无机材料学报2012，Vol.27Issue(7)：721-725,5.DOI:10.3724/SP.J.1077.2012.11466
Ho掺杂对Bi4-xHoxTi3O12陶瓷结构与铁电性能的影响
Effect of Ho Doping on Structure and Ferroelectric Property of Bi4-xHoxTi3O12 Ceramics
摘要
Abstract
Ho-doped bismuth titanate (Bi4-xHoxTi3O12) ceramics were prepared by hot-press sintering. The effects of Ho doping on the crystalline phase, density, microstructure and ferroelectric property of the ceramics were investigated. At first, Bi4-xHoxTi3O12(x=0-0.8) powders in the main phase of Bi4Ti3O12 were synthesized from Bi2O3, TiO2 and Ho2O3 micro-powders by solid-state reaction at 900 ^ The as-synthesized powders were then sintered by hot-press at 850^0 and 30 MPa to prepare Bi4-xHoxTi3O12 ceramics. With the appropriate Ho doping content of x=0-0.4, single-phased and dense (relative density >99%) Bi4-xHoxTi3O12 ceramics were obtained. The remanent polarization (Pr) of the ceramics increased with Ho doping increasing but decreased at jo0.4, mainly due to the oxygen vacancy concentration and different doping sites. The Bi4-xHoxTi3O12 ceramics have the highest value of 2Pr=13.92 uC/cm2 at x=0.4, which is higher that that of the undoped Bi4Ti3O12 ceramics. The result indicates that appropriate Ho doping can improve the ferroelectric property of Bi4Ti3O12 ceramics.关键词
Bi4Ti3O12铁电陶瓷/Ho掺杂/固相反应/热压烧结/铁电性能Key words
Bi4Ti3O12 ferroelectric ceramics/ Ho doping/ solid-state reaction/ hot-press/ ferroelectric property分类
矿业与冶金引用本文复制引用
王传彬,傅力,沈强,张联盟..Ho掺杂对Bi4-xHoxTi3O12陶瓷结构与铁电性能的影响[J].无机材料学报,2012,27(7):721-725,5.基金项目
科技部国际科技合作项目(2009DFB50470) （2009DFB50470）
湖北省自然科学基金(2009CDB041) （2009CDB041）
中央高校基本科研业务费专项基金(2010-1a-010) （2010-1a-010）
