Surface Structure and X-ray Topography of $NdAl_3(BO_3)_4$ Single Crystals Grown from High Temperature Solution of $BaO-B_2O_3-Nd_2O_3-Al_2O_3$ System

$BaO-B_2O_3-Nd_2O_3-Al_2O_3$계 고온 용액으로부터 성장된 $NdAl_3(BO_3)_4$ 단결정의 표면구조와 X-선 Topography

  • 정선태 (서울대학교 무기재료공학과) ;
  • 강진기 (서울대학교 무기재료공학과) ;
  • 김정환 (서울대학교 무기재료공학과) ;
  • 정수진 (서울대학교 무기재료공학과)
  • Published : 1994.03.01

Abstract

By surface structure and X-ray topographic observation, growth mechanism of NAB single crystal grown by TSSG technique using a BaB4O7 flux was studied. Surface structure of grown crystals were investigated by optical microscope. Growth history and crystal defects included within grown crystal were investigated using X-ray topography. The {001} faces were grown by 2-D nucleation growth. As decreasing cooling rate, growth mechanism of {111} and {11} was changed from 2-D nucleation growth to the growth by screw dislocation. Only surface striations developed parallel to a-axis were observed on {010} faces. Growth sector of NAB crystals were divided into {001}, {111}, {010}, {021}, {11}. The inclusion which was usually trapped between {001} faces was investigated.

Keywords

References

  1. J. Cryst. Growth Crystal Growth and X-ray Topography of NdAl₃(BO₃)₄ S.T. Jung;J.K. Kang;S.J. Chung
  2. J. Kor. Ceram. Soc. v.30 no.8 소형고체 레이저용 NdAl₃(BO₃)₄단결정 육성 정선태;강진기;김정환;정수진
  3. Current Topics in Materials Science v.4 G. Huber;E. Kaldis(ed.)
  4. Mat. Res. Bull. v.9 Crystal Structure and Fluorescence Lifetime of NdAl₃(BO₃)₄,a Promising Laser Materials H. Y-P Hong;K. Dwight
  5. Phil.Tran v.A243 The Growth of Crystals and the Equilibrium Structure of their Surfaces Burton, W.K.;Cabrera N;Frank, F.C.
  6. Diffraction and Imaging Techniques in Material Science Techques and Interpretation in X-ray Topography A.R. Lang;S. Amelincks(ed.);R. Gevers(ed.);J. Van Landuyt(ed.)
  7. J. Cryst. Growth v.47 Epitaxy of NdAl₃(BO₃)₄for Thin Film Miniature Lasers F. Lutz;M. Leiss;J. Muller
  8. Modern Crystallography Ⅲ Mass and Heat Transport,Growth Shape and Their Stability A.A. Chernov;A.A. Chernov(ed.)
  9. Morphology of Crystals Morphology of Minerals I. Sunagawa;I.Sunagawa(ed.)
  10. Crystal Growth from High Temperature Solutions D. Elwell(ed.);H.J. Scheel(ed.)
  11. J. Cryst Growth v.100 Growth,Morphlogical and Structural Investigations of Neodymium Aluminum Borate Crystals from Different Flux Systems J. Kumak;M. Thirumavalavan;F.D. Gnanam;P. Ramasamy;G. Bocelli
  12. J.Cryst Growth v.48 The Effect of Substrate Orientation on the Growth Kinetics of Garnet Liquid Phase Epitaxy W. van Erk;H.J.G.J. van Hoek-martens;G. Bartels
  13. Diffraction and Imaging Techniques in Material Science Contrast of Images in X-ray Topography A. Autier;S. Amelincks(ed.);R. Gevers(ed.);J. van Landuyt(ed.)
  14. Morphology of Crystals Transition from Polyhedral to Dendritic Morphology T. Kuroda;T. Irisawa;A. Ookawa;I.Sunagawa(ed.)
  15. J. Cryst. Growth v.89 Relationship Between Crystal Growth,Structure and Spectral Characteristics of NdAl₃(BO₃)₄with Order-Disorder Structure C. Chen
  16. Crystal Growth from High Temperature Solutions D. Elwell(ed.);H.J. Scheel(ed.)
  17. Characterization of Crystal Growth Defects by X-ray Methods H. Klapper;B.K. Tanner(Ed.);D.K. Brown(ed.)