2022年5月31日
LiNbO3-based sol-gel composite ultrasonic transducer poled at low temperatures
Japanese Journal of Applied Physics
- ,
- ,
- ,
- 巻
- 61
- 号
- 5G
- 開始ページ
- SG1060-1
- 終了ページ
- SG1060-6
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.35848/1347-4065/ac5720
A LiNbO3 (LN) based sol-gel composite could be suitable for high temperature ultrasonic transducer application at 700 °C, however, poling requires high temperature above 550 °C and it shows relatively low signal strength. In order to realize the polarization temperature reduction of an LN-based sol-gel composite ultrasonic transducer, alumina (AO) and strontium doped titanium oxide (TO) were chosen as sol-gel phase material, and LN/AO and LN/TO films were fabricated onto Inconel substrates. In each polling process, corona discharge after heat treatment in the furnace at 400 °C and at 200 °C was executed for LN/AO and LN/TO, respectively. Ultrasonic measurements up to 700 °C were performed and both transducers were able to confirm the reflected echoes and ultrasonic performance stability at 700 °C. Especially LN/TO showed the highest signal strength compared to previously developed high temperature lead-free sol-gel composite materials, Bi4Ti3O12 (BiT)/BiT and CaBi2Ta2O9 (CBTa)/BiT.
- リンク情報
- ID情報
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- DOI : 10.35848/1347-4065/ac5720
- ISSN : 0021-4922
- eISSN : 1347-4065
- ORCIDのPut Code : 108596154
- SCOPUS ID : 85131691146