Accurate Velocity Measurement of Periodic Striae of TiO2–SiO2 Glasses by the Line-Focus-Beam Ultrasonic Material-Characterization System
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概要
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The evaluation of periodic striae layers in TiO2–SiO2 ultra-low-expansion glasses, formed during production, is discussed through the measurement of leaky surface acoustic-wave (LSAW) velocities by the line-focus-beam (LFB) ultrasonic material-characterization system. The averaging effect associated with an LSAW propagation region interacting with periodic striae on a specimen surface was examined at 225 MHz, taking several specimens prepared with inclination angles of $\theta=0$, 2, 5, 10, 20, and 90° to the plane of striae layers with a periodicity of 0.16 mm. LSAW velocities corresponding to TiO2 concentrations in the glass were properly measured for the specimens with $\theta$ less than 10°, and the perpendicular specimen ($\theta=90$°) was suitable for accurate determination of the striae periodicities for LSAW propagation perpendicular to the striae plane.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2006-11-15
著者
-
OHASHI Yuji
Department of Chemistry and Materials Science Tokyo Institute of Technology
-
Kushibiki Jun-ichi
Deparment Of Electrical Engineering Faculty Of Engineering Tohoku University
-
Arakawa Mototaka
Department Of Electrical Engineering Tohoku University
-
Suzuki Kouji
Department of Electrical Engineering, Tohoku University
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