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9th International Symposium on Electrets (ISE 9) Proceedings最新文献

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An application of thermally stimulated current technique to molecular motion analysis of polymers 热刺激电流技术在聚合物分子运动分析中的应用
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578158
H. Shimizu, T. Kitano, K. Nakayama
{"title":"An application of thermally stimulated current technique to molecular motion analysis of polymers","authors":"H. Shimizu, T. Kitano, K. Nakayama","doi":"10.1109/ISE.1996.578158","DOIUrl":"https://doi.org/10.1109/ISE.1996.578158","url":null,"abstract":"The glass transition of a liquid crystalline copolyester of p-hydroxybenzoic acid (HBA) and 2-hydroxy-6-naphthoic acid (ANA) was studied by the thermally stimulated depolarization current (TSDC) and the thermal sampling (TS)-TSDC methods. The poling temperature (Tp) dependence of global TSDC spectra revealed the existence of the sub-Tg relaxation which was responsible for the apparent broadening of the glass transition of this copolyester. The TS-TSDC spectra also revealed that the temperature dependence of the relaxation times in both the sub-Tg and /spl alpha/ relaxations was ruled by the same compensation temperature (Tc). The physical meaning of Tc was discussed in relation to the thermal-expansion coefficient.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131890600","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
Analysis of electrical charge transport, storage and release by metal-insulator-metal structures 金属-绝缘体-金属结构中电荷传输、储存和释放的分析
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578042
E. Neagu, R. Neagu, J. Marat-Mendes
{"title":"Analysis of electrical charge transport, storage and release by metal-insulator-metal structures","authors":"E. Neagu, R. Neagu, J. Marat-Mendes","doi":"10.1109/ISE.1996.578042","DOIUrl":"https://doi.org/10.1109/ISE.1996.578042","url":null,"abstract":"Isothermal electric measurements on 6 /spl mu/m PET samples using step voltage, triangular symmetric voltage of very high period and constant current as well as nonisothermal and thermally stimulated depolarisation current measurements have been carried out. A model is proposed for the electric charge transport, storage and release by M-I-M structures. On the basis of the proposed model one can explain: the ohmic behaviour of M-I contact, the strong resemblance of polarisation current and space charge current in thermally stimulated polarisation and depolarisation current measurements, the coexistence of dipolar charge and self trapped charge in polarised sample, and the bulk limitation of the charge transport process.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114322241","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
Influence of texturing conditions for copolymer films of vinylidenefluoride/tetrafluoroethylene on remnant polarization and strain-induced structural transformations 聚偏氟乙烯/四氟乙烯共聚物薄膜织构条件对残余极化和应变诱导结构转变的影响
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578240
V. Kochervinskii
{"title":"Influence of texturing conditions for copolymer films of vinylidenefluoride/tetrafluoroethylene on remnant polarization and strain-induced structural transformations","authors":"V. Kochervinskii","doi":"10.1109/ISE.1996.578240","DOIUrl":"https://doi.org/10.1109/ISE.1996.578240","url":null,"abstract":"In ferroelectric films of vinylidenefluoride with 6 mol. % tetrafluoroethylene copolymers values remnant P/sub r/ and maximum P/sub s/ polarization depends on temperature of uniaxial drawing T/sub d/. Films with lower T/sub d/ have high magnitudes of P/sub r/ and P/sub s/. Data of IR spectroscopy, small-angle X-ray diffraction SAXS and ultrasonic relaxation show that the drawing realized at lower temperatures leads to higher concentrations of conformations of planar zigzag and increases their degree of orientation. Approaching to \"ideal monocrystall\" texture is a necessary condition to obtain high ferroelectric and piezoelectric characteristics in such systems.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116040023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The dielectric behaviour of PbO-Bi/sub 2/O/sub 3/ electret system at infralow frequencies PbO-Bi/sub - 2/ sub - 3/ sub - 3驻极体体系在次低频下的介电性能
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578110
V. Avanesyan, G. Bordovskiĭ, S. Potachov
{"title":"The dielectric behaviour of PbO-Bi/sub 2/O/sub 3/ electret system at infralow frequencies","authors":"V. Avanesyan, G. Bordovskiĭ, S. Potachov","doi":"10.1109/ISE.1996.578110","DOIUrl":"https://doi.org/10.1109/ISE.1996.578110","url":null,"abstract":"The relation between depolarization currents dependences and a.c. dielectric properties of metal/Pb/sub 2/Bi/sub 6/O/sub 11//metal structures is considered by using a computer method. An empirical formula is proposed for analysis of the discharge process. Measurements indicate the existence of a non-Debye relaxation mechanism. The phenomenological theory of transient currents derived from the dark-depolarization experiments is reported. The dielectric information obtained includes the distribution of relaxation times for polycrystalline Pb/sub 2/Bi/sub 6/O/sub 11/.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123071332","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
Preparation and characterization of PBNN multilayer piezoelectric actuator PBNN多层压电驱动器的制备与表征
