Pub Date : 2004-09-27DOI: 10.1109/DEIV.2004.1418634
I. A. Krinberg
A steady-state expansion of current-carrying plasma into vacuum has been studied theoretically. Such a situation arises in the vacuum arc discharge where the dense plasma streams from a cathode spot region with a super-sonic velocity. It has been shown that three characteristic modes of plasma expansion into the vacuum ambient may be distinguished in accordance with the conical, parabolical and cylindrical shape of plasma flaw. These modes correspond to the cases of expansion with electron cooling, isothermal expansion and expansion with electron heating. The parameters controlling formation of the different modes have been found.
{"title":"Three modes of plasma expansion in a vacuum arc","authors":"I. A. Krinberg","doi":"10.1109/DEIV.2004.1418634","DOIUrl":"https://doi.org/10.1109/DEIV.2004.1418634","url":null,"abstract":"A steady-state expansion of current-carrying plasma into vacuum has been studied theoretically. Such a situation arises in the vacuum arc discharge where the dense plasma streams from a cathode spot region with a super-sonic velocity. It has been shown that three characteristic modes of plasma expansion into the vacuum ambient may be distinguished in accordance with the conical, parabolical and cylindrical shape of plasma flaw. These modes correspond to the cases of expansion with electron cooling, isothermal expansion and expansion with electron heating. The parameters controlling formation of the different modes have been found.","PeriodicalId":137370,"journal":{"name":"XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130217951","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}
Pub Date : 2004-09-27DOI: 10.1109/DEIV.2004.1418602
N. V. Tatarinova
Up to now field emission was regarded as initiating factor of vacuum insulation violation. Present overview shows that at low values of external field strength (˜106 V/m) gas discharge in pores (defects) of electrode surface starts to play this role. Regularities of this discharge studied by the author explain vacuum insulation characteristics changing understanding of its present destruction mechanism. Experiments were performed at de voltage, hence prebreakdown currents could be measured. However, the results obtained are valid for other voltage modes, e.g. pulse and high frequency, as well.
{"title":"Influence of surface pores (defects) on vacuum insulation","authors":"N. V. Tatarinova","doi":"10.1109/DEIV.2004.1418602","DOIUrl":"https://doi.org/10.1109/DEIV.2004.1418602","url":null,"abstract":"Up to now field emission was regarded as initiating factor of vacuum insulation violation. Present overview shows that at low values of external field strength (˜106 V/m) gas discharge in pores (defects) of electrode surface starts to play this role. Regularities of this discharge studied by the author explain vacuum insulation characteristics changing understanding of its present destruction mechanism. Experiments were performed at de voltage, hence prebreakdown currents could be measured. However, the results obtained are valid for other voltage modes, e.g. pulse and high frequency, as well.","PeriodicalId":137370,"journal":{"name":"XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126429067","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}
Pub Date : 2004-09-27DOI: 10.1109/DEIV.2004.1418631
D. Alferov, V. Ivanov, L. Petrov, V. Sidorov, Y. Yashnov
The paper presents new results of experimental study of stability of the direct current electric arc in vacuum interrupter with an axially-symmetric magnetic field under contact opening. The study allowed to obtain more detailed data, on the dynamics of plasma glow and spots on electrodes during transition from stable to unstable stage of vacuum arc evolution. Features of stable and unstable stages of vacuum arc burning at direct current 50 - 150 A and at change of magnetic field from 100 up to 150 mT are investigated.
