Determination method of acoustical physical constants and their temperature coefficients of La3Ta0.5Ga5.3Al 0.2O14 single crystal

Yuji Ohashi, Hitoshi Yoshida, Mototaka Arakawa, Jun Ichi Kushibiki, Tomoaki Karakai, Tao Lv, Masatoshi Adachi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

A determination method of accurate acoustical physical constants and their temperature coefficients was demonstrated for La3Ta 0.5Ga5.3Al0.2O14 (LTGA) single crystal using the ultrasonic microspectroscopy (UMS) technology combined with the resonance method. Several specimens (X-, Y-, Z-, 29.14°Y-, and 150.86°Y-cut) were prepared from an LTGA ingot. Acoustical physical constants and their temperature coefficients around room temperatures were determined using the longitudinal-and shear-wave velocities measured by the UMS system, dielectric constants, density, and thermal expansion coefficients. Measured leaky surface acoustic wave (LSAW) velocities and calculated ones using the determined constants at 23°C were compared, resulting in good agreement within-3.0 to 1.1 m/s for all propagation directions. Using four X-cut rotated Y-bar (-30°Y, 0°Y, 15°Y, 30°Y) specimens and Y-cut specimen prepared from the same ingot, the temperature coefficients in a range from-30 to 80°C were also obtained by the resonance method. Combining the temperature coefficients obtained by the resonance method with the accurate constants obtained by the UMS technology, we can determine more reliable constants and temperature coefficients.

Original languageEnglish
Title of host publication2012 IEEE International Ultrasonics Symposium, IUS 2012
Pages2738-2741
Number of pages4
DOIs
Publication statusPublished - 2012
Event2012 IEEE International Ultrasonics Symposium, IUS 2012 - Dresden, Germany
Duration: 2012 Oct 72012 Oct 10

Publication series

NameIEEE International Ultrasonics Symposium, IUS
ISSN (Print)1948-5719
ISSN (Electronic)1948-5727

Other

Other2012 IEEE International Ultrasonics Symposium, IUS 2012
CountryGermany
CityDresden
Period12/10/712/10/10

Keywords

  • LaTaGaAl O (LTGA) single crystal
  • acoustical physical constants
  • resonance method
  • temperature coefficients
  • ultasonic micro-spectroscopy technology

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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