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Thick-film resistor paste suitable for different types of stainless steel substrates

A technology of thick film resistors and resistor paste, which is applied to thick film resistors, conductive materials dispersed in non-conductive inorganic materials, non-adjustable metal resistors, etc., can solve the problem of large resistance value changes, poor reliability, resistance Small change rate stability and other issues, to achieve low resistance change rate, less pollution, and reduce the effect of resistance change rate

Active Publication Date: 2021-11-26
西安宏星电子浆料科技股份有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of large resistance value change and poor reliability of the existing thick-film resistor paste for stainless steel substrates in the process of power-on work, and to provide a thick-film resistor paste suitable for different types of stainless steel substrates. The slurry has the characteristics of small resistance change rate and high stability

Method used

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  • Thick-film resistor paste suitable for different types of stainless steel substrates
  • Thick-film resistor paste suitable for different types of stainless steel substrates
  • Thick-film resistor paste suitable for different types of stainless steel substrates

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, which do not limit the protection scope of the present invention. The protection scope of the present invention is only limited by the claims, and any omission, replacement or modification made by those skilled in the art on the basis of the disclosed embodiments of the present invention will fall within the protection scope of the present invention.

[0017] 1. Preparation of pretreated blue copper powder

[0018] The blue copper block is crushed by a crusher, and then ball milled with a ball mill. The mass ratio of the ball mill ball to the blue copper block is 1:2, and deionized water is added to cover the ball mill ball and the blue copper block, and the ball is milled for 48 hours. The wet slurry is sieved with a 400-mesh sieve, and then dried at 150°C for 24 hours to obtain blue copper powder; mix the blue copper powder and absolute ethanol at a m...

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Abstract

The invention discloses a thick-film resistor paste suitable for different types of stainless steel substrates, the resistor paste comprises the following components in percentage by weight: 35%-50% of noble metal powder, 10%-25% of lead-free glass powder, 5%-15% of an inorganic additive and 17%-30% of an organic carrier, the lead-free glass powder is composed of ZnO, CaO, Al2O3, SiO2 and B2O3, the inorganic additive is composed of pretreated blue glow copper powder, Al2O3 and Bi2O3. The pretreated blue glow copper powder is prepared by crushing blue glow copper blocks and then carrying out ultrasonic treatment, roasting and other processes. According to the resistor paste, the pretreated blue glow copper powder is added to serve as a sintering accelerant, the microstructure and density of a resistor body are greatly improved, the sintering performance and thermal performance of the resistor body are enhanced, and the resistor paste has the advantage of keeping good resistance stability under high voltage and large current on different types of stainless steel substrates.

Description

technical field [0001] The invention belongs to the technical field of resistance slurry, and in particular relates to a thick-film resistance slurry suitable for different types of stainless steel substrates, which is widely used in insulated stainless steel substrates and products processed by thick-film circuit technology. Background technique [0002] In the field of thick film circuit technology, traditional alumina ceramic substrates are prone to fragmentation at higher temperatures. The stainless steel substrate has comprehensive characteristics such as excellent mechanical properties, good thermal properties, easy processing and molding, and potential low cost, and has attracted more and more attention in the field of heating. There are mainly three types of stainless steel substrates on the market: (1) 430 stainless steel substrates, commonly known as stainless iron, contain 15% to 30% Cr, have a body-centered cubic crystal structure, generally do not contain Ni, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/16H01B1/22H01C7/00H01C17/065H01C17/30C03C12/00H05B3/12
CPCH01B1/16H01B1/22H01C7/003H01C17/06513H01C17/06553H01C17/30C03C12/00H05B3/12
Inventor 王顺顺薛韩英党丽萍边甄勇赵敏王博
Owner 西安宏星电子浆料科技股份有限公司
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