摘要
设计了一套显微实时观测系统,分析了Z切向ADP晶体成锥过程中形成的薄表面层的生长动力学。通过实时记录成锥薄表面层的切向速度,得到了成锥薄层生长速度随过饱和度的变化曲线。计算出了成锥薄层生长相关动力学系数,发现Fe3+掺杂可以提高薄表面层的切向生长速度,从而加速Z切向ADP晶体的成锥过程。扫描电镜断口形貌显示薄表面层内部存在很多大尺寸缺陷。利用高分辨X射线衍射,测量了掺杂和未掺杂Fe3+成锥薄层样品的单晶摇摆曲线,发现Fe3+掺杂没有降低薄层的结晶质量。
An in-situ microscopic observation system was designed to analyze the growth kinetics of the thin surface layers formed in the regeneration of Z-cut ADP crystals. The curves of tangential growth rate of the thin surface layers dependence of supersaturation were obtained by in-situ recording the advancement of the leading edges in the tangential direction, and corresponding kinetics coefficients were calculated. It was found that Fe^3＋ significantly increased the tangential growth velocity of the thin surface and speeded up the regeneration process of Z-cut ADP crystal. The fracture morphology of the thin surface layers were observed by scanning electron microscope （SEM） and many large size defects were found. The crystalline quality of the thin surface layers grown from pure and Fe^3＋ doped growth solutions were evaluated by high-resolution X-ray diffraction, and the rocking curves showed no quality degradation after doped Fe^3 ＋.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2010年第B06期59-63,共5页
Journal of Synthetic Crystals
基金
国家自然科学基金(No.10774081
No.10304009)
国家光电子晶体材料工程技术研究中心开放基金(2007K08)
山东省自然科学基金(Y2007F16)
关键词
ADP晶体
薄表面层
动力学系数
ADP crystal
thin surface layers
kinetic coefficient
