铁钛共掺强韧化蓝宝石晶体的研究  

A method to strengthen and toughen Sapphire by codoping of Fe/Ti ions

作　　者：胡克艳[1] 徐军[2] 唐慧丽[2] 李红军[2] 邹宇琦[2] 苏良碧[2] 陈伟超[2] 于海欧[1,2] 杨秋红[1] 

机构地区：[1]上海大学电子信息材料系,上海200072 [2]中国科学院上海硅酸盐研究所,上海201800

出　　处：《物理学报》2013年第6期363-368,共6页Acta Physica Sinica

基　　金：上海市科学技术委员会(批准号:10ZR1434200);国家自然科学基金(批准号:61177037)资助的课题~~

摘　　要：研究了铁钛共掺蓝宝石(Fe,Ti:Sapphire)晶体的常温力学性能.采用泡生法技术生长了尺寸为180×280mm3质量为30kg的Fe,Ti:Sapphire晶体.实验发现,在蓝宝石晶体中掺入Fe2O3和TiO2以及相应的热处理可以显著提高晶体常温断裂强度、表面硬度和断裂韧性,而不损害晶体的可见和近红外透过性能;掺入的Fe2O3其Fe3+对Al3+的取代作用导致晶体内应力的增加,掺入的TiO2其Ti4+热处理时结晶出的第二相针状晶体的韧化效应,均对Fe,Ti:Sapphire晶体的力学性能的提高具有重要作用.研究对我国实现高强蓝宝石晶体应用材料具有重要现实意义.Mechanical properties of titanium and iron co-doped Sapphire crystal are first studied at room temperature Large （？180 × 280 mm3 in dimension 30 kg in weight） titanium and iron codoped sapphire single crystal is grown by the Kyropoulos technique It is shown that the fracture strength and surface hardness and fracture toughness of as-grown crystals are significantly improved and the visible-infrared optical property is not adversely affected by titanium and iron codoping and certain heat treatment. The Fe3＋ in the doped Fe2O3 palys a role of substituting Al3＋, leading to an in creased internal stress in the crystal. And the Ti4＋ in the doped TiO2 crystallizes the second phase needle crystal and brings in a toughening effect through certain heat treatment. As a consequence, the mechanical properties of as-grown sapphire are improved at room temperature. The present work has the realistic significance for developing the sapphires of excellent mechanical properties.

关 键 词：蓝宝石晶体 力学性能 铁钛共掺 热处理 

分 类 号：TQ164[化学工程—高温制品工业]