Modeling optical floating zone crystal growth in a high-pressure, single-lamp furnace

Scott S. Dossa; Jeffrey J. Derby

doi:10.1016/j.jcrysgro.2022.126723

Modeling optical floating zone crystal growth in a high-pressure, single-lamp furnace

Scott S. Dossa, Jeffrey J. Derby

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

An optical floating zone (OFZ) model is developed, validated, and applied to obtain initial results for crystal growth in a novel high-pressure, single-lamp furnace. Computation with a realistic irradiation profile for zone heating results in dramatically different growth behavior than predicted using idealized Gaussian heating, though the discontinuities of the realistic profile prove challenging from a computational perspective. System pressure significantly affects buoyant flows in the surrounding atmosphere. Both driving force and flow strength increase nonlinearly with pressure, with the Grashof number growing with the cube of pressure and the Reynolds number scaling with pressure to the 3/2 power. For pressures of 100 bar and greater, flows of the surrounding phase strongly cool the growth sample, leading to significantly shorter melt zones, more deflected melt-solid interfaces, and weaker flows in the melt zone. Such effects reduce the likelihood of achieving stable growth conditions under very high pressure in this OFZ system.

Original language	English (US)
Article number	126723
Journal	Journal of Crystal Growth
Volume	591
DOIs	https://doi.org/10.1016/j.jcrysgro.2022.126723
State	Published - Aug 1 2022

Bibliographical note

Funding Information:
We acknowledge assistance from the entire Goma team at the University of New Mexico, particularly Andrew Cochrane, for insight and helpful discussions. We thank Hanna Dabkowska (McGill University) and John Mitchell (Argonne National Laboratory) for initial advice and encouragement. SSD would like to thank Scientific Instruments Dresden GmbH (ScIDre) for support to attend the 3rd Workshop on the Floating Zone Technique, Oxford University, September 16–18, 2019.

Publisher Copyright:
© 2022

Keywords

A1. Computer simulation
A1. Convection
A1. Fluid flows
A1. Heat transfer
A2. Floating zone technique
B1. Oxides

Publisher link

10.1016/j.jcrysgro.2022.126723

Find It

Find It at U of M Libraries

Cite this

@article{3fcf348a6a8347a19730d7113d885a83,

title = "Modeling optical floating zone crystal growth in a high-pressure, single-lamp furnace",

abstract = "An optical floating zone (OFZ) model is developed, validated, and applied to obtain initial results for crystal growth in a novel high-pressure, single-lamp furnace. Computation with a realistic irradiation profile for zone heating results in dramatically different growth behavior than predicted using idealized Gaussian heating, though the discontinuities of the realistic profile prove challenging from a computational perspective. System pressure significantly affects buoyant flows in the surrounding atmosphere. Both driving force and flow strength increase nonlinearly with pressure, with the Grashof number growing with the cube of pressure and the Reynolds number scaling with pressure to the 3/2 power. For pressures of 100 bar and greater, flows of the surrounding phase strongly cool the growth sample, leading to significantly shorter melt zones, more deflected melt-solid interfaces, and weaker flows in the melt zone. Such effects reduce the likelihood of achieving stable growth conditions under very high pressure in this OFZ system.",

keywords = "A1. Computer simulation, A1. Convection, A1. Fluid flows, A1. Heat transfer, A2. Floating zone technique, B1. Oxides",

author = "Dossa, {Scott S.} and Derby, {Jeffrey J.}",

note = "Funding Information: We acknowledge assistance from the entire Goma team at the University of New Mexico, particularly Andrew Cochrane, for insight and helpful discussions. We thank Hanna Dabkowska (McGill University) and John Mitchell (Argonne National Laboratory) for initial advice and encouragement. SSD would like to thank Scientific Instruments Dresden GmbH (ScIDre) for support to attend the 3rd Workshop on the Floating Zone Technique, Oxford University, September 16–18, 2019. Publisher Copyright: {\textcopyright} 2022",

year = "2022",

month = aug,

day = "1",

doi = "10.1016/j.jcrysgro.2022.126723",

language = "English (US)",

volume = "591",

journal = "Journal of Crystal Growth",

issn = "0022-0248",

publisher = "Elsevier",

}

TY - JOUR

T1 - Modeling optical floating zone crystal growth in a high-pressure, single-lamp furnace

AU - Dossa, Scott S.

AU - Derby, Jeffrey J.

N1 - Funding Information: We acknowledge assistance from the entire Goma team at the University of New Mexico, particularly Andrew Cochrane, for insight and helpful discussions. We thank Hanna Dabkowska (McGill University) and John Mitchell (Argonne National Laboratory) for initial advice and encouragement. SSD would like to thank Scientific Instruments Dresden GmbH (ScIDre) for support to attend the 3rd Workshop on the Floating Zone Technique, Oxford University, September 16–18, 2019. Publisher Copyright: © 2022

PY - 2022/8/1

Y1 - 2022/8/1

N2 - An optical floating zone (OFZ) model is developed, validated, and applied to obtain initial results for crystal growth in a novel high-pressure, single-lamp furnace. Computation with a realistic irradiation profile for zone heating results in dramatically different growth behavior than predicted using idealized Gaussian heating, though the discontinuities of the realistic profile prove challenging from a computational perspective. System pressure significantly affects buoyant flows in the surrounding atmosphere. Both driving force and flow strength increase nonlinearly with pressure, with the Grashof number growing with the cube of pressure and the Reynolds number scaling with pressure to the 3/2 power. For pressures of 100 bar and greater, flows of the surrounding phase strongly cool the growth sample, leading to significantly shorter melt zones, more deflected melt-solid interfaces, and weaker flows in the melt zone. Such effects reduce the likelihood of achieving stable growth conditions under very high pressure in this OFZ system.

AB - An optical floating zone (OFZ) model is developed, validated, and applied to obtain initial results for crystal growth in a novel high-pressure, single-lamp furnace. Computation with a realistic irradiation profile for zone heating results in dramatically different growth behavior than predicted using idealized Gaussian heating, though the discontinuities of the realistic profile prove challenging from a computational perspective. System pressure significantly affects buoyant flows in the surrounding atmosphere. Both driving force and flow strength increase nonlinearly with pressure, with the Grashof number growing with the cube of pressure and the Reynolds number scaling with pressure to the 3/2 power. For pressures of 100 bar and greater, flows of the surrounding phase strongly cool the growth sample, leading to significantly shorter melt zones, more deflected melt-solid interfaces, and weaker flows in the melt zone. Such effects reduce the likelihood of achieving stable growth conditions under very high pressure in this OFZ system.

KW - A1. Computer simulation

KW - A1. Convection

KW - A1. Fluid flows

KW - A1. Heat transfer

KW - A2. Floating zone technique

KW - B1. Oxides

UR - http://www.scopus.com/inward/record.url?scp=85133895741&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85133895741&partnerID=8YFLogxK

U2 - 10.1016/j.jcrysgro.2022.126723

DO - 10.1016/j.jcrysgro.2022.126723

M3 - Article

AN - SCOPUS:85133895741

SN - 0022-0248

VL - 591

JO - Journal of Crystal Growth

JF - Journal of Crystal Growth

M1 - 126723

ER -

Modeling optical floating zone crystal growth in a high-pressure, single-lamp furnace

Abstract

Bibliographical note

Keywords

Publisher link

Find It

Other files and links

Fingerprint

Cite this