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
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2013年第9期1880-1883,共4页
Journal of Synthetic Crystals
基金
重庆市教委科技项目(KJ121408)
重庆市自然科学基金项目(CSCT2012JJA50017)
重庆科技学院第七届大学生科技创新项目
国家自然科学基金(51102288)
重庆科技学院校内科研基金项目(CK2013Z13)
关键词
铌酸锶
压电陶瓷
铁电
介电
压电
strontium niobate
piezoelectric ceramic
ferroelectric
dielectric
piezoelectric
