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6th International Symposium on Electrets,(ISE 6) Proceedings.最新文献

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A study of absorption currents in acrylic acid-doped polystyrene 丙烯酸掺杂聚苯乙烯的吸收电流研究
6th International Symposium on Electrets,(ISE 6) Proceedings. Pub Date : 1988-09-01 DOI: 10.1109/ISE.1988.38570
R. Singh, R. Baghel, J. Keller, S. Datt
{"title":"A study of absorption currents in acrylic acid-doped polystyrene","authors":"R. Singh, R. Baghel, J. Keller, S. Datt","doi":"10.1109/ISE.1988.38570","DOIUrl":"https://doi.org/10.1109/ISE.1988.38570","url":null,"abstract":"The absorption currents in the discharge mode of acrylic-acid (AA)-doped solution-grown polystyrene (PS) films, prepolarized at 358 K with different fields, have been analyzed in the temperature range 313-358 K. Space charge due to trapping of injected charge carriers in energetically distributed traps is considered to account for the observed currents. Two relaxation peaks centered at 328 K and approximately at 348 K, respectively have been observed in isochronal current thermograms.<<ETX>>","PeriodicalId":199976,"journal":{"name":"6th International Symposium on Electrets,(ISE 6) Proceedings.","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124410826","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
Effects of plasma treatment of surfaces of charge storage in polypropylene 等离子体处理对聚丙烯储电荷表面的影响
6th International Symposium on Electrets,(ISE 6) Proceedings. Pub Date : 1988-09-01 DOI: 10.1109/ISE.1988.38646
Hui-juan Zhao, D. Tu, Liang-yu Gao, Yaonan Liu, K. Kao
{"title":"Effects of plasma treatment of surfaces of charge storage in polypropylene","authors":"Hui-juan Zhao, D. Tu, Liang-yu Gao, Yaonan Liu, K. Kao","doi":"10.1109/ISE.1988.38646","DOIUrl":"https://doi.org/10.1109/ISE.1988.38646","url":null,"abstract":"On the surfaces of polypropylene samples treated in an 800-kHz plasma of air at low temperatures, the level of charge storage is increased. This charge storage is found to depend strongly on the plasma treatment and charge injection conditions. Under optimal conditions, polypropylene with plasma treatment can store about 50% on average more charge. The thermally stimulated charge decay becomes much slower than for samples without treatment. Infrared absorption and photoconductivity spectra indicate that the plasma treatment enhances the formation of C=O and C=C bonds and the degree of crystallinity, which results in an increase of polar groups and deep traps.<<ETX>>","PeriodicalId":199976,"journal":{"name":"6th International Symposium on Electrets,(ISE 6) Proceedings.","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126085359","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
Polarization distributions in isotropic, stretched or annealed PVDF films 各向同性、拉伸或退火PVDF薄膜的极化分布
6th International Symposium on Electrets,(ISE 6) Proceedings. Pub Date : 1988-09-01 DOI: 10.1109/ISE.1988.38516
E. Bihler, K. Holdik, W. Eisenmenger
{"title":"Polarization distributions in isotropic, stretched or annealed PVDF films","authors":"E. Bihler, K. Holdik, W. Eisenmenger","doi":"10.1109/ISE.1988.38516","DOIUrl":"https://doi.org/10.1109/ISE.1988.38516","url":null,"abstract":"The spatial distribution of the polarization in polyvinylidene fluoride (PVDF) films was measured at room temperature with the PPS (piezoelectric pressure step) method. In order to investigate the time development under external fields, a thin insulation polyethylene terephthalate (PET) film covering an evaporated aluminium electrode was inserted between the sample and the measuring electrode. The observed development of inhomogeneous and internal polarization zones is attributed to charge injection and charge trapping at the polarization zone boundaries. The polarization zone develops at a position where the critical field strength for dipole orientation in the crystallites is exceeded by the approach of injected homocharges (or without injection by the depletion of internal homocharges and the excess of heterocharges). The critical field for alpha -crystallites corresponds to an electric field phase transition at 1.2 MV/cm. The development of central polarization zones in PVDF containing beta -crystallites indicates injection of charges with both signs and almost equal mobility. The results indicate that the beta -crystallites determine the charge injection rate or the mobility or both.<<ETX>>","PeriodicalId":199976,"journal":{"name":"6th International Symposium on Electrets,(ISE 6) Proceedings.","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126773408","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: 23
The luminescence stimulated by temperature change of crystalline films of ni-isopropylcarbazole ni-异丙基咔唑晶体薄膜在温度变化下的发光特性
6th International Symposium on Electrets,(ISE 6) Proceedings. Pub Date : 1988-09-01 DOI: 10.1109/ISE.1988.38648
Z. Dreger, J. Kalinowski, R. Nowak, J. Sworakowski
