SPINODAL DECOMPOSITION IN SOLUTIONS OF TERNARY OXIDES

被引：10

作者：

BURKERT, N ^{[1
]}

GRUNE, R ^{[1
]}

SCHMALZRIED, H ^{[1
]}

RAHMAN, S ^{[1
]}

机构：

[1] UNIV HANNOVER,INST MINERAL,W-3000 HANNOVER,GERMANY

来源：

BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 1992年 / 96卷 / 11期

关键词：

SOLID SOLUTION; SPINEL; SPINODAL DECOMPOSITION; THERMODYNAMICS;

D O I：

10.1002/bbpc.19920961116

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：

A miscibility pp exists in the quasi-binary solid solution Co2TiO4 - CoAl2O4 as verified by experimental investigations and theoretical calculations. The critical temperature is ca. 1700 K. Spinodal decomposition was observed in this two-cation-sublattice system, if the spinel solid solution had been undercooled into the region of the coherent spinodal at T = 973 K. Simultaneous ordering occurs in certain regions of the crystal. The growth-rate of the spinodal wavelength lambda varies linearly in time. This unusual quasi-ripening process is discussed in relation to the characteristic features of diffusion in (semiconducting) oxides.

引用

页码：1603 / 1607

页数：5

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