中文摘要：

采用尿素辅助的共沉淀模板法，通过在单分散的SiO2微球模板上包覆Lu（OH），制备出了具有核-壳结构的Si02@Lu（OH）3粉体颗粒，经煅烧后得到了LSO：Ce^3＋荧光粉体．结果发现煅烧温度对荧光粉的相组成和形貌都产生了很大影响．当在1200℃下煅烧2h时，得到了单相LSO：Ce^3＋粉体．在900℃煅烧后的粉体颗粒呈球形，粒径大约为400～500nm，随着煅烧温度的升高，粉体形状变得不规则，而且有团聚现象．采用PL光谱仪对1200℃煅烧的粉体进行了光学性能表征，结果表明其激发谱中的最强激发峰位于360nm处，发射谱表现为位于384～440nm范围内宽发射峰中心420am，归因为Ce^3＋的5d→4f间的电子跃迁．

英文摘要：

Core-shell structured SiO2·Lu（OH）3 particles have been successfully fabricated via a urea-assisted homogeneous precipitation method using St6ber method derived silica as templates. LSO：Ce3＋ phosphors were obtained by a subsequent calcination procedure. It was found that the calcinations tempera- ture had a great influence on the phase and morphology of the final phosphors. A single-phase LSO：Ce3＋ was prepared at 1200℃ for 2 h. The sample treated at 900℃ shows spherical morphology with the particle size of about 400～500 nm, while the sample calcined at higher temperature displays irregular shape with some aggregation. The photoluminescence （PL） spectra of the sample treated at 1200℃ were investigated. The excitation spectrum is dominated by a broad band centered at 360 nm. Monitored with 360 nm UV emission, the emission spectrum consists of a broad band ranging from 384 nm to 440 nm with a maximum peak at 420 nm, which can be attributed to the 5d→4f transition of Ce3＋.