{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,3]],"date-time":"2026-02-03T20:49:55Z","timestamp":1770151795653,"version":"3.49.0"},"reference-count":17,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2018,9,19]],"date-time":"2018-09-19T00:00:00Z","timestamp":1537315200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"the National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["51332003,51202184"],"award-info":[{"award-number":["51332003,51202184"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"International Science &amp; Technology Cooperation Program of China","award":["2010DFB13640, 2011DFA51880"],"award-info":[{"award-number":["2010DFB13640, 2011DFA51880"]}]},{"name":"111 Project of China","award":["B14040"],"award-info":[{"award-number":["B14040"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A lead-free 0.94(Na0.5Bi0.5) TiO3-0.06 BaTiO3 (BNT-BT) thick film, with a thickness of 60 \u03bcm, has been fabricated using a tape-casting method. The longitudinal piezoelectric constant, clamped dielectric permittivity constant, remnant polarization and coercive field of the BNT-BT thick film were measured to be 150 pC\/N, 1928, 13.6 \u03bcC\/cm2, and 33.6 kV\/cm, respectively. The electromechanical coupling coefficient kt was calculated to be 0.55 according to the measured electrical impedance spectrum. A high-frequency plane ultrasound transducer was successfully fabricated using a BNT-BT thick film. The performance of the transducer was characterized and evaluated by the pulse-echo testing and wire phantom imaging operations. The BNT-BT thick film transducer exhibits a center frequency of 34 MHz, a \u22126 dB bandwidth of 26%, an axial resolution of 77 \u03bcm and a lateral resolution of 484 \u03bcm. The results suggest that lead-free BNT-BT thick film fabricated by tape-casting method is a promising lead-free candidate for high-frequency ultrasonic transducer applications.<\/jats:p>","DOI":"10.3390\/s18093166","type":"journal-article","created":{"date-parts":[[2018,9,19]],"date-time":"2018-09-19T10:50:31Z","timestamp":1537354231000},"page":"3166","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Fabrication and Characterization of High-Frequency Ultrasound Transducers Based on Lead-Free BNT-BT Tape-Casting Thick Film"],"prefix":"10.3390","volume":"18","author":[{"given":"Junshan","family":"Zhang","sequence":"first","affiliation":[{"name":"Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education &amp; International Center for Dielectric Research, School of Electronic and Information Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, Shaanxi, China"},{"name":"School of Equipment Engineering, Engineering University of People\u2019s Armed Police, Xi\u2019an 710086, Shaanxi, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wei","family":"Ren","sequence":"additional","affiliation":[{"name":"Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education &amp; International Center for Dielectric Research, School of Electronic and Information Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, Shaanxi, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yantao","family":"Liu","sequence":"additional","affiliation":[{"name":"Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education &amp; International Center for Dielectric Research, School of Electronic and Information Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, Shaanxi, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaoqing","family":"Wu","sequence":"additional","affiliation":[{"name":"Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education &amp; International Center for Dielectric Research, School of Electronic and Information Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, Shaanxi, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chunlong","family":"Fei","sequence":"additional","affiliation":[{"name":"School of Microelectronics, Xidian University, Xi\u2019an 740071, Shaanxi, China"},{"name":"Department of Ophthalmology and Biomedical Engineering, National Institutes of Health (NIH) Transducer Resource Center, University of Southern California, Los Angeles, CA 90089, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yi","family":"Quan","sequence":"additional","affiliation":[{"name":"Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education &amp; International Center for Dielectric Research, School of Electronic and Information Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, Shaanxi, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qifa","family":"Zhou","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology and Biomedical Engineering, National Institutes of Health (NIH) Transducer Resource Center, University of Southern California, Los Angeles, CA 90089, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2018,9,19]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2281","DOI":"10.1109\/TUFFC.2011.2085","article-title":"80-MHz intravascular ultrasound transducer using PMN-PT free-standing film","volume":"58","author":"Li","year":"2011","journal-title":"IEEE Trans. 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