Inner electrode silver paste for inductor and preparation method

Abstract

The invention relates to the technical field of electronic materials for electronic components, and particularly relates to an inner electrode silver paste for an inductor and a preparation method. The inner electrode silver paste comprises the following components in percentage by weight: 35%-60% of crystal silver powder, 15%-40.5% of silver micro powder, 5%-15% of silver oxide powder, 0.01%-0.5% of glass or an inorganic oxide, 1%-5% of ethyl cellulose, 1%-5% of one or more alcoholic solvents, 1%-10% of one or more ester solvents, 0.5%-5% of rosin, wherein the sum of the weight percentages of the components is 100%. The grain diameter of the crystal silver powder is 1.0-3.0 micrometers, and the grain diameter of the silver micro powder is 0.05-0.15 micrometer; the grain diameter of silver oxide is 0.05-0.15 micrometer; and the grain diameter of the glass or inorganic oxide is 0.1-5 micrometers. The silver paste is compactly combined with a porcelain body through glue removing and sintering, and problems of external cracks of the porcelain body and internal cracks of the electrode do not occur. The silver paste is low in resistivity, and an inductance product produced by adopting the silver paste is small in DC resistance RDC.

Description

Technical field [0001] The invention relates to the technical field of electronic materials for electronic components, in particular to an internal electrode silver paste for inductors and a preparation method thereof. Background technique [0002] With the rapid development of electronic information industries such as mobile phones and computers, electronic components are constantly developing towards miniaturization, light weight, high performance, and high reliability. In recent years, with the continuous development and maturity of the domestic technology of multilayer inductors, its consumption and output have shown rapid progress in China. However, while domestic manufacturers of stacked inductors continue to increase their quantities, two problems have been plagued us: one is the quality problem of ceramic body cracking and electrode cracking after firing; a technical problem of high DC resistance RDC, and these two problems All of these problems need to be solved with th...

AI Technical Summary

Problems solved by technology

However, while the domestic manufacturers of stacked inductors are constantly increasing the volume, there are two problems that have been bothering us: one is the quality problem of ceramic body cracking and electrode cracking after firing; one is the technical problem of high DC resistance RDC, and these two problems All these problems need to cooperate with the development of its main raw material---internal electrode silver paste to solve

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