Sintering effects on dielectric properties of (Ba,Sr)TiO3 ceramics
Sintering effects on dielectric properties of (Ba,Sr)TiO3 ceramics
复制标题
DOI：
10.1016/j.ceramint.2003.10.019
复制
发表时间：
2004
影响因子：
5.2
通讯作者：
L. Szymczak;Z. Ujma;J. Hańderek;J. Kapusta
中科院分区：
文献类型：
--
作者：
L. Szymczak;Z. Ujma;J. Hańderek;J. Kapusta
研究了烧结对传统混合氧化工艺制备的Ba0.8Sr0.2TiO3（BST 80/20）陶瓷过渡参数和介电特性的影响。通过扫描电子显微镜（SEM）和x射线衍射分析，发现在不同烧结时间下，陶瓷的晶粒尺寸和晶相含量存在差异。通过测量介电常数ε′、损耗因子tanδ和剩余极化率随温度的变化来研究相变和介电性能。研究了ε′(T)和tanδ(T)特性的频率依赖性。结果表明，介电常数和剩余极化的最大值一般与所研究陶瓷体积中晶相的含量成正比。
The sintering effect on transition parameters and dielectric characteristics of Ba0.8Sr0.2TiO3(BST 80/20) ceramics prepared by the conventional mixed-oxide processing technique was studied. Grain structure analysis performed by a scanning electron microscope (SEM) and X-ray diffraction studies showed differences in grain size and contents of crystal phase within the ceramics sintered at constant temperature for a variety of sintering times. The phase transitions and dielectric properties were investigated by measuring the dielectric constant ε′, the loss factor tanδ and the remanent polarization Pras a function of temperature. The frequency dependence of ε′(T) and tanδ(T) characteristics was also studied. It was shown that the maximal values of the dielectric constant and the remanent polarization are in general proportional to the content of the crystal phase in the volume of the studied ceramics.