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1985 5th International Symposium on Electrets (ISE 5)最新文献

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Applications of polyvinylidene fluoride films 聚偏氟乙烯薄膜的应用
1985 5th International Symposium on Electrets (ISE 5) Pub Date : 1985-09-01 DOI: 10.1109/ISE.1985.7341564
M. Marcus
{"title":"Applications of polyvinylidene fluoride films","authors":"M. Marcus","doi":"10.1109/ISE.1985.7341564","DOIUrl":"https://doi.org/10.1109/ISE.1985.7341564","url":null,"abstract":"Polyvinylidene fluoride (PVF2) is a ferroelectric polymer which can be used in a variety of piezoelectric and pyroelectric transducers. Application classes for PVF2 are reviewed, and figures of merit are given along with comparisons to other materials. It is shown that thickness, orientation and polarization anisotropy of PVF2 transducer films should be different for use in diverse applications. Design criteria are presented for a variety of applications including flexure mode transducers and pyroelectric detectors based on PVF2. A review is given of the commercialized applications or PVF2.","PeriodicalId":6451,"journal":{"name":"1985 5th International Symposium on Electrets (ISE 5)","volume":"33 1","pages":"724-731"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81770510","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
Studies on charging op polymer foils by triboelectricity 摩擦电对聚合物薄膜充电的研究
1985 5th International Symposium on Electrets (ISE 5) Pub Date : 1985-09-01 DOI: 10.1109/ISE.1985.7341522
Sun Xi-ming, Shi Ling-sheng
{"title":"Studies on charging op polymer foils by triboelectricity","authors":"Sun Xi-ming, Shi Ling-sheng","doi":"10.1109/ISE.1985.7341522","DOIUrl":"https://doi.org/10.1109/ISE.1985.7341522","url":null,"abstract":"Triboelectricity, which is a kind of old and well known phenomena, has been used as a method of charging of polymer electrets(1). G.M. Sessler has shown that this method has not been used extensively, mostly because of lack of accurate reproducibility(2) R. Gerhard-Multhaupt mentioned in his recent paper that triboelectricity will probably be used as a simple and safe charging method(3). We used \"The Arrangement of Triboelectrometer and Auto-measuring Recorder\" which was assembled by us to charge polymer such as LDPE, PS and teflon PEP foils. In this paper we discuss effects of some factors such as fimes of friction (n), normal pressure (p), frictional separate velocity (v) and relative humidity (RH) at RT. The results of our experiments have shown that charging electret by using suitable frictional materials is controllable, reproduceable and relatively uniform.","PeriodicalId":6451,"journal":{"name":"1985 5th International Symposium on Electrets (ISE 5)","volume":"110 1","pages":"456-462"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76208031","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
I.V.V. Dipoles in LiF:Ti 生活中的偶极子:Ti
1985 5th International Symposium on Electrets (ISE 5) Pub Date : 1985-09-01 DOI: 10.1109/ISE.1985.7341496
R. Capelletti, M. G. Bridelli, M. Friggeri, G. Ruani, R. Foldvari, L. Kovács, A. Watterich
{"title":"I.V.V. Dipoles in LiF:Ti","authors":"R. Capelletti, M. G. Bridelli, M. Friggeri, G. Ruani, R. Foldvari, L. Kovács, A. Watterich","doi":"10.1109/ISE.1985.7341496","DOIUrl":"https://doi.org/10.1109/ISE.1985.7341496","url":null,"abstract":"ITC technique is exploited to search dipolar defects, induced in LiF by Ti, whose valence state is not well known. ITC spectra (78–350 K) exhibit at least one peak at 235 K: 1) its amplitude increases with nominal Ti-concentration and annealing temperature; 2) its shape does not depend on thermal treatment nor on Ti-concentration nor on the dopant type (TİO2 or Li2TiF6);3) it is not a single peak; 4) it is very weak in air grown crystals. Critical analysis of ITC data compared with optical and EPR spectra suggest that Ti3+ compensated by two cation vacancies is responsible for 235 K peak.","PeriodicalId":6451,"journal":{"name":"1985 5th International Symposium on Electrets (ISE 5)","volume":"42 1","pages":"294-298"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87882416","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
Comparative thermally stimulated creep and depolarization currents study in PVC PVC中热激蠕变和去极化电流的比较研究
1985 5th International Symposium on Electrets (ISE 5) Pub Date : 1985-09-01 DOI: 10.1109/ISE.1985.7341476
J. J. del Val, Á. Alegría, J. Colmenero, C. Lacabanne
