无机材料学报2017，Vol.32Issue(11)：1223-1227,5.DOI:10.15541/jim20170068
KTa1-xNbxO3晶体生长过程中气泡与界面的相互作用
Interactions Between Bubble and Interface During KTa1-xNbxO3 Crystal Growth
摘要
Abstract
The generation of bubbles and its interaction with the interface during melting and growth process of po-tassium tantalate niobate (KTa1-xNbxO3) crystals were visualized by a high temperature in-situ observation system. It was found that bubbles are generated mainly from the solid-liquid interface during melting, rather than from the melt. Bubbles with radii smaller than 0.7 r (where r is the mean radius of bubbles) arise mostly from nucleation at the interface while radii larger than 1.5 r are the result of coalescence. The existence of the bubble not only lowers the growth velocity of the near interface, but also affects the structure of the crystal. The effect of a bubble on the growing interface depends on their dimension ratio together with the moving speed of the interface. There are three typical kinds (hat-, sphere- and ellipsoid-shaped) of vapor inclusion morphologies being demonstrated. The analysis of the bubble behavior can promote the understanding of the formation of inclusion defects in KTN crystal growth process.关键词
钽铌酸钾/晶体生长/气泡/实时观察/CTKey words
potassium tantalate niobate/crystal growth/bubble/in situ observation/computed tomography分类
数理科学引用本文复制引用
李淑慧,潘秀红,刘岩,金蔚青,张明辉,余建定,陈锟,艾飞..KTa1-xNbxO3晶体生长过程中气泡与界面的相互作用[J].无机材料学报,2017,32(11):1223-1227,5.基金项目
National Natural Science Foundation of China (51472263, 51602330) （51472263, 51602330）
Shanghai Sailing Program (16YF1413100) （16YF1413100）
