On the origin of the lattice constant anomaly in nanocrystalline ceria

被引：37

作者：

Kossoy, A

Feldman, Y

Wachtel, E

Gartsman, K

Lubomirsky, I ^{[1
]}

Fleig, J

Maier, J

机构：

[1] Weizmann Inst Sci, Dept Mat Interfaces, IL-76100 Rehovot, Israel

[2] Weizmann Inst Sci, Chem Res Support Unit, IL-76100 Rehovot, Israel

[3] Max Planck Inst Solid State Res, Stuttgart, Germany

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2006年 / 8卷 / 09期

关键词：

D O I：

10.1039/b513764k

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：

The lattice parameter of nanocrystalline ceria films prepared by sputtering was monitored as a function of annealing temperature. Within the temperature range of 150-420 degrees C, an equilibrium with atmospheric oxygen is established within a few hours, whereas grain growth does not occur. On the basis of the experimental results and analysis of literature data, we present a model that posits the formation of a non-uniform grain structure with stoichiometric interiors and oxygen deficient boundaries. This model, based on defect thermodynamics, correctly describes the dependence of the lattice parameter of nanocrystalline ceria on annealing temperature and grain size and can be extended to other materials as well.

引用

页码：1111 / 1115

页数：5

共 38 条

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