High-accuracy standard specimens for the line-focus-beam ultrasonic material characterization system

Jun Ichi Kushibiki, Mototaka Arakawa, Ryoichi Okabe

研究成果: Article査読

42 被引用数 (Scopus)

抄録

We prepared standard specimens for the linefocus-beam ultrasonic material characterization system to obtain absolute values of the propagation characteristics (phase velocity and attenuation) of leaky surface acoustic waves (LSAWs). The characterization system is very useful for evaluating and analyzing specimen surfaces. The calibration accuracy of these acoustic parameters depends on the accuracy of acoustical physical constants (elastic constants, piezoelectric constants, dielectric constants, and density) determined for standard specimens. In this paper, we developed substrates of nonpiezoelectric single crystals (viz., gadolinium gallium garnet [GGG], Si, and Ge) and an isotropic solid (synthetic silica [SiO 2] glass) as standard specimens. These specimens can cover the phase velocity range of 2600 to 5100 m/s for Rayleigh-type LSAWs. To determine the elastic constants with high accuracy, we measured velocities by the complex-mode measurement method and corrected diffraction effects. Measurements of bulk acoustic properties (bulk wave velocity and density) were conducted around 23°C, and bulk wave velocities were obtained with an accuracy of within ±0.004%. We clearly detected differences in acoustic properties by comparing the obtained results with the previously published values; the differences were considered to be due to differences of the specimens used. We also detected differences in acoustic properties among four SiO 2 substrates produced by different manufacturers.

本文言語English
ページ(範囲)827-835
ページ数9
ジャーナルIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
49
6
DOI
出版ステータスPublished - 2002 6

ASJC Scopus subject areas

  • 器械工学
  • 音響学および超音波学
  • 電子工学および電気工学

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