Insulating materials for super-conductors, their characteristics at cryogenic temperature

ICSD'98. Proceedings of the 1998 IEEE 6th International Conference on Conduction and Breakdown in Solid Dielectrics (Cat. No.98CH36132) Pub Date : 1998-06-22 DOI:10.1109/ICSD.1998.709300

E. Husain, M. M. Mohsin, S. Naqvi

{"title":"Insulating materials for super-conductors, their characteristics at cryogenic temperature","authors":"E. Husain, M. M. Mohsin, S. Naqvi","doi":"10.1109/ICSD.1998.709300","DOIUrl":null,"url":null,"abstract":"Liquid nitrogen (LN/sub 2/) and cryogenic nitrogen (CGN/sub 2/) are found suitable not only as coolants but also as insulating materials for high critical temperature superconductors (HTSC). Experimental studies have been carried out to evaluate the dielectric strength of LN/sub 2/, under varying field conditions. Experiments were also performed with CGN/sub 2/ and solid insulting materials immersed in LN/sub 2/ using spherical electrodes. The breakdown strength of insulating materials has been found to increase significantly at cryogenic temperatures in comparison to atmospheric temperatures. The increase in breakdown strength of insulating materials like cotton tape, empire tape, Leatheroid paper, varnished paper, Presspahn, Bakelite sheet and mica is comparatively large with respect to materials like P.V.C., minimax and perspex. No apparent physical change was noticed in case of cotton tape, empire tape, Leatheroid paper, varnished paper, Presspahn, Bakelite sheet and mica, when immersed in LN/sub 2/ while minimax P.V.C. and perspex sheet got hardened and colour of rest pieces of these materials got faded till they remained immersed in LN/sub 2/.","PeriodicalId":13148,"journal":{"name":"ICSD'98. Proceedings of the 1998 IEEE 6th International Conference on Conduction and Breakdown in Solid Dielectrics (Cat. No.98CH36132)","volume":"4 1","pages":"361-364"},"PeriodicalIF":0.0000,"publicationDate":"1998-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ICSD'98. Proceedings of the 1998 IEEE 6th International Conference on Conduction and Breakdown in Solid Dielectrics (Cat. No.98CH36132)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICSD.1998.709300","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 3

Abstract

Liquid nitrogen (LN/sub 2/) and cryogenic nitrogen (CGN/sub 2/) are found suitable not only as coolants but also as insulating materials for high critical temperature superconductors (HTSC). Experimental studies have been carried out to evaluate the dielectric strength of LN/sub 2/, under varying field conditions. Experiments were also performed with CGN/sub 2/ and solid insulting materials immersed in LN/sub 2/ using spherical electrodes. The breakdown strength of insulating materials has been found to increase significantly at cryogenic temperatures in comparison to atmospheric temperatures. The increase in breakdown strength of insulating materials like cotton tape, empire tape, Leatheroid paper, varnished paper, Presspahn, Bakelite sheet and mica is comparatively large with respect to materials like P.V.C., minimax and perspex. No apparent physical change was noticed in case of cotton tape, empire tape, Leatheroid paper, varnished paper, Presspahn, Bakelite sheet and mica, when immersed in LN/sub 2/ while minimax P.V.C. and perspex sheet got hardened and colour of rest pieces of these materials got faded till they remained immersed in LN/sub 2/.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

超导体用绝缘材料及其低温特性

液氮(LN/sub 2/)和低温氮(CGN/sub 2/)不仅适合作为冷却剂，而且适合作为高温超导体(HTSC)的绝缘材料。实验研究了不同场强条件下LN/sub - 2/的介电强度。采用球形电极对CGN/sub - 2/和固体绝缘材料浸在LN/sub - 2/中进行了实验。绝缘材料的击穿强度已被发现在低温下比在大气温度下显著增加。与聚氯乙烯、minimax和有机玻璃等材料相比，棉带、帝国带、人造革纸、漆纸、印刷纸、胶木板和云母等绝缘材料的击穿强度增加相对较大。在浸在LN/sub - 2/中，棉带、帝国带、人革纸、漆纸、胶木板和云母没有明显的物理变化，而聚氯乙烯和有机玻璃板的最小值变硬，其余材料的颜色褪色，直到它们浸在LN/sub - 2/中。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

ICSD'98. Proceedings of the 1998 IEEE 6th International Conference on Conduction and Breakdown in Solid Dielectrics (Cat. No.98CH36132)

自引率

0.00%

发文量