Morita Takeshi
Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8563, Japan.
Materials (Basel). 2010 Dec 9;3(12):5236-5245. doi: 10.3390/ma3125236.
Synthesis by the hydrothermal method has various advantages, including low reaction temperature, three-dimensional substrate availability, and automatic polarization alignment during the process. In this review, powder synthesis, the fabrication of piezoelectric thin films, and their applications are introduced. A polycrystalline lead zirconate titanate (PZT) thin film was applied to a micro ultrasonic motor, and an epitaxial lead titanate (PbTiO₃) thin film was estimated as a ferroelectric data storage medium. Ferroelectric and piezoelectric properties were successfully obtained for epitaxial PbTiO₃ films. As lead-free piezoelectric powders, KNbO₃ and NaNbO₃ powders were synthesized by the hydrothermal method and sintered together to form (K,Na)NbO₃ ceramics, from which reasonable piezoelectric performance was achieved.
水热法合成具有多种优点,包括反应温度低、可利用三维衬底以及过程中自动极化取向。在本综述中,介绍了粉末合成、压电薄膜的制备及其应用。将多晶锆钛酸铅(PZT)薄膜应用于微超声电机,并且评估外延钛酸铅(PbTiO₃)薄膜作为铁电数据存储介质。外延PbTiO₃薄膜成功获得了铁电和压电性能。作为无铅压电粉末,通过水热法合成了铌酸钾(KNbO₃)和铌酸钠(NaNbO₃)粉末,并将它们一起烧结形成(K,Na)NbO₃陶瓷,从中获得了合理的压电性能。