Preparation and Ferroelectric Properties of SBN:50 Ceramics
作者:
Subhash B. Deshpande,
Hari S. Potdar,
Prakash D. Godbole,
Sadgopal K. Date,
期刊:
Journal of the American Ceramic Society
(WILEY Available online 1992)
卷期:
Volume 75,
issue 9
页码: 2581-2585
ISSN:0002-7820
年代: 1992
DOI:10.1111/j.1151-2916.1992.tb05615.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
Stoichiometric quantities of AR‐grade chemicals, e.g., Ba(NO3)2, Sr(NO3)2, and Nb2O5, were used to synthesize Sr0.5Ba0.5Nb2O6(SBN:50) by the solid‐state reaction route. The reaction mixture was characterized by DTA/TG/DTG to locate the formation temperature of SBN:50. X‐ray diffrction was used to identify the major and any additional phases formed in the calcined as well as sintered materials. The materials were further characterized by electrical measurements, the temperature dependence of the dielectric constant (ɛ) and the loss (tan δ), FE hysteresis‐loop parameters (PsandEc), and room‐temperature dc resistivity. SBN:50 exhibited a broad maximum of ɛ in the temperature range 65° to 95°C. Moreover, the FE hysteresis loop persisted even at 130°C, which is much higher than the Curie range determined from an ɛ vsTplot. Microstructural photographs revealed varied grain‐size distribution between 5 and 20 μm. The presence of residual porosity (∼ 95% dense) result
点击下载:
PDF
(462KB)
返 回