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2017 International Symposium on Electrical Insulating Materials (ISEIM)最新文献

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Effects of addition of MgO fillers with various sizes and co-addition of nano-sized SiO2 fillers on the dielectric properties of epoxy resin 不同粒径MgO填料的加入和纳米SiO2填料的共加入对环氧树脂介电性能的影响
2017 International Symposium on Electrical Insulating Materials (ISEIM) Pub Date : 2017-12-04 DOI: 10.23919/ISEIM.2017.8166574
Ryosuke Yanashima, N. Hirai, Y. Ohki
{"title":"Effects of addition of MgO fillers with various sizes and co-addition of nano-sized SiO2 fillers on the dielectric properties of epoxy resin","authors":"Ryosuke Yanashima, N. Hirai, Y. Ohki","doi":"10.23919/ISEIM.2017.8166574","DOIUrl":"https://doi.org/10.23919/ISEIM.2017.8166574","url":null,"abstract":"Complex permittivity (ε r’ and ε r”)conductivity (σ), and glass transition temperature (Tg) were measured for composites of epoxy resin and MgO fillers with various sizes in a wide temperature and frequency range. The effect of co-addition of nano-sized SiO2 was also examined. It has become clean that Tg decreases by the addition of MgO fillers, and its decrement becomes more with a decrease in filler size. Moreover, Tg decreases if the silica nanofillers are co-added. However, all the three important parameters for electrical insulation ability of polymers, namely ε r’, ε r”, and σ, decrease with the decrease in size of MgO fillers or by the addition of silica nanofillers at high temperatures and low frequencies. This is a very astonishing result, since it seems reasonable that a polymer with a high Tg should have a better insulating ability. Probably, the above-mentioned results indicate that the charge transport becomes more difficult, presumably resulting from the suppression of molecular motion with the decrease in size of MgO fillers and by the co-addition of SiO2 nanofillers. This indicates that the suppression of molecular motion becomes very strong if the filler size is small, making the carrier transport difficult even in polymers with low Tg.","PeriodicalId":222058,"journal":{"name":"2017 International Symposium on Electrical Insulating Materials (ISEIM)","volume":"251 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114347773","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: 14
Insulation performance of safety-related cables for nuclear power plants under simulated severe accident conditions 核电厂安全相关电缆在模拟严重事故条件下的绝缘性能
2017 International Symposium on Electrical Insulating Materials (ISEIM) Pub Date : 2017-12-04 DOI: 10.1541/IEEJFMS.139.54
T. Minakawa, M. Ikeda, N. Hirai, Y. Ohki
{"title":"Insulation performance of safety-related cables for nuclear power plants under simulated severe accident conditions","authors":"T. Minakawa, M. Ikeda, N. Hirai, Y. Ohki","doi":"10.1541/IEEJFMS.139.54","DOIUrl":"https://doi.org/10.1541/IEEJFMS.139.54","url":null,"abstract":"To examine electrical insulation behavior of cables under severe accident environmental conditions, safety-related low voltage cables used as severe accident management equipment were subjected to two tests that simulated two environments: 1) at 155°C, which is the simulated highest assumed temperature when proper accident management measures are taken, 2) at 200°C, which is the maximum durable temperature of a primary containment vessel. In addition, electrical insulation resistance was measured for the cables during steam exposure in the two tests. As a result, all the cables passed the acceptance criteria of the tests. The minimum volume resistivity of the cables during the test at 155°C was around 108Om, confirming that the cables have a sufficient insulation performance. On the other hand, the minimum volume resistivity during the severer test at 200°C was around 105Om due to the increase in leak current.","PeriodicalId":222058,"journal":{"name":"2017 International Symposium on Electrical Insulating Materials (ISEIM)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128929336","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
Terahertz absorption spectroscopy of poly(ether ether ketone) 聚醚醚酮的太赫兹吸收光谱
2017 International Symposium on Electrical Insulating Materials (ISEIM) Pub Date : 2017-12-04 DOI: 10.23919/ISEIM.2017.8166545