{"title":"Comparative thermally stimulated creep and depolarization currents study in PVC","authors":"J. J. del Val, Á. Alegría, J. Colmenero, C. Lacabanne","doi":"10.1109/ISE.1985.7341476","DOIUrl":"https://doi.org/10.1109/ISE.1985.7341476","url":null,"abstract":"Thermally Stimulated Creep and Depolarization Current measurements have been carried out on pure PVC. Results from β relaxation point out the same origin for mechanical and dielectric spectra and a compensation laws analysis leads to two different relaxation times distributions. Kinetic studies performed by the two techniques in the glass transition region denote a high degree of cooperativity of the involved molecular motions. Depolarization spectrum shows a high temperature peak, not formed in the mechanical one, whose evolution with the poling field allows to assign it to a non-dipolar process associated to the movement of free charge carriers.","PeriodicalId":6451,"journal":{"name":"1985 5th International Symposium on Electrets (ISE 5)","volume":"124 1","pages":"175-180"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87976765","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
Polarity reversal current transient investigations in cellulose acetate films 醋酸纤维素薄膜极性反转电流瞬态研究
1985 5th International Symposium on Electrets (ISE 5) Pub Date : 1985-09-01 DOI: 10.1109/ISE.1985.7341509
R. Nath, Ashok Kumar
{"title":"Polarity reversal current transient investigations in cellulose acetate films","authors":"R. Nath, Ashok Kumar","doi":"10.1109/ISE.1985.7341509","DOIUrl":"https://doi.org/10.1109/ISE.1985.7341509","url":null,"abstract":"Polarity reversal transient currents in cellulose acetate films have been studied as a function of field, thickness and temperature. The current peaks have been observed in the current-time characteristics and these peaks may be attributed to the space charge injection from electrodes. The dependence of the transient current on thickness (I α d<sup>−3</sup>)of the sample justifies the existence of SCLC. The carrier mobility ∼(8.5 ± 0.05) × 10<sup>−10</sup> cm<inf>2</inf> V<sup>−1</sup> s<sup>−1</sup> has been estimated at room temperature. The mobility in iodine doped (2 /. wt/wt) sample has been found to be ∼ 9.5×10<sup>−8</sup> cm<sup>2</sup> V<sup>−1</sup> s<sup>−1</sup>. The sign of the injected carriers is determined by using blocking electrode method.","PeriodicalId":6451,"journal":{"name":"1985 5th International Symposium on Electrets (ISE 5)","volume":"72 4","pages":"370-375"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91462666","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 dynamics of an electret inside a medium and at the interface of two media subjected to γ-rays from a Co60 source 在Co60源γ射线作用下介质内和两介质界面处驻极体的电荷动力学
1985 5th International Symposium on Electrets (ISE 5) Pub Date : 1985-09-01 DOI: 10.1109/ISE.1985.7341560
P.-N. Martin, M. Bernard
{"title":"Charge dynamics of an electret inside a medium and at the interface of two media subjected to γ-rays from a Co60 source","authors":"P.-N. Martin, M. Bernard","doi":"10.1109/ISE.1985.7341560","DOIUrl":"https://doi.org/10.1109/ISE.1985.7341560","url":null,"abstract":"The recent application of electrets in the dosimetry brought them some more interest. In order to find for them the application in radio-diagnostics, we did study the electret charge evolution inside and on interfaces of two media irradiated with cobalt 60 γ rays.","PeriodicalId":6451,"journal":{"name":"1985 5th International Symposium on Electrets (ISE 5)","volume":"58 1","pages":"702-707"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91392652","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
γ-Irradiation effect on TSC from polyester films γ-辐照对聚酯薄膜中TSC的影响
1985 5th International Symposium on Electrets (ISE 5) Pub Date : 1985-09-01 DOI: 10.1109/ISE.1985.7341552
Yiqin Zhou, Han-Chuan Wu, Jixiang Chang
{"title":"γ-Irradiation effect on TSC from polyester films","authors":"Yiqin Zhou, Han-Chuan Wu, Jixiang Chang","doi":"10.1109/ISE.1985.7341552","DOIUrl":"https://doi.org/10.1109/ISE.1985.7341552","url":null,"abstract":"TSC spectra of the thermo-relaxation of frozen-in dipoles and space charges from PET irradiated by 60CO have been investigated. The total dose ranged over Mrad at dose rates from 10 to 850 rad/sec. It was observed the current peaks of space charges undergo a max value with increasing of irradiation doses, and finally tend almost to a constant at various dose rates. Authors suppose two processes, namely, the excitation new carrier by ionization irradiation and annihilation electrons by oxygen diffusion, are presented, This can be used as a method for distinguishing main species of carrier in polymer-electrects.","PeriodicalId":6451,"journal":{"name":"1985 5th International Symposium on Electrets (ISE 5)","volume":"93 1","pages":"653-658"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83465752","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
