云斯宁 Likes:

Affiliation of Author(s):

材料科学与工程学院

Journal:

Materials research bulltin

Key Words:

中文关键字：陶瓷；xrd衍射；介电性能；铁电体，英文关键字：ceramics; x-ray diffraction; dielectric properties

Abstract:

Barium strontium titanate (BST) with the molar formula (Ba0.8Sr0.2TiO3) ceramics has been prepared by two different processing methods: mixed-oxide (BST-MO) and reaction-sintering (BST-RS). X-ray powder diffraction study shows differences in grain size and crystal symmetry for both these ceramics. The former shows a tetragonal symmetry while the latter presents a cubic symmetry. The occurrence of polar micro-regions associated with the higher chemical non-homogeneous distribution of ion defects from the influence of the processing parameters is the main reason for the higher peak dielectric constant (Km), the higher remanent polarization (Pr), the higher coercive field (Ec), the higher peak current density (Jm), and the lower the temperature of peak dielectric constant (Tm) in BST-MO ceramics.

Note:

云斯宁

Co-author:

XiaoliWang,DelongXu

First Author:

yunsining

Indexed by:

Journal paper

Volume:

卷：43

Issue:

期：43

Page Number:

页：1889-1995

Translation or Not:

no

Date of Publication:

2008-04-01