1. 3D printed Er3+ doped KNNLN piezoelectric ceramics for transparent ultrasonic transducer application.
- Author
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Chen, Yan, Zhang, Donglai, Luo, Haofeng, Peng, Zhong, Zeng, Lvming, Yuan, Maodan, and Ji, Xuanrong
- Subjects
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TRANSPARENT ceramics , *ULTRASONIC transducers , *PIEZOELECTRIC ceramics , *STEREOLITHOGRAPHY , *LEAD-free ceramics , *ELECTRIC properties , *SPECIFIC gravity , *ACOUSTIC imaging , *MOLECULAR spectra - Abstract
The transparent [Li 0.04 (K 0.5 Na 0.5) 0.96 ]NbO 3 +0.5mol% Er 2 O 3 (KNNLN-Er) lead-free piezoelectric ceramics were prepared by stereolithography technique. The influence of different sintering holding time (4h∼8h) on the micromorphology, relative density, shrinkage, electric properties, and photoluminescence properties were systematically investigated. The KNNLN-Er ceramics show the coexistence of orthorhombic and tetragonal structures. The grain size increases obviously and then decreases slightly with the holding time increasing. The KNNLN-Er ceramics exhibit good piezoelectric performance (piezoelectric constant d 33 ∼97 pC/N, electromechanical couple coefficient k t ∼0.36) and the moderate transparency of 34% when the holding time is 6h during sintering at 1120°C. Besides, the intensity of the photoluminescence emission spectra increases with the holding time increasing. Furthermore, in order to estimate the properties of the KNNLN-Er transparent ceramics, an ultrasonic transducer with a center frequency of 10.5 MHz was fabricated, which can be used for photoacoustic and fluorescence imaging. The results indicate that the KNNLN-Er ceramics have potential for multimode imaging applications. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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