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578259
D. R. Ciien, M. Zhu, W. Zhang, L. G.R.
{"title":"Preparation and characterization of PBNN multilayer piezoelectric actuator","authors":"D. R. Ciien, M. Zhu, W. Zhang, L. G.R.","doi":"10.1109/ISE.1996.578259","DOIUrl":"https://doi.org/10.1109/ISE.1996.578259","url":null,"abstract":"The preparation and characterization of multilayer actuators with fifty layers (100 /spl mu/m in thickness) of piezoelectric [(Pb/sub (1-x/)Ba/sub x/)/sub 6-y/(NaLi)/sub y/Nb/sub 10/O/sub 30/] (PBNN) were reported, which were prepared by tape-casting and cofired with internal Pd30+Ag70 electrodes. The PBNN wafers prepared by the tape-casting technique were compared with those prepared by conventional dry-pressure techniques. Delaminations occurring in the layers of some actuators were observed and discussed. The obtained high linearity and low hysteresis in the displacement-applied field, the symmetric displacement under positive and negative applied field, were discussed in relation to the crystal and domain structure.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124899911","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 storage in Teflon AF films 聚四氟乙烯AF薄膜中的电荷存储
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578044
Tingji Lu
{"title":"Charge storage in Teflon AF films","authors":"Tingji Lu","doi":"10.1109/ISE.1996.578044","DOIUrl":"https://doi.org/10.1109/ISE.1996.578044","url":null,"abstract":"The behavior of charge storage in corona charged and electron-beam irradiated Teflon AF films is investigated. Teflon AF film of 2 to 4 /spl mu/m thickness were prepared on glass substrates with Al and graphite electrodes by spin coating. Details of the experimental results are reported and discussed. For example, the measuring result of the laser-induced pressure pulse method shows that the velocity of the pressure pulse is 1.4 km/s. The maximum surface density depends mostly on the dielectric strength of the film, and the maximum potential of the free surface on the sample is directly proportional to the film thickness. The application of heat before, during or after charging can effectively improve the charge stability.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123670553","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
Thermal stability of polarization in P(VDF-TFE) copolymer films P(VDF-TFE)共聚物薄膜极化的热稳定性
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578224
B. Kussner, G. Eberle, W. Eisenmenger, S. Fedosov
{"title":"Thermal stability of polarization in P(VDF-TFE) copolymer films","authors":"B. Kussner, G. Eberle, W. Eisenmenger, S. Fedosov","doi":"10.1109/ISE.1996.578224","DOIUrl":"https://doi.org/10.1109/ISE.1996.578224","url":null,"abstract":"Summary form only given. PVDF and P(VDF-TrFE) copolymer have been extensively studied recently, while much less is known about properties of P(VDF-TFE) copolymer. The purpose of this work was to study the role played by the trapped charge in thermal stability of the residual polarization in P(VDF-TFE) films and to find the energy of the charge de-trapping. To accomplish this, polarization profiles in the films poled either with or without a thermal stimulation were measured at different temperatures by the piezoelectrically induced pressure step (PPS) method. The activation energy was calculated from the experimental data and compared with those already known for PVDF and P(VDF-TrFE) copolymer.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121540498","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
Thermal-pulse investigation of thermally grown silicon dioxide electrets 热生长二氧化硅驻极体的热脉冲研究
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578079
H. Amjadi
{"title":"Thermal-pulse investigation of thermally grown silicon dioxide electrets","authors":"H. Amjadi","doi":"10.1109/ISE.1996.578079","DOIUrl":"https://doi.org/10.1109/ISE.1996.578079","url":null,"abstract":"The thermal-pulse method has been applied to samples of thermally grown silicon dioxide on silicon wafers. During this nondestructive experiment the surface of the electret sample has been excited by means of a sub-nanosecond laser pulse. The electrical potential across the electret layer changes due to the diffusion of thermal energy through the sample and due to the internal electrical field. The investigated samples were charged by a corona method. The charge centroid was estimated by a modified CV-method which will be described briefly. In the next step the samples were excited by means of a short laser pulse. Since the charge centroid for corona charged samples is close to the irradiated surface, the field distribution in the bulk SiO/sub 2/ is nearly homogeneous. Therefore parameters like the thermal diffusivity can be derived from the observed thermal-pulse response. Knowing the thermal properties of the layers, an approximation to the field distribution and thus the charge profile in the same electret layers was gained from the experimental data.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125146269","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
Filamentary surface charging phenomena observed by dynamic surface charge distribution measurement 动态表面电荷分布测量所观察到的丝状表面电荷现象
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578078
Yongchang Zhu, T. Takada, D. Tu
{"title":"Filamentary surface charging phenomena observed by dynamic surface charge distribution measurement","authors":"Yongchang Zhu, T. Takada, D. Tu","doi":"10.1109/ISE.1996.578078","DOIUrl":"https://doi.org/10.1109/ISE.1996.578078","url":null,"abstract":"A newly developed, electro-optical Pockels effect technique, which allows the dynamic measurement of surface charge distribution, is employed to investigate surface discharge phenomena. Positive surface discharges exhibit a filamentary structure in the resultant surface charge distribution. The effects of electronic and ionic negative surface charges and the effect of electric field directions on positive surface discharge development are investigated.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129922901","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 random-walk model of non-linear structural dynamics in supercooled liquids 过冷液体非线性结构动力学的随机游走模型
9th International Symposium on Electrets (ISE 9) Proceedings Pub Date : 1996-09-25 DOI: 10.1109/ISE.1996.578055
V. Arkhipov, H. Bāssler, D. Khramtchenkov
{"title":"A random-walk model of non-linear structural dynamics in supercooled liquids","authors":"V. Arkhipov, H. Bāssler, D. Khramtchenkov","doi":"10.1109/ISE.1996.578055","DOIUrl":"https://doi.org/10.1109/ISE.1996.578055","url":null,"abstract":"The random-walk model of structural dynamics is used to account for long-range cooperative phenomena in supercooled liquids. Coupling of structural units within ordered regions is shown to cause narrowing of the distribution function for the energies of structural units. This approach allows one to explain the Kauzmann paradox and to fit non-Debye susceptibility spectra obtained on so-called fragile glasses. The results are in quantitative agreement with existing experimental data.","PeriodicalId":425004,"journal":{"name":"9th International Symposium on Electrets (ISE 9) Proceedings","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128026076","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
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