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铋掺杂对铌酸钾钠无铅压电陶瓷结构和性能的影响
作者:田爱芬 徐志蓬 刘淑娟 蒋妮 杜慧玲 
单位:西安科技大学材料科学与工程学院 西安 710054 
关键词:铌酸钾钠 无铅压电陶瓷 常压烧结 铋掺杂 
分类号:TM282
出版年,卷(期):页码:2014,42(5):667-671
DOI:10.7521/j.issn.0454-5648.2014.05.18
摘要:

用常压烧结法制备铋掺杂铌酸钾钠无铅压电陶瓷(K0.5Na0.5) 1-3x BixNbO3(KNBN)。研究不同铋掺杂量对KNN陶瓷结构、形貌、致密度及电学性能的影响。结果表明:在1 120 烧结的含铋量为1%(摩尔分数)的陶瓷表现出最好的铁电和压电性能及较好的介电性能,即压电常数最大121 pC/NP-E回线形状达到饱和,且剩余极化为12.67 μC/cm2,矫顽场Ec13.58 kV/cm,介电常数为575,损耗为5.82%(频率为1 kHz)。陶瓷样品在131 从正交结构转变到四方结构,Curie温度为400

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Lead-free piezoceramics bismuth doping potassium sodium niobate ((K0.5Na0.5) 1-3x BixNbO3) (KNBN) was prepared by a conventional ceramic processing. The effect of bismuth on the density and electrical properties of potassiumsodium niobate (KNN) ceramics was investigated. The results show that the ceramic with x of 1% has the superior electrical properties, i.e., the maximum piezoelectric coefficient of 121 pC/N, the moderate relative dielectric constant of 575 and the moderate dielectric loss of 5.82%, respectively. The saturated hysteresis loops of the sample are obtained, and the remanent polarization is 12.67 μC/cm2 and the coercive electric field is 13.58 kV/cm. The phase translation temperature from orthorhombic to tetragonal is 131 ℃, and the Curie temperature is 400 ℃.

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基金项目:
作者简介:
第一作者:田爱芬(1974- ),女,博士,讲师.
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参考文献:

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