Pub Date : 2008-10-31DOI: 10.1109/ISEIM.2008.4664459
M. Natsui, Y. Echigo, T. Tanaka, Y. Ohki, T. Maeno
Pulsed electroacoustic (PEA) method is applied as a nondestructive technique to detect ion migration that progresses to the thickness direction in insulation composites for printed circuit boards. In both cases of a paper/phenol-resin composite and a glass/epoxy-resin composite, penetration of Cu migration into the bulk after aging was confirmed. Namely, a shift of the peak location of positive charge, which corresponds to the progress of migration in the aged composite, is observable by the PEA method.
{"title":"Detection of ion migration in composites for printed circuit boards by the pulsed electroacoustic method","authors":"M. Natsui, Y. Echigo, T. Tanaka, Y. Ohki, T. Maeno","doi":"10.1109/ISEIM.2008.4664459","DOIUrl":"https://doi.org/10.1109/ISEIM.2008.4664459","url":null,"abstract":"Pulsed electroacoustic (PEA) method is applied as a nondestructive technique to detect ion migration that progresses to the thickness direction in insulation composites for printed circuit boards. In both cases of a paper/phenol-resin composite and a glass/epoxy-resin composite, penetration of Cu migration into the bulk after aging was confirmed. Namely, a shift of the peak location of positive charge, which corresponds to the progress of migration in the aged composite, is observable by the PEA method.","PeriodicalId":158811,"journal":{"name":"2008 International Symposium on Electrical Insulating Materials (ISEIM 2008)","volume":"27 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116394311","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 : 2008-10-31DOI: 10.1109/ISEIM.2008.4664517
T. Kobayashi, T. Takai, Y. Murakami, M. Nagao, M. Satou, Y. Itou
To investigate possibility of the space charge measurement in the tape with a drug for percutaneous absorption and possibility of the control in space charge movement that might be corresponding to the drug movement by the external signal, the space charge was measured in the tape added a drug for percutaneous absorption. The positive space charge caused by addition a drug was accumulated in the sample and travels to the cathode under the DC voltage. The apparent mobility in an acrylic adhesive was faster with increasing the drug content as well as the result from the conduction current measurement. It was considered that the conductivity increased in an acrylic adhesive by the movement of the drug, bringing higher carrier density and/or higher mobility. The accumulated charge was also measured under the voltage. The accumulated charge in the sample with a diffusion time at short time after the voltage application was bigger than that without a diffusion time. From these results, it was suggested that there was a possibility that the electrical field would control the movement of a drug.
{"title":"Temporal change of accumulated charge and diffusion of drug in tape for percutaneous absorption","authors":"T. Kobayashi, T. Takai, Y. Murakami, M. Nagao, M. Satou, Y. Itou","doi":"10.1109/ISEIM.2008.4664517","DOIUrl":"https://doi.org/10.1109/ISEIM.2008.4664517","url":null,"abstract":"To investigate possibility of the space charge measurement in the tape with a drug for percutaneous absorption and possibility of the control in space charge movement that might be corresponding to the drug movement by the external signal, the space charge was measured in the tape added a drug for percutaneous absorption. The positive space charge caused by addition a drug was accumulated in the sample and travels to the cathode under the DC voltage. The apparent mobility in an acrylic adhesive was faster with increasing the drug content as well as the result from the conduction current measurement. It was considered that the conductivity increased in an acrylic adhesive by the movement of the drug, bringing higher carrier density and/or higher mobility. The accumulated charge was also measured under the voltage. The accumulated charge in the sample with a diffusion time at short time after the voltage application was bigger than that without a diffusion time. From these results, it was suggested that there was a possibility that the electrical field would control the movement of a drug.","PeriodicalId":158811,"journal":{"name":"2008 International Symposium on Electrical Insulating Materials (ISEIM 2008)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129844221","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 : 2008-10-31DOI: 10.1109/ISEIM.2008.4664532
T. Mizojiri, H. Murase, Y. Sawa, S. Maruyama, T. Nakajima, T. Hoshino
This paper deals with the method of PD detection with the sensor (antenna) put at the outside of the GIS tank. It pays attention to the flange of the spacer as a leakage place of the PD electromagnetic radiation. Three kinds of antennas are proposed and made for trial purposes. And comparative study of the three antennas with the internal PD sensor (disc coupler) used worldwide so far is made from the viewpoint of the sensitivity characteristic and the noise-resistant performance. As a result, it is concluded that one kind of antenna has equal or even higher sensitivity to/than the internal disc coupler, without remarkable inferiority about the noise-resistant performance in the frequency range from 1.2 GHz to 2.7 GHz.
