摘要
以硝酸铝和氨水沉淀所得的氢氧化铝为前驱物，加入矿化剂和晶种，在水热条件下，保温3～10h，可以制出纳米级的氧化铝微粉。研究了反应条件，如前驱物浓度、矿化剂浓度、晶种添加量、反应温度和保温时间等对水热合成过程的影响，从而得到了最佳工艺参数。用XRD，SEM分析了粉末的晶型与形貌，并研究了用该法制得的氧化铝粉烧结性能，在1550℃下保温烧结2h其相对密度可达97％。以该氧化铝为原料可制备出性能良好的SrAl2O4：Eu，Dy^3＋长余辉发光粉。
The nano - α - Al2O3 powder was prepared from aluminum hydroxide precursor, which was precipitated from aluminum nitrate and ammonia water, mineralizer and crystal seed under hydrothermal condition and keeping temperature 3 - 10 h. The effects of precursor concentrations,mineralizer content,seed quantities,reaction temperature and time on hydrothermal synthesis of α - Al2O3 were investigated ,then the optimum parameters were obtained. The crystal form and shape of particles were characterized by XRD and SEM. The sintering properties of the powders were studied and the powder with 97% relative density was obtained at 1 550℃ for 2 h. High bright and long afterglow materials SrAl2O4： Eu,Dy^3＋ can be prepared by using the α - Al2O3 powders as raw material.
出处
《无机盐工业》
CAS
北大核心
2006年第5期27-29,共3页
Inorganic Chemicals Industry
关键词
水热法
氧化铝微粉
晶种
hydrothermal synthesis method
α-Al2O3 powder
crystal seed
