LATTICE-PARAMETER CHANGES IN THE MIXED-OXIDE SYSTEM CE1-XLAXO2-X/2 - A COMBINED EXPERIMENTAL AND THEORETICAL-STUDY

被引：59

作者：

MORRIS, BC

FLAVELL, WR

MACKRODT, WC

MORRIS, MA

机构：

[1] UMIST,DEPT CHEM,POB 88,MANCHESTER M60 1QD,ENGLAND

[2] ICI CHEM & POLYMERS LTD,RUNCORN WA7 4QD,CHESHIRE,ENGLAND

[3] ICI KATALCO R&T GRP,BILLINGHAM TS23 1LB,CLEVELAND,ENGLAND

来源：

JOURNAL OF MATERIALS CHEMISTRY | 1993年 / 3卷 / 10期

关键词：

CERIUM OXIDE; LANTHANUM DOPING; X-RAY DIFFRACTION; LATTICE PARAMETER; ATOMISTIC LATTICE CALCULATION;

D O I：

10.1039/jm9930301007

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：

X-Ray diffraction measurements are reported of ceramic samples of the mixed-oxide system Ce1-xLaxO2-x/2 for 0<x<0.9, where x has been determined by EDXA. The solid-state reaction forms a highly crystalline product at an ageing temperature of 1200-degrees-C. The solubility limit of La in the bulk CeO2 at this temperature has been determined as ca. 52% by monitoring the lattice parameter increase and the subsequent appearance of a second La2O3 phase. To model the experimental measurements, atomistic lattice calculations based on electron-gas shell-model potentials have been carried out to estimate the variation of the lattice parameter with La content.

引用

页码：1007 / 1013

页数：7

共 19 条

[1] CALCULATED LATTICE AND DYNAMIC PROPERTIES AND DEFECT CHEMISTRY OF TERNARY AND QUATERNARY CUPRATES RELATED TO HIGH-TC SUPERCONDUCTIVITY [J].