Abstract

The dependence of the ZnO crystal morphology on the flow and composition of the reductive gas mixture in the ZnO-H 2-H 2O-O 2 system was investigated at a crystallization temperature of 1200°C. Two regions of a morphologically stable growth were found. Most of the crystals were isometric: platelet-and prism-type. Morphologically unstable crystal growth with less isometric or hybrid growth habits was observed between the stable regions. The unstable region is related to the vapor phase composition associated with extreme flow values. The mechanism of the steam influence on the zincite crystal growth is discussed.

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