以乙酸铅、乙酸镧、乙酸氧锆和钛酸丁酯为原料,用溶胶-凝胶法制备了掺镧锆钛酸铅(PLZT)凝胶纤维.该纤维经热解、烧结后成为直径约25μm的陶瓷纤维.陶瓷纤维的表面和断面形貌的电子扫描图象表明,该陶瓷纤维均匀致密.用阿基米德法测得陶瓷纤维的密度为:7.78×103kg/m3.对于直径为4.4mm、厚度为43μm、陶瓷含量为70％的PLZT陶瓷纤维/环氧树脂1-3复合材料压电片,测得其压电常数d33、机电转换常数kt分别为:410pC/N和0.631.
Using lead acetate, lanthanum acetate, zirconium oxide acetate and titanium butoxide as precursors, lanthanum doped lead zirconate titanate gel fibers were fabricated by the sol-gel method. After being
prolyzed and sintered, The PLZT ceramic fibers with a diameter of 25μm were obtained. The morphology and cross-section of the fibers were studied by SEM. The micrographs show that, these
ceramic fibers are dense and uniform. The density of the fibers is 7.78×103kg/m3, which was measured by Archimedes method. For a PLZT fiber/epoxy 1-3 composite disk with a diameter
of 4.4mm, a thickness of 43μm and ceramic volume fraction of 0.7, its piezoelectric coefficient d33 and electromechanic coefficient kt are 410pC/N and 0.631, respectively.
参考文献
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