CoTeMoO_6多晶粉体制备及光谱特征  

Preparation and spectral characteristics of polycrystalline powders of CoTeMoO_6

作　　者：刘旭坡 李珍[1] 金成国[1] 

机构地区：[1]中国地质大学材料与化学学院,武汉430000

出　　处：《功能材料》2014年第16期16143-16147,共5页Journal of Functional Materials

基　　金：国家科技支撑计划资助项目(2011BAB03B01)

摘　　要：利用固相反应法制备了CoTeMoO6 多晶粉体,研究了不同烧成温度下CoTeMoO6 试样的物相组成和显微形貌,对CoTeMoO6 粉体的红外和紫外-可见光谱特征进行了研究.研究结果表明,烧成温度为540-560 ℃,可制备出纯度高、结晶度好的单一CoTeMoO6 相.将合成粉体在600 ℃下进行保温处理,微晶出现了沿（001）晶面的择优生长,可观察到一组平行解理;CoTeMoO6 在中红外波段具有透光波段宽和透过率高的特点,使CoTeMoO6 可以作为潜在的中红外光学材料;CoTeMoO6 在可见光区域（450-650nm）出现了一个吸收带,是由Co＾2＋ 外层电子发生d-d跃迁所致.Polycrystalline powders of CoTeMoO6 were prepared via solid reaction method in this paper.The phase composition and microstructure morphology of samples of CoTeMoO6 under different temperature sys-tems were studied,as well as IR and UV-Vis spectra.The results show that when the sintering temperature ri-ses to 540-560 ℃,single phase of CoTeMoO6 with good crystallinity and high purity can be got.The powders of pure phase being sintering at 600 ℃,preferential growth of microcrystalline along the crystal plane of (001) occurs and a set of parallel lines of cleavage are observed.With characteristics of a broad transmitting range and high transparency in mid-infrared region,CoTeMoO6 can be served as a kind of potential optical materials.A absorption band of CoTeMoO6 in visible region(450-650 nm)appears,which may be caused by the d-d transi-tion of outer shell electrons of Co2+.

关 键 词：CoTeMoO6 物相组成 显微形貌 红外光谱 紫外-可见光谱 

分 类 号：O611[理学—无机化学]