{"title":"DC vacuum are in the axially-symmetric magnetic field","authors":"D. Alferov, V. Ivanov, L. Petrov, V. Sidorov, Y. Yashnov","doi":"10.1109/DEIV.2004.1418631","DOIUrl":"https://doi.org/10.1109/DEIV.2004.1418631","url":null,"abstract":"The paper presents new results of experimental study of stability of the direct current electric arc in vacuum interrupter with an axially-symmetric magnetic field under contact opening. The study allowed to obtain more detailed data, on the dynamics of plasma glow and spots on electrodes during transition from stable to unstable stage of vacuum arc evolution. Features of stable and unstable stages of vacuum arc burning at direct current 50 - 150 A and at change of magnetic field from 100 up to 150 mT are investigated.","PeriodicalId":137370,"journal":{"name":"XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122276292","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}
Pub Date : 2004-09-27DOI: 10.1109/DEIV.2004.1418648
M. Abbaoui, A. Lefort, S. Clain
This paper describes a thermo physical phenomena analysis about a silver, copper, aluminium, iron, tungsten or graphite electrode submitted to a high density energy flux. The thermal flux necessary to create a cathode spot is about 1.1012Wm-2. For the studied metals and for values lower than 1.1012 Wm-2, the liquid phase does not appears and the entire energy coming at the cathode surface diffuses in the electrode. For values upper than 5.1012 Wm-2 a large part of the energy is used for the vaporization and the electrode vaporized length depends of the material nature. The gap situated between the two extreme values 1.1011 W m-2 and 1.1013 Wm-2 corresponds to the cathode spot with liquid and vapour phases.
{"title":"Influence of the material nature (Ag, Cu, Al, W, C) on the arc root characteristics at the cathode","authors":"M. Abbaoui, A. Lefort, S. Clain","doi":"10.1109/DEIV.2004.1418648","DOIUrl":"https://doi.org/10.1109/DEIV.2004.1418648","url":null,"abstract":"This paper describes a thermo physical phenomena analysis about a silver, copper, aluminium, iron, tungsten or graphite electrode submitted to a high density energy flux. The thermal flux necessary to create a cathode spot is about 1.10<sup>12</sup>Wm<sup>-2</sup>. For the studied metals and for values lower than 1.10<sup>12</sup> Wm<sup>-2</sup>, the liquid phase does not appears and the entire energy coming at the cathode surface diffuses in the electrode. For values upper than 5.10<sup>12</sup> Wm<sup>-2</sup> a large part of the energy is used for the vaporization and the electrode vaporized length depends of the material nature. The gap situated between the two extreme values 1.10<sup>11</> W m<sup>-2</sup> and 1.10<sup>13</sup> Wm<sup>-2</sup> corresponds to the cathode spot with liquid and vapour phases.","PeriodicalId":137370,"journal":{"name":"XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126985740","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}
Pub Date : 2004-09-27DOI: 10.1109/DEIV.2004.1418659
J. Fontchastagner, O. Chadebec, H. Schellekens, G. Meunier
We present a model of a rotating arc by coupling a finite element method and an arc model. A FEM software, commercialised under the name Flux3D, is used to calculate magnetic field between electrodes taking into account the real current distribution in the contacts and in the arc; moreover, induced currents and ferromagnetic effects can be taken into account. A phenomenological are model is used to predict the arc voltage, which depends on the local magnetic field and the arc length. This arc voltage is updated as the arc displaces itself across the contact surface. The information about arc voltage and local circuit equations are sufficient to find the velocity of the moving arc; hence this model seems more effective than models using Lorentz-forces to describe arc movement which need a priori knowledge about viscosity. The presented method seems to be a promising tool to describe the behaviour of rotating arcs in vacuum circuit breakers.
