Paper Title:
Microstructures and Dielectric Properties of CaCu3Ti4O12 Polycrystalline Ceramics
  Abstract

We report important factors affecting the dielectric properties of CaCu3Ti4O12 (CCTO) polycrystalline ceramics prepared by the conventional solid-state ceramic process. The relative dielectric constants (εr) up to several thousands (~ 3,000 at 1 kHz) were gradually increased with increasing the sintered density of samples in the case that no exaggerated grain growth occurred. An abrupt increase in εr values were, however, accompanied by the formation of abnormally grown large grains, and thus with increasing the population of abnormally grown grains, which could be achieved by a prolonged sintering at 1060°C, the εr values were remarkably increased from several thousands to ~105. Optimally processed CCTO sample exhibited a very high εr of ~ 90,000 at 1 kHz.

  Info
Periodical
Solid State Phenomena (Volumes 124-126)
Edited by
Byung Tae Ahn, Hyeongtag Jeon, Bo Young Hur, Kibae Kim and Jong Wan Park
Pages
143-146
DOI
10.4028/www.scientific.net/SSP.124-126.143
Citation
D. K. Yoo, S. I. Yoo, "Microstructures and Dielectric Properties of CaCu3Ti4O12 Polycrystalline Ceramics", Solid State Phenomena, Vols. 124-126, pp. 143-146, 2007
Online since
June 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Uraiwan Intatha, Sukum Eitssayeam, Kamonpan Pengpat, Gobwute Rujijanagul, Tawee Tunkasiri
Abstract:In this work, preparation conditions and effect of ZrO2 doped BaFe0.5Nb0.5O3 ceramics were studied. Relationship between structure and...
889
Authors: Atthakorn Thongtha, Theerachai Bongkarn
Abstract:The effect of sintering temperatures (1050-1200 °C) on the phase formation, microstructure and dielectric properties of a binary system...
1754
Authors: Chun Hong Mu, Ying Li Liu, Yuan Qiang Song, Huai Wu Zhang, Peng Liu
Abstract:CaCu3Ti4O12 presents colossal dielectric permittivity within a large temperature and frequency range, which...
321
Authors: Rachanusorn Roongtao, Supagorn Rugmai, Wanwilai C. Vittayakorn
Abstract:The 0.98BaTiO3-0.02Ba (Mg1/3Nb2/3) O3 ceramics has been synthesized through a conventional...
58
Authors: E. de Carvalho, Marcelo Bertolete, Izabel Fernanda Machado, E.N.S. Muccillo
Chapter 3: Ceramics II
Abstract:Polycrystalline CaCu3Ti4O12 ceramics were prepared by solid state reactions by spark plasma sintering (SPS)...
982