Ba0.6Sr0.4TiO3-Sr(Ga0.5Ta0.5)O3 固溶体的介电性能
Dielectric properties of Ba0.6Sr0.4TiO3-Sr(Ga0.5Ta0.5)O3 solid solutions.
作者信息
Xu Yebin, Liu Ting, He Yanyan, Yuan Xiao
机构信息
Institute of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China.
出版信息
IEEE Trans Ultrason Ferroelectr Freq Control. 2008 Nov;55(11):2369-76. doi: 10.1109/TUFFC.944.
Ba(0.6)Sr(0.4)TiO(3)-Sr(Ga(0.5)Ta(0.5))O(3) solid solutions are prepared by a solid-state reaction method, and their dielectric and tunable characteristics are investigated. The solid solutions with cubic perovskite structures are obtained for compositions of 10-50 mol% Sr(Ga(0.5)Ta(0.5))O(3). It is observed that the addition of Sr(Ga(0.5)Ta(0.5))O(3) into Ba(0.6)Sr(0.4)TiO(3) causes a shift in the phase transition peak to a lower temperature. Ba(0.6)Sr(0.4)TiO(3)-Sr(Ga(0.5)Ta(0.5))O(3) solid solutions exhibit depressed and broadened phase transition peaks, resulting in decreased dielectric constants and dielectric losses at room temperature. With the increase of Sr(Ga(0.5)Ta(0.5))O(3) content, the dielectric constant, loss tangent, and tunability are decreased. 0.9Ba(0.6)Sr(0.4)TiO(3)-0.1Sr(Ga(0.5)Ta(0.5))O(3) has a dielectric constant epsilon = 534 and a tunability of 16% at 100 kHz under 2.63 kV/mm. The dielectric characteristics of Ba(0.6)Sr(0.4)TiO(3)-Sr(Ga(0.5)Ta(0.5))O(3) ceramics at microwave frequencies are also evaluated.
采用固相反应法制备了Ba(0.6)Sr(0.4)TiO(3)-Sr(Ga(0.5)Ta(0.5))O(3)固溶体，并对其介电和可调特性进行了研究。对于10-50 mol% Sr(Ga(0.5)Ta(0.5))O(3)的组成，获得了具有立方钙钛矿结构的固溶体。观察到向Ba(0.6)Sr(0.4)TiO(3)中添加Sr(Ga(0.5)Ta(0.5))O(3)会导致相变峰向较低温度移动。Ba(0.6)Sr(0.4)TiO(3)-Sr(Ga(0.5)Ta(0.5))O(3)固溶体表现出压低和变宽的相变峰，导致室温下介电常数和介电损耗降低。随着Sr(Ga(0.5)Ta(0.5))O(3)含量的增加，介电常数、损耗角正切和可调性降低。0.9Ba(0.6)Sr(0.4)TiO(3)-0.1Sr(Ga(0.5)Ta(0.5))O(3)在2.63 kV/mm、100 kHz下具有介电常数ε = 534和16%的可调性。还评估了Ba(0.6)Sr(0.4)TiO(3)-Sr(Ga(0.5)Ta(0.5))O(3)陶瓷在微波频率下的介电特性。
Zotero 插件