Pub Date : 2016-07-03DOI: 10.1109/ICD.2016.7547823
G. Meng, Yonghong Cheng, C. Dong, Lei Chen, Bowen Zhu, C. Men
The micro/nano devices have been widely used for the past decades. However, as one of the major factors to restrict the performance of the devices, the insulation failure mechanism at nanoscale is still unclear. Basically, the insulation performance in vacuum is related to the electrode geometry, electrode materials, gap size and applied voltage, etc. To better understand the mechanism of vacuum breakdown at nanoscale, the present work focuses on the effect of electrode geometry on nanoscale breakdown in vacuum. The effect of the electrode geometry would be investigated experimentally and the mechanism would also be discussed in the paper.
{"title":"Effect of electrode geometry on the vacuum breakdown behaviors at nanoscale","authors":"G. Meng, Yonghong Cheng, C. Dong, Lei Chen, Bowen Zhu, C. Men","doi":"10.1109/ICD.2016.7547823","DOIUrl":"https://doi.org/10.1109/ICD.2016.7547823","url":null,"abstract":"The micro/nano devices have been widely used for the past decades. However, as one of the major factors to restrict the performance of the devices, the insulation failure mechanism at nanoscale is still unclear. Basically, the insulation performance in vacuum is related to the electrode geometry, electrode materials, gap size and applied voltage, etc. To better understand the mechanism of vacuum breakdown at nanoscale, the present work focuses on the effect of electrode geometry on nanoscale breakdown in vacuum. The effect of the electrode geometry would be investigated experimentally and the mechanism would also be discussed in the paper.","PeriodicalId":306397,"journal":{"name":"2016 IEEE International Conference on Dielectrics (ICD)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128994471","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 : 2016-07-03DOI: 10.1109/ICD.2016.7547624
K. Liland, C. Lesaint, L. Lundgaard, M. Hernes, W. Glomm
To facilitate operation of power electronics for subsea operation at ambient pressure components have to be submerged in a liquid. Equipment and schemes for testing of long term properties have been developed. Several techniques were used to investigate compatibility between a silicone gel and various insulation fluids. Equipment for electric endurance testing of power electronic components at dc stress under controlled temperature and humidity was developed. Performance of high voltage diodes covered with various insulation liquids, coatings and gel covering were studied.
{"title":"Liquid insulation of IGBT modules: Long term chemical compatibility and high voltage endurance testing","authors":"K. Liland, C. Lesaint, L. Lundgaard, M. Hernes, W. Glomm","doi":"10.1109/ICD.2016.7547624","DOIUrl":"https://doi.org/10.1109/ICD.2016.7547624","url":null,"abstract":"To facilitate operation of power electronics for subsea operation at ambient pressure components have to be submerged in a liquid. Equipment and schemes for testing of long term properties have been developed. Several techniques were used to investigate compatibility between a silicone gel and various insulation fluids. Equipment for electric endurance testing of power electronic components at dc stress under controlled temperature and humidity was developed. Performance of high voltage diodes covered with various insulation liquids, coatings and gel covering were studied.","PeriodicalId":306397,"journal":{"name":"2016 IEEE International Conference on Dielectrics (ICD)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126848442","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 : 2016-07-03DOI: 10.1109/ICD.2016.7547803
Y. Gao, J. Wang, F. Liu, B. Du, Y. Man, Y. Dong, L. Yang
Surface potential decay on electron beam irradiated epoxy based nanocomposites has been investigated in this paper. The 2 mm-thick laminate composites sample was irradiated with the electron beam at an average energy of 7.5 MeV, and the total accumulated dose was up to 500 kGy. After the irradiation, the nanocomposites were corona charged with DC voltage at 10 kV through a pair of needle to plate electrode. Surface potential of the sample was then measured by means of an electrostatic voltmeter and the trap distribution, carrier mobility could be estimated. Results obtained indicated that the presence of nano-filler in the nanocomposites played an important role in varying the charge transportation behavior both before and after the irradiation. It is proposed that the radiation induced variation in chemical and physical structures of the nanocomposites is responsible for the accumulated dose dependent charge transportation manner.
