一维纤维状α-Al_2O_3粉体的水热-热解法制备与表征  

Hydrothermal Synthesis and Characterization of Fiber-shapedα-Al_2O_3 Powder with One Dimensional Structures

作　　者：李兆[1] 江元汝[2] 徐克[2] 赵西成[3] 赵亚娟[2] 

机构地区：[1]西安建筑科技大学材料与矿资学院,西安710055 [2]西安建筑科技大学理学院,西安710055 [3]西安建筑科技大学冶金工程学院,西安710055

出　　处：《材料导报》2013年第16期59-62,共4页Materials Reports

基　　金：国家高技术研究发展计划(863计划)(2011AA05A202);国家自然科学基金(21205092);陕西省科技计划(2011K08-26)

摘　　要：以Al(NO3)3·9H2O、尿素为原料,以PEG2000为表面活性剂,采用水热-热解法合成纤维状氧化铝粉体。用XRD、SEM对产物进行表征,研究了不同水热时间、pH值、硝酸铝浓度、PEG2000添加量及铝源等因素对纤维状α-Al2O3粉体结晶状况、晶粒尺寸、晶体形貌的影响,分析了合成反应机理。实验结果表明:PEG2000添加量是影响反应体系得到纤维形貌产物的关键。Fiber-shaped α-Al2O3 powder was produced through the hydrothermakpyrolysis method, with atumi num nitrate and urea as the reactants, and PEG2000 as the surfactant. The phase composition, apparent shape of the products α-Al2O3 were observed and analyzed by XRD, SEM. The influence of reaction conditions, such as hydrother- mal reaction time-span, pH values, PEG2000 dosage, aluminium sources and the concentration of aluminum on the α-Al2O3 powder, in terms of crystallization, particle size the particle shape were studied. Moreover, the synthesizing process and reaction mechanism were also analyzed. The results show that PEG2000 dosage is the key in the reaction system to generate fiber-shaped α-Al2O3 powder.

关 键 词：氧化铝 纤维 水热-热解 机理 

分 类 号：TQ12[化学工程—无机化工]