摘要
采用化学溶液沉积(CSD)技术,用廉价的无机盐(SrCO3、(NH4)6Mo7O24.4H2O)为主要初始原料、常见的有机试剂(丙三醇、冰乙酸和乙二醇甲醚)为溶剂,成功地制备了Ca0.7Sr0.3MoO4和Ba0.3Sr0.7MoO4两类具有白钨矿结构的二元固溶体粉末,并对两种粉体的结构、形貌、颗粒分布以及室温光致发光性能进行了测试。研究表明,两类钼酸锶基固溶体粉末都具有单一的四方相结构,且固溶特性良好,没有检测到明显的杂质峰;固溶体粉末的形貌和尺寸与粉体的成分密切相关,Ca0.7Sr0.3MoO4粉体的晶粒较小,为纳米量级,而Ba0.3Sr0.7MoO4粉体呈现明显的四棱锥外观,晶粒尺寸较大,为微米量级;两类粉末均呈现宽带发光特性,最大发光波长位于蓝绿光波段;Ca0.7Sr0.3MoO4粉体在室温下的发光强度较高,而Ba0.3Sr0.7MoO4粉体在同样条件下的发光强度极其微弱。
Two kinds of binary SrMoO4-based solid-solution powders,Ca0.7Sr0.3MoO4 and Ba0.3Sr0.7MoO4,have been successfully synthesized via Chemical Solution Deposition process,in which inorganic salts（SrCO3,（NH4）6Mo7O24·4H2O） have been chosen as the main raw materials aiding with the common organic solvent（glycerol,acetic acid,ethylene glycol monomethyl ether）.The crystalline phase structure,morphology,powder-size distribution and the photoluminescence properties at room temperature of the two kinds of powders were measured.The results indicate that both the binary SrMoO4-based powders are solid-solutions with tetragonal structure and without detectable impurity;the morphologies of the powders were affected by the composition of the solid-solutions;the grain size of Ca0.7Sr0.3MoO4 powder belongs to the nanometer scale,while Ba0.3Sr0.7MoO4 powder is of the micrometer with rectangular pyramid shape;both of the powders show the broad band luminescence and the maximum emission wavelength is in the blue-green band when excited by UV light;and the luminescence intensity of Ca0.7Sr0.3MoO4 powder is strong at room temperature,while the luminescence of Ba0.3Sr0.7MoO4 powder is extremely weak.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2010年第5期1146-1150,共5页
Journal of Synthetic Crystals
基金
国家自然科学基金项目重大国际合作项目(No.50410179)
国家自然科学基金自由申请项目(No.50372042)
霍英东教育基金项目(No.94008)
关键词
钼酸锶钙
钼酸锶钡
粉体
化学溶液沉积技术
发光
Ca0.7Sr0.3MoO4
Ba0.3Sr0.7MoO4
powder
chemical solution deposition process
luminescence