{"title":"Surface potential decay of epoxy/Al2O3 nanocomposites irradiated with high energy electron beam","authors":"Y. Gao, J. Wang, F. Liu, B. Du, Y. Man, Y. Dong, L. Yang","doi":"10.1109/ICD.2016.7547803","DOIUrl":"https://doi.org/10.1109/ICD.2016.7547803","url":null,"abstract":"Surface potential decay on electron beam irradiated epoxy based nanocomposites has been investigated in this paper. The 2 mm-thick laminate composites sample was irradiated with the electron beam at an average energy of 7.5 MeV, and the total accumulated dose was up to 500 kGy. After the irradiation, the nanocomposites were corona charged with DC voltage at 10 kV through a pair of needle to plate electrode. Surface potential of the sample was then measured by means of an electrostatic voltmeter and the trap distribution, carrier mobility could be estimated. Results obtained indicated that the presence of nano-filler in the nanocomposites played an important role in varying the charge transportation behavior both before and after the irradiation. It is proposed that the radiation induced variation in chemical and physical structures of the nanocomposites is responsible for the accumulated dose dependent charge transportation manner.","PeriodicalId":306397,"journal":{"name":"2016 IEEE International Conference on Dielectrics (ICD)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123904355","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 : 2016-07-03DOI: 10.1109/ICD.2016.7547814
Christoph Felix Niedik, Claudius Freye, F. Jenau, D. Haring, Gero Schroder, Jurgen Bittmann
Extruded cable systems and accessories are key components within the area of power transmission systems. Taking into account that the number of high voltage direct current (HVDC) transmission solutions is continuously increasing the role of its components and insulating materials becomes more and more important. In addition to transient and alternating current (AC) field stress the more important material characteristic for designing electrical equipment under DC stress is DC conductivity. For this reason, the purpose of this paper is to investigate the material characteristics of silicone-based insulation materials used in cable accessories in terms of temperature- and field-dependent conductivity. Although silicone rubber is a common application in cable accessories the knowledge about dc conductivity can be increased. Thin layers of LSR as representatives for insulation materials of cable joints are prepared. The variation of field strengths and temperatures are kept with regard to operating conditions. The electrical characterization is done based on ASTM D257-14 using guard ring electrodes. A variation of electrical contacting is carried out in compliance with this standard.
{"title":"Investigation on the electrical characterization of silicone rubber using DC conductivity measurement","authors":"Christoph Felix Niedik, Claudius Freye, F. Jenau, D. Haring, Gero Schroder, Jurgen Bittmann","doi":"10.1109/ICD.2016.7547814","DOIUrl":"https://doi.org/10.1109/ICD.2016.7547814","url":null,"abstract":"Extruded cable systems and accessories are key components within the area of power transmission systems. Taking into account that the number of high voltage direct current (HVDC) transmission solutions is continuously increasing the role of its components and insulating materials becomes more and more important. In addition to transient and alternating current (AC) field stress the more important material characteristic for designing electrical equipment under DC stress is DC conductivity. For this reason, the purpose of this paper is to investigate the material characteristics of silicone-based insulation materials used in cable accessories in terms of temperature- and field-dependent conductivity. Although silicone rubber is a common application in cable accessories the knowledge about dc conductivity can be increased. Thin layers of LSR as representatives for insulation materials of cable joints are prepared. The variation of field strengths and temperatures are kept with regard to operating conditions. The electrical characterization is done based on ASTM D257-14 using guard ring electrodes. A variation of electrical contacting is carried out in compliance with this standard.","PeriodicalId":306397,"journal":{"name":"2016 IEEE International Conference on Dielectrics (ICD)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114194221","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 : 2016-07-03DOI: 10.1109/ICD.2016.7547771
T. Tomášková, Alexey Shlykevich, J. Hornak, P. Trnka, M. Gutten
The electrical-insulation systems (EIS) of the electrical rotating machines have excellent electrical insulating and mechanical properties, but have a relatively low value of thermal conductivity. This work describes how micro fillers of aluminum oxide (Al2O3) can affect the thermal properties. Thermal conditions in the electrical rotating machine were modeled by finite element method 2D SW FEMM. The samples were measured for tan δ depending on the frequency and on temperature. Furthermore, the samples were measured for absorption and resorption currents, volume resistivity and dielectric strength. The sample was made with the use of an epoxy resin with the addition of micro fillers of Al2O3 (2%, 4%, 6%, 8% and 10%).
