NDLI: Evaluation of glass materials by using the line-focus-beam ultrasonic-material-characterization system

Content Provider	IEEE Xplore Digital Library
Author	Kushibiki, J. Arakawa, M. Ohashi, Y. Okabe, R.
Copyright Year	1986
Abstract	We developed experimental procedures to evaluate glass materials using the line-focus-beam ultrasonic-material-characterization (LFB-UMC) system. We prepared 28 specimens of a commercial borosilicate glass from random lots, and measured the velocities of leaky-surface acoustic waves (LSAWs) and leaky-surface-skimming compressional waves (LSSCWs), V/sub LSAW/ and V/sub LSSCW/, using V(z) curve measurements at 225 MHz and 23/spl deg/C. The velocities for V/sub LSAW/ ranged from 3121.83 m/s to 3149.77 m/s, with a maximum deviation of 27.94 m/s. The velocities for V/sub LSSCW/ ranged from 5547.7 m/s to 5585.0 m/s, with a maximum deviation of 37.3 m/s. To investigate these observed variations in V/sub LSAW/ and V/sub LSSCW/ we measured the bulk acoustic wave (BAW) properties, viz., longitudinal and shear velocities, then the densities and the chemical compositions of 8 of the 28 specimens. The LFB-UMC measurements confirmed that decreases in V/sub LSAW/ and V/sub LSSCW/ occur mainly with the B/sub 2/O/sub 3/ dopant concentrations, corresponding to the decrease of shear-wave and longitudinal-wave velocities that are caused by the decrease of the stiffness constants c/sub 44/ and c/sub 11/, respectively, rather than with decreased densities. The sensitivities are -6.36 /spl times/ 10/sup -2/ wt%/(m/s) for V/sub LSAW/ and -4.87 /spl times/ 10/sup -2/ wt%/(m/s) for V/sub LSSCW/. This demonstrates that the LFB-UMC system is effective for evaluating glass materials and controlling production processes, by analyzing variations in chemical composition through the super-accurate velocity measurements of LSAWs and LSSCWs.
Starting Page	1152
Ending Page	1160
Page Count	9
File Size	347794
File Format	PDF
ISSN	08853010
Volume Number	52
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Glass Velocity measurement Acoustic measurements Ultrasonic variables measurement Acoustic waves Density measurement Chemical analysis Composite materials Velocity control Process control
Content Type	Text
Resource Type	Article
Subject	Acoustics and Ultrasonics Instrumentation Electrical and Electronic Engineering

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