| Presentation | 2012-08-27 Determination Method of Acoustical Physical Constants and Their Temperature Coefficients of La_3Ta_<0.5>Ga_<5.3>Al_<0.2>O_<14> Single Crystal Yuji OHASHI, Tomoaki KARAKI, Hitoshi YOSHIDA, Tao LV, Mototaka ARAKAWA, Masatoshi ADACHI, Jun-ichi KUSHIBIKI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We proposed a determination method of accurate acoustical physical constants and their temperature coefficients for La_3Ta_<0.5>Ga_<5.3>Al_<0.2>O_<14> (LTGA) single crystal using the ultrasonic microspectroscopy (UMS) technology combined with the resonance method. Acoustic properties were measured at 20, 23, and 26℃ by the UMS system for X-, Y-, Z-, 29.14°Y-, and 150.86°Y-cut specimens prepared from an LTGA ingot. Using the measured results (longitudinal- and shear-wave velocities, dielectric constants, density, and thermal expansion coefficients), we determined acoustical physical constants and their temperature coefficients around room temperatures. To confirm the accuracy of the determined constants, we compared the measured LSAW velocities and calculated ones using the determined constants at 23℃, 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, -15°Y, 0°Y, +30°Y) specimens and Y-cut specimen prepared from the same ingot, we also obtained the temperature coefficients in a range from -30 to +80℃ by the resonance method. Combining the temperature coefficients obtained by the resonance method with the absolute values of constants obtained by the UMS technology, we can determine more reliable constants and temperature coefficients. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | La_3Ta_<0.5>Ga_<5.3>Al_<0.2>O_<14> (LTGA) single crystal / acoustical physical constants / temperature coefficient / ultrasonic microspectroscopy technology / resonance method |
| Paper # | US2012-38 |
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| Committee | US |
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| Conference Date | 2012/8/20(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Ultrasonics (US) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Determination Method of Acoustical Physical Constants and Their Temperature Coefficients of La_3Ta_<0.5>Ga_<5.3>Al_<0.2>O_<14> Single Crystal |
| Sub Title (in English) | |
| Keyword(1) | La_3Ta_<0.5>Ga_<5.3>Al_<0.2>O_<14> (LTGA) single crystal |
| Keyword(2) | acoustical physical constants |
| Keyword(3) | temperature coefficient |
| Keyword(4) | ultrasonic microspectroscopy technology |
| Keyword(5) | resonance method |
| 1st Author's Name | Yuji OHASHI |
| 1st Author's Affiliation | Graduate School of Engineering, Tohoku University() |
| 2nd Author's Name | Tomoaki KARAKI |
| 2nd Author's Affiliation | Faculty of Engineering, Toyama Prefectural University |
| 3rd Author's Name | Hitoshi YOSHIDA |
| 3rd Author's Affiliation | Graduate School of Engineering, Tohoku University |
| 4th Author's Name | Tao LV |
| 4th Author's Affiliation | Faculty of Engineering, Toyama Prefectural University |
| 5th Author's Name | Mototaka ARAKAWA |
| 5th Author's Affiliation | Graduate School of Engineering, Tohoku University |
| 6th Author's Name | Masatoshi ADACHI |
| 6th Author's Affiliation | Faculty of Engineering, Toyama Prefectural University |
| 7th Author's Name | Jun-ichi KUSHIBIKI |
| 7th Author's Affiliation | Graduate School of Engineering, Tohoku University |
| Date | 2012-08-27 |
| Paper # | US2012-38 |
| Volume (vol) | vol.112 |
| Number (no) | 186 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |