Dielectric, piezoelectric, and electromechanical phenomena in (K0.5Na0.5)NbO3–LiNbO3–BiFeO3–SrTiO3 ceramics
Dielectric, piezoelectric, and electromechanical phenomena in (K0.5Na0.5)NbO3–LiNbO3–BiFeO3–SrTiO3 ceramics
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DOI：
10.1063/1.3112564
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发表时间：
2009-04
影响因子：
4
通讯作者：
E. Li;R. Suzuki;T. Hoshina;H. Takeda;T. Tsurumi
中科院分区：
文献类型：
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作者：
E. Li;R. Suzuki;T. Hoshina;H. Takeda;T. Tsurumi
研究了BiFeO 3（BF）和SrTiO 3（ST）替代（Na0.5K0.5）NbO 3-LiNbO 3（KNN-LN）陶瓷作为无铅压电陶瓷候选材料的效果。由于Li+的晶格畸变和BF的强铁电性，在相变成分附近，压电性能增强。ST被认为是有效的，在改善的KNN陶瓷的温度依赖性。少量的ST还促进了LN和BF的晶格结合，进一步提高了压电性能。94.5（Na0.5K0.5）NbO 3 -4.5LiNbO3 -0.5SrTiO3-0.5BiFeO3陶瓷具有优异的压电性能，d15=231 pC/N，d33=155 pC/N，d31=70 pC/N。
The effect of the substitutions of BiFeO3 (BF) and SrTiO3 (ST) to (Na0.5K0.5)NbO3–LiNbO3 (KNN-LN) ceramics was studied as a candidate of lead-free piezoceramics. The piezoelectric property is enhanced near the phase transition composition caused by the distortion of crystal lattice by Li+ and also the strong ferroelectric nature of BF. The ST was found to be effective in improving the temperature dependence of the KNN ceramics. Small amount of ST also promoted the incorporation of LN and BF into the crystal lattice, and enhanced the piezoelectric performance furthermore. The 94.5(Na0.5K0.5)NbO3-4.5LiNbO3-0.5SrTiO3-0.5BiFeO3 ceramics showed excellent piezoelectric properties of d15=231 pC/N, d33=155 pC/N, and d31=70 pC/N.