Preparation method of laminated slice type PTC heat sensitive resistor

A thermistor and lamination technology, applied in the direction of resistors with positive temperature coefficient, etc., can solve the problem that it is difficult to make good contact between the electrode and the ceramic sheet, the thickness of the chip PTC element should not be too thin, and the flatness of the ceramic sheet is difficult. Guarantee and other issues, to avoid the flatness of the tile, the uniformity of the BaTiO3 semiconducting ceramic water slurry, the uniformity of the PTC ceramic body and the sintered body
CN1479325AInactive Publication Date: 2004-03-03深圳市伟林高科技股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
深圳市伟林高科技股份有限公司
Publication Date
2004-03-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The method includes following steps. Preparing superfine PTC powder of BaTiO3, preparing water slurry ceramics of BaTiO3, club-shaped PTC unburned base by using gel injection mold, sintering unburned base obtains club-shaped PTC porcelain, cutting porcelain to piece, laminating the pieces as well as burning and filtering of pole. Comparing with prior art, the invention using 'sintering-cutting-laminating' technique possesses advantages of good flatness, high reliability and high PTC effect.
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Description

technical field

[0001] The invention belongs to the technical field of ceramic materials, and in particular relates to a preparation method of a laminated chip PTC thermistor. Background technique

[0002] Since the PTC thermistor is using BaTiO 3 The grain boundary characteristics of semiconducting ceramics, the PTC effect must be sintered in an oxidizing atmosphere, that is to say, the performance of the PTC thermistor depends on the electrical structure state formed by the oxidation of the grain boundary. Without sufficient oxidation, it is impossible to obtain high performance of PTC thermistor components. In order to prevent the oxidation of the metal electrodes when the laminated chip PTC thermistor is prepared by the traditional integral co-firing method of multilayer capacitors, a reducing atmosphere must be used for sintering, which is seriously contrary to the firing process of PTC materials. The internal electrode used in the chip-type laminated PTC thermistor p...

Claims

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