摘要
采用传统陶瓷固相烧结工艺,制备了Al掺杂Ba0.8Sr0.2TiO3陶瓷,采用Archimedes排水法测定陶瓷的体密度,用X射线衍射仪(XRD)观察陶瓷的物相结构,研究了Al掺杂对BST陶瓷介电性能和热释电性能的影响。实验结果表明,Al掺杂可以明显改善陶瓷的介电性能和热释电性能。当Al掺杂摩尔含量为3%时,BST陶瓷具有最佳热释电性能,在100 kHz测得其介电常数为6179.1,介电损耗为0.0016,探测率优值为5.69×10-5C.m3/2/(J.F1/2)。
BST ceramics with different content N-doping were prepared by the conventional ceramic technology. The density of the ceramics were measured with Archimedes theory, the ceramic phase structure was studied by XRD, the dielectric and pyroelectric properties of Al-doped Ba0.8Sr0.2TiO3 ceramies were investigated. The 0.3 % Al-doped specimen revealed optimized pyroelectric properties, with dielectric constant of 6 179.1, dielectric loss of 0. 001 6 and much higher figure-of-merit 5.69 × 10^-5 C·m^3/2/（J·F^1/2）.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2009年第4期98-100,共3页
Journal of Wuhan University of Technology