{"title":"The high voltage electrical insulation systems with higher thermal conductivity","authors":"T. Tomášková, Alexey Shlykevich, J. Hornak, P. Trnka, M. Gutten","doi":"10.1109/ICD.2016.7547771","DOIUrl":"https://doi.org/10.1109/ICD.2016.7547771","url":null,"abstract":"The electrical-insulation systems (EIS) of the electrical rotating machines have excellent electrical insulating and mechanical properties, but have a relatively low value of thermal conductivity. This work describes how micro fillers of aluminum oxide (Al2O3) can affect the thermal properties. Thermal conditions in the electrical rotating machine were modeled by finite element method 2D SW FEMM. The samples were measured for tan δ depending on the frequency and on temperature. Furthermore, the samples were measured for absorption and resorption currents, volume resistivity and dielectric strength. The sample was made with the use of an epoxy resin with the addition of micro fillers of Al2O3 (2%, 4%, 6%, 8% and 10%).","PeriodicalId":306397,"journal":{"name":"2016 IEEE International Conference on Dielectrics (ICD)","volume":"220 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124369923","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 : 2016-07-03DOI: 10.1109/ICD.2016.7547610
P. Huang, B. Du, Ang Li, Y. Xing, J. Li, Q. Tang, R. L. Wang, Z. Yin, H. M. Wang
Polypropylene (PP), with low loss and high dielectric strength, is widely used as dielectric for the metallized film capacitor (MFC). The electric aging and dielectric breakdown of the dielectrics under high voltage stress is a major concern in the research on polymer materials. Surface discharge and flashover may happen on the PP film between the metallized segments in MFCs, which can lead to the breakdown of insulation. The effects of direct fluorination on the surface charge and flashover characteristics of PP films under pulse voltage are experimented in this paper. The experimental results indicated that the surface charge and flashover voltage were strongly correlated with the charge polarity, pulse frequency and fluorination time. It was suggested that the fluorination of certain time could significantly improve the decay rate of the surface charge as well as the surface flashover voltage of PP samples.
{"title":"Effects of fluorination on surface charge behavior of polypropylene films under pulse voltage","authors":"P. Huang, B. Du, Ang Li, Y. Xing, J. Li, Q. Tang, R. L. Wang, Z. Yin, H. M. Wang","doi":"10.1109/ICD.2016.7547610","DOIUrl":"https://doi.org/10.1109/ICD.2016.7547610","url":null,"abstract":"Polypropylene (PP), with low loss and high dielectric strength, is widely used as dielectric for the metallized film capacitor (MFC). The electric aging and dielectric breakdown of the dielectrics under high voltage stress is a major concern in the research on polymer materials. Surface discharge and flashover may happen on the PP film between the metallized segments in MFCs, which can lead to the breakdown of insulation. The effects of direct fluorination on the surface charge and flashover characteristics of PP films under pulse voltage are experimented in this paper. The experimental results indicated that the surface charge and flashover voltage were strongly correlated with the charge polarity, pulse frequency and fluorination time. It was suggested that the fluorination of certain time could significantly improve the decay rate of the surface charge as well as the surface flashover voltage of PP samples.","PeriodicalId":306397,"journal":{"name":"2016 IEEE International Conference on Dielectrics (ICD)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125841617","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 : 2016-07-03DOI: 10.1109/ICD.2016.7547567
T. Iwata, T. Momose, H. Miyake, Y. Tanaka
In the automotive industry, a reduction in CO2 and low fuel consumption is required from the view of environment. According to such demand, electric vehicle using an inverter fed motor is developed and diffused. However, partial discharge is generated between motor winding, when the higher voltage is applied to the winding. Thereby, it may induce a fatal breakdown in the cover insulating. Judging from a published report, it is said that a decrease of partial discharge inception voltage are concerned by space charge accumulation in the insulating layer. However, only few studies about the space charge accumulation characteristic in the insulating layer of the windings has been carried out in the past. In this study, we especially focused on the space charge accumulations in polyamide-imide (PAI) under square wave voltage using Pulsed Electro-Acoustic (PEA) method. It is found that, a negative hetero charge accumulated near the anode immediately after DC voltage application. Moreover, even in the short circuit condition, negative charge remained near the anode. It means that the space charge accumulates in the bulk of PAI film within a short time of the DC voltage application. Therefore, even in the inverter drive system, excessive voltage application may affect the performance of the dielectric material. Therefore, in this study, we investigated the effect of the square wave voltage application to the film on the space charge accumulation.
