Influence of Composition on Properties of BNT-BT Lead-Free Piezoceramics
来源期刊：Journal of Rare Earths2006年第S1期
论文作者：杨文翰 高春华 陈志刚 刘会平
文章页码：321 - 324
摘 要：<正>Lead-free piezoelectric ceramics of （Bi1/2Na1/2）TiO3-BaTiO3（BNT-BT） were prepared by the conventional piezoelectric ceramic preparation technique （free air atmosphere sintering）. The influence of BaTiO3 additive amount and La2O3 additive amount on the properties of BNT-BT lead-free piezoceramics were investigated. The results show that the dielectric constant（ε） and piezoelectric strain constant（d33） of materials start increasing and then decreasing while BaTiO3 additive amount increasing, the e and d33 of materials have maximum value （ε= 1650, d33 = 120 PC·N -1 ） while x （BaTiO3） =0.06 mol. Theεand d33 of materials start increasing and then decreasing while La2O3 additive amount increasing, the e and d33 of materials have maximum value （ε= 1684, d33 = 153 PC·N-1） while w（La2O3） =0.3% . The influence of La2O3 additive amount on the microstructure of BNT-BT piezoelectric ceramics was analysed by SEM（ scanning electron microscope）. The influence mechanism of La2O3 additive amount on the properties of BNT-BT piezoelectric ceramics was discussed. The BNT-BT ceramics with optimum comprehensive properties were obtained.
黄新友，高春华，陈志刚，刘会平
摘 要：<正>Lead-free piezoelectric ceramics of （Bi1/2Na1/2）TiO3-BaTiO3（BNT-BT） were prepared by the conventional piezoelectric ceramic preparation technique （free air atmosphere sintering）. The influence of BaTiO3 additive amount and La2O3 additive amount on the properties of BNT-BT lead-free piezoceramics were investigated. The results show that the dielectric constant（ε） and piezoelectric strain constant（d33） of materials start increasing and then decreasing while BaTiO3 additive amount increasing, the e and d33 of materials have maximum value （ε= 1650, d33 = 120 PC·N -1 ） while x （BaTiO3） =0.06 mol. Theεand d33 of materials start increasing and then decreasing while La2O3 additive amount increasing, the e and d33 of materials have maximum value （ε= 1684, d33 = 153 PC·N-1） while w（La2O3） =0.3% . The influence of La2O3 additive amount on the microstructure of BNT-BT piezoelectric ceramics was analysed by SEM（ scanning electron microscope）. The influence mechanism of La2O3 additive amount on the properties of BNT-BT piezoelectric ceramics was discussed. The BNT-BT ceramics with optimum comprehensive properties were obtained.
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