棒状结构LaAl_(11)O_(18)的共沉淀原位合成及物相结构研究（英文）  

Phase Study of the Rod-like LaAl_(11)O_(18) In-situ Synthesized by the Co-precipitation Method

作　　者：王振[1] 邵渭泉[1] 陈沙鸥[1] 何丽珠[1] 朱海玲[2] 班月琴 郭晓杰[1] 赵海峰[1] 张英男[1] 

机构地区：[1]青岛大学物理学院,青岛266071 [2]潍坊学院物理与光电系,潍坊261061

出　　处：《青岛大学学报（自然科学版）》2015年第3期35-39,共5页Journal of Qingdao University(Natural Science Edition)

基　　金：山东省自然科基金(批准号:ZR2014EMQ005,ZR2010EQ001)资助;山东省高校科研发展计划(批准号:J14LJ08,J15LA13)资助;泰山学者建设工程专项经费(批准号:ts20120528)资助

摘　　要：以硝酸铝,硝酸镧及碳酸氢铵为原料,采用共沉淀法制备纯相的LaAl11O18及Al2O3/LaAl11O18复合粉体。分别用激光粒度仪,X射线衍射,扫描电镜对粉体的粒度,物相组成及形貌进行了表征。结果表明,所制备的纯相LaAl11O18粉体及Al2O3/LaAl11O18复合粉体平均粒径约为1μm;在800℃到1200℃之间快速升温,加大Al2O3的比例均会抑制LaAlO3的形成,有利于得到纯相铝酸镧粉体;同时发现得到的LaAl11O18晶粒呈棒状,长径比约为5∶1,能够均匀的分散在Al2O3基体中。The pure LaAl11O18 and the composite powders of Al2O3/LaAl11O18 were prepared by a co-precipitation method using La（NO3）3 ·6H2O and Al（NO3）3 ·9H2O as source materials.The phase of the LaAl11O18 and LaAl11O18/Al2O3 was analyzed by the X-Ray diffraction（XRD）.The morphology of the powder was observed by the scanning electron microscope（SEM）.The results showed that increasing the heating rate from 800℃to 1200℃ or adding excess Al2O3 inhibits the formation of LaAlO3,with the pure LaAl11O18 power being obtained.Moreover,it was found that the Al2O3/LaAl11O18 composite powder prepared by a co-precipitation method contained LaAl11O18 and Al2O3.The rod-like LaAl11O18 distributed uniformly in the Al2O3 matrix and its average aspect ratio was about 5.

关 键 词：LaAl11O18 共沉淀 原位合成 棒状结构 

分 类 号：TQ174.7[化学工程—陶瓷工业]