{"title":"The luminescence stimulated by temperature change of crystalline films of ni-isopropylcarbazole","authors":"Z. Dreger, J. Kalinowski, R. Nowak, J. Sworakowski","doi":"10.1109/ISE.1988.38648","DOIUrl":"https://doi.org/10.1109/ISE.1988.38648","url":null,"abstract":"Spontaneous emission of light stimulated by temperature change of vacuum-evaporated crystalline layers of n-isopropylcarbazole (NIPC) has been studied between 100 and 300 K. A theoretical model is presented and the temperature evolution of the luminescence is derived, including the effects of electrical discharge. Exceeding the strength threshold and stress/temperature-induced phase transitions of microcrystallites are assumed to be the physical mechanisms responsible for the cracking.<<ETX>>","PeriodicalId":199976,"journal":{"name":"6th International Symposium on Electrets,(ISE 6) Proceedings.","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122287665","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 formation of deep traps in the near surface layers of fluoropolymer corona electrets 含氟聚合物电晕驻极体近表层深层陷阱的形成
6th International Symposium on Electrets,(ISE 6) Proceedings. Pub Date : 1988-09-01 DOI: 10.1109/ISE.1988.38599
V. G. Boitsov, A. Rychkov, V.V. Schvetz
{"title":"The formation of deep traps in the near surface layers of fluoropolymer corona electrets","authors":"V. G. Boitsov, A. Rychkov, V.V. Schvetz","doi":"10.1109/ISE.1988.38599","DOIUrl":"https://doi.org/10.1109/ISE.1988.38599","url":null,"abstract":"Summary form only given, as follows. The stability of a positive homocharge in nonpolar fluoropolymer corona electrets is due to the polymer surface states. Electret stability can be controlled by changing the trapping-level spectrum in the thin, near-surface dielectric layers. The methods of formation of deep traps in fluoropolymer dielectrics before polarization and in the process of the electret state formation are considered. It is shown that the formation of deep traps for the positive homocharge in fluoropolymer dielectrics essentially depends on the duration of the adsorption process. The fraction of deep traps in the surface-state spectrum increases with duration of treatment. This process is considerably intensified during the treatment of films initially charged by positive homocharge or during triboactivation of surface in the process of treatment. On the basis of the model conceptions the energy spectrum of near-surface trap layers of polymer is determined, and the correlation of the spectrum with the surface structure is established.<<ETX>>","PeriodicalId":199976,"journal":{"name":"6th International Symposium on Electrets,(ISE 6) Proceedings.","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114514761","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
Thermally stimulated and isothermal discharge of corona-charged polypropylene 电晕带电聚丙烯的热刺激和等温放电
6th International Symposium on Electrets,(ISE 6) Proceedings. Pub Date : 1988-09-01 DOI: 10.1109/ISE.1988.38571
R. Singh, J. Keller, S. Datt
{"title":"Thermally stimulated and isothermal discharge of corona-charged polypropylene","authors":"R. Singh, J. Keller, S. Datt","doi":"10.1109/ISE.1988.38571","DOIUrl":"https://doi.org/10.1109/ISE.1988.38571","url":null,"abstract":"Details are reported of short- and open-circuit thermally stimulated current (TSC), isothermal charge decay, and absorption current measurements. These measurements were conducted on corona-charged 50- mu m-thick commercial-grade isotactic polypropylene (PP). The appearance of a peak centered at 140 degrees C in open-circuit TSCs that is absent in short-circuit TSCs shows that this peak is due to the charge trapped in trapping sites located at the surface or in the near-surface region. However, the traps giving rise to three other peaks common to both type of TSCs are clearly bulk traps. Anomalous short-circuit TSCs (flowing in the same direction as the charging current), observed for high-temperature-charged samples, can be understood in terms of space-charge-limited drift of charge carriers toward the collecting electrode.<<ETX>>","PeriodicalId":199976,"journal":{"name":"6th International Symposium on Electrets,(ISE 6) Proceedings.","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117077059","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
Space-charge distributions in electron-beam charged Mylar and Kapton films 电子束带电聚酯薄膜和卡普顿薄膜中的空间电荷分布
6th International Symposium on Electrets,(ISE 6) Proceedings. Pub Date : 1988-09-01 DOI: 10.1109/ISE.1988.38526
J. West, H. Wintle, A. Berraissoul, G. Sessler
{"title":"Space-charge distributions in electron-beam charged Mylar and Kapton films","authors":"J. West, H. Wintle, A. Berraissoul, G. Sessler","doi":"10.1109/ISE.1988.38526","DOIUrl":"https://doi.org/10.1109/ISE.1988.38526","url":null,"abstract":"The method of laser-induced pressure pulses (LIPPs) was used to determine space-charge distributions in 22- mu m Mylar and Kapton films charged with 10- to 40-keV electron beams. For relatively low deposited-charge densities, corresponding to surface potentials below 300 V, two charge layers develop, one at the surface of the samples and one at a depth corresponding approximately to the electron range. For higher deposited-charge densities, when breakdown in the surrounding air occurs during pressurization, the surface charge layer is positive. For deposited-charge densities in excess of 1 mu C/cm/sup 2/, the space-charge layer is broader and, in the case of Kapton, is located deeper in the material than for smaller charge densities. Heating of the samples to 100 degrees C causes a decrease of the charge density without broadening of the charge layers.<<ETX>>","PeriodicalId":199976,"journal":{"name":"6th International Symposium on Electrets,(ISE 6) Proceedings.","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128997191","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
