Synthesis and characterization of Pb(Fe0.5Nb0.5)O3 by sol-gel and solid-state method

被引：7
|
作者：
Jenhi, M [1 ]
El Ghadraoui, EH
Balli, H
El Aatmani, M
Rafiq, M
机构：
[1] Fac Sci Dhar El Mahraz, Lab Chim Minerale, Fes, Morocco
[2] Fac Sci & Tech Saiss, Lab Chim Minerale, Fes, Morocco
[3] Fac Sci Semlalia, Lab Chim Minerale, Marrakech, Morocco
来源：
ANNALES DE CHIMIE-SCIENCE DES MATERIAUX | 1998年 / 23卷 / 1-2期
关键词：
D O I：
10.1016/S0151-9107(98)80044-5
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A chemical dispersion method was developed for the synthesis of typical relaxer compound Pb(Fe-0.5 Nb-0.5)O-3, PFN. This process is based on the dispersion of the excess of Pb(NO3)(2) by thermal treatments. The pyrochlore phase is first formed at 500 degrees C and the perovskite phase begins to appear above 500 degrees C. A two phase ceramic is obtained at 700 degrees C, and a nearly pure perovskite phase is obtained at 750 degrees C. Moreover by CMO method (calcining of mixed oxides) a simple calcination process is proposed to eliminate the stable lead-niobate pyrochlore phase presented during calcining Pb(Fe0.5Nb0.5)O-3. Pure perovskite Pb(Fe0.5Nb0.5)O-3 is obtained by drying at and calcining the mixture of 4PbO/Fe2O3/Nb2O5 at 850 degrees C.
引用
收藏
页码：151 / 154
页数：4
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