Effect of the area of a lithium niobate transducer on the efficiency of ultrasonic atomization driven by resonance vibration

Keisuke Yoshioka, Yuta Kurashina, Ami Ogawa, Takumi Asakura

研究成果: Article査読

1 被引用数 (Scopus)

抄録

In recent years, individual control of one's personal environment has been drawing increasing attention due to the growing interest in health care. Wearable devices are especially useful because of their controllability regardless of location. Humidity is one of the inevitable factors in the personal environment as a preventive against infectious diseases. Although atomization devices are commonly used as a method of humidity control, at present, there are no wearable humidity control devices. Vibration of a lithium niobate (LN) device in the thickness mode is a promising piezoelectric method for miniaturization of atomization devices for humidity control. To miniaturize the atomization device, the transducer size needs to be small not so much as to decrease the atomization efficiency. However, the effect of the device area on the atomization efficiency of LN at a size suitable for mounting in wearable devices has not been studied. Here, we conducted an atomization demonstration of LN devices with different sizes to evaluate particle size and atomization efficiency. Furthermore, to reveal the relationship between vibration behavior and atomization efficiency, resonance vibration in the MHz frequency band was evaluated by the finite element method and an impedance analyzer. The results showed that the peak size of water particles atomized by each device was in the range of 3.2 to 4.2 µm, which is smaller than particles produced by typical piezoelectric ceramics. Moreover, the best LN size for efficient atomization was found to be 8 mm × 10 mm among the five LN device sizes used in experiments. From the relationship between vibration behavior and atomization efficiency, the size of the transducer was suggested to affect the vibration mode. The obtained result suggested that the LN device is suitable for small wearable nebulizer devices.

本文言語English
論文番号106019
ジャーナルUltrasonics Sonochemistry
86
DOI
出版ステータスPublished - 2022 5月

ASJC Scopus subject areas

  • 環境化学
  • 化学工学(その他)
  • 放射線学、核医学およびイメージング
  • 音響学および超音波学
  • 有機化学
  • 無機化学

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