BISMUTH(III)-BASED AND ANTIMONY(V)-BASED CERAMICS WITH ANION-DEFICIENT FLUORITE STRUCTURE

被引：14
作者：
CHAMPARNAUDMESJARD, JC [1 ]
MANIER, M [1 ]
FRIT, B [1 ]
TAIRI, A [1 ]
机构：
[1] UNIV HASSAN II,FAC SCI,DEPT CHIM,CASABLANCA,MOROCCO
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 1992年 / 188卷 / 1-2期
关键词：
D O I：
10.1016/0925-8388(92)90669-Z
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：
Original non-stoichiometric oxides with the formula M2-2xBi3xSb2-xO7 (M = Cd, Zn) have been found in the Bi2O3-Sb2O5-MO (M = Cd, Zn) systems. These phases belong to the pyrochlore family. Niobium- and lanthanum-substituted MBi1.5Sb1.5O7 (M = Cd, Zn) so id solutions have been synthesized by solid state reaction. The composition ranges and the evolution of the lattice parameters as a function of the ionic radii of the substituting elements have been determined. The low frequency dielectric properties have been evaluated between room temperature and 473 K on sintered ceramic samples. Their variations are discussed in terms of the electronic structures of the involved cations and the relative polarisabilities of both the NbO6 and SbO6 octahedra.
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页码：174 / 178
页数：5
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