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Digest of Literature on Dielectrics Volume 42 1978最新文献

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Electrical properties of polymers 聚合物的电性能
Digest of Literature on Dielectrics Volume 42 1978 Pub Date : 1977-10-01 DOI: 10.1109/DLD.1977.7731995
P. Hedvig
{"title":"Electrical properties of polymers","authors":"P. Hedvig","doi":"10.1109/DLD.1977.7731995","DOIUrl":"https://doi.org/10.1109/DLD.1977.7731995","url":null,"abstract":"The interest in studying electrical conduction and polarization phenomena in polymers has increased since last year. Besides the classical problems of conduction, polarization and breakdown in polymeric insulators, interesting for the electric and electronic industry, new aspects are being considered by more and more research groups in the field. One of these is the application of the dielectric method, especially the depolarization technique, for studying molecular mobilities, i.e., multiple phase transitions in polymeric systems. Combined with mechanical relaxation, thermal analysis, magnetic resonance and with some additional techniques dielectric spectroscopy is becoming a powerful tool for studying the phase-structure of such complex polymer systems as blends, filled, and reinforced materials. This way the dielectric technique is helpful in quality control even of such systems which are not used in the electrical or electronic industry.","PeriodicalId":244193,"journal":{"name":"Digest of Literature on Dielectrics Volume 42 1978","volume":"312 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122812189","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: 589
Conduction and breakdown in vacuum 在真空中导电和击穿
Digest of Literature on Dielectrics Volume 42 1978 Pub Date : 1977-10-01 DOI: 10.1109/DLD.1978.7739928
G. Farrall
{"title":"Conduction and breakdown in vacuum","authors":"G. Farrall","doi":"10.1109/DLD.1978.7739928","DOIUrl":"https://doi.org/10.1109/DLD.1978.7739928","url":null,"abstract":"One of the areas of most active interest in with conduction in vacuum over the past year has been the behavior of vacuum arcs at high currents. The subject is of enormous practical interest to vacuum interrupter development and involves a variety of physical processes the interactions of which provide fertile ground for novel experimental and theoretical investigations. The vital question concerns the Jeckyl and Hyde character of the vacuum arc anode junction. At low currents the anode is diffuse and passive with the anode terminal acting largely as a charge collector over its entire exposed area. At high currents the anode end of the arc may contract causing a high concentration of energy input to the electrode surface. This transition results in severe melting and violent ejection of anode metal. A variety of investigations on this subject are discussed in the section on The Arc Anode and include such subjects as the effects of axial magnetic fields, the visual appearance of the high current arc under different ignition conditions,, the current flow pattern between cathode and anode at high current, and the ion flux distribution from the cathode to the anode.","PeriodicalId":244193,"journal":{"name":"Digest of Literature on Dielectrics Volume 42 1978","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125126455","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
Tables of permittivity, dipole moment, and dielectric relaxation time 介电常数、偶极矩和介电弛豫时间表
Digest of Literature on Dielectrics Volume 42 1978 Pub Date : 1977-10-01 DOI: 10.1109/DLD.1977.7731608
C. Huraux, B. Despax
{"title":"Tables of permittivity, dipole moment, and dielectric relaxation time","authors":"C. Huraux, B. Despax","doi":"10.1109/DLD.1977.7731608","DOIUrl":"https://doi.org/10.1109/DLD.1977.7731608","url":null,"abstract":"The article includes tables containing data on static permittivities of solids and liquids, dipole moments, and dielectric relaxation time. Properties of both organic and inorganic compounds and liquid crystalline materials are presented.","PeriodicalId":244193,"journal":{"name":"Digest of Literature on Dielectrics Volume 42 1978","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126601917","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
Conduction, breakdown and electronic-ionic phenomena in liquids 液体中的传导、击穿和电子离子现象
Digest of Literature on Dielectrics Volume 42 1978 Pub Date : 1900-01-01 DOI: 10.1109/DLD.1978.7739926
P. McGrath