{"title":"Model of a rotating vacuum are by the coupling of a simple are model with a commercial 3D FEM","authors":"J. Fontchastagner, O. Chadebec, H. Schellekens, G. Meunier","doi":"10.1109/DEIV.2004.1418659","DOIUrl":"https://doi.org/10.1109/DEIV.2004.1418659","url":null,"abstract":"We present a model of a rotating arc by coupling a finite element method and an arc model. A FEM software, commercialised under the name Flux3D, is used to calculate magnetic field between electrodes taking into account the real current distribution in the contacts and in the arc; moreover, induced currents and ferromagnetic effects can be taken into account. A phenomenological are model is used to predict the arc voltage, which depends on the local magnetic field and the arc length. This arc voltage is updated as the arc displaces itself across the contact surface. The information about arc voltage and local circuit equations are sufficient to find the velocity of the moving arc; hence this model seems more effective than models using Lorentz-forces to describe arc movement which need a priori knowledge about viscosity. The presented method seems to be a promising tool to describe the behaviour of rotating arcs in vacuum circuit breakers.","PeriodicalId":137370,"journal":{"name":"XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131775393","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}
Pub Date : 2004-09-27DOI: 10.1109/DEIV.2004.1418647
A. Kozyrev, A. Shishkov
The report is devoted to theoretical research of process energy exchange of moving spherical macroparticles with scattering nonequilibrium plasma. The analysis of metal drops interaction with dense nonequilibrium plasma of a vacuum arc is carried out. Two cases are considered: 1) case of the rest plasma and 2) case of the fast expanding plasma. The theoretical estimation of a drop substance evaporation possibility during its flight through non-uniform cathode plasma jet is carried out. It is shown that under certain conditions significant and sometimes complete drops evaporation is possible. It is remarkable that the drops of more refractory substances can evaporate faster than drops of substances with low melting temperature (tungsten and gallium drops were investigated). The observable in experiments effect of a sudden appearance of luminous balls far from a cathode surface can be explained by sharp increasing of a drop temperature in the rest plasma.
{"title":"Movement, heating and evaporation of droplets in near-cathode region of vacuum arc","authors":"A. Kozyrev, A. Shishkov","doi":"10.1109/DEIV.2004.1418647","DOIUrl":"https://doi.org/10.1109/DEIV.2004.1418647","url":null,"abstract":"The report is devoted to theoretical research of process energy exchange of moving spherical macroparticles with scattering nonequilibrium plasma. The analysis of metal drops interaction with dense nonequilibrium plasma of a vacuum arc is carried out. Two cases are considered: 1) case of the rest plasma and 2) case of the fast expanding plasma. The theoretical estimation of a drop substance evaporation possibility during its flight through non-uniform cathode plasma jet is carried out. It is shown that under certain conditions significant and sometimes complete drops evaporation is possible. It is remarkable that the drops of more refractory substances can evaporate faster than drops of substances with low melting temperature (tungsten and gallium drops were investigated). The observable in experiments effect of a sudden appearance of luminous balls far from a cathode surface can be explained by sharp increasing of a drop temperature in the rest plasma.","PeriodicalId":137370,"journal":{"name":"XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117109610","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}
Pub Date : 2004-09-27DOI: 10.1109/DEIV.2004.1418608
D.J. Johnson, M. Savage, R. Sharpe, D. Proskurovsky, A. Batrakov
The paper describes an investigation of the HV breakdown mechanism between stainless steel and aluminum electrodes. The stainless steel electrodes have been treated with pulsed e-beam surface melting (EBEST), hydrogen vacuum furnace firing (HVFF), mechanical polish, and given a chromium oxide coating. The aluminum electrodes with various surface roughness and anodized coatings are also studied. Electrodes are cleaned in a littered clean air environment to minimize effects of air-born micro-particles. Breakdown tests were performed with a 160-ns- FWHM, l-cos(wt), voltage pulse of up to a 500 kV. The tests show that the breakdown voltage drops approximately as the square root of the gap for metal surfaces with gaps between 2 and 8 mm. The hold-off is about 1 MV/cm for 2.5 mm gaps for EBEST and mechanically polished stainless steel and 20% smaller for polished and machined aluminum. The standard model to explain this dependence of breakdown requires minute particles to cross the gap and initiate breakdown by forming plasma 011 impact to an electrode. For the short pulses used here the particles would need to be nanoparticles with only few hundred atoms. Optical diagnostics of breakdown arcs is presented to shed light on the perplexing physics limiting HV hold-off in these tests.
