1,3,5-三苯基苯晶体的溶液降温法生长及其性能  

Crystal Growth and Characterization of 1,3,5-triphenylbenzene by Temperature Reduction Method

作　　者：刘刚[1,2] 许智煌[1] 叶李旺[1] 苏根博[1] 庄榕榕[3] 

机构地区：[1]中国科学院福建物质结构研究所,福州350002 [2]福建师范大学材料科学与工程学院,福州350007 [3]闽南师范大学物理与信息工程学院,福建漳州363000

出　　处：《硅酸盐学报》2017年第4期557-562,共6页Journal of The Chinese Ceramic Society

基　　金：中国科学院光电材料化学与物理重点实验室资助项目

摘　　要：以丙酮为溶剂,采用溶液降温法生长1,3,5-三苯基苯(TPB)晶体。在40~45℃温区下生长出尺寸为19 mm×15 mm×13 mm的透明块状晶体,生长速率约为3 mm/d。通过X射线衍射、光学显微镜观察、热分析、荧光光谱和脉冲形状鉴别(PSD)测试对晶体进行了表征。结果表明:降温法生长的TPB晶体为正交晶系,空间群为Pna21;TPB单晶各向透明度高,没有宏观缺陷,但在各面上均存在生长花纹。TPB晶体的熔点为174℃,蒸发损失发生在283℃;TPB晶体在360 nm处具有相对尖锐和强的带边发射峰。TPB晶体总品质因数(FOM)值为0.85,表明它具有优异的中子/伽马(n/γ)射线辨别能力。The 1,3,5-triphenylbenzene （TPB） crystals were grown in acetone solvent by a temperature-reduction method. The transparent bulk crystal with a size of 19 mm×15 mm×13 mm was obtained at 40-45 ℃ and the growth rate was approximately 3 mm/d. The TPB crystals were characterized by X-ray single-crystal diffraction, thermal analysis, microscopy, florescence spectroscopy and pulse shape discrimination （PSD） analysis. The results show that the TPB crystal grown is orthorhombic and the space group is Pna21, the melting point of TPB crystal is 174 ℃ and the evaporation mass loss occurs at 283 ℃. The TPB single crystal grown by a cooling method has a high transparency without any macroscopic defects, but there are growth pattern on the surface. The TPB crystal has relatively sharp and intense band-edge emission peaks at 360 nm. The total figure of merit （FOM） value of TPB crystals is 0.85, indicating that it has an excellent neutrons/γ ray discriminative ability.

关 键 词：1 3 5-三苯基苯晶体 丙酮 溶液降温法 中子/γ射线甄别 

分 类 号：O782[理学—晶体学]