Electret - Wikipedia
An electret (formed as a portmanteau of electr- from "electricity" and -et from "magnet") is a dielectric material that has a quasi-permanent electrical polarisation. An electret has internal and external electric fields, and is the electrostatic equivalent of a permanent magnet.
驻极体 - 维基百科，自由的百科全书
駐極体 （又稱 永電體，英語： Electret，日语： エレクトレット 或 電石）是一种自身帶有電荷的介電材料，且電荷近乎於永久存在於。 驻极体可以只带有单一 电荷，也可以带有等量的异号电荷。 驻极体带有单一电荷的时候，例如正电荷，则其电场方向由自身指向无穷远或者等效的无穷远处；带有等量异号电荷的驻极体通过内部的电荷对的相同指向，可以形成等效的两端分别带正负电荷的物体，此种情形下驻极体与 磁铁 非常相似。 早期的制作驻极体的方法是在强电场中融化 …
Electret - an overview | ScienceDirect Topics
Electrets are the class of dielectric material containing quasi-permanent electric charge or molecular dipoles, which can generate internal and external electric fields. They are the electrostatic equivalent of a permanent magnet that can store charges for prolonged time, as long as 100 years, in lots of the cases.
Electret | Permanent Charge, Dielectric Materials & Polarization ...
electret, material that retains its electric polarization after being subjected to a strong electric field. The positive charge within the material becomes permanently displaced in the direction of the field, and the negative charge becomes permanently displaced …
Electret - an overview | ScienceDirect Topics
Electrets use a surface with a permanent electrostatic charge to collect particles. Electret materials are plastics that have been heated and stretched in a dc electric field, giving them a permanent surface charge. Electrets can be used in brushes or …
Electrets | Whitesides Research Group - Harvard University
Electrets are materials that have a quasi-permanent electric field at their surfaces due to either an imbalance of charge at the surface (space charge electrets) or to aligned dipoles through the bulk of the material (dipolar electrets). Space charge electrets are …
Electrets and Their Theoretical Modeling | SpringerLink
2024年10月15日 · Electrets are materials that stably maintain a static charge and provide an electric field over a long period. The electric field generated by these materials can be used to generate power through vibration, which could be employed as a standalone power source for...
Electrets - SpringerLink
Book Title: Electrets. Editors: Gerhard M. Sessler. Series Title: Topics in Applied Physics. DOI: https://doi.org/10.1007/3-540-17335-8. Publisher: Springer Berlin, Heidelberg. eBook Packages: Springer Book Archive. Copyright Information: Springer-Verlag Berlin Heidelberg 1987. Softcover ISBN: 978-3-540-17335-9 Published: 27 February 1987
Journal of Applied Polymer Science | Wiley Online Library
2020年12月24日 · A polymer electret cell could serve as low energy-consuming device with a low cost. Glimpses of polymer electrets' applications in energy harvesting, transducers, transistors and air-filters suggest products established on polymer electrets have been used practically in almost all areas of the world we live in.
Electret-同济大学驻极体与功能电介质课题组
Electret (formed of elektr- from "electricity" and -et from "magnet") is a dielectric material that has a quasi-permanent electric charge or dipole polarization. An electret generates internal...