T. Kaneko, N. Hirai, Y. Ohki
{"title":"Terahertz absorption spectroscopy of poly(ether ether ketone)","authors":"T. Kaneko, N. Hirai, Y. Ohki","doi":"10.23919/ISEIM.2017.8166545","DOIUrl":"https://doi.org/10.23919/ISEIM.2017.8166545","url":null,"abstract":"The crystallinity of sheets of poly(ether ether ketone) (PEEK) was changed by thermal treatments conducted at 295 °C for various periods and their terahertz (THz) and Fourier-transform infrared absorption (FT-IR) spectra were obtained. As a result, it has been confirmed that an absorption peak appears at around 3.5 THz in the sheet samples that exhibit clear X-ray diffraction patterns at 2Θ = 18.8, 20.8, 22.8, and 28.8°. In contrast, no obvious sample-dependent changes were observed in FT-IR spectra. The absorption at around 3.5 THz shows a shift in frequency to a degree proportional to the crystallinity. Its maximum intensity is also in proportion to the crystallinity. These results indicate that the absorption at 3.62 THz has a close relation with the crystallinity of PEEK. This in turn means that the THz absorption spectroscopy can be used for estimating the crystallinity of PEEK.","PeriodicalId":222058,"journal":{"name":"2017 International Symposium on Electrical Insulating Materials (ISEIM)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125155844","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: 3
Correlation between indenter modulus and elongation-at-break observed for four electrical insulating polymers 四种电绝缘聚合物的压头模量与断裂伸长率之间的相关性
2017 International Symposium on Electrical Insulating Materials (ISEIM) Pub Date : 2017-12-04 DOI: 10.23919/ISEIM.2017.8166598
N. Hirai, Y. Ohki
{"title":"Correlation between indenter modulus and elongation-at-break observed for four electrical insulating polymers","authors":"N. Hirai, Y. Ohki","doi":"10.23919/ISEIM.2017.8166598","DOIUrl":"https://doi.org/10.23919/ISEIM.2017.8166598","url":null,"abstract":"The correlation between degradation-induced changes in two important indicators of mechanical properties, namely elongation at break (EAB) and indenter modulus (IM), is examined for flame-retardant ethylene propylene rubber (FR-EPR), silicone rubber (SiR), flame-retardant crosslinked polyethylene (FR-XLPE), and XLPE. The samples were degraded by heat or concurrently by heat and radiation. In the case that the polymers become hard after they were degraded, the two indicators show a good correlation. However, if they become brittle, their correlation is not good. Regarding this, their correlation is good in SiR, while it is not good in FR-XLPE and XLPE. In FR-EPR, the correlativity changes, depending on the aging condition and presumably its additives.","PeriodicalId":222058,"journal":{"name":"2017 International Symposium on Electrical Insulating Materials (ISEIM)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129144163","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: 10
Nanocomposite polypropylene for DC cables and capacitors: A new European project 用于直流电缆和电容器的纳米复合聚丙烯:一个新的欧洲项目
2017 International Symposium on Electrical Insulating Materials (ISEIM) Pub Date : 2017-10-30 DOI: 10.23919/ISEIM.2017.8088777
G. Montanari, P. Seri, M. Karttunen, M. Paajanen, K. Lahti, I. Rytöluoto
{"title":"Nanocomposite polypropylene for DC cables and capacitors: A new European project","authors":"G. Montanari, P. Seri, M. Karttunen, M. Paajanen, K. Lahti, I. Rytöluoto","doi":"10.23919/ISEIM.2017.8088777","DOIUrl":"https://doi.org/10.23919/ISEIM.2017.8088777","url":null,"abstract":"This paper presents the scientific background of a new European project, GRIDABLE, which was launched at the beginning of 2017 and has to deliver results in manufacturing and characterization of LV-MV capacitors and MV-HV cables for DC application. The innovation is in the development of nanostructured materials based on polypropylene and silica, and the relevant capacitor and cable manufacturing procedures. The initial results regarding the electrical properties of PP-SiO2 materials, which have brought to the proposal of this project, are presented in this paper, focusing on breakdown strength and space charge measurements performed on nanofilled PP films for capacitors.","PeriodicalId":222058,"journal":{"name":"2017 International Symposium on Electrical Insulating Materials (ISEIM)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121897668","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: 4
