BGSO闪烁晶体力学性能研究  

Mechanical Properties of BGSO Scintillation Crystal

作　　者：肖学峰[1,2,3] 顾赟[1] 徐家跃[1] 张彦[1] 向卫东[3] 

机构地区：[1]上海应用技术学院材料科学与工程学院,上海201418 [2]北方民族大学物理系,银川750021 [3]同济大学材料学与工程学院,上海201804

出　　处：《人工晶体学报》2013年第1期35-41,共7页Journal of Synthetic Crystals

基　　金：国家973前期研究专项(2011CB612310);国家自然科学基金(50972093);上海市科委基础研究重点项目(11JC1412400);北方民族大学自主科研项目(2011ZQY037)

摘　　要：采用坩埚下降法生长了Ge的摩尔浓度分别为5%、10%、15%的硅锗酸铋晶体(BGSO)。利用显微压痕实验系统研究了BGSO晶体的力学性能,包括维氏硬度HV、断裂韧性Kc、屈服强度σ和脆性指数B。研究表明,BGSO晶体的力学性能参数HV、Kc和σ随着Ge含量和载荷的增加而逐渐减小,而脆性指数B则增大。在Ge含量从0到15%范围内,BGSO晶体的力学性能基本上表现为BGO和BSO两种晶体力学性能的简单混合。The mixed crystals of Bi4 （GexSi1-x）3012 （x =0.05,0. 10,0. 15） have been grown by the vertical Bridgman method. The mechanical properties of BGSO crystals, such as Vickers microhardness Hv, fracture toughness Kc, yield strength σ and brittleness index B, were evaluated using a micro indentation technique. It was found that the Hv, Kcand σ were decreased as the increasing of applied load and Ge molar concentration, while the B was increased. It can be anticipated that the BGSO crystal is less resistant to the external deformation and local fracture. In the range of 0-15% for Ge content, the mechanical characteristics of BGSO crystal can be considered as the simple mixture of BGO and BSO crystals.

关 键 词：闪烁晶体 坩埚下降法 BGSO 力学性能 

分 类 号：O78[理学—晶体学]