| Original Articles |
|
|
|
|
Growth of NaBi(WO4)2 Dendrite and Mechanism |
| HONG Yong1;AI Fei1;PAN Xiu-Hong1;JIN Wei-Qing1;ZHONG Wei-Zhuo1;SHINICHI Yoda2 |
| 1Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050
2Space Utilization Research Center, Office of Space Utilization System, JAXA, 2-2-1, Sengen, Tsukuba, Ibaraki 305, Japan |
|
| Cite this article: |
|
HONG Yong, AI Fei, PAN Xiu-Hong et al 2006 Chin. Phys. Lett. 23 2841-2844 |
|
|
|
Abstract The solid--liquid interface motion of NaBi(WO4)2 (NBWO) melt crystal growth is observed in an in situ system, in which the whole processes of interface transition from flat interface and cellular to dendrite are visualized. The spacing of the dendrite under smaller temperature gradient turns out to be larger than that under larger temperature gradient, which is found to be sensitive to the temperature distribution. The mechanism of dendrite growth of NBWO is studied based on the model of the growth units of anion coordination polyhedra. The {001} face has two apex links, so it shows higher stability and has high growth rate and forms the arm of dendrite, whereas the {010} face has only one apex link, and thus shows relative slower growth rate and firstly forms the branches.
|
| Keywords:
68.70.+w
81.10.Aj
47.20.Hw
|
|
|
Published: 01 October 2006
|
|
| PACS: |
68.70.+w
|
(Whiskers and dendrites (growth, structure, and nonelectronic properties))
|
| |
81.10.Aj
|
(Theory and models of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)
|
| |
47.20.Hw
|
(Morphological instability; phase changes)
|
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
