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A kind of ceramic carbon resistance and preparation method thereof

A technology of carbon resistors and ceramics, which is applied in the field of ceramic carbon resistors and its preparation, can solve the problems of difficult control of the chemical composition of bauxite, large resistivity dispersion, and endangering human health, and achieve easy control and small resistivity dispersion , high safety effect

Active Publication Date: 2019-09-03
CHINA XD ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the chemical composition of bauxite involved in the raw materials of "composite ceramic resistance and its production method" is difficult to control; the density of graphite in "a graphite ceramic linear resistance and its production method" is small, and the operation process can directly endanger human health. It is difficult to operate during the process, and the existing ceramic carbon resistors have the problem of large dispersion of resistivity

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  • A kind of ceramic carbon resistance and preparation method thereof

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Effect test

Embodiment 1

[0023] The ceramic carbon resistance of the present invention is made of 30 parts by mass of corundum, 20 parts of mullite, 5 parts of quartz sand, 10 parts of glass powder, 15 parts of organic carbon and 0.5 part of binder Prepared.

[0024] The binder is diatomite; the organic carbon is epoxy resin; the particle size of corundum is 80-500 mesh; the particle size of mullite is 80-500 mesh; the particle size of quartz sand is 100-400 mesh.

[0025] The preparation method of ceramic carbon resistance of the present invention comprises the following steps:

[0026] 1) Weigh corundum, mullite, quartz sand, glass powder, organic carbon and binder, and then mix corundum, mullite, glass powder and quartz sand to obtain mixture A;

[0027] 2) ball milling the mixture A obtained in step 1), adding organic carbon, and then adding a binder after ball milling to obtain mixture B;

[0028] 3) adding pure water to the mixture B obtained in step 3) and then performing pulping to obtain a ...

Embodiment 2

[0035] The ceramic carbon resistance of the present invention is made of 40 parts by mass of corundum, 32 parts of mullite, 10 parts of quartz sand, 15 parts of glass powder, 8 parts of organic carbon and 1 part of binder Prepared.

[0036] The binder is phenolic resin; the organic carbon is pitch; the particle size of corundum is 80-500 mesh; the particle size of mullite is 80-500 mesh; the particle size of quartz sand is 100-400 mesh.

[0037] The preparation method of ceramic carbon resistance of the present invention comprises the following steps:

[0038] 1) Weigh corundum, mullite, quartz sand, glass powder, organic carbon and binder, and then mix corundum, mullite, glass powder and quartz sand to obtain mixture A;

[0039] 2) ball milling the mixture A obtained in step 1), adding organic carbon, and then adding a binder after ball milling to obtain mixture B;

[0040] 3) adding pure water to the mixture B obtained in step 3) and then performing pulping to obtain a slu...

Embodiment 3

[0047] The ceramic carbon resistance of the present invention is by mass parts 75 parts of corundum, 45 parts of mullite, 15 parts of quartz sand, 30 parts of glass powder, 3 parts of organic carbon and 2 parts of binder Prepared.

[0048] The binder is glass powder; the organic carbon is an organic polymer; the particle size of the corundum is 80-500 mesh; the particle size of the mullite is 80-500 mesh; the particle size of the quartz sand is 100-400 mesh.

[0049] The preparation method of ceramic carbon resistance of the present invention comprises the following steps:

[0050] 1) Weigh corundum, mullite, quartz sand, glass powder, organic carbon and binder, and then mix corundum, mullite, glass powder and quartz sand to obtain mixture A;

[0051] 2) ball milling the mixture A obtained in step 1), adding organic carbon, and then adding a binder after ball milling to obtain mixture B;

[0052] 3) adding pure water to the mixture B obtained in step 3) and then performing pul...

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Abstract

The invention discloses a ceramic carbon resistor and a preparing method thereof. The ceramic carbon resistor is prepared from, by mass, 30-70 parts of corundum, 20-45 parts of mullite, 5-15 parts of quartz sand, 10-30 parts of glass dust, 3-15 parts of organic carbon and 0.5-2 parts of binder. The ceramic carbon resistor has the advantages of being tolerant to large currents, tolerant to impacts, excellent in high-energy absorption, and small in electrical resistivity dispersity; meanwhile, the preparing method is simple in technology, high in safety, and having little harm on human body.

Description

technical field [0001] The invention belongs to the technical field of power electronics and power transmission and transformation, and relates to a ceramic carbon resistor and a preparation method thereof. Background technique [0002] The closing of the circuit breaker in the UHV transmission system is one of the most common operations. The closing of the circuit breaker will generate a closing overvoltage. Ceramic conductive composite materials are developing rapidly, with large capacity flow, stable resistance and thermal Good stability and other characteristics, so ceramic carbon resistors are one of the important protection components for the safety of ultra-high voltage power transmission and transformation equipment. In ultra-high voltage circuit breakers, parallel large-capacity linear resistors, namely ceramic carbon resistors (also known as closing resistors) are generally used. To reduce the operating overvoltage level. [0003] Chinese Patent Application No. CN...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/63C04B35/634C04B41/89H01C7/00H01C17/00H01C17/30
Inventor 杨丹谢清云蒙晓记李刚胡小定
Owner CHINA XD ELECTRIC CO LTD
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