Structure and Electrical Properties of LiF Doped 0.996(0.95K0.5Na0.5NbO3-0.05LiSbO3)-0.004BiFeO3 Piezoelectric Ceramics
Structure and Electrical Properties of LiF Doped 0.996(0.95K0.5Na0.5NbO3-0.05LiSbO3)-0.004BiFeO3 Piezoelectric Ceramics
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DOI：
10.1080/00150193.2014.932543
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发表时间：
2014-07
期刊：
影响因子：
0.8
通讯作者：
Danping Shi;Laijun Liu;Yanming Huang;L. Fang;Changzheng Hu
中科院分区：
文献类型：
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作者：
Danping Shi;Laijun Liu;Yanming Huang;L. Fang;Changzheng Hu
为了提高0.996（0.95K0.5Na0.5NbO3-0.05LiSbO3）-0.004BiFeO3无铅压电陶瓷的烧结性能，选择LiF作为烧结助剂。结果表明，当LiF含量大于1.5mol%时，室温下所研究陶瓷的相结构由两相共存转变为以正交相为主的相结构，同时居里点向高温方向发生明显的移动。具有2mol%LiF的样品表现出更高的机械品质因数Qm值，为1075.18。随着温度从30 °C升高到120°C，样品的剩余极化单调增加。
LiF was selected as a sintering additive to improve the sinterability of the 0.996(0.95K0.5Na0.5NbO3-0.05LiSbO3)-0.004BiFeO3 lead-free piezoelectric ceramics. Results suggested that at room temperature the phase structure of the studied ceramics shifted from the coexistence of two phases to a phase in which orthorhombic was dominant when the LiF value was higher than 1.5 mol%, meanwhile, a pronounced shift of the Curie point to higher temperature was observed. The sample with 2 mol% LiF exhibited a higher mechanical quality factor Qm value of ∼75.18. With increasing temperature from 30 to 120°C, the remnant polarization of the sample increased monotonically.