Numerical and experimental investigation of crystal growth rate dependence on facet undercooling for dielectric crystal growth from the melt

BYKOVA, S. V ; GOLYSHEV, V. D ; et al.

In: Selected papers from the CHT-04 Conference, 19-24 April 2004, on cruise ship Midnastol, along the Norwegian CoastHeat transfer engineering 27(2):43-57; Jg. 27 (2006) 2, S. 43-57

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Combined experimental and numerical tools are developed and used to define more exactly the growth kinetic relations for (211) crystallographic orientation of Bi4Ge3O12 (BGO) crystal growth-namely, the dependence of crystal growth rate V on supercooling, AT of the melt/crystal interface. A new apparatus for in situ measurements of the time dependence of the supercooling, ΔT(t), was used, and a new, two-dimensional numerical model was applied to analyze the effect of temperature boundary conditions and faceting phenomena on the character of the observed V(ΔT) dependence. The measurements of the ΔT(t) dependence show that there is a large enough undercooling and a novel effect of the appearance of the local maximum on ΔT(t) dependence at the finish of crystallization. Results on V(ΔT) dependence show that, for the variant of the crystal growth technique used (melt cooling during axial heating process method [AHP]), the type of the V(ΔT) dependence does not depend on boundary conditions. The new investigations illustrate the superlinear behavior for V(ΔT) dependence for (211) BGO crystallographic orientation and show that previous data on sublinear behavior of V(AT) dependence for this crystallographic orientation of BGO have not been justified.

Titel:	Numerical and experimental investigation of crystal growth rate dependence on facet undercooling for dielectric crystal growth from the melt
Autor/in / Beteiligte Person:	BYKOVA, S. V ; GOLYSHEV, V. D ; GONIK, M. A ; TSVETOVSKY, V. B ; DESHKO, V. I ; KARVATSKII, A. Ya ; LENKIN, A. V
Link:	View record from PASCAL Archive
Quelle:	Selected papers from the CHT-04 Conference, 19-24 April 2004, on cruise ship Midnastol, along the Norwegian CoastHeat transfer engineering 27(2):43-57; Jg. 27 (2006) 2, S. 43-57
Veröffentlichung:	Philadelphia, PA: Taylor & Francis, 2006
Medientyp:	Konferenz
Umfang:	print, 24 ref
ISSN:	0145-7632 (print)
Schlagwort:	Energy Énergie Mechanical engineering Génie mécanique Mechanics acoustics Mécanique et acoustique Sciences exactes et technologie Exact sciences and technology Physique Physics Etat condense: structure electronique, proprietes electriques, magnetiques et optiques Condensed matter: electronic structure, electrical, magnetic, and optical properties Propriétés et matériaux diélectriques, piézoélectriques et ferroélectriques Dielectrics, piezoelectrics, and ferroelectrics and their properties Matériaux diélectriques, piézoélectriques, ferroélectriques et antiferroélectriques Dielectric, piezoelectric, ferroelectric and antiferroelectric materials Liquides et cristaux liquides Liquids and liquid crystals Domaines interdisciplinaires: science des materiaux; rheologie Cross-disciplinary physics: materials science; rheology Science des matériaux Materials science Méthodes de croissance cristalline; physique de la croissance cristalline Methods of crystal growth; physics of crystal growth Croissance en phase fondue; fusion de zone et purification de zone Growth from melts; zone melting and refining Liquids, emulsions, and suspensions; liquid crystals Croissance cristalline en phase fondue Crystal growth from melts Etude expérimentale Experimental study Interface croissance Growth interface Interfase crecimiento Interface liquide solide Liquid solid interface Interfase líquido sólido Matériau diélectrique Dielectric materials Simulation numérique Digital simulation Surfusion Supercooling Transfert chaleur Heat transfer
Sonstiges:	Nachgewiesen in: PASCAL Archive Sprachen: English Original Material: INIST-CNRS Document Type: Conference Paper File Description: text Language: English Author Affiliations: Center for Thermophysical Research Thermo,, Alexandrov, Russian Federation ; Heat Engineering Department, Kiev Polytechnic Institute, Kiev, Ukraine Rights: Copyright 2006 INIST-CNRS ; CC BY 4.0 ; Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS Notes: Physics and materials science ; Physics of condensed state: electronic structure, electrical, magnetic and optical properties

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