SrTiO<3>-based lead-free high-energy-density ceramic material and preparation method thereof

A high energy storage density, ceramic material technology, applied in the direction of fixed capacitor dielectrics, fixed capacitor components, etc., can solve the problems of low improvement rate and non-compliance with market requirements, and achieve polarization strength improvement, low cost, and material cost. low effect
CN106587997AInactive Publication Date: 2017-04-26SHAANXI UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHAANXI UNIV OF SCI & TECH
Publication Date
2017-04-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an SrTiO<3>-based lead-free high-energy-density ceramic material and a preparation method thereof, and belongs to the technical field of material preparation. According to the method, firstly, 10 to 30 mol percent of Na<0.5>Bi<0.5>TiO<3> powder is added into SrTiO<3> powder to form a mixture; the mixture is subjected to ball milling and drying to obtain dried materials; then, the dried materials are sequentially granulated and sieved to form granulation materials; the granulation materials are made into test specimens; then, sintering is performed to obtain sintering test specimens; grinding and cleaning are performed on the obtained sintering test specimens; the front side and the back side of the ground and cleaned sintering test specimens are uniformly coated with silver electrode slurry; then, sintering is performed; and (1-x)SrTiO<3>-xNa<0.5>Bi<0.5>TiO<3> ceramics are obtained. The high-energy-density ceramic material obtained by using the method provided by the invention has the advantages that the preparation process is simple; the material cost is low; and the mass production can be realized, so that an effective path is provided for the application of the high-energy-density ceramic material.
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Description

[0001] 【Technical Field】

[0002] The invention belongs to the technical field of material preparation, and specifically relates to a SrTiO 3 -Based lead-free ceramic material with high energy storage density and preparation method thereof.

[0003] 【Background technique】

[0004] The portability and miniaturization of pulsed power systems require energy storage media to have higher energy storage density. Therefore, the development of ceramic media with high dielectric constant and high breakdown strength has become the key to the miniaturization of pulsed power devices. Dielectric capacitors mostly use ceramics or solid organic dielectric materials as energy storage media. They have obvious advantages in anti-cyclic aging and high temperature and high pressure conditions, and this type of capacitors pass dielectric polarization, domain turning or phase Variable behavior for energy storage, suitable for high pulse voltage or current supply. In the process of charging and dischargin...

Claims

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