摘要
以工业氧化铝溶胶为原料,分别以氟化锌和硝酸铵为矿化剂,通过溶胶-凝胶法制备α-氧化铝纳米粉体。利用TG-DSC研究了前驱体的加热变化过程,用场发射扫描电镜、X射线衍射分析仪和电位粒度仪对样品进行表征。结果表明:同样条件下,矿化剂硝酸铵比氟化锌使θ-氧化铝向α-氧化铝转化温度降低了100℃左右,且所得α-氧化铝纳米粉体的粒径小、粒径分布窄;不同矿化剂因机理不同,其作用效果也不同。对矿化剂的机理进行了分析和研究。
α- alumina nanopowder was prepared by sol-gel method with industrial pure alumina sol as raw material, zinc fluoride and ammonium nitrate as mineralizers respectively. Thermogravimetry-differential scanning calorimetry （ TG - DSC ） , field emission scanning electron microscope （ FE - SEM ） , X - ray diffraction （ XRD ） , and Zetasizer were used to characterize the thermo-reaction properties of samples. Results showed that the phase transformation temperature of θ - alumina to α-alumina can be reduced by about 100 ℃ under the same condition, and the gained α - alumina nanopowder possesses smaller grain size and narrower grain size distribution by adding ammonium nitrate compared with zinc fluoride. Different mineralizers have different effects according to the different reaction mechanism of mineralizers. Then, reaction mechanism of mineralizers was analyzed and researched.
出处
《无机盐工业》
CAS
北大核心
2009年第5期18-20,共3页
Inorganic Chemicals Industry
基金
河南省教育厅自然科学基金资助项目(2006430011)
河南省教育厅自然科学基金资助项目(2007430017)
