Preparation method of perovskite-like varistor ceramic material CaCu3Ti4O12 with high dielectric constant

A technology of high dielectric constant and pressure-sensitive ceramics, applied in chemical instruments and methods, titanium compounds, inorganic chemistry, etc., can solve the problems of high energy consumption, large powder particle size, uneven chemical composition of products, etc., and achieve energy consumption Low, reduced energy consumption, and simple reaction equipment
CN102432062AActive Publication Date: 2012-05-02江苏津沂菊源生物健康产业研究院有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
江苏津沂菊源生物健康产业研究院有限公司
Publication Date
2012-05-02

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Abstract

Belonging to the technical field of preparation and application of electronic ceramics, the invention relates to a preparation method of a perovskite-like varistor ceramic material CaCu3Ti4O12 (CCTO) with a high dielectric constant. With nitrates of Cu and Ca as well as Ti (OC4H9)4 as starting materials, the method of the invention combines a hydrothermal method for preparing nanometer CCTO powder so as to prepare high performance CCTO varistor ceramics, thus realizing the purposes of lowering temperature, and improving varistor as well as dielectric properties.
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Description

technical field

[0001] The invention relates to a kind of high dielectric constant perovskite type CaCu 3 Ti 4 O 12 A preparation method of a pressure-sensitive ceramic material belongs to the technical field of electronic ceramic preparation and application. Background technique

[0002] CaCu 3 Ti 4 O 12 (referred to as CCTO) varistor ceramic material is a perovskite-like structure, which is a new type of material with a huge dielectric constant discovered in recent years. CCTO has excellent electrical properties, including an abnormal giant dielectric constant (ε≈10 4 ~10 5 ) and low dielectric loss (tanδ≈0.03), especially in a wide temperature range (100~400K) near room temperature, the dielectric constant value is almost unchanged, indicating that it has good thermal stability. At the same time, CCTO has Certain current-voltage nonlinear varistor characteristics, and the excellent capacitance-varistor comprehensive properties of CCTO materials may become a new typ...

Claims

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