摘要
制备出以α-Al2O3为内核,以含Ce3+的氧化铈为外壳的氧化铝-氧化铈核/壳复合磨粒。以硝酸铈为前驱物,经红外干燥后,在α-Al2O3内核上覆盖一层硝酸铈,通过煅烧成为含Ce3+的氧化铈外壳。通过电子显微镜照片分析和X衍射分析表明:在α-Al2O3上覆盖上了氧化铈,形成氧化铝-氧化铈核/壳结构。通过电子探针分析和光谱半定量分析证明:核/壳结构中氧化铈所占比例为小于2%,通过激光粒度分析仪对氧化铝-氧化铈核/壳复合磨粒进行分析,其粒度d50为2μm左右。
Composite grains with a core-shell structure are developed,in which α-Al2O3 is the core and the CeO2 containing Ce3+ is the shell.Firstly,α-Al2O3 is covered by the cerium nitrate which is desiccated by the infra-red.Then,this covered α-Al2O3 is calcined to be composite grains,and their structure is confirmed by the SEM and XRD.The amount of CeO2 in the composite gains is less than 2%,which is proved by the electron probe microanalysis and semi quantitative spectrometric analysis.Moreover,the particle size of d50 is about 2 μm by laser particle size analyzer.
出处
《金刚石与磨料磨具工程》
CAS
2013年第3期75-78,共4页
Diamond & Abrasives Engineering
