KINETIC-STUDY OF THE SOLUTION-MEDIATED TRANSFORMATION OF ORTHORHOMBIC BARIUM FLUORIDE INTO CUBIC BARIUM FLUORIDE

被引：16

作者：

KOLAR, ZI ^{[1
]}

BINSMA, JJM ^{[1
]}

SUBOTIC, B ^{[1
]}

机构：

[1] RUDJER BOSKOVIC INST, SYNTH NEW MAT LAB, YU-41001 ZAGREB, CROATIA

来源：

JOURNAL OF CRYSTAL GROWTH | 1992年 / 116卷 / 3-4期

关键词：

D O I：

10.1016/0022-0248(92)90656-4

中图分类号：

O7 [晶体学];

学科分类号：

0702 [物理学]; 070205 [凝聚态物理]; 0703 [化学]; 080501 [材料物理与化学];

摘要：

The transformation of alpha-(orthorhombic)BaF2 into beta-(cubic)BaF2 was studied by X-ray diffraction analysis, scanning electron microscopy and particulate analysis of the solid phase, and chemical analysis of the liquid phase of the samples drawn off the suspension at various transformation times t(T). The transformation process was found to take place by dissolution of the unstable orthorhombic modification and growth of the microcrystals of alpha-BaF2 Present at constant supersaturation. Following such a model of the transformation process, the kinetic equation of the transformation was derived and correlated with experimental data. The activation energy of the crystal growth of beta-BaF2 was calculated.

引用

页码：473 / 482

页数：10

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