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首页> 外文会议>International Conference on Rare Earth Research and Application; 20060625-30; Beijing(CN) >Influence of Composition on Properties of BNT-BT Lead-Free Piezoceramics
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Influence of Composition on Properties of BNT-BT Lead-Free Piezoceramics

机译：组成对BNT-BT无铅压电陶瓷性能的影响

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摘要

Lead-free piezoelectric ceramics of (Bi_(1/2)Na_(1/2))TiO_3-BaTiO_3(BNT-BT) were prepared by the conventional piezoelectric ceramic preparation technique (free air atmosphere sintering). The influence of BaTiO_3 additive amount and La_2O_3 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 ( d_(33)) of materials start increasing and then decreasing while BaTiO_3 additive amount increasing, the ε and d_(33) of materials have maximum value (ε = 1650, d_(33) = 120 PC·N~(-1)) while x (BaTiO_3) =0.06 mol. The ε and d_(33) of materials start increasing and then decreasing while La_2O_3 additive amount increasing, the e and d_(33) of materials have maximum value (ε = 1684, d_(33) = 153 PC·N~(-1)) while w(La_2O_3) =0.3% . The influence of La_2O_3 additive amount on the microstructure of BNT-BT piezoelectric ceramics was analysed by SEM(scanning electron microscope) . The influence mechanism of La_2O_3 additive amount on the properties of BNT-BT piezoelectric ceramics was discussed. The BNT-BT ceramics with optimum comprehensive properties were obtained.
机译：（Bi_（1/2）Na_（1/2））TiO_3-BaTiO_3（BNT-BT）的无铅压电陶瓷是通过常规的压电陶瓷制备技术制备的（自由空气气氛烧结）。研究了BaTiO_3和La_2O_3的添加量对BNT-BT无铅压电陶瓷性能的影响。结果表明，材料的介电常数（ε）和压电应变常数（d_（33））开始增加，然后减小，而BaTiO_3的添加量增加，材料的ε和d_（33）达到最大值（ε= 1650， d_（33）= 120 PC·N〜（-1）），而x（BaTiO_3）= 0.06 mol。当La_2O_3的添加量增加时，材料的ε和d_（33）开始增大，然后减小，材料的e和d_（33）具有最大值（ε= 1684，d_（33）= 153 PC·N〜（-1） ）），而w（La_2O_3）= 0.3％。通过扫描电镜（SEM）分析了La_2O_3添加量对BNT-BT压电陶瓷显微组织的影响。探讨了La_2O_3添加量对BNT-BT压电陶瓷性能的影响机理。获得了具有最佳综合性能的BNT-BT陶瓷。

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