Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Frank T. Djuth"'
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 60:2615-2625
Several micromachining techniques for the fabrication of high-frequency piezoelectric composite ultrasonic array transducers are described in this paper. A variety of different techniques are used in patterning the active piezoelectric material, atta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4059547eb2c69f2f822c8b4f0c5569c4
https://doi.org/10.1109/tuffc.2013.2860
https://doi.org/10.1109/tuffc.2013.2860
Publikováno v:
Ultrasonics. 52:497-502
This paper reports the design, fabrication, and performance of miniature micromachined high frequency PMN-PT/epoxy 1-3 composite ultrasonic annular arrays. The PMN-PT single crystal 1-3 composites were made with micromachining techniques. The area of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d22bfd99c0525e7e21d7b240810b001f
https://doi.org/10.1016/j.ultras.2011.11.001
https://doi.org/10.1016/j.ultras.2011.11.001
Autor:
Ping Sun, Gaofeng Wang, Dawei Wu, Benpeng Zhu, Changhong Hu, Changgeng Liu, Frank T. Djuth, Qifa Zhou, K. Kirk Shung
Publikováno v:
Ferroelectrics. 408:120-128
Development of PMN-PT single crystal/epoxy 1-3 composites for high-frequency ultrasonic transducers application is presented. The composite was fabricated by using a DRIE dry etching process with a 45% volume fraction of PMN-PT. A 35 MHz ultrasound f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a53e7835bbf4b275e9893d9ab76e00b9
https://doi.org/10.1080/00150193.2010.485546
https://doi.org/10.1080/00150193.2010.485546
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 57:2213-2220
This paper presents the development of a micro-machined high-frequency linear array using PZT piezoelectric thick films. The linear array has 32 elements with an element width of 24 μm and an element length of 4 mm. Array elements were fabricated by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::313c432dec2c9561ba2fc898f56c140c
https://doi.org/10.1109/tuffc.2010.1680
https://doi.org/10.1109/tuffc.2010.1680
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 56:2304-2310
This paper presents the design, fabrication, and measurements of very high frequency kerfless linear arrays prepared from PZT film and PZT bulk material. A 12-microm PZT thick film fabricated from PZT-5H powder/solution composite and a piece of 15-mi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4262042d6f91ecf4aef4dbf5824ad7b
https://doi.org/10.1109/tuffc.2009.1311
https://doi.org/10.1109/tuffc.2009.1311
This paper describes the development and characterization of a high-frequency (65-MHz) ultrasound transducer linear array. The array was built from bulk PZT which was etched using an optimized chlorine-based plasma dry-etching process. The median etc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3633be56a94d9be0cd555dd21f6beda7
https://europepmc.org/articles/PMC3982855/
https://europepmc.org/articles/PMC3982855/
Autor:
Qifa Zhou, Ruimin Chen, Frank T. Djuth, Changhong Hu, K. Kirk Shung, Xiang Li, Xiabing Zhang, Changgeng Liu
Publikováno v:
2010 IEEE International Ultrasonics Symposium.
Micromachined high-frequency PMN-PT 1–3 composite ultrasonic annular arrays have been developed. The design, fabrication, and performance of the miniature transducers are described in this paper. PMN-PT single crystal 1–3 composite was produced u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce48ff4b752c76e041cf97b38d5eb684
https://doi.org/10.1109/ultsym.2010.5936008
https://doi.org/10.1109/ultsym.2010.5936008
During the first year of this grant, an extensive retrospective database was constructed with emphasis on early hemodynamic studies of patients with severe trauma. The goal is to produce a comprehensive, objective, unbiased database that can be indep
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2351c3427b14bcff3b6dc05a37f0014d
https://doi.org/10.21236/ada421459
https://doi.org/10.21236/ada421459
Autor:
Srinivas Tadigadapa, Frank T. Djuth, Thomas N. Jackson, S.J. Gross, Susan Trolier-McKinstry, Q. Zhang
Publikováno v:
SPIE Proceedings.
The high piezoelectric effect of lead zirconate titanate (PZT) films enables improved performance in microelectromechanical systems (MEMS). The material's reliable integration into current and mainstream MEMS microfabrication processes is then of gre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c5164dc8c94a645cc843ba856fa5616
https://doi.org/10.1117/12.442988
https://doi.org/10.1117/12.442988
Autor:
Frank T. Djuth
Publikováno v:
Advances in Space Research. 9:123-131
During recent experiments at Arecibo, Puerto Rico, large (1000 - >2500 K) enhancements in electron temperature have been observed when high-power radio waves reflect near the nighttime F region peak. The electron temperature enhancements are accompan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::262fab955072976b8861456465a94e22
https://doi.org/10.1016/0273-1177(89)90350-5
https://doi.org/10.1016/0273-1177(89)90350-5