Abstract
In this paper, lead-free Na0.5K0.5NbO3 (NKN) based piezoelectric ceramics are synthesized by the conventional mixed-oxide methods with sintering temperature at 900-1050 °C. Microstructural analyses of un-doped and CuO-doped ceramics have been carried out and compared using X-ray diffraction (XRD) and scanning electron microscope (SEM), The dependence of the sintering temperatures of the CuO-doped NKN ceramics on the piezoelectric and dielectric properties have been investigated. The results show that the CuO-doped NKN specimens sintered at 1020 °C present the high thickness coupling factor, kt (>0.50), mechanical quality factor Qm =1100 and the lower temperature coefficient of resonance frequency in thickness mode (dfr/fr <2%) within the temperature range 20-100 °C Then, we successfully construct 3-MHz transducers (LF transducer) utilizing our fabricated piezoceramics and examine their static resonant characteristics. Simultaneously, their dynamic acoustic power is measured by the acoustic force balance under a power circuit driving with the intermittent pulse control as compared to the commercial transducers. We find the effective coupling factor of LF transducer (0.05) is superior to that of commercial transducer (0.45).
| Original language | English |
|---|---|
| Title of host publication | Ceramics for Environmental and Energy Applications - A Collection of Papers Presented at the 8th Pacific Rim Conference on Ceramic and Glass Technology, PACRIM-8 |
| Pages | 105-116 |
| Number of pages | 12 |
| Publication status | Published - 2010 Aug 19 |
| Event | 8th Pacific Rim Conference on Ceramic and Glass Technology, PACRIM-8 - Vancouver, BC, Canada Duration: 2009 May 31 → 2009 Jun 5 |
Publication series
| Name | Ceramic Transactions |
|---|---|
| Volume | 217 |
| ISSN (Print) | 1042-1122 |
Other
| Other | 8th Pacific Rim Conference on Ceramic and Glass Technology, PACRIM-8 |
|---|---|
| Country | Canada |
| City | Vancouver, BC |
| Period | 09-05-31 → 09-06-05 |
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All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry
Cite this
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The dynamic characteristics of ultrasonic therapeutic transducers using lead-free na0.5k0.5nbo3 based ceramics. / Yang, Ming Ru; Chu, Sheng Yuan; Tsai, Cheng Che; Hong, Cheng Shong; Lin, Chih Lung.
Ceramics for Environmental and Energy Applications - A Collection of Papers Presented at the 8th Pacific Rim Conference on Ceramic and Glass Technology, PACRIM-8. 2010. p. 105-116 (Ceramic Transactions; Vol. 217).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - The dynamic characteristics of ultrasonic therapeutic transducers using lead-free na0.5k0.5nbo3 based ceramics
AU - Yang, Ming Ru
AU - Chu, Sheng Yuan
AU - Tsai, Cheng Che
AU - Hong, Cheng Shong
AU - Lin, Chih Lung
PY - 2010/8/19
Y1 - 2010/8/19
N2 - In this paper, lead-free Na0.5K0.5NbO3 (NKN) based piezoelectric ceramics are synthesized by the conventional mixed-oxide methods with sintering temperature at 900-1050 °C. Microstructural analyses of un-doped and CuO-doped ceramics have been carried out and compared using X-ray diffraction (XRD) and scanning electron microscope (SEM), The dependence of the sintering temperatures of the CuO-doped NKN ceramics on the piezoelectric and dielectric properties have been investigated. The results show that the CuO-doped NKN specimens sintered at 1020 °C present the high thickness coupling factor, kt (>0.50), mechanical quality factor Qm =1100 and the lower temperature coefficient of resonance frequency in thickness mode (dfr/fr <2%) within the temperature range 20-100 °C Then, we successfully construct 3-MHz transducers (LF transducer) utilizing our fabricated piezoceramics and examine their static resonant characteristics. Simultaneously, their dynamic acoustic power is measured by the acoustic force balance under a power circuit driving with the intermittent pulse control as compared to the commercial transducers. We find the effective coupling factor of LF transducer (0.05) is superior to that of commercial transducer (0.45).
AB - In this paper, lead-free Na0.5K0.5NbO3 (NKN) based piezoelectric ceramics are synthesized by the conventional mixed-oxide methods with sintering temperature at 900-1050 °C. Microstructural analyses of un-doped and CuO-doped ceramics have been carried out and compared using X-ray diffraction (XRD) and scanning electron microscope (SEM), The dependence of the sintering temperatures of the CuO-doped NKN ceramics on the piezoelectric and dielectric properties have been investigated. The results show that the CuO-doped NKN specimens sintered at 1020 °C present the high thickness coupling factor, kt (>0.50), mechanical quality factor Qm =1100 and the lower temperature coefficient of resonance frequency in thickness mode (dfr/fr <2%) within the temperature range 20-100 °C Then, we successfully construct 3-MHz transducers (LF transducer) utilizing our fabricated piezoceramics and examine their static resonant characteristics. Simultaneously, their dynamic acoustic power is measured by the acoustic force balance under a power circuit driving with the intermittent pulse control as compared to the commercial transducers. We find the effective coupling factor of LF transducer (0.05) is superior to that of commercial transducer (0.45).
UR - http://www.scopus.com/inward/record.url?scp=77955573555&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77955573555&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:77955573555
SN - 9780470905470
T3 - Ceramic Transactions
SP - 105
EP - 116
BT - Ceramics for Environmental and Energy Applications - A Collection of Papers Presented at the 8th Pacific Rim Conference on Ceramic and Glass Technology, PACRIM-8
ER -