Microstructure and electrical properties of calcium copper titanate ceramics

Laijun Liu, Huiqing Fan

科研成果: 书/报告/会议事项章节会议稿件同行评审

2 引用 (Scopus)

摘要

The effect of stoichiometry, i.e. Ca/Cu ratios (CaCu3xTi 4O12, x = 0.8, 0.9, 1.0, 1.1 and 1.2) on the microstructure and electrical properties was investigated. The grain sizes of CaCu3XTi4O12 composition increased sharply with the increase of copper, from ∼1 μm with x = 0.8 to ∼50 ∼m with x = 1.2. The real part of dielectric permittivity changed dramatically, the pellet with x = 1.0 had the highest dielectric permittivity ∼160, 000 at 1 kHz. Furthermore, the dielectric permittivity of all pellets was impressively large values (between 10, 000 to 1, 000,000 at 100 Hz) and was nearly constant over a wide frequency range between 100 Hz to ∼100 MHz. However, the dielectric permittivity of CaCu3XTi4O12 composition is not consistent with the amount of copper and cell parameters and grain sizes. Impedance spectroscopy exhibited that the CaCu3XTi 4O12 composition had two semicircle at least at high frequency (∼ 10 Hz) and low frequency (〈100 Hz), respectively. The grain and grain boundary of the compositions had different impedance and relaxation behavior.

源语言英语
主期刊名Selected, peer reviewed papers from The Sixth Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6
出版商Trans Tech Publications Ltd
551-555
页数5
版本PART 1
ISBN(印刷版)0878494626, 9780878494620
DOI
出版状态已出版 - 2007
活动6th Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6 - Jeju, 韩国
期限: 5 11月 20079 11月 2007

出版系列

姓名Materials Science Forum
编号PART 1
561-565
ISSN(印刷版)0255-5476
ISSN(电子版)1662-9752

会议

会议6th Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6
国家/地区韩国
Jeju
时期5/11/079/11/07

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