文献类型：期刊文献

英文题名：More efficient charging of ferroelectrets via tuning of the Paschen breakdown

作者：Qiu, Xunlin[1];Liu, Yuji[1];Wu, Chengyuan[1];Xiang, Yanxun[1];Xuan, Fu-Zhen[1];Gerhard, Reimund[2]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai Key Lab Intelligent Sensing & Detect Tech, Shanghai, Peoples R China;[2]Univ Potsdam, Inst Phys & Astron, Potsdam, Germany

年份：2023

卷号：122

期号：9

外文期刊名：APPLIED PHYSICS LETTERS

收录：;EI(收录号：20231113698907);WOS:【SCI-EXPANDED(收录号:WOS:000943241100003)】；

基金：Financial support from the National Key Research and Development Program of China (No. 2021YFC3001802), the National Natural Science Foundation of China (Nos. 12174102 and 12025403), and the Shanghai Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning is gratefully acknowledged.

语种：英文

外文关键词：Dielectric materials

摘要：Charging by means of dielectric barrier discharges (DBDs) is a critical step in the preparation of ferroelectrets (also called piezoelectrets). Triggering of the DBD charging in ferroelectrets is governed by Paschen's law. The Paschen-breakdown voltage V-b of common gases exhibits a U-shaped dependence on the product of gas pressure p and electrode spacing d (internal-cavity height in the present ferroelectret context). This allows for a more efficient charging strategy for ferroelectrets whose pd value at atmospheric pressure is different from the ( pd )(min) value of the Paschen-breakdown curve. For easier triggering of the DBD charging, the pd is adjusted toward ( pd ) (min) (corresponding to V- b,V-min of the Paschen curve) by controlling the gas pressure in the cavity. Subsequently, pd is restored to its value at ambient pressure under the charging voltage in order to obtain a high remanent polarization. The proposed charging scheme is easy to operate and can significantly improve the charging efficiency of ferroelectrets with a wide range of cavity geometries.Published under an exclusive license by AIP Publishing.