球形YBO_3：Eu（3＋）荧光粉的水热合成和光致发光性能

以表面活性剂CTAB为结构导向剂,在180℃下水热反应24h成功制备出均匀的球形YBO3：Eu3＋荧光粉.用X-射线（XRD）,场发射扫描电镜（FESEM）和光致发光光谱仪（PL）对样品进行了测试,结果表明,在球霞石结构的球状样品的形成过程中,CTAB与Y3＋的比值起到了关键作用,而且较高的退火温度（≥1100℃）会产生新相（Y3BO6）.PL结果显示,球形YBO3：Eu3＋颗粒相比传统固相法合成的块状样品具有较高的红撜比（R/O）,其发光强度在1000℃以内会随着退火温度升高而增强.

Hydrothermal synthesis and photoluminescence properties of spherical YBO3:Eu3+ phosphors

Uniform sphere-like YBO3: Eu3+ phosphor particles (PPs) were successfully synthesized via a facile hydrothermal route at 180 for 24h with CTAB as surfactant. The asprepared samples were characterized with X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and photoluminescence spectroscopy (PL). It was found that the ratio of CTAB to Y3+ played a key role for the formation of sphere-like YBO3: Eu3+ PPs.High annealing temperature (over 1100℃) leaded to the appearance of new phase (Y3BO6)and the disappearance of the sphere-like morphology. It was found from PL results that the sphere-like YBO3: Eu3+ PPs exhibited higher ratio (R/O value) compared with the blocklike ones obtained using conventional solid-state technique, and their emission intensity enhanced with increasing annealing temperature up to 1000℃ and then declined with further increasing temperature due to the formation of new phase.