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A high-performance environment-friendly silver tin oxide electrical contact material and its preparation method

An electric contact material, silver tin oxide technology, applied in the direction of oxide conductors, contacts, circuits, etc., to achieve the effect of improving anti-welding ability, improving anti-burning performance, and ensuring accuracy and reliability

Active Publication Date: 2019-04-19
佛山市诺普材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult to form the strong bond produced by the internal oxidation method under general conditions using the chemical coating method, the structure is relatively loose, and pores are often inevitably introduced during processing, and the material density is relatively low, resulting in some electrical contact application conditions. Due to the limitations of the chemical coating method and the difficulty in obtaining a suitable formula, the silver tin oxide material produced by the chemical coating method has good processing performance, but its electrical properties can only adapt to low current application conditions

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  • A high-performance environment-friendly silver tin oxide electrical contact material and its preparation method
  • A high-performance environment-friendly silver tin oxide electrical contact material and its preparation method
  • A high-performance environment-friendly silver tin oxide electrical contact material and its preparation method

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preparation example Construction

[0035] The present invention also provides a method for preparing the above-mentioned high-performance environment-friendly silver tin oxide electrical contact material, comprising the following steps:

[0036] (1) Sphericalized micron or submicron tin oxide powders with different particle size distributions are prepared by subjecting nanoscale tin oxide powder raw materials to high temperature treatment at 1000-1400°C;

[0037] (2) After the spheroidized tin oxide powder is subjected to chemical co-precipitation treatment to deposit bismuth hydroxide colloid on the surface, the bismuth hydroxide is dehydrated to form bismuth trioxide, and finally sintered at 1000-1100°C to obtain a bismuth oxide layer. Tin oxide-bismuth oxide composite powders with different particle sizes were obtained;

[0038] The nanoscale tin oxide raw material of the present invention is sintered at different temperatures and high temperatures to obtain spherical tin oxide powders with different particl...

Embodiment 1

[0051] A high-performance environment-friendly silver tin oxide electrical contact material, which is composed of silver, tin oxide, bismuth oxide, and copper oxide, such as figure 1 Shown is the metallographic diagram of the silver tin oxide material prepared in Example 1; wherein the mass content of each component is 87.5% silver, 10.8% tin oxide, 1.4% bismuth oxide, and 0.3% copper oxide. The preparation steps are as follows :

[0052] (1) The pure tin oxide powder raw material at the nanometer level is calcined at a high temperature above 1000°C in an oxygen-rich atmosphere to prepare two kinds of spherical tin oxide powders with D50=0.2 μm and 2 μm, the ratio is 4:6, and the fine powder is as follows: figure 2 shown. In the embodiment of the present invention, the tin oxide powders used in different particle size ranges are selected according to the application conditions and requirements of the electrical contact, and this embodiment is only an example. Then two kind...

Embodiment 2

[0060] A high-performance environment-friendly silver tin oxide electrical contact material, which is composed of silver, tin oxide, bismuth oxide, and tungsten oxide, wherein the mass content of each component is 90% silver, 9% tin oxide, and 0.7% bismuth oxide , 0.3% tungsten oxide, its preparation steps are as follows:

[0061] (1) Two kinds of spheroidized tin oxide powders with D50=0.35 and 2.5 were prepared by calcining the nano-scale tin oxide raw material at a high temperature above 1000°C and in an air atmosphere, and mixed in a mass ratio of 2:8. In the embodiment of the present invention, the tin oxide powders used in different particle size ranges are selected according to the application conditions and requirements of the electrical contact, and this embodiment is only an example. Use pure water to disperse and mix tin oxide powder, deposit bismuth hydroxide colloid on the surface by conventional coating methods, age, dehydrate, and sinter at 1020°C to obtain two ...

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Abstract

The invention discloses a high-performance environment-friendly silver tin oxide electrical contact material and a preparation method thereof. The silver tin oxide electrical contact material is composed of coating powder with a multi-layer structure prepared by a chemical coating method, and the coating powder The multi-layer structure includes a tin oxide core, a bismuth oxide layer coated on the surface of the tin oxide core, a silver layer coated on the surface of the bismuth oxide layer, and a non-ferrous metal oxide layer other than bismuth oxide coated on the surface of the silver layer. The tin oxide core is mainly composed of tin dioxide, the bismuth oxide layer is mainly composed of bismuth trioxide, the silver layer is mainly composed of silver, and the other non-ferrous metal oxide layers are oxidized by other non-ferrous metals except bismuth oxide. composition. The present invention is a silver tin oxide product with a multi-layered structure, which is formed by applying the chemical coating process and redesigning each key link from the raw material to the final product. The product has good processing performance and enhanced electrical performance.

Description

technical field [0001] The invention relates to the field of a class of silver-based electrical contact materials, and more specifically relates to a high-performance environment-friendly silver tin oxide electrical contact material and a preparation method thereof. Background technique [0002] In the research and development process of conventional silver tin oxide contact materials, we focus on the influence of the type and content of additives on the electrical properties of the material, and the research on the impact of the structure and effect of the addition method and timing of the additives on the electrical properties of the material. Due to the low specific gravity, the processability and electrical properties of silver tin oxide materials have been in a state of mutual checks and balances. In very few cases, silver tin oxide with good processability and good electrical properties has been successfully produced and energy-produced. class material. [0003] Throu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H1/0237H01H11/04H01B1/02H01B1/08B22F1/02B22F9/24
CPCH01B1/02H01B1/08H01H1/0237H01H11/048B22F9/24B22F1/17B22F1/16
Inventor 吴礼杰王永业王乃千
Owner 佛山市诺普材料科技有限公司
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