, and finally formed and dried to obtain a green body; the green body is glazed, fired, and glued to obtain the final product.

[0016] The performance of the high-alumina DC porcelain insulator in this embodiment is as follows:

[0017] Bulk density: 2.83 g / cm 3 ;

[0018] Open poro...

Embodiment 2

[0023] A high-alumina DC porcelain insulator, comprising the following raw material formula in parts by weight: 12 parts of black clay, 5 parts of high-alumina bauxite, 35 parts of alumina, 5 parts of white clay, 7 parts of potassium feldspar, Jingyang soil 16 parts, 20 parts of fraternity clay.

[0024] During preparation, first weigh the raw materials according to the prepared ratio, add water of 30% of the total weight of the base material raw materials to obtain a slurry, then ball mill the slurry for 10 hours, and squeeze the mud after sieving and removing iron to obtain The high-quality mud cake is extruded in a vacuum mud refining machine, and the obtained mud section is then electric shade-dried, and finally formed and dried to obtain a green body; the green body is glazed, fired, and glued to obtain the final product.

[0025] The performance of the high-alumina DC porcelain insulator in this embodiment is as follows:

[0026] Bulk density: 2.84 g / cm 3 ;

[0027] O...

Embodiment 3

[0031] Embodiment 3: It is basically the same as Embodiment 1, except that the raw material formula of the high-alumina DC porcelain insulator is as follows:

[0032] 10 parts of black clay, 1 part of high alumina bauxite, 40 parts of alumina, 9 parts of white clay, 5 parts of potassium feldspar, 10 parts of Jingyang soil, and 25 parts of boai clay.

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Abstract

The invention discloses a high-alumina direct current porcelain insulator. The insulator comprises, by weight, 10-15 parts of smolmitza, 1-5 parts of high-alumina bauxite, 30-40 parts of alumina, 5-10 parts of white plaster, 5-10 parts of potassium feldspar, 10-20 parts of Jinyang soil and 15-25 parts of Bo'ai clay. The porcelain insulator is good in mechanical performance and low in production cost, process control is easy, and the high-alumina bauxite and the smolmitza are used, so that the ball milling time is shortened, the cost is reduced and the process performance is improved. According to the insulator, 5-10% of low-sodium potassium feldspar is introduced, and the Na content in chemical components of a semifinished product is less than 0.2%, so that the insulator breakage caused by local swelling stress generated during migration of alkali metal sodium ions in an electrical porcelain material can be prevented, and simultaneously, the problems that the insulator is broken down under the long-term action of a direct current field due to the fact that electric fields are not distributed evenly caused by conducting layers of different specific resistance, which are formed inside a porcelain part during ion migration, can be solved.

Description

technical field [0001] The invention belongs to the technical field of electric porcelain, and in particular relates to a high-alumina DC porcelain insulator formula and a preparation method thereof. Background technique [0002] Electric porcelain billet refers to a mixture of clay raw materials, flux raw materials and other raw materials (quartz, high alumina raw materials or other mineral raw materials) in a certain proportion, which is ground and mixed into mud for billet making. The mud is simply referred to as billet. [0003] When determining the ratio of various raw materials, it must be ensured that the blank can meet the technical performance required by the electric porcelain production process and the physical performance requirements of the fired porcelain. The technological performance of the billet before firing only depends on the quality and amount of the clay raw material, while the firing process of the billet mainly depends on the flux raw material. [...

Claims

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Application Information

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IPC IPC(8): C04B33/13
Inventor 朱文浩刘少华董显林王根水黄蕴君罗杰仲伯煊
Owner JIANGSU SOUTH PORCELAIN INSULATOR CO LTD
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