Fabrication and characteristics of electret using fine silica powder and its application of ultrasonic sensor

IF 0.5 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Electronics and Communications in Japan Pub Date : 2022-08-13 DOI:10.1002/ecj.12372

Kensuke Kageyama, Kakeru Kobayashi, Yoshiaki Kawada, Takenobu Sakai

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引用次数: 0

Abstract

Electrets were prepared by spin-coating the dispersion of fine silica powders, and their charge retention characteristics were investigated. Finer silica aggregates were formed on the PTFE surface layer by spin-coating the dispersed solution of fine silica powder than those formed by spray-coating colloidal silica. Electrets using fine silica powder also showed better charge retention characteristics than those using colloidal silica. Such an improvement in the charge retention might be due to the suppression of discharge in the excessive gap caused by coarse silica aggregates. Then, ECSs were fabricated using the prepared electrets, and their transmitting and receiving characteristics of airborne ultrasound were also investigated. The peak sensitivity of the ECS using a spin coating of fine powdered silica dispersion was slightly improved from those using spray coating of colloidal silica. On the other hand, the peak frequency and frequency band were greatly improved using spin coating of fine powdered silica dispersion. Therefore, ECS using fine silica powder is expected to be applied as a broadband airborne ultrasonic sensor.

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细硅粉驻极体的制备、特性及其在超声传感器中的应用

采用自旋包覆分散二氧化硅粉末制备驻极体，研究了其电荷保持特性。在聚四氟乙烯的表层上，用硅粉分散溶液自旋涂覆形成的硅聚集体比用喷雾涂覆形成的硅溶胶聚集体要细。使用细硅粉的驻极体也比使用胶体硅的驻极体表现出更好的电荷保留特性。这种电荷保留的改善可能是由于抑制了由粗硅骨料引起的过大间隙中的放电。然后，利用所制备的驻极体制备了ECSs，并对其机载超声的发射和接收特性进行了研究。使用细粉二氧化硅分散体的自旋涂层比使用胶体二氧化硅喷涂涂层的ECS的峰值灵敏度略有提高。另一方面，细粉硅分散体的自旋镀膜大大提高了峰值频率和频带。因此，采用细硅粉的ECS有望应用于宽带机载超声传感器。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Electronics and Communications in Japan 工程技术-工程：电子与电气

CiteScore

0.60

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Electronics and Communications in Japan (ECJ) publishes papers translated from the Transactions of the Institute of Electrical Engineers of Japan 12 times per year as an official journal of the Institute of Electrical Engineers of Japan (IEEJ). ECJ aims to provide world-class researches in highly diverse and sophisticated areas of Electrical and Electronic Engineering as well as in related disciplines with emphasis on electronic circuits, controls and communications. ECJ focuses on the following fields: - Electronic theory and circuits, - Control theory, - Communications, - Cryptography, - Biomedical fields, - Surveillance, - Robotics, - Sensors and actuators, - Micromachines, - Image analysis and signal analysis, - New materials. For works related to the science, technology, and applications of electric power, please refer to the sister journal Electrical Engineering in Japan (EEJ).