Methods and systems for monitoring a solid-liquid interface

Stoddard, Nathan G; Clark, Roger F; Kary, Tim

Title: Methods and systems for monitoring a solid-liquid interface

Patent · Tue Jul 20 00:00:00 EDT 2010

OSTI ID:1012826

Stoddard, Nathan G ^[1]; Clark, Roger F ^[2]; Kary, Tim ^[3]

Gettysburg, PA
Frederick, MD
Union Bridge, MD

Methods and systems are provided for monitoring a solid-liquid interface, including providing a vessel configured to contain an at least partially melted material; detecting radiation reflected from a surface of a liquid portion of the at least partially melted material that is parallel with the liquid surface; measuring a disturbance on the surface; calculating at least one frequency associated with the disturbance; and determining a thickness of the liquid portion based on the at least one frequency, wherein the thickness is calculated based on.times. ##EQU00001## where g is the gravitational constant, w is the horizontal width of the liquid, and f is the at least one frequency.

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Research Organization:: BP Corporation North America Inc (Warrenville, IL)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC36-98GO10337

Assignee:: BP Corporation North America Inc (Warrenville, IL)

Patent Number(s):: 7,758,696

Application Number:: 12/233,694

OSTI ID:: 1012826

Country of Publication:: United States

Language:: English

References (5)

A theoretical analysis of the laser melt-level monitoring system for the Czochralski crystal growing furnaces Li, Zhixin; Koziol, J. IEEE Transactions on Instrumentation and Measurement, Vol. 46, Issue 3, p. 722-730 https://doi.org/10.1109/19.585441	journal	June 1997
Laser ultrasonic sensing of the melting and solidification of cadmium telluride Queheillalt, Douglas T.; Wadley, Haydn N. G. Journal of Crystal Growth, Vol. 225, Issue 1 https://doi.org/10.1016/S0022-0248(01)01027-2	journal	May 2001
Application of pulse-echo ultrasonics to locate the solid/liquid interface during solidification and melting Parker, R. L.; Manning, J. R. Journal of Crystal Growth, Vol. 79, Issue 1-3 https://doi.org/10.1016/0022-0248(86)90460-4	journal	December 1986
Ultrasonic evaluation of semi-solid metals during processing Jen, C-K; Liaw, J-W; Chen, T-F Measurement Science and Technology, Vol. 11, Issue 11 https://doi.org/10.1088/0957-0233/11/11/305	journal	October 2000
Localization of the Solid/Liquid Interface during Directional Solidification of Silicon by a Pulse-Echo Ultrasonic Technique Eyer, A.; Haas, F.; Schätzte, P. Tenth E.C. Photovoltaic Solar Energy Conference https://doi.org/10.1007/978-94-011-3622-8_75	book	January 1991

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