PZT压电纤维的制备及性能研究

Study on the Preparation and Properties of PZT Ceramic Fibers

以溶胶-凝胶(Sol-Gel)工艺制备的PZT陶瓷粉为原料,采用氧化物粉末装管法制备PZT压电陶瓷纤维。SEM分析显示,该陶瓷纤维呈圆柱型形貌,直径约为250μm。分析了不同烧结温度下PZT陶瓷纤维的断面微结构及Pb含量变化,得出PZT陶瓷纤维的最佳烧结温度为1 000℃。XRD分析表明,此温度下烧结的陶瓷纤维呈单一的钙钛矿结构。实验结果表明,采用氧化物粉末装管法制备的陶瓷纤维大小均匀,结构致密,具有高长径比,克服了传统工艺不能制备结构致密的长纤维的缺陷。

Using the PZT ceramic powder prepared by Sol-Gel method as the raw material, the PZT piezoelectric ceramic fibers have been prepaared by using the Oxide Powder in Tube（OPTT）procedure. The SEM morphology showed that the PZT ceramic fibers had a cylindrical morphology with a diameter of about 250 μm. The sectional micro-structure and the content of Pb of the PZT ceramic fiber were analyzed at different sintering temperature. The result showed that the optimal sintering termperature of the PZT ceramic fiber was 1 000℃. The X-ray diffraction patterns showed that the ceramic fibers were pure perovskite structure. Compared with conventional fabrication process,PZT ceramic fibers prepared by the OPIT method have the advantage of dense , uniform and high height-towidth ratio.