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Proceedings. 11th International Symposium on Electrets最新文献

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Investigation of the trap states in quenched and annealed nylon 6 films using thermally stimulated depolarization current 用热激退极化电流研究淬火和退火尼龙6薄膜中的陷阱态
Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1042960
J. Zhu, X.Y. Zhang, J. Dai, H. Chan
{"title":"Investigation of the trap states in quenched and annealed nylon 6 films using thermally stimulated depolarization current","authors":"J. Zhu, X.Y. Zhang, J. Dai, H. Chan","doi":"10.1109/ISE.2002.1042960","DOIUrl":"https://doi.org/10.1109/ISE.2002.1042960","url":null,"abstract":"Quenched and annealed nylon 6 films were prepared and their short-circuit thermally stimulated depolarization current (TSDC) has been measured using a modified thermal electric analyzer. The space charge peak in the temperature range of 90/spl deg/C/spl sim/180/spl deg/C observed in the TSDC spectra of different samples showed that the trap state of the films shifted to lower temperature as annealing time increased. In general, the trap state became shallower in the annealed sample. The result was consistent with the structural transition of quenched /spl beta/ form to annealed /spl alpha/ form. FTIR spectrum and X-ray diffraction were also used to examine the transition. According to the analysis of the phase transition, structural origin of the TSDC peaks has been proposed.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"31 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":"128276215","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: 5
Influence of porosity on stability of charge storage and piezoelectricity for porous PTFE film electrets 孔隙率对多孔PTFE薄膜驻极体电荷存储稳定性和压电性的影响
Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1043009
Z. Xia, S. Ma, X. Qiu, Y. Wu, F. Wang, Y. Zhang
{"title":"Influence of porosity on stability of charge storage and piezoelectricity for porous PTFE film electrets","authors":"Z. Xia, S. Ma, X. Qiu, Y. Wu, F. Wang, Y. Zhang","doi":"10.1109/ISE.2002.1043009","DOIUrl":"https://doi.org/10.1109/ISE.2002.1043009","url":null,"abstract":"In this paper, the influence of porosity on the piezoelectric d/sub 33/ coefficient, charge storage stability and thermal stability of piezoelectricity in porous PTFE electrets is studied. The results point out that with the increase of porosity, the piezoelectric coefficient of the film goes up, and the thermal stability of space charge storage and piezoelectricity is improved. The reasons for the influence of porosity on the piezoelectric coefficient, the charge storage stability and the thermal stability of piezoelectricity are also investigated. Our results also demonstrate that the improvement of the thermal stability of the piezoelectric coefficient at increasing porosity is due to improved thermal charge stability and the improved stability of the mechanical properties of the material.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"34 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":"129592136","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: 7
Recent approaches in electret research in India and study of polarization in new advanced materials 印度驻极体研究的最新进展和新型先进材料中极化的研究
Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1042971
M. Goel
{"title":"Recent approaches in electret research in India and study of polarization in new advanced materials","authors":"M. Goel","doi":"10.1109/ISE.2002.1042971","DOIUrl":"https://doi.org/10.1109/ISE.2002.1042971","url":null,"abstract":"From the very beginning, electret research in India was pursued with two fold objectives; development of human resources and search for new advanced materials. Major thrust of electret research in 1970s & 1980s was on organic-dielectrics; polymers, their blends and composites; piezo and pyro-electric materials; bio-polymers and electro-optic materials. Thermally stimulated depolarization current studies have provided a valuable contribution to the understanding of mechanism of charge production and its persistence in new polymeric materials. In 1990s, studies on opto-electronic interaction in non-linear optical and piezoelectric polymer composites have been carried out for developing tailor-made nano-materials. In the present paper, results obtained by different groups are briefly reviewed.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"14 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":"131601889","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
PLZT based MEMS device 基于PLZT的MEMS器件
Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1043026
R. Singh, A. Tripathi, S. Chandra, T. C. Goel
{"title":"PLZT based MEMS device","authors":"R. Singh, A. Tripathi, S. Chandra, T. C. Goel","doi":"10.1109/ISE.2002.1043026","DOIUrl":"https://doi.org/10.1109/ISE.2002.1043026","url":null,"abstract":"Pb(Zr,Ti)O/sub 3/, PZT thin films and their modified compositions have attracted great attention in recent years for their use in microelectromechanical systems (MEMS). In this paper, lanthanum modified PZT thin films have been deposited on platinised silicon. The parameters, saturation polarization (P/sub S/), remanent polarization (P/sub R/) and coercive field (E/sub C/) of the polarization-electric field hysteresis loop are presented for 0.5 /spl mu/m thick PLZT thin film of composition (8/60/40). The structural and dielectric properties of the film are also presented. To show the possible integration of the piezoelectric films in MEMS, a simple device has been fabricated using silicon micromachining technology. The resonance frequency of this device was measured as 8.45 MHz and the device was tested for a vibration sensor.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"97 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":"134373115","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
Can non-destructive space charge measurement techniques have fallout in other fields? 非破坏性空间电荷测量技术会对其他领域产生影响吗?
Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1042938
S. Holé, T. Ditchi, J. Lewiner
{"title":"Can non-destructive space charge measurement techniques have fallout in other fields?","authors":"S. Holé, T. Ditchi, J. Lewiner","doi":"10.1109/ISE.2002.1042938","DOIUrl":"https://doi.org/10.1109/ISE.2002.1042938","url":null,"abstract":"For more than 20 years, non-destructive space charge distribution measurement techniques have been successfully used to study electrical phenomena in insulators and dielectrics. Where other experimental techniques would require various hypotheses, they give directly spatial information. The implementation is carried out by producing a perturbation within the sample which may involve thermal diffusion, elastic wave propagation or electrical stress. A recent physical study of these methods gives a vision that offers new types of applications. In this paper the question of complex geometry sample and of free charge detection is considered.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"189 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":"134640050","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: 11
CuPc film nitrogen dioxide gas sensor based on hole injection 基于孔注的CuPc膜二氧化氮气体传感器
Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1043013
T. Wang, Y.D. Jiang, G. Xie, J.H. Xu, Z.M. Wu, C.H. Huang
{"title":"CuPc film nitrogen dioxide gas sensor based on hole injection","authors":"T. Wang, Y.D. Jiang, G. Xie, J.H. Xu, Z.M. Wu, C.H. Huang","doi":"10.1109/ISE.2002.1043013","DOIUrl":"https://doi.org/10.1109/ISE.2002.1043013","url":null,"abstract":"In this paper a novel type of copper phthalocyanine (CuPc) film nitrogen dioxide (NO/sub 2/) gas sensor based on hole injection was discussed. The sensor structure is Al/sub 2/O/sub 3//ITO/CuPc/Al: ITO (indium-tin-oxide) film prepared by DC magnetron reactive sputtering was used as underside electrode, while CuPc film prepared by vacuum evaporation was used as the sensitive functional layer. The work function of ITO is high and close to the HOMO (highest occupied molecular orbital) energy level of CuPc. When there is an offset voltage between ITO and Al, holes were injected from ITO into CuPc and the holes accumulated at the surface of the CuPc, thus the surface resistivity of CuPc and the resistance of the gas sensor decreases greatly. The preparation method, sensitive mechanism and sensitivity properties were discussed. Compared to the traditional CuPc film NO/sub 2/ gas sensor (Al/sub 2/O/sub 3//Al/CuPc) this kind of sensor has better sensitivity, shorter response and recovery time, better humidity resistivity, and its resistance decreases by 3/spl sim/4 order of magnitude.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"100 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":"116679416","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
Properties of liquid flow in circulatory system with novel EHD pump 新型EHD泵循环系统液体流动特性研究
Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1042997
R. Hanaoka, S. Takata, Hiroyuki Nakamichi, T. Fukami, M. Shimbo
{"title":"Properties of liquid flow in circulatory system with novel EHD pump","authors":"R. Hanaoka, S. Takata, Hiroyuki Nakamichi, T. Fukami, M. Shimbo","doi":"10.1109/ISE.2002.1042997","DOIUrl":"https://doi.org/10.1109/ISE.2002.1042997","url":null,"abstract":"Using EHD pumps arranged a pseudo-doughnut electrode against a grounded plane or sphere electrode, the flow in the liquid circulatory system was examined. When a dc voltage was applied to the electrode, the liquid circulated soundlessly and slowly through an insulating pipe of the circulatory system. The special nozzle in which was termed spiral nozzle was designed in order to create a more effective liquid flow. This nozzle can make the spiral structure of liquid jets emerging from the outlet of nozzle. The fluid frictions which act on the circulating liquid can be decreased by the spiral liquid jet. In this paper, the spiral structure of jets has been analyzed using the basic equations of fluid mechanics.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"1 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":"130560266","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
