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中文摘要：
摘要：采用固相法制备了Nb2Sr2-xYOx7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-xYxO7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-xYxO7陶瓷的铁电性能达到最大（剩余极化强度Px=0．254μC／cm2）；在x=0．1时，Nb2Sr2-xYxO7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）。关键词：铌酸锶；压电陶瓷；铁电；介电；压电中图分类号：TB34文献标识码：A文章编号：1000-985X（2013）09—1880-04
英文摘要：
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
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