{"title":"Measurement of space charge distribution in coating material for motor wingings under square wave voltage","authors":"T. Iwata, T. Momose, H. Miyake, Y. Tanaka","doi":"10.1109/ICD.2016.7547567","DOIUrl":"https://doi.org/10.1109/ICD.2016.7547567","url":null,"abstract":"In the automotive industry, a reduction in CO2 and low fuel consumption is required from the view of environment. According to such demand, electric vehicle using an inverter fed motor is developed and diffused. However, partial discharge is generated between motor winding, when the higher voltage is applied to the winding. Thereby, it may induce a fatal breakdown in the cover insulating. Judging from a published report, it is said that a decrease of partial discharge inception voltage are concerned by space charge accumulation in the insulating layer. However, only few studies about the space charge accumulation characteristic in the insulating layer of the windings has been carried out in the past. In this study, we especially focused on the space charge accumulations in polyamide-imide (PAI) under square wave voltage using Pulsed Electro-Acoustic (PEA) method. It is found that, a negative hetero charge accumulated near the anode immediately after DC voltage application. Moreover, even in the short circuit condition, negative charge remained near the anode. It means that the space charge accumulates in the bulk of PAI film within a short time of the DC voltage application. Therefore, even in the inverter drive system, excessive voltage application may affect the performance of the dielectric material. Therefore, in this study, we investigated the effect of the square wave voltage application to the film on the space charge accumulation.","PeriodicalId":306397,"journal":{"name":"2016 IEEE International Conference on Dielectrics (ICD)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130054855","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 : 2016-07-03DOI: 10.1109/ICD.2016.7547512
N. Freebody, G. Stevens, H. Herman, A. Vaughan
With balanced consideration of the polymer matrix chemistry, nanofiller type, loading and surface chemical treatment, the application of multi-variate statistical analysis (MVSA) modeling was carried out to inform structure property relationships in support of material design and optimization. Fourier transform infrared spectra and physical property measurements, including thermal and electrical properties, were performed on a number of unfilled and nanosilica-filled epoxy systems. MVSA models were constructed and the ability of molecular spectroscopy to measure the target properties demonstrated. The models produced a consistent picture of chemical group correlations with electrical properties such as space charge accumulation and electrical breakdown strength, which are consistent with recent molecular dynamics calculations of the effect of group chemistry on charge transport and trapping in polymers. Findings also suggest that it is possible to gain insights into potential interactions between the resin and nanofiller.
{"title":"Nanodielectric structure-property relationships and design rules using chemometric methods","authors":"N. Freebody, G. Stevens, H. Herman, A. Vaughan","doi":"10.1109/ICD.2016.7547512","DOIUrl":"https://doi.org/10.1109/ICD.2016.7547512","url":null,"abstract":"With balanced consideration of the polymer matrix chemistry, nanofiller type, loading and surface chemical treatment, the application of multi-variate statistical analysis (MVSA) modeling was carried out to inform structure property relationships in support of material design and optimization. Fourier transform infrared spectra and physical property measurements, including thermal and electrical properties, were performed on a number of unfilled and nanosilica-filled epoxy systems. MVSA models were constructed and the ability of molecular spectroscopy to measure the target properties demonstrated. The models produced a consistent picture of chemical group correlations with electrical properties such as space charge accumulation and electrical breakdown strength, which are consistent with recent molecular dynamics calculations of the effect of group chemistry on charge transport and trapping in polymers. Findings also suggest that it is possible to gain insights into potential interactions between the resin and nanofiller.","PeriodicalId":306397,"journal":{"name":"2016 IEEE International Conference on Dielectrics (ICD)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133870286","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 : 2016-07-03DOI: 10.1109/ICD.2016.7547550
A. Cavallini, F. Negri
A recent investigation on the DC stability of nanofluids has revealed some interesting phenomena regarding the polarization current; some unexpected slow peaks appeared after the voltage reached a precise value. In this work we have deepened and analyzed the possible mechanisms which could cause such experimental results. While in low concentration nanofluids a charge trapping mechanism seems to be the prevailing one, at higher concentration, the reduced nanoparticles distances and the lower energy barrier between two consecutive nanoparticles is able to activate the tunneling charge transfer among them, thus increasing their apparent mobility.
