摘要
以钨酸钠和硝酸钙为原料,以十六烷基三甲苯溴化铵为表面活性剂,用沉淀法配制出钨酸钙混浊液,将钨酸钙混浊液在100℃烘干后,得到球形钨酸钙微晶。对样品进行X射线衍射和透射电子显微镜分析。结果表明:制备的样品结晶良好,球状形貌完整,颗粒间无团聚,晶粒直径为2.1～3.2μm。十六烷基三甲苯溴化铵对分散球形钨酸钙微晶的形成起着决定性作用。在265nm波长光的激发下,钨酸钙微晶在峰位约位于420nm处出现一宽化的蓝色本征发光带,其强度约为团聚颗粒的2倍。
Spherical calcium tungstate microcrystals were prepared with heat treatment at 100℃ and using a calcium tungstate muddy solution by precipitation with natrium tungstate and calcium nitrate as starting materials, and with cetyltrimethyl ammonium bromide as a surfactant. The spherical calcium tungstate microcrystals were characterized by X-ray diffraction and transmission electron microscopy. The results indicate that the crystallites of the calcium tungstate samples are excellent, and the diameters of the calcium tungstate microcrystats with outstanding spherical morphology are 2.1-3.2 μm, and the particles are well dispersed and not aggregated. Cetyltrimethyl ammonium bromide plays an important role in the formation of spherical calcium tungstate microcrystals. When excited at 265 nm, the luminescence of calcium tungstate microcrystals exhibits a luminous peak in the blue band. The luminescent intensity of spherical calcium tungstate microcrystals is about two times greater than that of the aggregate particles.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2008年第11期1606-1608,共3页
Journal of The Chinese Ceramic Society
关键词
钨酸钙
形貌
表面活性剂
光致发光
calcium tungstate
morphology
surfactant
photoluminescence