Investigation of crystalline orientation, thermodynamic properties and Curie transition of ferroelectric VF/sub 2//TrFE copolymers 铁电VF/sub //TrFE共聚物结晶取向、热力学性质及居里跃迁的研究
6th International Symposium on Electrets,(ISE 6) Proceedings. Pub Date : 1988-09-01 DOI: 10.1109/ISE.1988.38566
A. Chalumeau
{"title":"Investigation of crystalline orientation, thermodynamic properties and Curie transition of ferroelectric VF/sub 2//TrFE copolymers","authors":"A. Chalumeau","doi":"10.1109/ISE.1988.38566","DOIUrl":"https://doi.org/10.1109/ISE.1988.38566","url":null,"abstract":"Summary form only given, as follows. VF/sub 2//TrFE copolymers have been investigated by means of X-ray diffraction, differential scanning calorimetry, optical microscopy, and piezoelectric characterization. The orientation of crystalline axes has been determined by pole figure analysis as a function of poling and processing history Morphology and crystallization kinetics have been studied with an optical microscope, during isothermal crystallization on 70/30 copolymer. Thermodynamic equilibrium temperature and infinite crystal enthalpy were extrapolated from melting temperatures and heats of fusion, measured on DSC thermodiagrams. The influence of monomer composition, processing history, and poling on Curie transition have been investigated, and poling on Curie transition have been investigated, and the resulting piezoelectric characteristics have been determined.<<ETX>>","PeriodicalId":199976,"journal":{"name":"6th International Symposium on Electrets,(ISE 6) Proceedings.","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130675447","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
Charging, long-term-stability, and TSC-measurements of SiO/sub 2/-electrets SiO/ sub2 /-驻极体的充电、长期稳定性和tsc测量
6th International Symposium on Electrets,(ISE 6) Proceedings. Pub Date : 1988-09-01 DOI: 10.1109/ISE.1988.38537
P. Gunther
{"title":"Charging, long-term-stability, and TSC-measurements of SiO/sub 2/-electrets","authors":"P. Gunther","doi":"10.1109/ISE.1988.38537","DOIUrl":"https://doi.org/10.1109/ISE.1988.38537","url":null,"abstract":"SiO/sub 2/ layers of different thicknesses were either thermally grown or made by chemical vapor deposition on 2-in, p-type silicon wafers. The samples were positively and negatively charged by means of liquid-contact, corona, and electron-beam methods. The surface potential decay was observed at room temperature over a period of more than one year. The positively charge SiO/sub 2/ showed a somewhat faster decay than the negatively charged material. This corresponded to open-circuit thermally stimulated current measurements, where negatively charge samples showed a higher peak temperature than positively charged samples. Positive electron-beam charging yielded a higher peak temperature than positive corona charging. Activation energies of 1.0 eV and 1.4 eV were found for positively charged oxides, whereas for negatively charged samples activation energies of about 1.9 eV were calculated.<<ETX>>","PeriodicalId":199976,"journal":{"name":"6th International Symposium on Electrets,(ISE 6) Proceedings.","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124022695","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
Electrical properties of electrode-polyethylene-electrode structures 电极的电学性能-聚乙烯-电极结构
6th International Symposium on Electrets,(ISE 6) Proceedings. Pub Date : 1988-09-01 DOI: 10.1109/ISE.1988.38515
T. Ditchi, C. Alquié, J. Lewiner, R. Favrie, R. Jocteur
{"title":"Electrical properties of electrode-polyethylene-electrode structures","authors":"T. Ditchi, C. Alquié, J. Lewiner, R. Favrie, R. Jocteur","doi":"10.1109/ISE.1988.38515","DOIUrl":"https://doi.org/10.1109/ISE.1988.38515","url":null,"abstract":"The pressure wave propagation (PWP) method allows for the nondestructive measurement of charge distributions in dielectric materials. This method has been used to study the electrical properties of electrode-polyethylene-electrode structures such as those involved in high-voltage cables. The authors analyze in polyethylene samples the influence of the composition of the insulating resin itself and that of the electrodes. Depending on the combination chosen, charge transfer at the interfaces, migration of ionizable impurities, or a strong decrease of both effects are observed. This application of the PWP method is of particular interest since it allows for a suitable choice of the materials and structure involved in insulator-conductor interfaces.<<ETX>>","PeriodicalId":199976,"journal":{"name":"6th International Symposium on Electrets,(ISE 6) Proceedings.","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125642112","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: 9
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