Ceramic material as well as preparation method and application thereof

A technology of ceramic materials and ceramic slurry, which is applied in the direction of electrical components, fixed capacitor dielectrics, circuits, etc., can solve the problems of multilayer ceramic capacitors such as reduced cost and processing difficulty, weak strength, etc., to promote sintering, improve compactness, and improve The effect of flexural strength

Active Publication Date: 2021-09-07
CHAOZHOU THREE CIRCLE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a ceramic material and its preparation method and application, by optimizing the sintering aid to fundamentally improve the shortcoming of the weak strength of the barium titanate series ceramic dielectric material itself, Its strength is improved, thereby improving the mechanical strength of the multilayer ceramic capacitor made of it, and at the same time, the cost and processing difficulty of obtaining a multilayer ceramic capacitor with high mechanical strength are greatly reduced

Method used

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  • Ceramic material as well as preparation method and application thereof
  • Ceramic material as well as preparation method and application thereof
  • Ceramic material as well as preparation method and application thereof

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preparation example Construction

[0040] The ceramic material of the invention can be applied in the preparation of multilayer ceramic capacitors. In some embodiments, the preparation method includes the following steps:

[0041] (1) The raw materials of ceramic slurry are mixed and ball-milled to obtain ceramic slurry, wherein the raw materials of ceramic slurry include ceramic material, binding agent and solvent of the present invention;

[0042] (2) casting the above-mentioned ceramic slurry to form a layer of film, drying to obtain a ceramic dielectric layer;

[0043] (3) forming an internal electrode layer on the surface of the ceramic dielectric layer obtained in step (2) by a printing process;

[0044] (4) Laminating, pressing, debinding and sintering the above-mentioned ceramic dielectric layer printed with internal electrodes to obtain a ceramic chip;

[0045] (5) Coating conductive paste for external electrodes on both ends of the ceramic chip, and baking at a temperature of 600-900°C to form exter...

Embodiment 1～26

[0060] Embodiment 1~26 and comparative example 1~12

[0061] Embodiments 1-26 (abbreviated as real 1-26) and comparative examples 1-12 (abbreviated as pair 1-12) respectively provide a kind of ceramic material, these ceramic materials comprise barium titanate compound, rare earth element and Sintering aids, in which barium titanate compounds are (Ba 1-x-y Ca x Sr y ) m (Ti 1-p-q Zr p f q )O 3 , x are all 0, y are all 0, p are all 0, q are all 0, m are all 1, these barium titanate compounds are all prepared by solid phase method, and they are powders made in the same batch; Note that the molar ratio of rare earth elements to barium titanate compounds is a%, the molar ratio of MgO to barium titanate compounds is b%, and MnO 2 The molar ratio with barium titanate compound is c%, SiO 2 The molar ratio to the barium titanate compound is d%, and the values ​​of a, b, c, d, b / c and c / d are shown in Table 2.

[0062] Table 2

[0063]

[0064]

[0065] The preparation ...

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Abstract

The invention discloses a ceramic material as well as a preparation method and an application thereof. The ceramic material comprises a barium titanate compound, a rare earth element and a sintering aid, the content of the rare earth element and the sintering aid is not zero, and the sintering aid comprises MgO, MnO2 and SiO2; based on the molar weight of the barium titanate compound, the rare earth element accounts for 0-10%, the sintering aid accounts for 0-25%, MgO accounts for 0-10%, MnO2 accounts for 0-10%, SiO2 accounts for 0-5%, the molar ratio of MnO2 to SiO2 is 1.1-3, and the molar ratio of MgO to MnO2 is 0.3-4. By optimizing the sintering aid, the defect of weak strength of a barium titanate ceramic dielectric material is fundamentally improved, and the breaking strength and the bending strength of the multilayer ceramic capacitor are improved to be greater than or equal to 7.5 kgf and greater than or equal to 6.5 mm on the basis of ensuring that the multilayer ceramic capacitor has good electrical properties.

Description

technical field [0001] The invention relates to a ceramic material and its preparation method and application, in particular to a ceramic material whose strength is improved by optimizing sintering aids, and its preparation method and application. Background technique [0002] Multilayer ceramic capacitor (MLCC) is one of the common passive components, widely used in home appliances, mobile phones, computers and other intelligent control circuits. The production process of MLCC mainly includes three processes of molding, firing and sealing. The molding process is to fully mix ceramic powder, organic solvent and additives, and then cast it into a ceramic dielectric layer. After printing internal electrodes on the ceramic dielectric layer, stack them, press and cut them to form ceramic chips, and then sinter and seal the above ceramic chips. The terminal is made into a ceramic capacitor. Multilayer ceramic capacitors can be mainly divided into Class I high frequency ceramic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/622C04B35/63C04B41/88H01G4/12H01G4/30
CPCC04B35/468C04B35/622C04B35/6303C04B41/009C04B41/5194C04B41/88H01G4/30H01G4/1227H01G4/129C04B2235/3224C04B2235/3206C04B2235/3267C04B2235/3418C04B2235/6025C04B2235/612C04B2235/656C04B2235/6567C04B2235/6582C04B2235/96C04B41/4535C04B41/0072
Inventor 马艳红邱基华
Owner CHAOZHOU THREE CIRCLE GRP
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