文章基本信息

标题：Self-Growth of Centimeter-Scale Single Crystals by Normal Sintering Process in Modified Potassium Sodium Niobate Ceramics
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作者：Cheol-Woo Ahn ; Ho-Yong Lee ; Guifang Han 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
期号：1
DOI：10.1038/srep17656
语种：English
出版社：Springer Nature
摘要：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 (K_0.4925Na_0.4925−xBa_0.015+x/2)Nb_0.995+xO₃ [x is determined by the Na⁺ loss, due to Na₂O volatilization]. These crystals have high piezoelectric voltage coefficients (g₃₃, 131 10 ⁻³ Vm/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.