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MSP方法评价PLZT压电陶瓷的强度

熊智; 彭青松; 白光照; 施鹰; 江莞   

  1. 中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室, 上海 200050
  • 收稿日期:2004-10-20 修回日期:2005-02-01 出版日期:2005-11-20 网络出版日期:2005-11-20

Modified Small Punch Tests to Evaluate Ultimate Strength of PLZT Ceramics

XIONG Zhi; PENG Qing-Song; BAI Guang-Zhao; SHI Ying; JIANG Wan   

  1. Key Lab of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050, China
  • Received:2004-10-20 Revised:2005-02-01 Published:2005-11-20 Online:2005-11-20

摘要: 采用MSP方法简便有效地评价了氧化物混合法和机械合金化法制备的PLZT压电陶瓷的破坏强度. MA法制备PLZT陶瓷在较低温度下就能烧结致密,具有较好的化学和结构均匀性.相同温度烧结的PLZT陶瓷不仅比MO方法制备的PLZT陶瓷电学性能好,而且破坏强度也更高.PLZT陶瓷经极化后,破坏强度会下降.

关键词: MSP, 掺镧锆钛酸铅, 机械合金化, 破坏强度

Abstract: Modified small punch (MSP) tests were used to evaluate the ultimate strength of lanthanum-modified lead zirconate-titanate (PLZT) ceramics prepared by conventional mixed oxide (MO) method and mechanical alloying (MA) technique respectively. The MSP tests are very convenient for these two kinds of PLZT ceramics, poled or unpoled. Fracture surfaces were examined for the different MSP specimens; the dependence of mechanical and electrical properties of PLZT ceramics on microstructures was discussed in detail.

Key words: MSP, PLZT, mechanical alloying, fracture strength

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