1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)最新文献_第6页

The influence of atmospheric pressure on the space charge of multilayered epoxy: a study using the thermal step method and the thermally stimulated discharge currents technique 大气压对多层环氧树脂空间电荷的影响:采用热步进法和热刺激放电电流技术的研究

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.804601

S. Malrieu, J. Castellon

引用次数: 0

Morphology and the electro-mechanical breakdown model in polyethylene 聚乙烯的形貌及电-机械击穿模型

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.807893

G. Greenway, A. Vaughan, S. Moody

引用次数: 12

Measurements of electric current through a liquid-air interface in corona discharge 电晕放电中液气界面电流的测量

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.807930

F. Vega, A.T. Perez

引用次数: 1

Space-charge and conduction-current measurements for the evaluation of aging of insulating materials for DC applications 评价直流绝缘材料老化的空间电荷和传导电流测量

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.804587

G. Montanari, D. Fabiani, L. Bencivenni, B. Garros, C. Audry

{"title":"Space-charge and conduction-current measurements for the evaluation of aging of insulating materials for DC applications","authors":"G. Montanari, D. Fabiani, L. Bencivenni, B. Garros, C. Audry","doi":"10.1109/CEIDP.1999.804587","DOIUrl":"https://doi.org/10.1109/CEIDP.1999.804587","url":null,"abstract":"This paper focuses on the measurement of charging current and space charges as the tool to obtain early indications of aging occurring in XLPE specimens under DC electrical stress. A sample of flat specimens was subjected to DC electrical field of 45 kV/mm under vacuum, at room temperature. For 1700 hours. At different aging times, some specimens were removed from the aging cell and measurements of the above-mentioned properties performed, with the main aim to investigate for electrical threshold evolution with time. The threshold was inferred by space charge observations and conduction current measurements, performed at different values of electrical field and room temperature. Moreover, microstructural investigation was carried out by small-angle X-ray scattering, SAXS, technique. It is shown that the electrical threshold is a sensitive indicator of aging, decreasing as stress time increases and displaying variations after times several order of magnitude lower than the expected insulation life. Likewise, SAXS measurements provide indication of sub-microcavity length variation with aging time.","PeriodicalId":267509,"journal":{"name":"1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121248287","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: 16

Recovery voltage measurements on XLPE cables XLPE电缆的恢复电压测量

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.807869

P. Morshuis, H. J. V. Breen, J. Smit, G. Urbani

引用次数: 5

Third harmonic generation of soluble vanadyl-phthalocyanine doped in polymer film 可溶酞菁钒掺杂聚合物薄膜的三次谐波生成

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.804591

H. Nakano, A. Maeda, H. Furuhashi, T. Yoshikawa, Y. Uchida, K. Kojima, A. Ohashi, S. Ochiai, M. Ieda, T. Mizutani

{"title":"Third harmonic generation of soluble vanadyl-phthalocyanine doped in polymer film","authors":"H. Nakano, A. Maeda, H. Furuhashi, T. Yoshikawa, Y. Uchida, K. Kojima, A. Ohashi, S. Ochiai, M. Ieda, T. Mizutani","doi":"10.1109/CEIDP.1999.804591","DOIUrl":"https://doi.org/10.1109/CEIDP.1999.804591","url":null,"abstract":"The third-order optical susceptibilities of PMMA thin films doped with soluble vanadyl-phthalocyanine derivatives ((t-Bu)/sub n/VOPc) were studied by Maker fringe method. We intended to control the molecular packing of VOPc in PMMA in order to improve third-order optical susceptibility (/spl chi//sup (3)/). For this purpose we selected soluble /sub n/VOPc derivatives and obtained a packing structure similar to the phase II of VOPc thin film. Packing control of the phthalocyanine molecules was carried out by exposing PMMA films to organic solvent vapour. PMMA thin films doped with (t-Bu)/sub 4/VOPc, (t-Bu)/sub 1.45/VOPc and (t-Bu)/sub 1.44/VOPc were treated with dichloroethane vapour in a desiccator at room temperature. The intensity of THG are in the order of (t-Bu)/sub 1.45/VOfc/PMMA>(t-Bu)/sub 1.44/VOPc/PMMA>VOPc(t-Bu)/sub 4/VOPc/PMMA. This means that the hyperpolarisability of (t-Bu)/sub n/VOPc molecule depends upon a number of tert-butyl radicals. The third-order optical susceptibility (/spl chi//sup (3)/) was estimated for (t-Bu)/sub 1.45/VOPc/PMMA. Its value was about 7/spl times/10/sup -12/ esu. This technique is useful to make optical waveguide.","PeriodicalId":267509,"journal":{"name":"1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)","volume":"672 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116103888","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: 1

PD measurements in N/sub 2/-SF/sub 6/ gas mixtures 在N/sub 2/-SF/sub 6/气体混合物中进行PD测量

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.804662

G. Schoffner, W. Boeck, F. Messerer, L. Michalik

引用次数: 3

Electroluminescence in additive-contained low density polyethylene 含添加剂低密度聚乙烯的电致发光

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.807874

T. Itou, T. Nakiri, F. Zong-Huai, T. Takahashi, J. Suzuki, H. Miyata

引用次数: 0

Corona-discharge-induced hydrophobicity loss and recovery of silicones 电晕放电引起的有机硅疏水性损失和恢复

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.807902

J. Kim, M. Chaudhury

{"title":"Corona-discharge-induced hydrophobicity loss and recovery of silicones","authors":"J. Kim, M. Chaudhury","doi":"10.1109/CEIDP.1999.807902","DOIUrl":"https://doi.org/10.1109/CEIDP.1999.807902","url":null,"abstract":"The effect of corona discharge on the hydrophobicity of polydimethylsiloxane (PDMS) used as high-voltage (HV) insulation and the subsequent recovery of hydrophobicity when exposure ceases is now a well-known phenomenon. Surface characterization studies have established that corona exposure in the laboratory forms a brittle, wettable, very thin silica-like layer on the surface of most PDMS elastomers, consistent with similar effects from radio-frequency plasma treatments. However, there is still considerable debate regarding the relative importance of the two major hydrophobic recovery mechanisms postulated, diffusion of low molecular weight (LMW) material and reorientation or overturn of treated chains in the surface region. This study used extracted PDMS and also PDMS with deliberately added LMW PDMS fluid. Contact angle and X-ray photoelectron spectroscopy (XPS) were used to assess the effect of corona discharge voltage variation and aging at different temperatures. In all cases the familiar highly cross-linked silica-like layer is formed. Such a structure cannot readily reorient between hydrophilic and hydrophobic states implying that diffusion of LMW components is the key mechanism of hydrophobic recovery. These latest studies of PDMS systems, solvent extracted to be free of diffusible species, also shows hydrophobic recovery suggesting that LMW PDMS might be produced in-situ by depolymerization.","PeriodicalId":267509,"journal":{"name":"1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115355062","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: 37

Study of space charge dynamics directly on power cables using the thermal step method 用热步进法直接研究电力电缆上的空间电荷动力学

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI: 10.1109/CEIDP.1999.804590

S. Agnel, P. Notingher, A. Toureille, J. Castellon, S. Malrieu

引用次数: 7