水热-溶剂热法合成(K, Na)NbO3无铅压电陶瓷及其性能测试

doi:10.3724/SP.J.1077.2010.01159

无机材料学报 ›› 2010, Vol. 25 ›› Issue (11): 1159-1163.DOI: 10.3724/SP.J.1077.2010.01159 CSTR: 32189.14.SP.J.1077.2010.01159

水热-溶剂热法合成(K, Na)NbO₃无铅压电陶瓷及其性能测试

朱孔军¹, 苏礼奎¹, 季宏丽¹, 裘进浩¹, 柏林¹, 柳泽河道², 梶芳浩二²

(1. 南京航空航天大学智能材料与结构研究所, 南京 210016; 2. 高知大学水热化学实验所, 高知市 780-8520, 日本)

收稿日期:2010-03-01 修回日期:2010-04-26 出版日期:2010-11-20 网络出版日期:2010-11-01
基金资助:
国家自然科学基金(50872053); 教育部新世纪优秀人才支持计划(NCET-10-0070); 教育部重大项目培育基金(707031)

Hydrothermal Solvothermal Synthesis of (K, Na)NbO₃ Lead-free Piezoelectric Ceramics and Its Properties

ZHU Kong-Jun¹, SU Li-Kui¹, JI Hong-Li¹, QIU Jin-Hao¹, BAI Lin¹, YANAGISAWA Kazumichi², KAJIYOSHI Koji²

(1. The Aeronautical Key Laboratory for Smart Materials and Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; 2. Research Laboratory of Hydrothermal Chemistry, Faculty of Science, Kochi University, Kochi-shi 780-8520, Japan)

Received:2010-03-01 Revised:2010-04-26 Published:2010-11-20 Online:2010-11-01
Supported by:
National Nature Science Foundation of China (50872053); New Century Excellent Talents in University (NCET-10-0070); Cultivation Fund of the Key Scientific and Technical Innovation Project, Ministry of Education of China (707031)

摘要/Abstract

摘要： 通过添加异丙醇利用水热溶剂热法合成了(K, Na)NbO₃无铅压电陶瓷粉体. 研究了矿化剂浓度、反应物浓度对产物晶相、粒径大小、形貌以及化学组成等的影响. 利用X射线衍射仪、傅立叶变换红外吸收光谱以及扫描电子显微镜对所得粉体进行了表征. 随后, 利用合成的(K, Na)NbO₃无铅压电陶瓷粉体, 按照传统固相烧结工艺烧制压电陶瓷, 并研究了其压电性能. 实验结果表明: 通过添加异丙醇有机溶剂, 可以在矿化剂浓度为2mol/L的条件下合成出纯钙钛矿结构的(K, Na)NbO₃粉体. 随着反应溶液中K离子含量的增加, 产物中离子K的含量也在增加.组成为K_0.22Na_0.78NbO₃样品的压电常数d₃₃高达120 pC/N, 与传统固相合成法获得的(K_0.5, Na_0.5)NbO₃常压烧结得到的陶瓷性能相当. 由此可预见利用水热溶剂热法合成的(K_0.5, Na_0.5)NbO₃粉体烧结的陶瓷可获得更高的电学性能.

关键词: (K, Na)NbO₃, 水热-溶剂热法, 异丙醇, 压电性能, 无铅

Abstract: Hydrothermal-solvothermal method was used to synthesize (K, Na)NbO₃ powders with the addition of isopropanol. The influence of mineralizer concentration, reactive materials concentration on the phase, particle size, morphology and chemical composition of the products were investigated. The obtained powders were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) and scanning electron microscope (SEM). Then, the obtained (K, Na)NbO₃ powders were used to fabricate lead-free piezoelectric ceramics using the traditional sintering process, and its piezoelectric property was also studied. The results indicate that the pure (K, Na)NbO₃ powders with perovskite structure were successfully synthesized by hydrothermal-solvothermal method with the mineralizer solution concentration of 2mol/L and the addition of isopropanol. With increase of K+ content in the starting solutions, K+ content in the products also increased. The K/(K+Na) molar ratio in the products is lower than that in the staring solutions. Moreover, the specimen with the composition of K_0.22Na_0.78NbO₃ exhibites high piezoelectric constant up to d₃₃ = 120 pC/N, which is equivalent with the specimen of (K_0.5,Na_0.5)NbO₃ synthesized by traditional solid-state reaction method. Therefore, it can be forecasted that the (K_0.5,Na_0.5)NbO₃ ceramic sintered from the powders synthesized by hydrothermal-solvothermal method will acquire higher piezoelectric property.

Key words: (K, Na)NbO₃, hydrothermal-solvothermal method, isopropanol, piezoelectric property, lead-free

中图分类号:

TM282

朱孔军, 苏礼奎, 季宏丽, 裘进浩, 柏林, 柳泽河道, 梶芳浩二. 水热-溶剂热法合成(K, Na)NbO₃无铅压电陶瓷及其性能测试[J]. 无机材料学报, 2010, 25(11): 1159-1163.

ZHU Kong-Jun, SU Li-Kui, JI Hong-Li, QIU Jin-Hao, BAI Lin, YANAGISAWA Kazumichi, KAJIYOSHI Koji. Hydrothermal Solvothermal Synthesis of (K, Na)NbO₃ Lead-free Piezoelectric Ceramics and Its Properties[J]. Journal of Inorganic Materials, 2010, 25(11): 1159-1163.

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水热-溶剂热法合成(K, Na)NbO₃无铅压电陶瓷及其性能测试

Hydrothermal Solvothermal Synthesis of (K, Na)NbO₃ Lead-free Piezoelectric Ceramics and Its Properties

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