A 20 MHz single-element ultrasonic probe using 0.91Pb(Zn/sub 1/3/Nb/sub 2/3/)O/sub 3/-0.09PbTiO/sub 3/ single crystal
| Autor: | Kouichi Harada, Yohachi Yamashita, Shiroh Saitoh, Tsuyoshi Kobayashi, S. Shimanuki |
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| Rok vydání: | 1998 |
| Předmět: |
Fabrication
Materials science Acoustics and Ultrasonics business.industry Niobium chemistry.chemical_element Piezoelectricity Transducer chemistry visual_art Electronic engineering visual_art.visual_art_medium Optoelectronics Ultrasonic sensor Ceramic Electrical and Electronic Engineering business Instrumentation Single crystal Solid solution |
| Zdroj: | IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 45:1071-1076 |
| ISSN: | 0885-3010 |
| DOI: | 10.1109/58.710590 |
| Popis: | A 20 MHz single-element ultrasonic probe using 0.91Pb(Zn1/3Nb2/3)O3-0.09PbTiO3 (PZN-PT 91/9) single crystal has been fabricated. The single crystal of PZN-PT 91/9 orientated to the (001) plane has longitudinal coupling factor of k33 > 90%, which is much larger than the k33 = 70 to 80% of conventional Pb(Zr1-x,Tix)O3 (PZT) based ceramics. A single crystal of PZN-PT 91/9 without inclusion or crack has been grown with dimensions of about 25 x 15 x 5 mm by the self-flux method. Because mechanical strength in the fabrication of disk transducers orientated to the (001) plane was sufficiently strong, under the same conditions as are applied to conventional PZT ceramics, a piston single-element probe with a diameter of 2.0 mm and a frequency of 20 MHz was successfully fabricated. The bandwidth of the PZN-PT 91/9 probe was 13-26 MHz, which was 4 MHz broader than that of the conventional PZT probe. |
| Databáze: | OpenAIRE |
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