【作者】 詹芬； 章天金； 翟小斌； 江娟；

【Author】 ZHAN Fen,ZHANG Tian-jin,ZHAI Xiao-bin,Jiang Juan (Faculty of Materials Science and Engineering,Hubei University,Wuhan 430062)

【机构】 材料科学与工程学院湖北大学；

【摘要】 采用传统陶瓷固相烧结工艺,制备了Al掺杂Ba_0.8Sr_0.2TiO₃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掺杂含量为3mol%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·m^3/2·J^-1·F^-1/2。更多还原

【Abstract】 BST ceramics with different content Al-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 Ba_0.8Sr_0.2TiO₃ ceramics were investigated.The 0.3mol%Al-doped specimen revealed optimized pyroelectric properties,with dielectric constant of 6179.1,dielectric loss of 0.0016 and much higher figure-of-merit 5.69×10^-5C·m^3/2·J^-1·F^-1/2.更多还原