Dielectric properties of spark-plasma-sintered BaTiO3 |
| |
| Authors: | Tomonari Takeuchi E. Bétourné Mitsuharu Tabuchi Hiroyuki Kageyama Yo Kobayashi A. Coats F. Morrison D. C. Sinclair A. R. West |
| |
| Affiliation: | (1) Osaka National Research Institute,, AIST, Midorigaoka, 1-8-31,Ikeda,, Osaka,, 563-8577, Japan;(2) Central Research Institute of Electric Power Industry,, 11-1,2-chome, Iwado-Kita, Komae,, Tokyo,, 201-8511, Japan;(3) Department of Chemistry,, University of Aberdeen, Meston Walk,, Aberdeen,, AB24 3UE,, UK |
| |
| Abstract: | Spark-plasma-sintering (SPS) has been applied to BaTiO3 to prepare dense ceramics consisting of submicrometre-sized powder. Relatively dense (typically 97% of the theoretical X-ray density) pellets with an average grain size remaining similar to that of the starting powder, approximately 0.6  m, were obtained by the SPS process. Fixed frequency (1 kHz) measurements show the room temperature permittivity of SPS ceramics to be relatively high, approximately 3500, and at least double the value of conventionally sintered ceramics, approximately 1500. Alternating current (a.c.) impedance spectroscopy measurements show that SPS is an effective process to reduce the influence of intergranular (grain boundary) effects on the permittivity and direct current (d.c.) resistance characteristics of BaTiO3 ceramics substantially. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
