講演抄録/キーワード |
講演名 |
2012-08-27 13:40
Determination Method of Acoustical Physical Constants and Their Temperature Coefficients of La<sub>3</sub>Ta<sub>0.5</sub>Ga<sub>5.3</sub>Al<sub>0.2</sub>O<sub>14</sub> Single Crystal ○Yuji Ohashi(Tohoku Univ.)・Tomoaki Karaki(Toyama Pref. Univ.)・Hitoshi Yoshida(Tohoku Univ.)・Tao Lv(Toyama Pref. Univ.)・Mototaka Arakawa(Tohoku Univ.)・Masatoshi Adachi(Toyama Pref. Univ.)・Jun-ichi Kushibiki(Tohoku Univ.) US2012-38 |
抄録 |
(和) |
We proposed a determination method of accurate acoustical physical constants and their temperature coefficients for La3Ta0.5Ga5.3Al0.2O14 (LTGA) single crystal using the ultrasonic microspectroscopy (UMS) technology combined with the resonance method. Acoustic properties were measured at 20, 23, and 26°C 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°C, 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°C 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. |
(英) |
We proposed a determination method of accurate acoustical physical constants and their temperature coefficients for La3Ta0.5Ga5.3Al0.2O14 (LTGA) single crystal using the ultrasonic microspectroscopy (UMS) technology combined with the resonance method. Acoustic properties were measured at 20, 23, and 26°C 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°C, 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°C 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. |
キーワード |
(和) |
/ / / / / / / |
(英) |
La3Ta0.5Ga5.3Al0.2O14 (LTGA) single crystal / acoustical physical constants / temperature coefficient / ultrasonic microspectroscopy technology / resonance method / / / |
文献情報 |
信学技報, vol. 112, no. 186, US2012-38, pp. 23-26, 2012年8月. |
資料番号 |
US2012-38 |
発行日 |
2012-08-20 (US) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
PDFダウンロード |
US2012-38 |
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