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>Self-Growth of Centimeter-Scale Single Crystals by Normal Sintering Process in Modified Potassium Sodium Niobate Ceramics
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Self-Growth of Centimeter-Scale Single Crystals by Normal Sintering Process in Modified Potassium Sodium Niobate Ceramics
In this manuscript, an interesting phenomenon is reported. That is the self-growth of single crystals in Pb-free piezoelectric ceramics. These crystals are several centimeters in size. They are grown without any seed addition through a normal sintering process in modified potassium sodium niobate ceramics. It has been achieved by the composition designed to compensate the Na+ loss which occurs during the liquid phase sintering. The composition of the crystals is (K0.4925Na0.4925−xBa0.015+x/2)Nb0.995+xO3 [x is determined by the Na+ loss, due to Na2O volatilization]. These crystals have high piezoelectric voltage coefficients (g33, 131 10−3Vm/N), indicating that they are good candidates for piezoelectric sensors and energy harvesting devices. We hope that this report can offer the opportunity for many researchers to have an interest in these crystals.
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机译：在此手稿中，报道了一个有趣的现象。这就是无铅压电陶瓷中单晶的自生长。这些晶体大小为几厘米。它们是在改性铌酸钾钠陶瓷中通过常规烧结过程生长而无需添加任何种子的。通过设计用于补偿在液相烧结过程中发生的Na + 损失的组合物已经实现了该目的。晶体的组成为（K0.4925Na0.4925-xBa0.015 + x / 2）Nb0.995 + xO3 [x由Na2O挥发引起的Na + 损失确定。这些晶体具有高压电电压系数（g33，131 10 −3 Vm / N），表明它们是压电传感器和能量收集装置的良好候选者。我们希望这份报告能为许多研究人员提供对这些晶体感兴趣的机会。
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