以（NH4）SO4为沉淀剂和分散剂,Sc（NO4）3为母盐,采用均相沉淀法合成了片状的碱式硫酸钪前驱沉淀物[Sc（OH）SO4].通过差热/热重分析了前驱体的热分解过程,并结合红外光谱、X-射线衍射、透射电镜联用X-射线光电子能谱等测试手段研究了前躯体及煅烧产物的成分、性质.结果表明,由该法制备出的Sc2O3超细粉具有纯度较高、颗粒粒度小（100 nm）、粒度分布均匀、分散性好、近似球形的优异性能.通过水洗-乙醇清洗-丙酮搅拌,结合超声-室温干燥-湿磨等方式处理,对粉体分散性的提高均起到了重要的作用.
The basic sulfate scandium precursor [Sc（OH）SO4] which appeared a flaky structure was synthesized using ammonium sulfate as a precipitating agent and scandium sulfate solution as mother liquor via a homogeneous precipitation approach.Thermal decomposition process of the precursor upon calcination was analyzed by DTA/TG.The properties and component of the precursor and calcined powder were investigated by IR,XRD and TEM-EDX.The results showed that the resultant Sc2O3 powder was highly pure,ultrafine（100 nm）,narrow particle size distribution and spherical.Through the process of distilled water,ethanol and acetone washing in combination with ultrasound,drying at room temperature and wet milling during calcination,the dispersion of Sc2O3 powder was greatly improved.
参考文献
| [1] | Ji-Guang Li;Takayasu Ikegami;Toshiyuki Mori .Solution-based processing of Sc_2O_3 nanopowders yielding transparent ceramics[J].Journal of Materials Research,2004(3):733-736. |
| [2] | Lupei, A;Lupei, V;Gheorghe, C;Ikesue, A .Excited states dynamics of Er3+ in Sc2O3 ceramic[J].Journal of Luminescence,2008(5-6):918-920. |
| [3] | Tao Feng;JianLin Shi;Danyu Jiang .Preparation of transparent Ce:YSAG ceramic and its optical properties[J].Journal of the European Ceramic Society,2008(13):2539-2543. |
| [4] | Grosso D.;Sermon PA. .Scandium oxide nanoparticles produced from sol-gel chemistry[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2000(2):359-363. |
| [5] | Ji-Guang Li;Takayasu Ikegami;Toshiyuki Mori .Wet-Chemical Routes Leading to Scandia Nanopowders[J].Journal of the American Ceramic Society,2003(9):1493-1499. |
| [6] | 肖进,张庆礼,邵淑芳,刘文鹏,丁丽华,殷绍唐.Sc2O3： Nd,Sc2O3：Yb纳米粉体的制备和光致发光[J].人工晶体学报,2009(02):296-300,345. |
| [7] | Y. Wang;B. Lu;X. Sun .Synthesis of nanocrystalline Sc_2O_3 powder and fabrication of transparent Sc_2O_3 ceramics[J].Advances in Applied Ceramics,2011(2):95-98. |
| [8] | 闻雷,孙旭东,王介强,左良.Y2O3超微粉及其透明陶瓷的制备[J].东北大学学报(自然科学版),2002(12):1151-1154. |
| [9] | S.Braun;L.G.Appel .Thermal behaviour of aluminas with different morphologies[J].British Ceramic Transactions,1999(2):81-85. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%