{"title":"Investigation of pulsed HV breakdown between treated stainless steel and aluminum electrodes with 2 to 8 mm gaps","authors":"D.J. Johnson, M. Savage, R. Sharpe, D. Proskurovsky, A. Batrakov","doi":"10.1109/DEIV.2004.1418608","DOIUrl":"https://doi.org/10.1109/DEIV.2004.1418608","url":null,"abstract":"The paper describes an investigation of the HV breakdown mechanism between stainless steel and aluminum electrodes. The stainless steel electrodes have been treated with pulsed e-beam surface melting (EBEST), hydrogen vacuum furnace firing (HVFF), mechanical polish, and given a chromium oxide coating. The aluminum electrodes with various surface roughness and anodized coatings are also studied. Electrodes are cleaned in a littered clean air environment to minimize effects of air-born micro-particles. Breakdown tests were performed with a 160-ns- FWHM, l-cos(wt), voltage pulse of up to a 500 kV. The tests show that the breakdown voltage drops approximately as the square root of the gap for metal surfaces with gaps between 2 and 8 mm. The hold-off is about 1 MV/cm for 2.5 mm gaps for EBEST and mechanically polished stainless steel and 20% smaller for polished and machined aluminum. The standard model to explain this dependence of breakdown requires minute particles to cross the gap and initiate breakdown by forming plasma 011 impact to an electrode. For the short pulses used here the particles would need to be nanoparticles with only few hundred atoms. Optical diagnostics of breakdown arcs is presented to shed light on the perplexing physics limiting HV hold-off in these tests.","PeriodicalId":137370,"journal":{"name":"XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123026962","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}
Pub Date : 2004-09-27DOI: 10.1109/DEIV.2004.1418597
O. L. Golubev, V. N. Shrednik
The methods of creation of the point sources of electrons and ions with localization of emission in a small angle based on field electron emission and field evaporation are considered. Examples of creation of such sources with use of emitters from pure metals, alloys and complex multicomponent compounds are given. Application of all described methods in a combination to a variety of materials of emitters enabler to create a great set of the point sources of the charged particles with various properties.
{"title":"The creation of the narrow electron and ion beams for a modification of a surface in nanometric scale","authors":"O. L. Golubev, V. N. Shrednik","doi":"10.1109/DEIV.2004.1418597","DOIUrl":"https://doi.org/10.1109/DEIV.2004.1418597","url":null,"abstract":"The methods of creation of the point sources of electrons and ions with localization of emission in a small angle based on field electron emission and field evaporation are considered. Examples of creation of such sources with use of emitters from pure metals, alloys and complex multicomponent compounds are given. Application of all described methods in a combination to a variety of materials of emitters enabler to create a great set of the point sources of the charged particles with various properties.","PeriodicalId":137370,"journal":{"name":"XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125212811","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}
Pub Date : 2004-09-27DOI: 10.1109/DEIV.2004.1418629
D. Pavelescu, V. Braic, F. Gherendi, M. Braic, C. Nitu, M. Balaceanu, G. Dumitrescu, C. Pavelescu, S. Niţu, P. Anghelita
The present paper deals with the problem of the TMF interruption systems breaking capability concerning vacuum circuit breakers. The main goal is a better understanding of the physical phenomena taking place during the interruption process, for high currents, corresponding to short-circuit regime in the electrical networks. The arc appearance and its behaviour were explored with a dedicafed optical sqstem. An example of spatial and temporal distribution of the arc light intensity is presented. Specific peculiarities of the optical spectra recorded in the proximi@ of the short circuit current zero (C.Z.) moments are reported. Different current interruption situations are correlated with plasma spectral diagnosis. On this basis the authors try to define a set of plasma parameters which are critical in the studied interruption processes.
