A low temperature coefficient resistance paste

A low temperature coefficient, resistance paste technology, applied in resistors, resistance manufacturing, circuits, etc., can solve problems such as large difference in resistance temperature coefficient value, large resistance change of resistors, and inability to use high-precision resistors, etc. To meet product performance requirements, the difference between positive and negative temperature coefficients is small, and the effect of solving large temperature coefficients

Active Publication Date: 2022-02-25
西安宏星电子浆料科技股份有限公司
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Problems solved by technology

[0004] Existing thick film resistor pastes are applied to resistors. The resistance value of the resistor will change with the change of temperature, which is generally called the temperature coefficient of resistance. Because the temperature coefficient of resistance is too large or in the process of high and low temperature , the value of the temperature coefficient of resistance varies greatly, which will cause a large change in the resistance value of the resistor product, and cannot be applied to high-precision resistors

Method used

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Embodiment Construction

[0014] 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.

[0015] 1. Selection of conductive powder: the specific surface area of ​​ruthenium dioxide is 25-55m 2 / g, the specific surface area of ​​lead ruthenate is 3~10m 2 / g.

[0016] 2. Preparation of lead borosilicate glass powder: according to the mass percentage of PbO 65%, SiO 2 3%, CaCO 3 9%, Al 2 o 3 3%, B 2 o 3 15%, ZnO 5% Weigh the raw materials, mix all kinds of raw materials evenly, put the obtained mixture in a melting furnace at 1050°C for melting, hold for 2 hours, and water quench the o...

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Abstract

The invention discloses a low-temperature-coefficient resistance paste, which is composed of 20%-35% conductive powder, 25%-45% glass binder phase, 1%-5% Additives, 30% to 45% organic carrier; the conductive powder is at least one of ruthenium dioxide and lead ruthenate, and the glass bonding phase is lead borosilicate glass powder and barium feldspar in a muffle furnace Barium feldspar composite lead-borosilicate glass with a particle size of 0.7-1.3 μm after being kept at 450-500°C for 24 hours. The invention uses barite to modify the lead-borosilicate glass powder, and adjusts the temperature coefficient characteristics of the resistance, so that the resistance paste has the characteristics of small difference between positive and negative temperature coefficients, and can meet the requirements of high-precision resistance products.

Description

technical field [0001] The invention belongs to the technical field of resistance paste, and in particular relates to a resistance paste applied to high-precision resistors with small temperature coefficient and small difference between positive and negative temperature coefficients. 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 kind of paste composed of functional phase, binder phase, additives and organic vehicle, mixed in a certain proportion. [0003] Thick-film resistor paste is used as the raw material for the production of various resistors, and the paste is required to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/14H01B1/20H01B1/06H01B1/08H01C17/065C03C12/00
CPCH01B1/14H01B1/20H01B1/08H01B1/06H01C17/06533H01C17/06513C03C12/00
Inventor 鹿宁吴高鹏高振威马倩张建益兰金鹏
Owner 西安宏星电子浆料科技股份有限公司
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