机构地区: 重庆科技学院冶金与材料工程学院
出 处: 《人工晶体学报》 2013年第9期1880-1883,共4页
摘 要: 采用固相法制备了Nb2Sr2-x Y x O7陶瓷。研究了掺Y对陶瓷的晶体结构、表面形貌、铁电、介电和压电性能的影响。研究结果表明:钇掺杂Sr2Nb2O7陶瓷,Y3+取代了A位Sr2+,形成Nb2Sr2-x Y x O7固溶体,并提高了铌酸锶陶瓷铁电、介电和压电性能。在x=0.05时,Nb2Sr2-x Y x O7陶瓷的铁电性能达到最大(剩余极化强度P r=0.254μC/cm2);在x=0.1时,Nb2Sr2-x Y x O7陶瓷的介电性能达到最大(相对介电常数εr=90,介电损耗tanδ≤0.01)。 Abstract:Nb2Sr2-xYOx7 ceramics were prepared by conventional solid state reaction method. The influence of Y on the crystal structure, surface morphology, ferroelectric, dielectric and piezoelectric properties of Nb2Sr2-xYOx7 ceramics have been investigated. The results show that yttrium doped Sr2Nb2O7 ceramics, substituting y3+ for Sr2+ at A site to form Nb2Sr2-xYOx7 solid solution, and enhance the ferroelectric, dielectric and piezoelectric properties of strontium niobate ceramics. At x = 0.05, ferroelectric properties of Nb2Sr2-xYOx7 ceramics reach maximum ( Pr = 0. 254 μC/cm2 ) ; At x = 0. the dielectric properties of Nb2Sr2-xYOx7 ceramics reach the maximum value(Pr = 90, tanδ≤0.01 ). Key words: strontium niobate ; piezoelectric ceramic ; ferroelectric ; dielectric ; piezoelectric
领 域: [一般工业技术]