Synthesis of polycrystalline γ-AlON powders by novel wet chemical processing  

作　　者：LEI JingXuan MA FeiZhong SHI Ying XIE JianJun HU Wei SHI ZhiWei 

机构地区：[1]Department of Electronics and Information Materials,School of Material Science and Engineering,Shanghai University,Shanghai 200072,China [2]Ceramic Department,Shanghai FRP Research Institute Co.Ltd.,Shanghai 201404,China

出　　处：《Science China(Technological Sciences)》2012年第12期3405-3410,共6页中国科学（技术科学英文版）

摘　　要：The synthesis of polycrystalline aluminum oxynitride （AlON） powders was investigated by the carbothermal reduction and ni- tridation （CRN） of amorphous precursor obtained by wet chemical processing. Co-precipitation processing was employed to achieve amorphous precursor from AI（NO3）3 solution dispersed by nanosized carbon particles, which was composed of AI（OH）3 and C particles homogeneously. The effects of the content of carbon black, pH value, and calcination temperature on formation of A1ON phase were investigated by means of XRD, SEM and TEM, respectively. It was found that single phase AION powder could be synthesized when the resultant precursors were calcined at 1750℃ for 2 hours under flowing N2. Un- der optimal additional content of C （5.6wt%）, the resultant A1ON powders exhibited the primary particle size of about 1-3 μm with a specific surface area of 3.2 m2/g, which were superior to that of carbothermal reduction of immediate mixture of γ-A1203/C powders.

关 键 词：aluminum oxynitride （AION） co-precipitation processing the content of carbon black pH value calcination temperature 

分 类 号：TQ174.758[化学工程—陶瓷工业] TQ133.1[化学工程—硅酸盐工业]