{"title":"Sensitivities and noise-resistant performances of various PD sensors located outside a GIS","authors":"T. Mizojiri, H. Murase, Y. Sawa, S. Maruyama, T. Nakajima, T. Hoshino","doi":"10.1109/ISEIM.2008.4664532","DOIUrl":"https://doi.org/10.1109/ISEIM.2008.4664532","url":null,"abstract":"This paper deals with the method of PD detection with the sensor (antenna) put at the outside of the GIS tank. It pays attention to the flange of the spacer as a leakage place of the PD electromagnetic radiation. Three kinds of antennas are proposed and made for trial purposes. And comparative study of the three antennas with the internal PD sensor (disc coupler) used worldwide so far is made from the viewpoint of the sensitivity characteristic and the noise-resistant performance. As a result, it is concluded that one kind of antenna has equal or even higher sensitivity to/than the internal disc coupler, without remarkable inferiority about the noise-resistant performance in the frequency range from 1.2 GHz to 2.7 GHz.","PeriodicalId":158811,"journal":{"name":"2008 International Symposium on Electrical Insulating Materials (ISEIM 2008)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130317581","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 : 2008-10-31DOI: 10.1109/ISEIM.2008.4664498
K. Fujita, M. Kimura, H. Yoshokawa, T. Mori
For organic field effect transistors (OFETs), pentacene is often used as a typical semiconductor material and reported to have as high carrier mobility as a-Si. Dibenzochrysene (DBC) as well as pentacene consist of only aromatic rings. DBC can be synthesized by simple procedure and has higher solubility than pentacene. We studied film morphology of DBC fabricated by deposition or spin-coating. It was found that the morphology of DBC film depended on a deposition rate. The films fabricated by the deposition rate of 0.002 nm/s and by spin-coating were island structure and amorphous, respectively. The morphology of DBC films changed with time. The post films showed higher crystalline than before. We also studied the effect of buffer layer on the suppression of molecular migration.
{"title":"Film morphology of dibenzochrysene","authors":"K. Fujita, M. Kimura, H. Yoshokawa, T. Mori","doi":"10.1109/ISEIM.2008.4664498","DOIUrl":"https://doi.org/10.1109/ISEIM.2008.4664498","url":null,"abstract":"For organic field effect transistors (OFETs), pentacene is often used as a typical semiconductor material and reported to have as high carrier mobility as a-Si. Dibenzochrysene (DBC) as well as pentacene consist of only aromatic rings. DBC can be synthesized by simple procedure and has higher solubility than pentacene. We studied film morphology of DBC fabricated by deposition or spin-coating. It was found that the morphology of DBC film depended on a deposition rate. The films fabricated by the deposition rate of 0.002 nm/s and by spin-coating were island structure and amorphous, respectively. The morphology of DBC films changed with time. The post films showed higher crystalline than before. We also studied the effect of buffer layer on the suppression of molecular migration.","PeriodicalId":158811,"journal":{"name":"2008 International Symposium on Electrical Insulating Materials (ISEIM 2008)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122932085","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 : 2008-10-31DOI: 10.1109/ISEIM.2008.4664546
Zhien Zhu, Yewen Zhang, F. Zheng, Z. An
Though the space charge behavior of polyethylene under high DC or AC has been investigated and measured by many researchers, the results between different research groups have little comparability to each other. So itpsilas difficult to achieve a universal conclusion. A lot of experimental data and former research experiences we can acquire so far indicate that many factors affect space charge behavior in a certain extent, such as doping with some types of inorganic nano powders, heating treatment process and the materials of electrode, but there is little substantial change. The space charge behavior is extremely related to the types of polyethylene probably, i.e. the types of polyethylene lead to the difference of research results on the space charge behavior. This paper focuses on the space charge distribution in high electrical field and the isothermal decay in some kinds of LDPE including Exxon-Mobil LLDPE 4004, Sino-SPC JD 200 etc. by using the Pressure Wave Propagation Method.
