%0 Journal Article
%T Effect of Ho Doping on Structure and Ferroelectric Property of Bi4-xHoxTi3O12 Ceramics
%A WANG Chuan-Bin
%A FU Li
%A SHEN Qiang
%A ZHANG Lian-Meng
%J 无机材料学报
%D 2012
%I Science Press
%R 10.3724/sp.j.1077.2012.11466
%X 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  nd 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 x>0.4, mainly due to the oxygen vacancy concentration and different doping sites. The Bi4-xHoxTi3O12 ceramics have the highest value of 2Pr=13.92 μC/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.
%K <p>Bi4Ti3O12 ferroelectric ceramics
%K Ho doping
%K solid-state reaction
%K hot-press
%K ferroelectric property</p>
%U http://www.jim.org.cn/fileup/PDF/20120709.pdf