无机材料学报

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新型Sol-Gel技术PZT铁电厚膜的制备及电学性能研究

夏冬林; 刘梅冬; 曾亦可; 李军; 黄焱球; 刘少波   

  1. 华中科技大学电子科学与技术系 武汉 430074
  • 收稿日期:2000-12-05 修回日期:2001-01-02 出版日期:2001-11-20 网络出版日期:2001-11-20

Electrical Properties of Thick Lead Zirconate Titanate Films Fabricated Using a New Sol-Gel Processing

XIA Dong-Lin; LIU Mei-Dong; ZENG Yi-Ke; LI Jun; HUANG Yan-Qiu; LIU Shao-Bo   

  1. Department of Electronic Science and Technology Huazhong University of Science and technology; Wuhan 430074
  • Received:2000-12-05 Revised:2001-01-02 Published:2001-11-20 Online:2001-11-20

摘要: 采用新型sol-gel技术在 Pt/Ti/SiO2/Si基片上制备出了厚度为 2~60μm的PZT铁 电厚膜材料;研究了PZT厚膜的结构及其介电、铁电性能.XRD谱分析显示,PZT厚膜 呈现出纯钙钛矿相结构,无焦绿石相存在.SEM电镜照片显示,PZT膜厚均匀一致,无裂 纹、高致密.厚度为50μm的PZT厚膜的介电常数为860,介电损耗为0.03,剩余极化强度 是25μC/cm.矫顽场是40kV/cm.

关键词: PZT厚膜, 新型Sol-gel技术, 介电性能, 铁电性能

Abstract: Lead zirconate titanate (Pb(Zr0.53Ti0.47)O3, PZT) ferroelectric films 2-60μm in thickness were successfully fabricated on Pt-coated oxidized
Si substrates(Pt/Ti/SiO2/Si) by a new sol gel processing. The microstructure and morphology of the prepared PZT thick films were
investigated via X-ray diffractometry and scanning electron microscopy techniques. X-ray diffraction patterns taken on these films show
single-phase perovskite-type structure, and no pyrochlore phase exists in thick films, and SEM micrographs suggest that the PZT thick films
are of high density, crack-free, and uniformity. Dielectric constant of 860, loss tangent of 0.03, remanent polarization of 25μC/cm2, a coercive field of 40kV/cm were measured on 50μm thick films.

Key words: ferroelectric thick film, lead zirconate titanate (PZT), sol-gel technique, dielectric properties, ferroelectric properties

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