{"title":"Preliminary study for space charge behavior of different types of polyethylene resin","authors":"Zhien Zhu, Yewen Zhang, F. Zheng, Z. An","doi":"10.1109/ISEIM.2008.4664546","DOIUrl":"https://doi.org/10.1109/ISEIM.2008.4664546","url":null,"abstract":"Though the space charge behavior of polyethylene under high DC or AC has been investigated and measured by many researchers, the results between different research groups have little comparability to each other. So itpsilas difficult to achieve a universal conclusion. A lot of experimental data and former research experiences we can acquire so far indicate that many factors affect space charge behavior in a certain extent, such as doping with some types of inorganic nano powders, heating treatment process and the materials of electrode, but there is little substantial change. The space charge behavior is extremely related to the types of polyethylene probably, i.e. the types of polyethylene lead to the difference of research results on the space charge behavior. This paper focuses on the space charge distribution in high electrical field and the isothermal decay in some kinds of LDPE including Exxon-Mobil LLDPE 4004, Sino-SPC JD 200 etc. by using the Pressure Wave Propagation Method.","PeriodicalId":158811,"journal":{"name":"2008 International Symposium on Electrical Insulating Materials (ISEIM 2008)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125925584","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 : 2008-10-31DOI: 10.1109/ISEIM.2008.4664492
Xingyi Huang, Chonung Kim, P. Jiang, Fei Liu, Zhe Li, Y. Yin
We investigated the influence of the surface modification of Al nanoparticles on the electrical conduction of polyethylene composites. Octyl-trimethoxysilane was used as a coupling agent for the treatment of Al nanoparticle. It was found that the incorporation of octyl groups onto the surface of Al nanoparticle altered the time dependence behaviors of polarization and depolarization current and increased the percolation threshold and the resistivity of the polyethylene composites. It is concluded that, based on our morphology observation of the nanocomposites, the improved electrical properties could be directly ascribed to the good dispersion and special electrical feature of the surface-treated nanoparticles in the polymer matrix.
{"title":"Electrical conductivity of polyethylene aluminum nanocomposites with different particle surface chemistry characteristics","authors":"Xingyi Huang, Chonung Kim, P. Jiang, Fei Liu, Zhe Li, Y. Yin","doi":"10.1109/ISEIM.2008.4664492","DOIUrl":"https://doi.org/10.1109/ISEIM.2008.4664492","url":null,"abstract":"We investigated the influence of the surface modification of Al nanoparticles on the electrical conduction of polyethylene composites. Octyl-trimethoxysilane was used as a coupling agent for the treatment of Al nanoparticle. It was found that the incorporation of octyl groups onto the surface of Al nanoparticle altered the time dependence behaviors of polarization and depolarization current and increased the percolation threshold and the resistivity of the polyethylene composites. It is concluded that, based on our morphology observation of the nanocomposites, the improved electrical properties could be directly ascribed to the good dispersion and special electrical feature of the surface-treated nanoparticles in the polymer matrix.","PeriodicalId":158811,"journal":{"name":"2008 International Symposium on Electrical Insulating Materials (ISEIM 2008)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126723415","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 : 2008-10-31DOI: 10.1109/ISEIM.2008.4664572
A. Baba, K. Kanda, T. Ohno, Y. Ohdaira, K. Shinbo, K. Kato, F. Kaneko
In this study, we report on multimode surface plasmon excitation on metallic diffraction gratings where the grating pitch is much larger than standard grating coupling surface plasmon excitation technique. With the gratings, multimode surface plasmons can be excited at the same time in the wavelength region using a white light source irradiation on the gratings. The grating coupling surface plasmon excitation was also studied by comparing with the theoretical surface plasmon dispersion curves.
{"title":"Multimode surface plasmon excitation on metallic diffraction gratings","authors":"A. Baba, K. Kanda, T. Ohno, Y. Ohdaira, K. Shinbo, K. Kato, F. Kaneko","doi":"10.1109/ISEIM.2008.4664572","DOIUrl":"https://doi.org/10.1109/ISEIM.2008.4664572","url":null,"abstract":"In this study, we report on multimode surface plasmon excitation on metallic diffraction gratings where the grating pitch is much larger than standard grating coupling surface plasmon excitation technique. With the gratings, multimode surface plasmons can be excited at the same time in the wavelength region using a white light source irradiation on the gratings. The grating coupling surface plasmon excitation was also studied by comparing with the theoretical surface plasmon dispersion curves.","PeriodicalId":158811,"journal":{"name":"2008 International Symposium on Electrical Insulating Materials (ISEIM 2008)","volume":"56 27","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120870942","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 : 2008-10-31DOI: 10.1109/ISEIM.2008.4664540
Xiaolin Chen, Yonghong Cheng, Kai Wu, Shengnan Wu
A two-component composite material is simulated by 8times8times8 cubic cells, containing a spherical inclusion in each of them. A series of produced random numbers are regarded as the radii of these spherical inclusions to simulate the size distribution of inclusions. The finite element method (FEM) is applied to solve the potential distribution and the effective permittivity is calculated by the energy balance. Because the developed simulation model is anisotropic, in order to get the macroscopical dielectric properties of isotropic composites, a statistical mean method for the permittivities in three orthogonal orientations is adopted to calculate the effective permittivity. Based on the simulation model and calculation procedure, the interfacial polarization and its influence on the effective complex permittivity of composites are investigated.
