Presentation	2011-01-21 Homogeneity Evaluation of a Synthetic Silica Glass Ingot by the Ultrasonic Microspectroscopy Technology Jun-ichi KUSHIBIKI, Mototaka ARAKAWA, Yuji OHASHI, Yuko MARUYAMA, Hideharu HORIKOSHI, Kenji MORIYAMA,
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Abstract(in English)	Homogeneities of a synthetic silica glass ingot were evaluated by the ultrasonic microspectroscopy technology. Specimens prepared from around the central axis of the ingot were heat-treated at desired annealing temperatures from 900 to 1150℃. Longitudinal velocities (V_l), leaky surface acoustic wave (LSAW) velocities (V_), and densities (p) were measured to obtain relationships between acoustic properties and fictive temperatures T_f. Then, distributions of V_ and V_l were measured along the radial direction of the ingot. OH concentrations and T_f were measured by infrared spectroscopy. Optical retardations were also measured by optical heterodyne interferometry. From the results, we demonstrated that T_f distributions of glass ingot can be obtained by V_l measurements and variations caused by the residual stresses could be evaluated by V_ measurements.
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Keyword(in English)	ultrasonic micro-spectroscopy technology / synthetic silica glass / fictive temperature / longitudinal velocity / leaky surface acoustic wave velocity / density
Paper #	US2010-108
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Committee	US
Conference Date	2011/1/13(1days)
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Paper Information
Registration To	Ultrasonics (US)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	Homogeneity Evaluation of a Synthetic Silica Glass Ingot by the Ultrasonic Microspectroscopy Technology
Sub Title (in English)
Keyword(1)	ultrasonic micro-spectroscopy technology
Keyword(2)	synthetic silica glass
Keyword(3)	fictive temperature
Keyword(4)	longitudinal velocity
Keyword(5)	leaky surface acoustic wave velocity
Keyword(6)	density
1st Author's Name	Jun-ichi KUSHIBIKI
1st Author's Affiliation	Graduate School of Engineering, Tohoku University()
2nd Author's Name	Mototaka ARAKAWA
2nd Author's Affiliation	Graduate School of Engineering, Tohoku University
3rd Author's Name	Yuji OHASHI
3rd Author's Affiliation	Graduate School of Engineering, Tohoku University
4th Author's Name	Yuko MARUYAMA
4th Author's Affiliation	Graduate School of Engineering, Tohoku University
5th Author's Name	Hideharu HORIKOSHI
5th Author's Affiliation	Tosoh SGM Corporation
6th Author's Name	Kenji MORIYAMA
6th Author's Affiliation	Tosoh SGM Corporation
Date	2011-01-21
Paper #	US2010-108
Volume (vol)	vol.110
Number (no)	366
Page	pp.pp.-
#Pages	6
Date of Issue