Development of a method for measuring precise temperature dependence of acoustic properties for langasite-type single crystals
| Project/Area Number |
25420399
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Measurement engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
OHASHI Yuji 東北大学, 金属材料研究所, 助教 (50396462)
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| Co-Investigator(Kenkyū-buntansha) |
KARAKI Tomoaki 富山県立大学, 工学部, 准教授 (10254236)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 精密超音波計測 / ランガサイト系単結晶 / 音響関連物理定数 / 温度係数 / 圧電デバイス |
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| Outline of Final Research Achievements |
In this research, we proposed and demonstrated a method for determining constants and temperature coefficients by a new method using our ultrasonic micro-spectroscopy (UMS) technology combined with the pulse-echo and resonance methods to overcome the problem that some of the constants measured by resonance method have significant errors. The temperature dependences of bulk wave velocities for langasite-type single crystals (CTGS) were measured at around room temperature with the UMS technology and at the temperature range from -30 to 80°C with pulse-echo and resonance methods. The temperature dependences of elastic and piezoelectric constants were determined from the velocities calibrated with the accurate results of the UMS. The gradients of the constants determined were in good agreement with those for the UMS at around room temperatures. We successfully demonstrated a method of determining accurate constants with their temperature coefficients.
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Report
(4 results)
Research Products
(18 results)
