Piezoelectric and ferroelectric properties of 0.96(Na,K)(Nb_0.9Ta_0.1)O₃–0.04LiSbO₃ ceramics synthesized by molten salt method

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• 作者：Lihong Li ; Jinxia Deng ; Jun Chen ; Ranbo Yu ; Lijie Qiao ; Xianran Xing
• 关键词：Ferroelectrics ; Chemical synthesis ; Scanning and transmission electron microscopy ; X-ray diffraction
• 刊名：Journal of Alloys and Compounds
• 出版年：2009
• 出版时间：5 March 2009
• 年：2009
• 卷：471
• 期：1-2
• 页码：428-431
• 全文大小：763 K

文摘

0.96(Na,K)(Nb_0.9Ta_0.1)O₃–0.04LiSbO₃ powders in the orthorhombic phase were synthesized in the molten salt KCl at a low temperature 800 °C. It was revealed that K⁺ in the molten salt tended to substitute Na⁺ in the A-sites and the final product 0.96(Na_0.29K_0.71)(Nb_0.9Ta_0.1)O₃–0.04LiSbO₃ was synthesized from the nominal composition 0.96(Na_0.5K_0.5)(Nb_0.9Ta_0.1)O₃–0.04LiSbO₃. The dense ceramics under pressureless were obtained by sintering in the air. The ceramics exhibited high piezoelectric constant d₃₃ of 239 pC/N and good remnant polarization P_r of 30.79 μC/cm² with coercive electric field E_c of 2.01 kV/mm. And leakage current was reduced by muffling the ceramics with the as-prepared powders during the sintering process.