所属单位：材料科学与工程学院

发表刊物：Materials research bulltin

关键字：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

摘要：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.

备注：云斯宁

合写作者：XiaoliWang,DelongXu

第一作者：云斯宁

论文类型：期刊论文

卷号：卷：43

期号：期：43

页面范围：页：1889-1995

是否译文：否

发表时间：2008-04-01