Grain size effect on piezoelectric and ferroelectric properties of BaTiO₃ ceramics

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• 作者：Yu Huan ; Xiaohui Wang ; Jian Fang ; Longtu Li
• 关键词：Barium titanate ; Grain size ; Piezoelectric and ferroelectric properties
• 刊名：Journal of the European Ceramic Society
• 出版年：May, 2014
• 年：2014
• 卷：34
• 期：5
• 页码：1445-1448
• 全文大小：1400 K

文摘

A series of dense barium titanate (BaTiO₃, BTO) ceramics with different grain sizes (GS) were prepared by two-step sintering method. The effect of GS on piezoelectric coefficient (d₃₃) and planar electromechanical coupling factor (k_p) displayed a trend similar to that on relative permittivity (蓻鈥?. The values of d₃₃, k_p, and 蓻鈥?increased significantly with decreasing GS, reaching maximum values (蓻鈥?#xA0;= 6079, d₃₃ = 519 pC/N and k_p = 39.5%) at approximately 1 渭m, and then decreased rapidly with further decreasing GS. The results revealed that high-performance BTO ceramics could be effectively prepared by controlling GS. Polarization-electric field hysteresis loops and temperature dependence of 蓻鈥?/em> were also investigated.