扩镁铌酸锂单晶光纤的微观结构分析  

MICROSTRUCTURAL ANALYSES OF THE MAGNESIUM DIFFUSED LITHIUM NIOBATE SINGLE CRYSTAL FIBER

作　　者：阙文修[1] 姚熹[1] 霍玉晶[2] 

机构地区：[1]西安交通大学电子材料研究室 [2]清华大学电子工程系

出　　处：《硅酸盐学报》1997年第2期214-218,共5页Journal of The Chinese Ceramic Society

基　　金：西安交通大学精细功能电子材料与元器件实验室开放基金

摘　　要：通过电子探针显微分析表明，铌酸锂单晶光纤经镁离子内扩散后，镁离子已完全扩散进晶纤内部，且扩散层镁离子浓度呈现抛物线形分布。通过常规Ｘ射线衍射和ＬａｕｅＸ射线衍射照相证明：铌酸锂单晶光纤并不因镁离子的进入而破坏其晶体特性，而是保持了完好的单晶结构。对这一扩镁晶纤的两端面和侧表面经２ＨＮＯ３＋１ＨＦ的混合酸液腐蚀后，利用扫描电镜观察表明：控制好合适的扩散参数可保证晶纤的畴结构不发生变化，即保持单畴结构。A magnesium ion indiffusion process is applied to lithium niobate single crystal fiber.Electron probe microanalysis shows that magnesium ions have been diffused into the bulk of crystal fiber,and magnesium ion concentration of the magnesium diffused layer show a parabolic distribution.It is proved by conventional X ray diffraction and Laue X ray diffraction that magnesium ion indiffusion does not affect the crystalline property of crystal fiber and single crystal structure of the crystal fiber still remains well.After diffused and etched in 2HNO 3+1HF solution at room temperature for about 4h,the domain structure of the fiber is observed using scanning electron microscopy and single domain structure can be obtained by controlling suitable diffusion parameters.

关 键 词：铌酸锂 单晶光纤 畴结构 腐蚀 光学纤维 

分 类 号：TN25[电子电信—物理电子学]