Nano-scale evaluation of electrical tree initiation in silica/epoxy nano-composite thin film 二氧化硅/环氧纳米复合薄膜中电树起始的纳米级评价
2017 International Symposium on Electrical Insulating Materials (ISEIM) Pub Date : 2017-10-27 DOI: 10.23919/ISEIM.2017.8088759
T. Onishi, S. Hashimoto, M. Tomita, Takanobu Watanabe, K. Mura, T. Tsuda, T. Yoshimitsu
{"title":"Nano-scale evaluation of electrical tree initiation in silica/epoxy nano-composite thin film","authors":"T. Onishi, S. Hashimoto, M. Tomita, Takanobu Watanabe, K. Mura, T. Tsuda, T. Yoshimitsu","doi":"10.23919/ISEIM.2017.8088759","DOIUrl":"https://doi.org/10.23919/ISEIM.2017.8088759","url":null,"abstract":"Many researchers have attempted use of nanocomposite (NC) materials for insulation systems at various places. A number of studies on the propagation of electrical trees have been reported, but it has not yet been clarified how the electrical tree occurs inside the NC material. In order to evaluate the origin of an electrical tree, it is important to clarify the breakdown mechanism at nano-scale. In this paper, silica/epoxy-resin NC was spin-coated on a silicon substrate and characterized by thin film analyses. The scanning electron microscope (SEM) indicates uniform dispersion of silica fillers in the NC film. The time-to-breakdown of the NC film, which is measured using micro-electrical probe system, is improved as the silica density increases. Furthermore, we succeeded in the scanning tunneling microscope (STM) observation of the NC film. Leakage sites appeared in the STM images, which were induced by the electric stress application with the STM tip. These approaches will invoke a deep understanding of the role of nano-fillers in the insulation resistance and the breakdown mechanism of NC materials.","PeriodicalId":222058,"journal":{"name":"2017 International Symposium on Electrical Insulating Materials (ISEIM)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114724299","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: 2
Terahertz absorption spectra of antioxidants in insulating polymers 绝缘聚合物中抗氧化剂的太赫兹吸收光谱
2017 International Symposium on Electrical Insulating Materials (ISEIM) Pub Date : 2017-10-27 DOI: 10.23919/ISEIM.2017.8088689
T. Kozai, T. Kaneko, N. Hirai, Y. Ohki
{"title":"Terahertz absorption spectra of antioxidants in insulating polymers","authors":"T. Kozai, T. Kaneko, N. Hirai, Y. Ohki","doi":"10.23919/ISEIM.2017.8088689","DOIUrl":"https://doi.org/10.23919/ISEIM.2017.8088689","url":null,"abstract":"Terahertz absorption spectra were measured for nine kinds of antioxidants. The spectra were also measured for low-density polyethylene sheets that contain each antioxidant with different contents. As a result, a fingerprint spectrum appears for each antioxidant, from which the antioxidants become distinguishable and their contents can be estimated.","PeriodicalId":222058,"journal":{"name":"2017 International Symposium on Electrical Insulating Materials (ISEIM)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123959777","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
A study on electric charge behaviors in polymeric materials using “direct current integrated charge method” 用“直流积分电荷法”研究高分子材料的电荷行为
2017 International Symposium on Electrical Insulating Materials (ISEIM) Pub Date : 2017-09-01 DOI: 10.23919/ISEIM.2017.8166584
Y. Sekiguchi, T. Takada, H. Miyake, Y. Tanaka
