Synthesis of Single-Crystalline Plate-shaped K0.5Na0.5NbO3 Particles by Multi-step Molten Salt Method

摘要：

　　In this study,single-crystalline plate-shaped K0.5Na0.5NbO3 (KNN) particles were successfully synthesized by a multi-step molten salt method (MMSM).First,precursor particles K4Nb6O17 (K4N6) with layer-structure was synthesized at 1050 ℃ in molten KCl-salt (MMSM-1) by starting materials of Nb2O5 and K2CO3.Second,plate-shaped KNN was synthesized at 1000 ℃ in molten KCl-NaCl-salt (MMSM-2) from K4N6 particles and K2CO3 powders.X-ray diffraction (XRD) analysis revealed that the crystallographic 010 plane of K4N6 was converted into the pseudo-cubic 001 plane of KNN.SEM images showed that MMSM-synthesized KNN particles preserved the shape of K4N6 precursor particles,and had a thickness of about 3~5μm,a width of 10~15μm and a length of 15~20μm.EDX spectrum proved that the K∶Na mole ratio was 0.6∶0.4.These plate-shaped KNN particles were very promising templates to fabricating textured KNN-based ceramics.

关键词： Piezoelectric ceramics Multi-step molten salt method Perovskite

作者: Zhi Liu Yue-Mina Li Zong-Yang Shen Zhu-Mei Wang

作者单位: School of Materials Science and Engineering,Jiangxi Key Laboratory of Advanced Ceramic Materials,Jingdezhen Ceramic Institute,Jingdezhen 333403,China

会议类型: 国际会议

会议名称: The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))

会议地点: 厦门

会议语种:英文

页码: 1395-1398

在线出版日期: 2011-11-04（万方平台首次上网日期，不代表论文的发表时间）