Mechanical activation synthesis and dielectric properties of 0.48PFN-0.36PFW-0.16PZN from mixed oxides

被引:13
作者
Khim, AS [1 ]
Wang, J [1 ]
Xue, JM [1 ]
机构
[1] Natl Univ Singapore, Fac Sci, Dept Mat Sci, Singapore 119260, Singapore
关键词
0.48PFN-0.36PFW-0.1; 6PZN; mechanical activation; dielectric properties; XRD;
D O I
10.1016/S0925-8388(00)01117-8
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Nanocrystalline 0.48PFN-0.36PFW-0.16PZN phase of perovskite structure was successfully prepared via mechanical activation of mixed oxides of PbO, Fe2O3, WO3, Nb2O5 and ZnO for more than 15 h at room temperature. The powder derived from 20 h of mechanical activation exhibits a particle size in the range of 10-20 nm. It undergoes decomposition upon heat treatment to pyrochlore phase before a single perovskite phase was developed at the sintering temperature of 820 degrees C for 45 min. The sintered ceramic exhibits a density of similar to 98% theoretical density and a maximum dielectric permittivity of similar to 9357 at the Curie temperature of similar to 27 degrees C measured at a frequency of 100 Hz. (C) 2000 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:181 / 187
页数:7
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