摘要
以Zn(Ac)2.2H2O和Al(NO3)3.9H2O为原料,用溶胶-凝胶法制备了ZnO/Al2O3(ZAO)复合粉体。研究了Al2O3掺杂浓度、锌离子浓度、反应温度、pH值、反应时间和烧结温度等对粉体平均粒径的影响,用正交实验得到最佳制备方案。用激光粒度分析(LPA)、能谱分析(EDAX)、热重-差热分析(TG-DTA)和X-射线衍射分析(XRD)对粉体的性能进行了表征。结果表明:制备的纳米ZAO粉属于六方晶系纤锌矿结构。其X-射线衍射图谱中并没有氧化铝的衍射峰,Al3+取代了Zn2+的位置,形成固熔体。Al2O3掺杂浓度、锌离子浓度、pH值和烧结温度等对粉体平均粒径的影响较大,在最佳条件下,制得的ZAO复合粉体粒径分布均匀、平均粒径约为22 nm。
ZnO/Al2O3; （ZAO） nanometer powders are prepared by sol-gel method with Zn（Ac）2 · 2H2O and Al（NO3 ）3· 9 H2O as precursor. The influential factors on average diameter of ZAO powders, such as Al2O3 mass fraction,Zn^2＋ concentration,reaction temperature, pH value,reaction time and heat treatment temperature are investigated by orthogonal tests to determine optimium conditions. Characterized by EDAX,TG-DTA ,XRD and LPA, the nanometer ZAO is found to be belonging to hexagonal system. There is no Al2O3, peak in XRD,and Zn2^＋ is replaced by Al^3＋. A few aluminum oxide is formed into solid solution in zinc oxide. The average diameter is affected mainly by Al2O3 mass fraction,Zn^2＋ concentration, pH value and heat treatment temperature. Under the best conditions,the prepared powder is well-distributed with an average grain size of 22 nm.
出处
《化学与生物工程》
CAS
2006年第9期15-17,共3页
Chemistry & Bioengineering
