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- Title
高性能(K0.5 Na0.5)NbO3陶瓷无铅医用超声换能器.
- Authors
陈兴飞; 黄尧; 李晓兵”; 孙丰龙; 杨钊萍; 李尧; 罗来慧; 周长江
- Abstract
: The (Ko. Naas) NbO, ceramics, as an important high-performance lead-free piezoelectric material system, are expected to promote the lead-free development of medical ultrasound imaging transducers. The study on the effective doping modification of KNN ceramics was carried out. The KNN-based piezoelectric ceramics with excellent piezoelectric properties were prepared by solid phase sintering method. The piezoelectric constant and the electromechanical coupling coefficient were up to 400 pC/N and 55%, respectively. Based on its high piezoelectricity and low acoustic impedance. a high-resolution and large-bandwidth medical ultrasound transducer with high-resolution and large-bandwidth was prepared. The transducer has an axial resolution of 47 µm, a bandwidth of 93% @ -6 dB and a center frequency of 18.0 MHz. Using the prepared transducer to perform B-mode ultrasound imaging on a human tissue model, the high-resolution structure images of tubular tissue have been obtained. The results. indicate that the KNN system ceramics are a kind of material with excellent comprehensive performance for medical high-frequency ultrasound imaging.
- Subjects
ULTRASONIC imaging; ULTRASONIC transducers; PIEZOELECTRIC materials; CERAMICS
- Publication
Piezoelectrics & Acoustooptics, 2023, Vol 45, Issue 6, p910
- ISSN
1004-2474
- Publication type
Article
- DOI
10.11977/ji.ssn.1004-2474.2023.06.021