{"title":"Investigation of the rotating arc plasma generated in transverse magnetic field (TMF) contacts of vacuum interrupter","authors":"D. Pavelescu, V. Braic, F. Gherendi, M. Braic, C. Nitu, M. Balaceanu, G. Dumitrescu, C. Pavelescu, S. Niţu, P. Anghelita","doi":"10.1109/DEIV.2004.1418629","DOIUrl":"https://doi.org/10.1109/DEIV.2004.1418629","url":null,"abstract":"The present paper deals with the problem of the TMF interruption systems breaking capability concerning vacuum circuit breakers. The main goal is a better understanding of the physical phenomena taking place during the interruption process, for high currents, corresponding to short-circuit regime in the electrical networks. The arc appearance and its behaviour were explored with a dedicafed optical sqstem. An example of spatial and temporal distribution of the arc light intensity is presented. Specific peculiarities of the optical spectra recorded in the proximi@ of the short circuit current zero (C.Z.) moments are reported. Different current interruption situations are correlated with plasma spectral diagnosis. On this basis the authors try to define a set of plasma parameters which are critical in the studied interruption processes.","PeriodicalId":137370,"journal":{"name":"XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125410544","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}
Pub Date : 2004-09-27DOI: 10.1109/DEIV.2004.1418615
Yujun Zhang, Yu-dong Huang, Feng-fu Li, Lei Wang, Zhenhao Jin
The poly(ethylene-co-vinyl alcohol) (EVOH) non-woven fabrics are prepared by electrospinning technique. The influence factors - the spinning electric voltage (Vs), capillary-screen distance (C-SD), aqua density (W E ) which affect the fiber diameter and their distribution of the tiny pore in the non-woven fabrics are discussed and the SEM is utilized to characterize the features of the non-woven fabrics. The study results show that the non-woven fabrics could be prepared by electrospinning technique when the Vs is 10∼40KV, C-SD is 20∼30cm, and the diameter of the fiber electrospun on this condition will be around 0.8∼5.0pm under the solvent of isopropyl alcohol/ water and 50∼200nm under the solvent of N,N'-dimethylacetamide; The diameter of the fiber will be affected mainly by W E , V S during the electrospinning, the diameter of the fiber increased with W E and decreased with V S ; the diameter of the pore in the non-woven fabrics will be influenced greatly by the condition of receiver-plate and decrease with V S . Finally the changes of relative surface potential with decay time caused by corona discharge are tested on the electrospun EVOH non-woven fabrics in this article.
{"title":"Electrospun non-woven mats of EVOH","authors":"Yujun Zhang, Yu-dong Huang, Feng-fu Li, Lei Wang, Zhenhao Jin","doi":"10.1109/DEIV.2004.1418615","DOIUrl":"https://doi.org/10.1109/DEIV.2004.1418615","url":null,"abstract":"The poly(ethylene-co-vinyl alcohol) (EVOH) non-woven fabrics are prepared by electrospinning technique. The influence factors - the spinning electric voltage (Vs), capillary-screen distance (C-SD), aqua density (W E ) which affect the fiber diameter and their distribution of the tiny pore in the non-woven fabrics are discussed and the SEM is utilized to characterize the features of the non-woven fabrics. The study results show that the non-woven fabrics could be prepared by electrospinning technique when the Vs is 10∼40KV, C-SD is 20∼30cm, and the diameter of the fiber electrospun on this condition will be around 0.8∼5.0pm under the solvent of isopropyl alcohol/ water and 50∼200nm under the solvent of N,N'-dimethylacetamide; The diameter of the fiber will be affected mainly by W E , V S during the electrospinning, the diameter of the fiber increased with W E and decreased with V S ; the diameter of the pore in the non-woven fabrics will be influenced greatly by the condition of receiver-plate and decrease with V S . Finally the changes of relative surface potential with decay time caused by corona discharge are tested on the electrospun EVOH non-woven fabrics in this article.","PeriodicalId":137370,"journal":{"name":"XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115987035","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}
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