溶胶-凝胶法合成硅酸锆

Synthesis of Zircon by Sol-Gel Method

以正硅酸乙酯、氧氯化锆等为原料,采用溶胶-凝胶工艺合成硅酸锆粉体。借助X射线衍射(XRD)、扫描电子显微镜(SEM)等分析手段,研究合成工艺对ZrSiO4合成的影响。结果表明:合成ZrSiO4的主要影响因素是煅烧温度、升温速率及是否引入ZrSiO4晶种。较佳的煅烧工艺为升温速率大于6℃/min,1 200℃煅烧2 h。ZrSiO4晶种剂的加入可显著降低合成ZrSiO4的温度。

The zircon particles were synthesized by sol-gel method, using ethyl-silicate （Si （OCEHs）4） and zirconyl chloride （ZrOCl2 ·8H2O） as raw materials. The influences of sol-gel synthesis parameters on preparing zircon particles were researched by means of XRD and SEM as well. The results indicated that the sintering temperature, heating rate and introducing zircon species were the main factors. The better sintering technique of synthesizing zircon was that the heating rate was more than 6 ℃/min, sintering temperature was 1 200 ℃ for 2 h. The crystal seeds could observably decreased the temperature of synthesizing zircon.