A kind of high-temperature sintered conductive silver paste for NTC thermistor and preparation method thereof

A high-temperature sintering, thermistor technology, used in cable/conductor manufacturing, resistors with negative temperature coefficients, conductive materials dispersed in non-conductive inorganic materials, etc. The problems of narrow sintering range and high sintering temperature can achieve the effect of reducing procurement cost and cycle, easy eutectic, and improving electrical conductivity.
CN103165222BActive Publication Date: 2015-10-28SHANGHAI BAOYIN ELECTRONICS MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI BAOYIN ELECTRONICS MATERIALS CO LTD
Publication Date
2015-10-28

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Abstract

The invention relates to high temperature sintering conductive silver paste for a negative temperature coefficient (NTC) thermistor and a preparation method of the high temperature sintering conductive silver paste for the NTC thermistor. The conductive silver paste comprises the following components, by weight: 72 parts to 85 parts of metal silver powder, 1 part to 10 parts of glass powder, 10 parts to 30 parts of organic carriers and 1 part to 10 parts of solvent. The mentioned materials are fully mixed in a blender mixer, and then are dispersed at high speed through a highs-peed dispersion machine, and even slurry is obtained. The slurry is grinded on a three-roller grinder, the fineness degree of the silver paste is controlled under 15 micrometers through the fine adjustment of idler wheels, the viscosity of the silver paste is 30 Pa.S to 50 Pa.S, and lead-free welding-resistance conductive silver paste for electrothermal film quartz glass tube electrical heating elements is prepared. Compared with the prior art, the high temperature sintering conductive silver paste for the NTC thermistor has the advantages of being low in cost, low in sintering temperature, wide in sintering range, strong in adhesive force and the like.
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Description

technical field

[0001] The invention relates to a conductive silver paste, in particular to a high-temperature sintered conductive silver paste for an NTC thermistor and a preparation method thereof. Background technique

[0002] The relatively common components used in temperature sensors, although there are bimetallic thermocouples, thermistors, platinum resistors, temperature-sensitive ferrites, etc., but in the fields of automobiles and household appliances, the most used ones are cheap, NTC thermistor with high precision and good reliability.

[0003] NTC (Positive Temperature Coefficient) thermistor ceramics is a semiconductor ceramic material with a wide range of uses. During the production process, an ohmic electrode layer must be formed on its surface to eliminate the surface barrier of NTC ceramics, so that the electrode layer and the ceramic body Form a good ohmic contact between them, and its various electrical properties can be realized. On top of the ohmic el...

Claims

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