Some factors affecting the location of the (above Tg) peak in thermally stimulated depolarization currents in polystyrene 影响聚苯乙烯中热激退极化电流(Tg以上)峰位置的一些因素
1985 5th International Symposium on Electrets (ISE 5) Pub Date : 1985-09-01 DOI: 10.1109/ISE.1985.7341497
E. Marchal
{"title":"Some factors affecting the location of the (above Tg) peak in thermally stimulated depolarization currents in polystyrene","authors":"E. Marchal","doi":"10.1109/ISE.1985.7341497","DOIUrl":"https://doi.org/10.1109/ISE.1985.7341497","url":null,"abstract":"For polystyrene, independent measurements of dielectric relaxation time T determined from the TSD p peak and of conductivity a show that the relation στ= ε<inf>o</inf>ε holds. Space charge p peaks are known to be hard to reproduce in TSD experiments. Factors such as electrode<sup>−</sup> sample contact, applied voltage, sample preparation and number of free charge carriers are examined separately and lead to consistent results. In polystyrene containing 1% sodium acetate segregation occurs at high temperature and the ρ peak resembles that of the parent polystyrene. When the salt is well dispersed this is no longer the case.","PeriodicalId":6451,"journal":{"name":"1985 5th International Symposium on Electrets (ISE 5)","volume":"18 1","pages":"299-304"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91186223","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
Thermally stimulated current behaviour of polyvinylidene fluoride films on thermomagnetic treatment 热磁处理下聚偏氟乙烯薄膜的热激电流行为
1985 5th International Symposium on Electrets (ISE 5) Pub Date : 1985-09-01 DOI: 10.1109/ISE.1985.7341601
C. Bhatnagar, M. Khare, G. Meenakshi
{"title":"Thermally stimulated current behaviour of polyvinylidene fluoride films on thermomagnetic treatment","authors":"C. Bhatnagar, M. Khare, G. Meenakshi","doi":"10.1109/ISE.1985.7341601","DOIUrl":"https://doi.org/10.1109/ISE.1985.7341601","url":null,"abstract":"Thermally Stimulated Discharge Current (T3DC) in the case of polyvinylidene fluoride film treated chermomagneticaüly has been studied at different linear heating rates, preparing then at various polarizing fields (H<inf>7</inf>) and Temperatures (T<inf>F</inf>). TSDC spectra consists of two peaks at different temperatures (i) 60° to 70° and (ii) 190° to 196° termed as α-and ρ-peaks respectively. The values of activation energy calculated by two different methods show the existence of two tips of traps. TSDC with different heating rates suggests that low heating rates are preferable. The effect of thickness and storage tine has also been studied.","PeriodicalId":6451,"journal":{"name":"1985 5th International Symposium on Electrets (ISE 5)","volume":"84 1","pages":"952-957"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74191728","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
X-ray analysis of electrets 驻极体的x射线分析
1985 5th International Symposium on Electrets (ISE 5) Pub Date : 1985-09-01 DOI: 10.1109/ISE.1985.7341518
O. P. Puri
{"title":"X-ray analysis of electrets","authors":"O. P. Puri","doi":"10.1109/ISE.1985.7341518","DOIUrl":"https://doi.org/10.1109/ISE.1985.7341518","url":null,"abstract":"It is proposed to study the mechanism of the formation and decay of electrets in some non-polar inorganic polycrystalline and amorphous dielectrics. The formation of electrets in these materials under different conditions of sample temperatures polarizing fields and cooling rates will be experimentally pursued. The decay of these electrets both in the open circuit and closed circuit conditions are to be observed (with improved methods whenever possible). An extension of the Swann-Gubkin theory to a more elaborate microscopic theory in agreement with the experimental observations will be sought.","PeriodicalId":6451,"journal":{"name":"1985 5th International Symposium on Electrets (ISE 5)","volume":"107 1","pages":"422-426"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85214615","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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