Ultrasonic monitoring of the molten zone during float zone refining of single crystal germanium

From National Research Council Canada

DOI	Resolve DOI: https://doi.org/10.1007/978-3-642-84003-6_91
Author	Search for: Jen, C. K.¹; Search for: Bussière, J. F.¹; Search for: De Heering, Ph.; Search for: Sutcliffe, P.
Affiliation	National Research Council of Canada
Format	Text, Book Chapter
Conference	3rd International Symposium on Nondestructive Characterization of Materials, October 3-6, 1988, Saarbrücken, FGR
Subject	shear wave; longtidinal wave; mode conversion; molten zone; float zone
Abstract	An ultrasonic pulse-echo method was investigated to monitor the float zone in a Ge rod during float zone refining. The feasibility of this method has been experimentally demonstrated for small diameter Ge rods, by using shear wave transducers cooled at about 30°C. It was shown that arrival times of the reflected signals from the solid-liquid Ge interface can be used for monitoring purposes and good resolution can be obtained for both zone position and thickness. Acoustic energy transfer at the solid-liquid interface, observed in the case of shear waves, is discussed in terms of multiple mode conversion. Effects of diffraction on received echoes of longitudinal and shear waves are described and analysed in terms of acoustic wave propagation in anisotropic Ge rods.
Publication date	1989-01-01
Publisher	Springer
In	Nondestructive Characterization of Materials: 788–795.
Language	English
Peer reviewed	Yes
NRC number	NRCC 29711 NRC-IGM88TC-401-697-G
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Record identifier	8c6d0a25-2927-4bc6-9a6a-e6826bc8339b
Record created	2020-05-02
Record modified	2020-06-10

Date modified:: 2024-07-18