通过水热法制备粉体的实验观察到金红石、锐钛矿和а－Ａｌ２Ｏ３晶体的生长习性．采用配位多面体生长习性法则合理地解释了ＴｉＯ２和а－Ａｌ２Ｏ３的生长习性．其主要结果为а－Ａｌ２Ｏ３晶体的生长习性为平板｛０００１｝，其各晶面的生长速度为：Ｖ｛０００１｝＜Ｖ｛１１２３｝＜Ｖ｛０１１２｝＝Ｖ｛１１２０｝＜Ｖ｛０１１０｝。金红石的生长习性为柱状，其各晶面的生长速度为：Ｖ＜１１０＞＜Ｖ＜１００＞＜ Ｖ＜１０１＞＜ Ｖ＜００１＞＜ Ｖ＜１１１＞；锐钛矿的生长习性为四面体，其各晶面的生长速度为Ｋ＜０１０＞＝Ｖ＜００１＞＞Ｖ＜０１０＞＞Ｖ＜１１１＞．而ＰＢＣ理论很难合理地解释α－Ａｌ２Ｏ３晶体的生长习性．
The observed growth habit of TiO2, α-Al2O3 crystals observed under hydrothermal conditions were successfully explained by the coordination polyhedron rule concerning
growth habit. It is concluded that the habit of α-Al2O3 crystal is the hexagonal platy {0001}, and the relationship of growth rate of various faces is:
V{0001}<V{1123}<V{0112}<V{1120}<V{1010}; the growth habit of rutile (TiO2) crystal is elongated prismatic form, and the relationship
of growth rate of various faces is: V<110><V<100><V<101><V<001><V<111>; the growth habit of anatase (TiO2) crystal is
a tetrahedron, and the relationship of growth rate of various faces is: V<010>=V<001>>V<010>>V<111>. These results were compared with previous studies based on PBC theory.
参考文献
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