简述了水热法在国内外的发展现状,重点介绍了目前水热法制备BaTiO_3、(K_(1-x)Na_x)NbO_3、Na_(0.5)Bi_(0.5)-TiO_3以及Bi_4Ti_3O_(12)等4种无铅压电陶瓷粉体的工艺过程,及其在制备4种粉体过程中对粉体尺寸、形貌的控制和独特的优势,同时简要评述了近年来微波水热法制备无铅压电陶瓷粉体的新工艺进展,指出水热法在制备无铅压电陶瓷方面具有一定的优势,可以制备出纯度和结晶性高、颗粒分布均匀、尺寸和形貌可控的高性能简单化合物无铅压电陶瓷粉体.下一步研究的重点和难点为合成组分可控的复杂化合物,为真正实现压电陶瓷和器件的无铅化革命作贡献.
The development progress of hydrothermal method at home and abroad is summarized. Hydrotherreal synthesis of BaTiO_3, (K_(1-x)Na_x)NbO_3,Na_(0.5)Bi_(0.5)TiO_3 and Bi_1Ti_3O_(12) is mainly introduced. The advantages of hydrothermal synthesis for the control of morphology and size are discussed. Meanwhile, the microwave-hydrothermal synthesis of lead-free piezoelectric ceramic powders is also briefly introduced. It is proposed that hydrothermal method has many advantages for preparing pure lead-free piezoelectric ceramics powder with high purity and crystaliinity,symmetrical partical distribution,controlled size and morphology. Its next main work is to synthesize the complex compound with the correct composition for the fabrication of lead-free piezoelectric ceramics and components.
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