{"title":"Behavior of nanofluids under DC divergent fields","authors":"A. Cavallini, F. Negri","doi":"10.1109/ICD.2016.7547550","DOIUrl":"https://doi.org/10.1109/ICD.2016.7547550","url":null,"abstract":"A recent investigation on the DC stability of nanofluids has revealed some interesting phenomena regarding the polarization current; some unexpected slow peaks appeared after the voltage reached a precise value. In this work we have deepened and analyzed the possible mechanisms which could cause such experimental results. While in low concentration nanofluids a charge trapping mechanism seems to be the prevailing one, at higher concentration, the reduced nanoparticles distances and the lower energy barrier between two consecutive nanoparticles is able to activate the tunneling charge transfer among them, thus increasing their apparent mobility.","PeriodicalId":306397,"journal":{"name":"2016 IEEE International Conference on Dielectrics (ICD)","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133985829","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 : 2016-07-03DOI: 10.1109/ICD.2016.7547609
C. Vanga-Bouanga, M. Frechette, É. David
In this report, the composites are based on epoxy resin and PAni which was synthesized in-situ by chemical oxidative polymerisation of aniline with ammonium peroxydisulfate as oxidant in hydrochloric acid medium. The bulk polymer composites were made from a powder consisting of the epoxy micro-particles surrounded by the PAni (core-shell structure) with different percentage 1, 5 and 10 wt% of aniline-HCl. The AC electrical conductivity of these composites measured at room temperature showed that the presence of PAni in the epoxy matrix leads to an increase of its conductivity. By displaying the variation of conductivity as a function of the aniline-HCl content in the epoxy matrix at around 50 Hz, it was seen that the electrical conductivity increases with the percentage of aniline starting from as low as 1 wt%. The value of the AC conductivity at 50 Hz varies from 10-13 S/cm for pure epoxy to 10-10 S/cm for the composite with 1 wt% of aniline-HCl. FTIR analysis did not show any significant changes in the absorption peaks of composite epoxy-PAni. TGA analysis showed that sample with PAni starts to degrade at a lower temperature.
{"title":"Electrical properties of polyaniline-based epoxy microcomposite","authors":"C. Vanga-Bouanga, M. Frechette, É. David","doi":"10.1109/ICD.2016.7547609","DOIUrl":"https://doi.org/10.1109/ICD.2016.7547609","url":null,"abstract":"In this report, the composites are based on epoxy resin and PAni which was synthesized in-situ by chemical oxidative polymerisation of aniline with ammonium peroxydisulfate as oxidant in hydrochloric acid medium. The bulk polymer composites were made from a powder consisting of the epoxy micro-particles surrounded by the PAni (core-shell structure) with different percentage 1, 5 and 10 wt% of aniline-HCl. The AC electrical conductivity of these composites measured at room temperature showed that the presence of PAni in the epoxy matrix leads to an increase of its conductivity. By displaying the variation of conductivity as a function of the aniline-HCl content in the epoxy matrix at around 50 Hz, it was seen that the electrical conductivity increases with the percentage of aniline starting from as low as 1 wt%. The value of the AC conductivity at 50 Hz varies from 10-13 S/cm for pure epoxy to 10-10 S/cm for the composite with 1 wt% of aniline-HCl. FTIR analysis did not show any significant changes in the absorption peaks of composite epoxy-PAni. TGA analysis showed that sample with PAni starts to degrade at a lower temperature.","PeriodicalId":306397,"journal":{"name":"2016 IEEE International Conference on Dielectrics (ICD)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132620450","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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