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High-wear-resistance type resistance paste

A resistance paste, high wear resistance technology, applied in the direction of resistors, adjustable resistors, circuits, etc., can solve the problems of surface wear of resistors, large changes in resistance value, failure of potentiometers, etc., to achieve stable resistance, The effect of small resistance change rate and wide resistance range

Active Publication Date: 2022-03-01
西安宏星电子浆料科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing resistor paste is applied to the glass glaze trimmer potentiometer. During the use of the potentiometer, the friction of the sliding brush causes the surface of the resistor to wear, the resistance value changes greatly, and the potentiometer fails.

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0016] 1. Preparation of conductive powder: After dissolving ruthenium trichloride hydrate with deionized water, add graphite or carbon black with a particle size of less than 1.0 μm according to the ratio in Table 1, mix evenly, and then add triethanolamine to adjust the pH value to 7~ 8. Continue to stir for 30 minutes, filter the precipitate and dry it at 80°C, then roast it in a muffle furnace at 570°C, and mill it with broken balls until the particle size is 0.7-1.3 μm. Among them, graphite is graphite powder with a purity greater than 99.9% prepared by high-temperature purification method, flotation method, alkali-acid method, hydrofluoric acid method, and chlorination roasting method.

[0017] Table 1 Ingredients ratio and preparation method of conductive powder

[0018]

[0019] At the same time, conduct comparative tests with conductive powders x-13, x-14, and x-15. The preparation methods of conductive powders x-13, x-14, and x-15 are as follows:

[0020] Mix rut...

Embodiment 2

[0037]Embodiment 2 is compared with comparative examples 1 and 2, and the length of the roasting time that illustrates graphite composite ruthenium dioxide can affect the temperature coefficient of resistance, and the 4h roasting that the present invention selects can make resistance paste obtain better temperature coefficient characteristic.

[0038] The comparison between Example 2 and Comparative Examples 3 and 4 shows that the baking atmosphere of graphite composite ruthenium dioxide will change the properties of the conductive phase material, resulting in a significant deterioration in the wear resistance of the resistor paste.

[0039] Embodiment 2 is compared with Comparative Examples 5~8, illustrates that graphite composite ruthenium dioxide must adopt the graphite that high-temperature purification process prepares, and the graphite that other methods prepare is used for composite ruthenium dioxide and is applied in resistance slurry, can not make resistance slurry Ha...

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Abstract

The invention discloses high-wear-resistance type resistance paste which comprises the following components in percentage by mass: 15%-35% of conductive powder, 25%-45% of a glass binding phase, 1%-8% of an additive and 30%-45% of an organic carrier, the conductive powder is graphite composite ruthenium dioxide, and the glass binding phase is lead borosilicate glass powder with the softening temperature of 500-600 DEG C. The resistance paste has the characteristics of stable resistance value, good temperature coefficient and good wear resistance, and can meet the use requirements of glass glaze trimmer potentiometer products.

Description

technical field [0001] The invention belongs to the technical field of resistance paste, and in particular relates to a resistance paste with high wear resistance applied to a glass glaze trimmer potentiometer. Background technique [0002] Thick film resistor paste is a technology-intensive product integrating metallurgy, chemistry, materials, electronic technology, analysis and testing technology and other multi-disciplinary fields. In order to adapt to printing, sintering process requirements and practical application requirements, it must have printability, functional characteristics and process compatibility. The commonly used resistance paste is a paste made by mixing functional phase, binder phase, additives and organic vehicle in a certain proportion. [0003] As the main raw material for the production of glass glaze trimmer potentiometers, resistance paste is required to have stable resistance, good temperature coefficient, and excellent wear resistance, which can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/14H01B1/20H01B1/24H01C10/00H01B1/18
CPCH01B1/14H01B1/18H01B1/20H01B1/24H01C10/00
Inventor 鹿宁高振威王妮张建益王顺顺王博
Owner 西安宏星电子浆料科技股份有限公司
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