Interfacial morphology evolution of KTa1−xNbxO3crystal growth
Li, Shuhui1,2; Pan, Xiuhong1; Liu, Yan1; Jin, Weiqing1; Zhang, Minghui1; Yu, Jianding1
Source PublicationJournal of Crystal Growth
AbstractTwo-dimensional growth of Potassium tantalate niobate (KTa1−xNbxO3) crystals with x = 0.94 was visualized by a high-temperature in situ observation system. Moreover, the interfacial morphology evolution and the interfacial kinetics during crystal growth were systematically studied by optical microscope. It was found that a square-shaped crystal surrounded by {1 1 0} planes was formed in the melt with small undercooling degree, while a large amount of rod-shaped crystals along with [0 0 1] direction predominated under large undercooling conditions. XRD results proved the orthorhombic phase of both shaped crystals. Interfacial kinetics analysis demonstrated the two-dimensional nucleation mechanism in the growth of square-shaped crystal. In contrast, the rod-shaped crystals were inclined to the rough surface growth mechanism. Furthermore, the surface compositional distribution of the as-grown crystal was carried out by EMPA, indicating that rod-shaped crystals had a smaller composition fluctuation than the square-shaped one, mainly due to the depressed segregating effect by the faster growth rate. The analysis of the mechanism and performance can promote the understanding of the KTN crystal. © 2017 Elsevier B.V.
EI Accession Number20171303507807
EI KeywordsGrowth kinetics
EI Classification Number641.1 Thermodynamics - 931 Classical Physics ; Quantum Theory ; Relativity - 933.1.2 Crystal Growth - 951 Materials Science
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Document Type期刊论文
Affiliation1.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China;
2.University of Chinese Academy of Sciences, Beijing; 100039, China
Recommended Citation
GB/T 7714
Li, Shuhui,Pan, Xiuhong,Liu, Yan,et al. Interfacial morphology evolution of KTa1−xNbxO3crystal growth[J]. Journal of Crystal Growth,2017,467:77-81.
APA Li, Shuhui,Pan, Xiuhong,Liu, Yan,Jin, Weiqing,Zhang, Minghui,&Yu, Jianding.(2017).Interfacial morphology evolution of KTa1−xNbxO3crystal growth.Journal of Crystal Growth,467,77-81.
MLA Li, Shuhui,et al."Interfacial morphology evolution of KTa1−xNbxO3crystal growth".Journal of Crystal Growth 467(2017):77-81.
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