1、 INTERNATIONAL STANDARD IEC61788-3 Second edition2006-04 Superconductivity Part 3:Critical current measurement DC critical current of Ag-and/or Ag alloy-sheathed Bi-2212 and Bi-2223 oxide superconductors Reference number IEC 61788-3:2006(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE
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9、t of Ag-and/or Ag alloy-sheathed Bi-2212 and Bi-2223 oxide superconductors IEC 2006 Copyright-all rights reserved No part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from the
10、 publisher.International Electrotechnical Commission,3,rue de Varemb,PO Box 131,CH-1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.ch T For price,see current cataloguePRICE CODE Commission Electrotechnique InternationaleInternational Elec
11、trotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 61788-3 IEC:2006(E)CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6 2 Normative reference.6 3 Terms and definitions.6 4 Principle.8 5 Requirements.8 6 Apparatus.8 7
12、Specimen preparation.9 8 Measurement procedure.10 9 Precision and accuracy of the test method.11 10 Calculation of results.12 11 Test report.13 Annex A(informative)Additional information relating to Clauses 1 to 10.15 Annex B(informative)Magnetic hysteresis of the critical current of high-temperatur
13、e oxide superconductors.21 Bibliography.23 Figure 1 Intrinsic U-I characteristic.14 Figure 2 U-I characteristic with a current transfer component.14 Figure A.1 Illustration of a measurement configuration for a short specimen of a few hundred A class conductors.20 Figure A.2 Illustration of supercond
14、uctor simulator circuit.20 Table A.1 Thermal expansion data of Bi-oxide superconductor and selected materials.19 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.61788-3 IEC:2006(E)3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ SUPERCOND
15、UCTIVITY Part 3:Critical current measurement DC critical current of Ag-and/or Ag alloy-sheathed Bi-2212 and Bi-2223 oxide superconductors FOREWORD 1)The International Electrotechnical Commission(IEC)is a worldwide organization for standardization comprising all national electrotechnical committees(I
16、EC National Committees).The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields.To this end and in addition to other activities,IEC publishes International Standards,Technical Specifications,Technical Reports,Publicly Available Specifications(PAS)and Guides(hereafter referred to as“IEC Publication(s)”).Their preparation is entrusted to technical committees;any IEC National Committee interested in the subject d
