铋掺杂对铌酸钾钠无铅压电陶瓷结构和性能的影响

用常压烧结法制备铋掺杂铌酸钾钠无铅压电陶瓷（K0.5Na0.5）1-3xBixNbO3 （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/N,P-E回线形状达到饱和,且剩余极化为12.67 μC/cm2,矫顽场Ec为13.58 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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Published in硅酸盐学报 Vol. 42; no. 5; pp. 667 - 671
Main Author 田爱芬 徐志蓬 刘淑娟 蒋妮 杜慧玲
Format Journal Article
LanguageChinese
Published 2014
Subjects
常压烧结
无铅压电陶瓷
铋掺杂
铌酸钾钠
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Summary:用常压烧结法制备铋掺杂铌酸钾钠无铅压电陶瓷（K0.5Na0.5）1-3xBixNbO3 （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/N,P-E回线形状达到饱和,且剩余极化为12.67 μC/cm2,矫顽场Ec为13.58 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℃.
Bibliography:potassium sodium niobate; lead free piezoceramic; normal sintering; bismuth doping
TIAN Aifen,XU Zhipeng,LIU Shujuan,JIANG Ni,DU Huiling（School of Materials Science and Engineering, Xi＇an University of Science and Technology, Xi＇an 710054, China）
Lead-free piezoceramics bismuth doping potassium sodium niobate （（K0.5Na0.5）1-3xBixNbO3） （KNBN） was prepared by a conventional ceramic processing.The effect of bismuth on the density and electrical properties of potassium sodium niobatel （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 12.67μC/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 ℃.
11-2
ISSN:0454-5648