{"title":"A study on electric charge behaviors in polymeric materials using “direct current integrated charge method”","authors":"Y. Sekiguchi, T. Takada, H. Miyake, Y. Tanaka","doi":"10.23919/ISEIM.2017.8166584","DOIUrl":"https://doi.org/10.23919/ISEIM.2017.8166584","url":null,"abstract":"The space charge accumulation in polymeric materials is one of the important behaviors of pre-ageing phenomena in electrical insulations. The Pulsed electro-acoustic (PEA) method is an appropriate method to understand the space charge behavior, but some kind of charges such as charges with high speed are hardly detected by the method. To understand the whole information of charges, that is Q(t) behaviors, we have been trying the direct current integrated charge (DCIC-Q(t)) method, which is using a measuring capacitor directly connected to a sample, and measuring from the starting point of applying voltage to the end point of grounding. The basic technologies of the method and some investigation results of generally used polymers, low- and high-density polyethylene (LDPE and HDPE), and polyethylene terephthalate (PET) are described in this article. Even concluded in same category of polyethylene, LDPE and HDPE show a different behavior, and PET which contains aromatic groups in the molecular chain shows excellent ability to control charges.","PeriodicalId":222058,"journal":{"name":"2017 International Symposium on Electrical Insulating Materials (ISEIM)","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125231009","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: 4
Reduction effect of cross-linking by-products on dielectric strength in polyethylene under DC stress 交联副产物对直流应力下聚乙烯介电强度的降低作用
2017 International Symposium on Electrical Insulating Materials (ISEIM) Pub Date : 2017-09-01 DOI: 10.23919/ISEIM.2017.8166536
T. Kanai, Toshiyuki Fujitomi, H. Miyake, Y. Tanaka
{"title":"Reduction effect of cross-linking by-products on dielectric strength in polyethylene under DC stress","authors":"T. Kanai, Toshiyuki Fujitomi, H. Miyake, Y. Tanaka","doi":"10.23919/ISEIM.2017.8166536","DOIUrl":"https://doi.org/10.23919/ISEIM.2017.8166536","url":null,"abstract":"XLPE(Cross-Linked Polyethylene) power cable is expected to be applied to a long distance power transmission cable in HVDC systems. DC transmission system is effective for the long distance power transmission, and XLPE cable is not necessary to give a periodical maintenance procedure. However, when DC high voltage is applied to XLPE, it is said that on electrical breakdown may occur due to an effect of space charge accumulation. While the relationship between them in LDPE(Low density polyethylene) was revealed, it has not been clear in XLPE yet. In the case of XLPE, not only the space charge behavior, the conduction current seemed to be also important factor to understand the relationship. In this paper, the space charge distribution and an external circuit current measurement were carried out for the materials, which were immersed in the by-products. It was found that the reduction of breakdown strength and a rapid change of the conduction current in the case of LDPE were observed, and them were much obvious in LDPE immersed in cumylalcohol than those observed in LDPE immersed in acetophenone.","PeriodicalId":222058,"journal":{"name":"2017 International Symposium on Electrical Insulating Materials (ISEIM)","volume":"1999 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121075338","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
Effects of tracking and erosion resistance of nano-boehmite added silicone rubber 添加硅橡胶的纳米薄水铝石的跟踪性能和耐侵蚀性能
2017 International Symposium on Electrical Insulating Materials (ISEIM) Pub Date : 2017-09-01 DOI: 10.23919/ISEIM.2017.8088682
R. Inoue, T. Kondo, M. Kozako, M. Hikita
{"title":"Effects of tracking and erosion resistance of nano-boehmite added silicone rubber","authors":"R. Inoue, T. Kondo, M. Kozako, M. Hikita","doi":"10.23919/ISEIM.2017.8088682","DOIUrl":"https://doi.org/10.23919/ISEIM.2017.8088682","url":null,"abstract":"The aim of this study is to develop new room temperature vulcanization (RTV) silicone rubber nanocomposites for application to outdoor polymer insulator. This paper deals with effects of addition of nano-scale boehmite filler on tracking, erosion resistance and arcing resistance of silicone rubber. The inclined plane test and the arc resistance test were performed. As a result, it was elucidated that the addition of small amount of nano-boehmite filler is able to increase tracking, erosion and arcing resistance.","PeriodicalId":222058,"journal":{"name":"2017 International Symposium on Electrical Insulating Materials (ISEIM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127193732","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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