以硝酸锶、钛酸四丁酯、柠檬酸和乙二醇为原料，采用络合溶胶-凝胶法制备钛酸锶纳米粉体，研究了反应条件对成胶以及粉体形貌、晶型、粒径的影响。借助粉末X射线衍射仪（XRD）、扫描电子显微镜（SEM）、傅里叶红外光谱仪（FT?IR）及激光粒度分布仪（SL）对产物进行表征。结果表明，控制pH=4.0~6.0、柠檬酸与金属离子的摩尔比大于1.5、乙二醇与钛酸四丁酯摩尔比为2∶3时，可得到稳定前躯体溶胶，脱水成为凝胶，经900℃煅烧2 h可制备出平均粒径为70 nm、形貌规则的高纯度钙钛矿型钛酸锶纳米粉体。
Strontium titanate nano?powders were prepared by complexing sol?gel method. The Sr(NO3)2,tetra?n?butyl titanate, citric acid and ethylene glycol were taken as reactants. The influence of reaction conditions on gel forming and morphology and particle size of synthesized powder was discussed. By means of XRD,SEM,FTIR and SL,the microstructure,particle size and dispersity were characterized. The results show that stable precursor sol could be obtained under the reaction conditions:pH value of 4.0 to 6.0,the molar ratio of citric acid to metal ion greater than 1.5,the molar ratio of ethylene glycol to tetra?n?butyl titanate 2∶3. After dehydration,gel can be obtained from sol. Perovskite?type strontium titanate nano?powders of high purity with the average particle size of 70 nm were calcined at 900 ℃ for 2 h.
参考文献
| [1] | 李标荣.ⅡA族钙钛矿型氧化物半导瓷的结构与特性[J].硅酸盐学报,2001(06):591-595. |
| [2] | Boudali, A;Khodja, MD;Amrani, B;Bourbie, D;Amara, K;Abada, A .First-principles study of structural, elastic, electronic, and thermal properties of SrTiO3 perovskite cubic[J].Physics Letters. A,2009(8/9):879-884. |
| [3] | Tarawipa Puangpetch;Thammanoon Sreethawong;Susumu Yoshikawa .Synthesis and photocatalytic activity in methyl orange degradation of mesoporous-assembled SrTiO3 nanocrystals prepared by sol-gel method with the aid of structure-directing surfactant[J].Journal of molecular catalysis, A. Chemical,2008(1/2):70-79. |
| [4] | 江元汝,李兆,王利静,张忠奎,王玮.钛酸锶粉体的制备及催化降解孔雀石绿废水[J].化学世界,2012(08):467-470. |
| [5] | Johnson D C;Prieto A L .Use of strontium titanate(SrTiO3)as an anode material for lithium-ion batteries[J].Journal of Pow-er Sources,2001,196(18):7736-7741. |
| [6] | 胡海泉,鄢春根,刘春福,王裕芳.电子陶瓷最新研究动向和开发趋势[J].中国陶瓷,2003(05):34-37,54. |
| [7] | 邵庆辉,古国榜,章丽娟,李新军.纳米材料的合成与制备进展研究[J].兵器材料科学与工程,2002(04):59-63. |
| [8] | 管浩,黄新友.超细钛酸锶陶瓷粉体的湿化学制备技术[J].硅酸盐通报,2006(05):180-185. |
| [9] | 李月峰 .超细钛酸锶粉体的液相法制备研究[D].四川大学,2005. |
| [10] | 方惠会,王开毅,薛松.碳酸铵共沉淀法制备高纯超细钛酸锶粉体[J].功能材料,2000(04):408-409,415. |
| [11] | 徐明霞,郑嘹赢,孙清池,杨义敏,徐廷献.无机盐原料溶胶-凝胶工艺合成高纯超细钛酸锶粉料[J].硅酸盐学报,2000(02):184-186. |
| [12] | Chandy N. George;J.K. Thomas;R. Jose .Synthesis and characterization of nanocrystalline strontium titanate through a modified combustion method and its sintering and dielectric properties[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2009(1/2):711-715. |
| [13] | Narendar Y;Messing G L .Mechanisms of phase separation in gel-based synthesis of multicomponent metal oxides[J].Catal-ysis Today,1997,35:247-268. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%