云斯宁 Likes:

Affiliation of Author(s):

材料科学与工程学院

Journal:

Materials Chemistry and Physics

Key Words:

中文关键字：陶瓷，烧结，粉体衍射，介电性能，英文关键字：ceramics；sintering；powder diffraction；dielectric p

Abstract:

The temperature dependence of dielectric constantwas investigated for (BCT-NBT) and (BCT-BiT5) ceramic samples prepared using the solid-state reaction technique. The dielectric relaxation behavior was observed in BCT-NBT15 and BCT-BiT. The different dielectric relaxation mechanisms have been discussed for these two samples. In view of the defect chemistry, Raman spectroscopy was made on BCT-NBT5, BCT-NBT15, BCT-BiT5 and (BTC-BiT). The development of the new Raman bands at 827 and 825 for BTC-BiT and BCT-BiT, respectively, indicated that Ca2+ ions substitution for B-site Ti4+ ions has happened in BCT-BiT5 ceramics, giving the evidence for the formation of O vacancies. Raman spectroscopy and the temperature dependence of dielectric studies suggest that the dielectric relaxor behavior of Bi doped barium calcium titanate ceramics is related with the Bi3+ ions and the Ca2+ ions.

Note:

云斯宁

Co-author:

XiaoliWang,JuanfeiLi,JingShi,DelongXu

First Author:

yunsining

Indexed by:

Journal paper

Volume:

卷：116

Issue:

期：2-3

Page Number:

页：339-343

Translation or Not:

no

Date of Publication:

2009-08-01