Synthesis of ZnO nano- and microcrystals by recrystallization in enclosed volume

X-ray analysis and electron microscopy have been used for investigation of the influence of water vapor pressure on the particulate composition and habitus of ZnO crystals, formed during thermal treatment of Zn(OH)2 in enclosed volume at 450 °C. It has been observed that increasing water partial pressure during thermal treatment of zinc hydroxide in enclosed volume, through distilled water additions, promotes the formation of rod microcrystals of zinc oxide. Meanwhile during Zn(OH)2 thermal treatment in enclosed volume without water additions, nanocrystal zinc oxide without shape anisotropy has been formed.