| 摘要 |
PROBLEM TO BE SOLVED: To firstly provide urchin-like zinc oxide which consists of a number of acicular particles and has large specific surface area and relatively high strength and to secondly provide a method for producing the urchin-like zinc oxide where the zinc oxides of other shapes are hardly mixed, at the low firing temperature and with a high yield in a production process, while there is no possibility of generating toxic gases. SOLUTION: The zinc oxide has an urchin-like shape formed by aggregation of one ends of≥10 acicular particles. In the method for manufacturing the urchin-like zinc oxide, the product obtained by mixing an aqueous solution (I) containing carbonate ions and/or bicarbonate ions and ammonium ions and an aqueous solution (II) containing zinc ions is fired at≥300°C. The zinc ion concentration in the aqueous solution (II) is set lower than the total ion concentration of the carbonate ions and bicarbonate ions in the aqueous solution (I) and the pH of the aqueous solution (I) is regulated to 2 to 7. COPYRIGHT: (C)2004,JPO
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