Proceedings. 11th International Symposium on Electrets最新文献_第4页

Studies of space charge in electrically aged low density polyethylene 电老化低密度聚乙烯的空间电荷研究

Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1042935

M. Lança, E. Neagu, J. Marat-Mendes

引用次数: 3

Gas diffusion expansion-increased thickness and enhanced electromechanical response of cellular polymer electret films 气体扩散膨胀-多孔聚合物驻极体膜厚度增加和机电响应增强

Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1042976

M. Paajanen, H. Minkkinen, J. Raukola

引用次数: 53

Thermal stability of polarization structures in corona-charged P(VDF-HFP) copolymer films 电晕带电P(VDF-HFP)共聚物薄膜极化结构的热稳定性

Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1042962

Y. Gorokhovatsky, V.G. Boitzov, D. Rychkov

引用次数: 1

Poly(vinylidene fluoroethylene-trifluoroethylene) based high performance electroactive polymers 聚(偏二氟乙烯-三氟乙烯)基高性能电活性聚合物

Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1042975

Q.M. Zhang, F. Xia, Z.Y. Cheng, Haisheng Xu, Heng Li, M. Poh, Cheng Huang

引用次数: 10

The resolution of thermal profiling techniques 热剖面技术的分辨率

Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1042974

B. Ploss

引用次数: 5

Cellular electrets -from polymer granules to electromechanically active films 细胞驻极体——从聚合物颗粒到机电活性薄膜

Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1042977

J. Raukola, N. Kuusinen, Mika Paajanen

{"title":"Cellular electrets -from polymer granules to electromechanically active films","authors":"J. Raukola, N. Kuusinen, Mika Paajanen","doi":"10.1109/ISE.2002.1042977","DOIUrl":"https://doi.org/10.1109/ISE.2002.1042977","url":null,"abstract":"The paper describes how to study, develop and manufacture cellular electret films for ingenious applications. In order to create a cellular film, the polymer has to be equipped with fillers. These can be foam nucleating agents, where chemical reaction takes place or fillers, which produce cracks during film stretching. The third method to expand the film into a porous structure is to use the gas diffusion expansion method. The most critical things in determining the final porous structure are the material choice, additives and production method of the film. When porous film has been achieved the film has to be charged to get a permanent electric charge inside the film. The aim is to have electric charge on every single surface level of the porous film. Charging circumstances (charging pressure, charging in different gases, corona level) affect the electret. The electrical properties of the polymer itself is the most impressive element to define the final electret level. The principle of measuring the permanent electric charge at different temperature and the sensitivity levels of the porous film are also described in this study.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127126687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 24

Patterned piezoelectricity in charged, cellular polymers for air-borne ultrasound devices 用于机载超声装置的带电细胞聚合物的图案压电性

Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1042943

H. Hoislbauer, R. Schwodiauer, S. Bauer-Gogonea, S. Bauer

引用次数: 5

Dynamic space charge behaviour in polymeric DC cables 聚合物直流电缆的动态空间电荷行为

Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1042936

Rasmussen, Claus Nygaard, Mogens Henriksen

引用次数: 4

Charge trapping and stability in dielectrics deduced from isothermal and non-isothermal measurements 从等温和非等温测量推导出介电体中的电荷俘获和稳定性

Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1042956

J. Marat-Mendes, E. Neagu

{"title":"Charge trapping and stability in dielectrics deduced from isothermal and non-isothermal measurements","authors":"J. Marat-Mendes, E. Neagu","doi":"10.1109/ISE.2002.1042956","DOIUrl":"https://doi.org/10.1109/ISE.2002.1042956","url":null,"abstract":"The mechanisms of charge transport and trapping, in highly insulating polymers, can not be investigated properly by a unique (isothermal or nonisothermal) technique. Should the trapping time be high, the isothermal discharging time can be very long with the consequence that the discharging current becomes very low but there is still charge trapped in the sample. By sequential use of the isothermal charging, discharging, the final thermally stimulate discharge current and the final isothermal discharging current techniques, the charge dynamic in highly insulating materials can be investigated. A sequential protocol for the investigation of the trapping sites and trapped charge stability is proposed. The method is demonstrated for Teflon FEP-A. By using a selective charging, thermally stimulated discharge current peaks are obtained whose position shifts with formation conditions and are characterized by activation energies around 1.3-1.4 eV. The relaxation time of the trapped charge, at 523 K, increases as the amount of charge stored in the material decreases, providing evidence of a field-assisted detrapping process. The method is particularly useful for the temperature range where the thermal movement is important and/or the contributions from dipoles and space charge are equally important.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122388795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The anomalous change of dielectric parameters in glassy films under illumination 光照下玻璃膜介电参数的异常变化

Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1042965

G. Bordovsky, V.A. Bordovsky, R. Castro

引用次数: 0