熔盐法制备片状氧化铝的影响因素研究

Study on the Factors Affecting the Preparation of Flake Alumina by Molten Salt

片状氧化铝的性能优良,目前广泛应用于陶瓷增强材料、化妆品、珠光颜料等领域。本文以硫酸铝和硫酸铝铵为原料,以氯化钾为熔盐,利用熔盐合成法制备片状氧化铝,研究了不同氧化铝源、煅烧温度和熔盐的含量对片状氧化铝形貌和晶型的影响,结果显示氯化钾与硫酸铝物质量的比值为12︰1,煅烧温度为1000℃,保温时间为4小时,得到了α晶型的六角形片状氧化铝,且形貌规则。

Flake alumina has excellent properties, It has been widely used in various fields, such as ceramic reinforced material, pearlescent pigment, and so on.Flake aluminium oxide was prepared by molten salt synthesis method, aluminium sulfate and aluminum ammonium sulfate was chosen as raw materials, potassium chloride as the molten salt. The effect of different aluminum source, calcination temperature and molten salt content on morphology and crystal form of flake aluminum was studied in this article. The results show that the α flaked alumina with regular morphology is obtained when the sample is held at 1000℃ for 3 hours and the atom ratio of potassium chloride and aluminum sulfate is 12︰1.