Low dielectric comsumption CaCu3Ti4O12 ceramic preparing method

A low-dielectric, ceramic technology, applied in the direction of circuits, electrical components, piezoelectric/electrostrictive/magnetostrictive devices, etc., can solve the problems of large dielectric loss, etc., achieve a small number of pores, low shrinkage, and improved The effect of dielectric properties
CN101070245AInactive Publication Date: 2007-11-14XIAMEN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIAMEN UNIV
Publication Date
2007-11-14
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

This invention relates to preparation method of a low electric loss CaCu3Ti4O12 ceramic.Firstly mix the raw material calcium carbonate, titanium dioxide and cupric oxide according to molar ratio of 1:4:3, wet method ball mill to gain mixture powder. Drythe mixture powder, then preburn at 850 to 1000deg. Ball mill the mixture powder after preburning, past at least 80 orders screen mesh, dry, add polyvinyl alcohol and grind, corning, dry pressing and moulding, then cold equal steady pressure for shaping, sintering the body, then furnace cool.
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Description

technical field

[0001] The present invention relates to a kind of CaCu 3 Ti 4 o 12 (hereinafter referred to as CCTO) ceramics, especially relate to a kind of adopting cold isostatic pressing method to prepare low dielectric loss CaCu 3 Ti 4 o 12 ceramics. Background technique

[0002] Recently CaCu 3 Ti 4 o 12 The material has attracted much attention because of its unusually high permittivity near room temperature, about 10 4 ~10 5 , and has good thermal stability in the temperature range of 100 ~ 600K. When the temperature drops below 100K, ε drops sharply to about 100, but no long-range structural phase transition is observed (1, Subramanian M A, Li D, Duan N, et al. Highdielectric constant ACu3Ti4O12 and ACu3Ti3FeO12 phases[J].Solid State Chem , 2000, 15: 323-325; 2. Ramirez A P, Subramanian M A, Gardel M, et al. Giant dielectr constant response in acopper-titanate [J]. Solid State Commun, 2001, 15: 217-220; 3. Subramanian M A, Sleight A W. ACu3Ti4O12 and ACu...

Claims

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