原位制备PZT/ZrO_2纳米复相陶瓷强韧机制研究  

Reinforcement mechanisms of PZT/ZrO_2 nanocomposites ceramics prepared by in-situ method

作　　者：李建华[1] 任永道 

机构地区：[1]中国人民武装警察部队学院科研部,河北廊坊065000 [2]威海市消防支队,山东威海266520

出　　处：《电子元件与材料》2011年第5期15-17,30,共4页Electronic Components And Materials

基　　金：国家自然科学基金资助项目(No.10232030)

摘　　要：采用聚合物B位前驱体法制备了锆钛酸铅基(PZT/ZrO2)纳米复相陶瓷,研究了所制陶瓷的力学性能。采用残余应力场模型讨论了纳米ZrO2粒子强韧化PZT基体的机制。结果表明:四方和单斜ZrO2纳米粒子在原位析出,PZT/ZrO2纳米复相陶瓷的断裂韧性和抗弯强度相对于纯PZT分别提高了79%和41%,同时压电性能稍微降低。PZT/ZrO2 nanoparticles ceramics were prepared by the polymeric B-site precursor method.The mechanical properties of prepared ceramic were studied.By using the residual stress field model,the reinforcement mechanisms were proposed and disscussed.The results show that both monoclinic and tetragonal ZrO2 nanoparticles precipitate in situ from the PZT matrix.The flexural strength and the fracture toughness improve 79% and 41% compared with those of monolithic PZT,respectively.The piezoelectric properties of PZT/ZrO2 nanocomposites are decreased slightly.

关 键 词：PZT纳米复相陶瓷 微观结构 力学性能 压电性能 

分 类 号：TM28[一般工业技术—材料科学与工程]