{"title":"Conduction, breakdown and electronic-ionic phenomena in liquids","authors":"P. McGrath","doi":"10.1109/DLD.1978.7739926","DOIUrl":"https://doi.org/10.1109/DLD.1978.7739926","url":null,"abstract":"This chapter essentially covers the behavior of dielectric liquids subjected to electric fields. The separation of sections is generally self evident but for Conduction and Electronic and Ionic Phenomena, the division is less well defined. It will be found that topics involving carrier velocity and mobility have, for the most part, been included in the conduction section. Included in this review are papers presented at the IEEE International Symposium on Electrical Insulation held in June 1978, in Philadelphia, PA and the Conference on Electrical Insulation and Dielectric Phenomena held in October 1978 in Pocono Manner, PA. Also held in July of 1978 was the Sixth International Conference on Conduction and Breakdown in Dielectric Liquids, Rouen, France. The incidence of the latter conference, in addition to those held annually, may have been responsible for the reduction in the amount of conduction and breakdown material appearing in the literature. Consequently, many of the high quality contributions channeled into the conference are here reviewed, alongside the usual journal material.","PeriodicalId":244193,"journal":{"name":"Digest of Literature on Dielectrics Volume 42 1978","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126478269","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
Insulating films 绝缘的电影
Digest of Literature on Dielectrics Volume 42 1978 Pub Date : 1900-01-01 DOI: 10.1109/dld.1977.7731996
A. M. Phahle
{"title":"Insulating films","authors":"A. M. Phahle","doi":"10.1109/dld.1977.7731996","DOIUrl":"https://doi.org/10.1109/dld.1977.7731996","url":null,"abstract":"This chapter is concerned with various aspects of insulating films. These films, because of their many applications, continue to attract a great deal of attention. The review is based on the literature abstracted in Physics Abstracts, Electrical and Electronics Abstracts, and directly from papers published in various scientific journals.","PeriodicalId":244193,"journal":{"name":"Digest of Literature on Dielectrics Volume 42 1978","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123357911","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
Cryogenics 低温学
Digest of Literature on Dielectrics Volume 42 1978 Pub Date : 1900-01-01 DOI: 10.1109/dld.1978.7739955
John Gilchrist, R. Isnard
{"title":"Cryogenics","authors":"John Gilchrist, R. Isnard","doi":"10.1109/dld.1978.7739955","DOIUrl":"https://doi.org/10.1109/dld.1978.7739955","url":null,"abstract":"Three international low temperature conferences were held in Europe in 1978: a physics conference, an engineering conference, and a materials conference. The intended coverage of this cryogenics chapter is just about coextensive with the subject areas which were treated at these meetings, so far as they concerned dielectrics. Contributions to LT15 (1) or ICEC7 (2), the latest of two major conference series will be referred to under practically all the different subheadings of the chapter. Cryogenic space engineering was given some prominence at ICEC7 amongst the more usual topics. The ICMC symposium (3) was the first such meeting to deal exclusively with non-metallic materials at low temperatures. The major topic was low temperature structural materials, and especially composites, with thermal and electrical insulating materials as important minor topics. We shall also be referring to the proceedings of a Lattice Dynamics conference (4) and of dielectric conferences not specifically concerned with low temperatures (5,6). In this introductory section we shall draw attention to a few pertinent publications of general or miscellaneous interest before dealing with the more specialised topics.","PeriodicalId":244193,"journal":{"name":"Digest of Literature on Dielectrics Volume 42 1978","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121508841","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: 199
Electrification due to the separation of materials 由于物料分离而产生的电气化
Digest of Literature on Dielectrics Volume 42 1978 Pub Date : 1900-01-01 DOI: 10.1109/dld.1977.7731997
D. Hays
{"title":"Electrification due to the separation of materials","authors":"D. Hays","doi":"10.1109/dld.1977.7731997","DOIUrl":"https://doi.org/10.1109/dld.1977.7731997","url":null,"abstract":"Most dielectric materials acquire an electrostatic charge when brought into contact with, and then separated from, a dissimilar material. If the contacting materials are identical, electrification is observed when the two bodies are asymmetrically rubbed together. Electrification is also obtained if a dielectric material, such as mica, is simply cleaved into two parts. Since dielectric materials are good insulators, charge accumulated on a dielectric body decays very slowly. Charge retention on dielectric materials usually represents a nuisance (shocks, dust collection, etc.) or a hazard (explosion of fuels, powders, etc.). On the other hand, the motion of small dielectric particles can be controlled via an electric field if the particles acquire an electrostatic charge by contact and separation from other materials. The ability to manipulate charged particles with an electrostatic force is utilized in the electrophotographic copying process, spray painting, and separation of ores.","PeriodicalId":244193,"journal":{"name":"Digest of Literature on Dielectrics Volume 42 1978","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116681044","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
