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Organic conducting coating and preparation method thereof

A conductive coating and inorganic technology, applied in the field of inorganic conductive coating and its preparation, can solve the problems of high moisture absorption rate, easy thermal aging, high cost, and achieve high current load capacity, strong chemical corrosion performance, and excellent electrical conductivity. Effect

Inactive Publication Date: 2013-04-17
CHENGDU SHENGERJIA SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of blended conductive coatings are: the binder is an organic polymer resin with high moisture absorption rate, unstable electrical conductivity of the coating, poor temperature resistance, and easy thermal aging, which greatly limits the use of blended organic high-density coatings. Commercial Application of Molecularly Conductive Coatings
However, the synthesis process of this kind of conductive polymer resin is very complicated, the cost is too high, and the film resistance of the coating is generally above megohms, and the conductivity is difficult to meet the requirements.
In addition, this type of coating still has serious problems in terms of temperature resistance, humidity resistance, and aging resistance, which makes it difficult to achieve commercialization of the application of intrinsic conductive coatings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Prepare a rectangular ceramic sheet with a length of 120mm, a width of 80mm, and a thickness of 6mm, and set it aside.

[0036] In addition, prepare the conductive coating material of 1000g and make inorganic conductive coating, used formula is as follows:

[0037] Silver powder (≤44μm (325 mesh)) 667

[0038] Silica (≤44μm) 133

[0039] Lead oxide 140

[0040] Boron oxide 30

[0041] Bismuth oxide 20

[0042] Lithium oxide 3

[0043] Thallium oxide 13

[0044] Mix the five ingredients in the above formula except silver powder and silicon dioxide powder, and melt the mixture at 900° C. for 80 minutes. After the obtained mixed material block is cooled, it is crushed, and then ball milled for 48 hours with a ball mill, and sieved with a 44 μm (325 mesh) standard sieve to obtain a powdered inorganic binder of ≤ 44 μm. Silver powder and silicon dioxide powder of the above weight are added thereto. Then, 150 g of a liquid organic vehicle composed of 97.5% by weight o...

Embodiment 2

[0046] Except that the organic vehicle was a solution composed of 95% by weight α-terpineol and 5% by weight ethyl cellulose, the experiment was carried out according to the conditions of Example 1, and the results were basically the same as in Example 1.

[0047] Stability test 1 (storage stability)

[0048] Ten pieces of the two kinds of conductive coating components of the above-mentioned examples 1 and 2 were stored in the humid weather in southern my country for one year, and none of the conductive components were found to absorb moisture or become mildewed. The test results of the resistance value show that the variation of the square conduction value is less than 1%.

[0049] Stability test 2 (thermal stability)

[0050] 10 pieces of each of the above two kinds of conductive coating elements were placed in a small thermostat, and kept at 350° C. for 2400 hours. Then it was taken out from the incubator, and the resistance measurement was performed after it cooled to ro...

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Abstract

The invention discloses an organic conducting coating and a preparation method thereof, wherein the organic conducting coating consists of the following components in parts by weight: 55-70 parts of aluminum powder, 8-20 parts of silicon dioxide, 6-18 parts of lead oxide, 1-5 parts of boric oxide, 1-4 parts of bismuth oxide, 0.1-0.4 part of lithium oxide and 1.3-1.5 parts of thallium oxide. The coating prepared by the method disclosed by the invention has the advantages of high yield, good conductivity and long service life.

Description

technical field [0001] The invention relates to conductive materials, in particular to an inorganic conductive coating and a preparation method thereof. Background technique [0002] So far, the commonly used conductive coatings are divided into the following two categories: (1) blended conductive coatings; (2) intrinsic conductive coatings. Most of the blended conductive coatings use organic polymer resin as the binder. The binder itself is not conductive. After being mixed with conductive powder materials, a network of conductive channels is formed by overlapping the conductive powder particles. The main disadvantages of blended conductive coatings are: the binder is an organic polymer resin with high moisture absorption rate, unstable electrical conductivity of the coating, poor temperature resistance, and easy thermal aging, which greatly limits the use of blended organic high-density coatings. Commercial application of molecularly conductive coatings. Intrinsic conduc...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D7/12C09D5/24
Inventor 张荣斌
Owner CHENGDU SHENGERJIA SCI & TECH
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