KNN Based Lead-Free Piezoceramics with Improved Thermal Stability
DU Juan1, WANG Jin-Feng1, ZHENG Li-Mei1, WANG Chun-Ming1, QI Peng2, ZANG Guo-Zhong3
1School of Physics, State Key laboratory of Crystal Materials, Shandong University, Jinan 2501002College of Physics Science and Technology, China University of Petroleum, Dongying 2570613College of Materials Science and Engineering, Liaocheng University, Liaocheng 252059
KNN Based Lead-Free Piezoceramics with Improved Thermal Stability
DU Juan1, WANG Jin-Feng1, ZHENG Li-Mei1, WANG Chun-Ming1, QI Peng2, ZANG Guo-Zhong3
1School of Physics, State Key laboratory of Crystal Materials, Shandong University, Jinan 2501002College of Physics Science and Technology, China University of Petroleum, Dongying 2570613College of Materials Science and Engineering, Liaocheng University, Liaocheng 252059
摘要Lead-free piezoelectric ceramics (1-x)(Na0.53K0.404Li0.066)Nb0.92Sb0.08O3+xSrTiO3 are fabricated by conventional solid-state sintering method, and their dielectric and piezoelectric characteristics are investigated. With the addition of SrTiO3, the growth of the grain size is restrained, meanwhile the phase transition temperature of orthorhombic-tetragonal is shifted below room temperature. It is found that the ceramics with x=0.010 exhibit excellent piezoelectric properties (d33=220pC/N, kp=41%, kt=39%) and improved thermal stability around room temperature. The results indicate that these materials are promising lead-free piezoceramics for practical operations.
Abstract:Lead-free piezoelectric ceramics (1-x)(Na0.53K0.404Li0.066)Nb0.92Sb0.08O3+xSrTiO3 are fabricated by conventional solid-state sintering method, and their dielectric and piezoelectric characteristics are investigated. With the addition of SrTiO3, the growth of the grain size is restrained, meanwhile the phase transition temperature of orthorhombic-tetragonal is shifted below room temperature. It is found that the ceramics with x=0.010 exhibit excellent piezoelectric properties (d33=220pC/N, kp=41%, kt=39%) and improved thermal stability around room temperature. The results indicate that these materials are promising lead-free piezoceramics for practical operations.
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