ZHEN Guansheng， HUANG Xiang， WANG Tongkun
（College of Materials Science and Engineering， Ocean University of China， Qingdao 266100， China）
Abstract：Nanoscale alumina powders were prepared by low temperature calcining after direct precipitation.With directly incorporating Ba2+,the doped alumina was compounded through solvent evaporation method.The calcined samples were obtained by calcining the two kinds of samples at high temperature respectively.The samples were tested by thermal analyzer,XRD and TEM.The results show that the phase transformation order of nanometer alumina and Ba2+dopped with temperature increasing is γ-Al2O3—δ-Al2O3—θ-Al2O3—α-Al2O3.The temperature ranges at transition stage are obtained.The doping of Ba2+ does not change the transformation order,but can improve the transformation temperature.
Keywords：alumina;nanoscale powder;doping;phase transformation
文章编号：1008-5548（2013）03-0018-05
DOI：10.3969/j.issn.1008-5548.2013.03.005
收稿日期：2012-11-18，修回日期：2012-12-08。
基金项目：青岛市基础研究计划项目，编号：12-1-4-1-（24）-jch；中国石油科技创新基金研究项目，编号：2012D-5006-0404。
第一作者简介：甄冠胜（1991—），男，硕士研究生，研究方向为氧化铝催化剂载体的制备与优化。 E-mail：a20zhsh08@163.com。
通信作者：黄翔（1972—），男，博士，副教授，研究方向为石油精制加氢脱硫催化剂。 E-mail：materials@ouc.edu.cn。