Dielectric aspects of biological materials 生物材料的介电特性
Digest of Literature on Dielectrics Volume 42 1978 Pub Date : 1900-01-01 DOI: 10.1109/DLD.1978.7739954
C. Smith
{"title":"Dielectric aspects of biological materials","authors":"C. Smith","doi":"10.1109/DLD.1978.7739954","DOIUrl":"https://doi.org/10.1109/DLD.1978.7739954","url":null,"abstract":"The 1978 Conference on Electrical Insulation and Dielectric Phenomena (1) included a session on the Dielectric properties of Biological Systems. This session was chaired by Professor H. P. Schwan of the University of Pennsylvania and was organized by the present writer on behalf of the Dielectrics Society which co-sponsored it. The introductory paper concluded that while dielectric measurements on biological materials can be very sensitive and non-invasive they are seldom specific in a chemical or biological sense. The most important of the recent trends in dielectrics is towards combining the high sensitivity of dielectric measurements with the specificity of some other physical or chemical measurement made on the same system. There are a number of such examples to be found among the papers listed in this chapter. The most difficult overall problems are those of electrode effects with the highly conducting materials encountered and the difficulties of measuring an effective geometrical shape of the specimens. Professor R. H. Cole continues to make progress with the former problem and Professor H. A. Pohl and Dr. R. Pethig have developed dielectrophoresis techniques for measurement of the dielectric properties of biological materials, and which avoid the shape factor.","PeriodicalId":244193,"journal":{"name":"Digest of Literature on Dielectrics Volume 42 1978","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134571298","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
Dielectric breakdown of solids 固体介质击穿
Digest of Literature on Dielectrics Volume 42 1978 Pub Date : 1900-01-01 DOI: 10.1109/DLD.1978.7739925
R. Cooper, B. Varlow
{"title":"Dielectric breakdown of solids","authors":"R. Cooper, B. Varlow","doi":"10.1109/DLD.1978.7739925","DOIUrl":"https://doi.org/10.1109/DLD.1978.7739925","url":null,"abstract":"In the course of this survey we have consulted more than 60 journals, conference and symposium reports originating from 16 countries. The principal sources of information were the Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, published by the National Academy of Sciences, Washington, D.C., and the publications of IEEE and of IEE (London). It is eight years since the authors produced a literature survey on this topic and it is interesting to note, on the one hand, an apparent decline of interest in the problem of intrinsic electric strength and in the breakdown of thin films. On the other hand, strong interest has emerged in the effects of morphology on various aspects of the electrical breakdown of polymers. As a consequence of this growing interest and the importance of the structure of dielectric materials, especially polymers, with regard to their electrical properties, we have introduced this topic under its own heading.","PeriodicalId":244193,"journal":{"name":"Digest of Literature on Dielectrics Volume 42 1978","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130223614","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
Dielectric behavior and structure of gases, liquids, and solids 气体、液体和固体的介电行为和结构
Digest of Literature on Dielectrics Volume 42 1978 Pub Date : 1900-01-01 DOI: 10.1109/dld.1977.7731609
D. Kranbuehl, W. Vaughan
{"title":"Dielectric behavior and structure of gases, liquids, and solids","authors":"D. Kranbuehl, W. Vaughan","doi":"10.1109/dld.1977.7731609","DOIUrl":"https://doi.org/10.1109/dld.1977.7731609","url":null,"abstract":"Investigations of fundamental dielectric properties of atoms, molecules, and ions in the gaseous, liquid, and solid states constitute a major portion of the literature on dielectrics. This chapter is concerned with basic dielectric phenomena. Papers that are more appropriately discussed under the titles of other chapters have been omitted.","PeriodicalId":244193,"journal":{"name":"Digest of Literature on Dielectrics Volume 42 1978","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128061282","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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