Piezoelectric properties in sub-micron ferroelectric polymer films 亚微米铁电聚合物薄膜的压电特性
Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1043022
I. Guy, Z. Zheng
{"title":"Piezoelectric properties in sub-micron ferroelectric polymer films","authors":"I. Guy, Z. Zheng","doi":"10.1109/ISE.2002.1043022","DOIUrl":"https://doi.org/10.1109/ISE.2002.1043022","url":null,"abstract":"The piezoelectric and electrostrictive response of spun cast films of the ferroelectric vinylidene fluoride/trifluoroethylene copolymers, with thicknesses around 100 nm, have been measured. The measurements have been carried out both on a macroscopic scale, using interferometry, and on a microscopic scale using atomic force microscopy. The interferometry results suggest that in samples exposed to a constant external electric field, the biased electrostrictive response causes a significant decrease in the apparent piezoelectric response. The atomic force microscope results allow the observation of electromechanical activity at the scale of the individual crystallites. Preliminary results from unpoled films suggest that the electrostrictive response is largest in the region at the interface of the crystalline and amorphous phases. A small piezoelectric response is also observed in this region, possibly arising from biased electrostriction.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"46 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":"124126148","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
Charge decay and space charge in corona-charged LDPE 电晕带电LDPE中的电荷衰减与空间电荷
Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1042934
T. Mizutani, Y. Taniguchi, M. Ishioka
{"title":"Charge decay and space charge in corona-charged LDPE","authors":"T. Mizutani, Y. Taniguchi, M. Ishioka","doi":"10.1109/ISE.2002.1042934","DOIUrl":"https://doi.org/10.1109/ISE.2002.1042934","url":null,"abstract":"The surface charge decay and space charge distribution in corona-charged low-density polyethylene (LDPE) were investigated. The space charge distribution was measured at 30/spl deg/C with the pulsed electro-acoustic (PEA) method, where a corona charged specimen was set between a semiconductive electrode and an Al electrode. The space charge distributions in LDPE were quite different between corona charging and DC voltage charging. They also depended on the kind of low-density polyethylene, LDPE polymerized with the high-pressure process and m-LDPE polymerized with metallocene catalysts. The surface charge decay of corona-charged polyethylene is slower for m-LDPE than for LDPE. Especially, positive charge is very stable for m-LDPE. These results were discussed considering the morphology of polyethylene.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"47 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":"127128455","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: 8
High performance polyvinylidene fluoride films prepared by solid-state coextrusion 固态共挤法制备高性能聚偏氟乙烯薄膜
Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1043021
T. Furukawa, K. Kano, Y. Takahashi, K. Nakamura, T. Kanamoto
{"title":"High performance polyvinylidene fluoride films prepared by solid-state coextrusion","authors":"T. Furukawa, K. Kano, Y. Takahashi, K. Nakamura, T. Kanamoto","doi":"10.1109/ISE.2002.1043021","DOIUrl":"https://doi.org/10.1109/ISE.2002.1043021","url":null,"abstract":"High performance polyvinylidene fluoride films were successfully obtained by solid-state coextrusion of dry gel films to an extrusion draw ratio of 9. They exhibit square D-E hysteresis loops with remanent polarization 100 mC/m/sup 2/. The electromechanical coupling coefficient determined by thickness extensional mode piezoelectric resonance reaches 0.27. These values are 60% greater than those obtained for conventional uniaxially-drawn PVDF films. The electromechanical data taken over a broad temperature range are presented and the factors that achieve high performance are discussed.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"37 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":"126980820","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
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