{"title":"Interfacial polarization and its influence on effective complex permittivity of mixtures","authors":"Xiaolin Chen, Yonghong Cheng, Kai Wu, Shengnan Wu","doi":"10.1109/ISEIM.2008.4664540","DOIUrl":"https://doi.org/10.1109/ISEIM.2008.4664540","url":null,"abstract":"A two-component composite material is simulated by 8times8times8 cubic cells, containing a spherical inclusion in each of them. A series of produced random numbers are regarded as the radii of these spherical inclusions to simulate the size distribution of inclusions. The finite element method (FEM) is applied to solve the potential distribution and the effective permittivity is calculated by the energy balance. Because the developed simulation model is anisotropic, in order to get the macroscopical dielectric properties of isotropic composites, a statistical mean method for the permittivities in three orthogonal orientations is adopted to calculate the effective permittivity. Based on the simulation model and calculation procedure, the interfacial polarization and its influence on the effective complex permittivity of composites are investigated.","PeriodicalId":158811,"journal":{"name":"2008 International Symposium on Electrical Insulating Materials (ISEIM 2008)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126303610","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 : 2008-10-31DOI: 10.1109/ISEIM.2008.4664443
Myonghwan Kim, June-Ho Lee, J. Koo, Minho Song
A precise information on spatial distributions of temperature are important for diagnosing power transformers and evaluating its life because a power system failure will result in an enormous loss in tangible as well as social. The optical fiber Bragg grating (FBG) sensors, which have been studied intensively for last decade, can be very efficient tools for applications to above mentioned purpose because these are immune to EMI and can be highly multiplexed, which enables efficient quasi-distributed temperature sensing along tens of km range. We proposed a fiber-optic temperature monitoring system with an array of over 4 sensor gratings. The temperature-induced Bragg wavelength variations are accurately monitored by a scanned tunable wavelength filter. Differential measurement with temperature-stabilized reference gratings and a Gaussian curve-fitting algorithm has been used to enhance measurement accuracy, which obtained temperature resolution of ~0.6degC, and linearity error less than 0.4 %.
{"title":"A study on internal temperature monitoring system for power transformer using pptical fiber Bragg grating sensors","authors":"Myonghwan Kim, June-Ho Lee, J. Koo, Minho Song","doi":"10.1109/ISEIM.2008.4664443","DOIUrl":"https://doi.org/10.1109/ISEIM.2008.4664443","url":null,"abstract":"A precise information on spatial distributions of temperature are important for diagnosing power transformers and evaluating its life because a power system failure will result in an enormous loss in tangible as well as social. The optical fiber Bragg grating (FBG) sensors, which have been studied intensively for last decade, can be very efficient tools for applications to above mentioned purpose because these are immune to EMI and can be highly multiplexed, which enables efficient quasi-distributed temperature sensing along tens of km range. We proposed a fiber-optic temperature monitoring system with an array of over 4 sensor gratings. The temperature-induced Bragg wavelength variations are accurately monitored by a scanned tunable wavelength filter. Differential measurement with temperature-stabilized reference gratings and a Gaussian curve-fitting algorithm has been used to enhance measurement accuracy, which obtained temperature resolution of ~0.6degC, and linearity error less than 0.4 %.","PeriodicalId":158811,"journal":{"name":"2008 International Symposium on Electrical Insulating Materials (ISEIM 2008)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126612664","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}
This contribution reports the fabrication of pentacene organic field-effect transistor (OFET) with designed space-charge. By including a single layer of silicon nanoparticles as trapping centers, it was possible to create a space-charge field with strong influence on carrier injection and transport. It was found that NPs work as trapping centers of charge carriers. We demonstrate that nanoparticles film can serves for design of accumulated charge in OFET and thus change of charge injection time and transport properties. This behaviour is fully supported by theoretical analysis of the Maxwell-Wagner model. This gives us powerful tool for voltage control of carrier injection time by applied voltage and by setup of nanoparticle density is a possible design electric property.
{"title":"Trapping centers engineering by including of nanoparticles into organic semiconductors","authors":"M. Weis, T. Manaka, M. Iwamoto","doi":"10.1063/1.3033403","DOIUrl":"https://doi.org/10.1063/1.3033403","url":null,"abstract":"This contribution reports the fabrication of pentacene organic field-effect transistor (OFET) with designed space-charge. By including a single layer of silicon nanoparticles as trapping centers, it was possible to create a space-charge field with strong influence on carrier injection and transport. It was found that NPs work as trapping centers of charge carriers. We demonstrate that nanoparticles film can serves for design of accumulated charge in OFET and thus change of charge injection time and transport properties. This behaviour is fully supported by theoretical analysis of the Maxwell-Wagner model. This gives us powerful tool for voltage control of carrier injection time by applied voltage and by setup of nanoparticle density is a possible design electric property.","PeriodicalId":158811,"journal":{"name":"2008 International Symposium on Electrical Insulating Materials (ISEIM 2008)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127796869","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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