Superconductivity - Part 10: Critical temperature measurement - Critical temperature of composite superconductors by a resistance method

This part of IEC 61788 specifies a test method for the resistive determination of the critical temperature of composite superconductors for industrial use. The composite superconductors covered in this standard include Cu/Nb-Ti, Cu/Cu-Ni/Nb-Ti and Cu-Ni/Nb-Ti composite superconductors, Cu/Nb3Sn and Cu/Nb3Al composite superconductors, and metal-sheathed MgB2 composite superconductors, and metal-stabilized Bi-system oxide superconductors and Yttrium- or rare-earth-based coated conductors that have a monolithic structure and a shape of round, flat or square wire containing mono- or multi-cores of superconductors.

Supraleitfähigkeit - Teil 10: Messung der kritischen Temperatur - Kritische Temperatur von Verbundsupraleitern bestimmt durch ein Widerstandsmessverfahren

Supraconductivité - Partie 10: Mesure de la température critique - Température critique des composites supraconducteurs par une méthode par résistance

La présente partie de la CEI 61788 décrit une méthode d'essai permettant de déterminer par résistivité la température critique des composites supraconducteurs pour utilisation industrielle. La présente norme couvre des composites supraconducteurs tels que les Cu/Nb-Ti, les Cu/Cu-Ni/Nb-Ti, les Cu-Ni/Nb-Ti, les Cu/Nb3Sn, les Cu/Nb3Al, les MgB2 à gaine métallique, les oxydes supraconducteurs à base Bi stabilisés au métal, ainsi que les conducteurs avec couche d'Yttrium ou de terre rare qui ont une structure monolithique et se présentent sous la forme de fils ronds ou de rubans plats ou carrés constitués de supraconducteurs monofilamentaires ou multifilamentaires.

Superprevodnost - 10. del: Meritve kritične temperature - Merjenje kritične temperature kompozitnih superprevodnikov z metodo upornosti (IEC 61788-10:2006)

General Information

Status
Published
Publication Date
17-Oct-2006
Technical Committee
Drafting Committee
Parallel Committee
Current Stage
6060 - Document made available
Start Date
18-Oct-2006
Completion Date
18-Oct-2006

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SLOVENSKI STANDARD
SIST EN 61788-10:2007
01-februar-2007
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SIST EN 61788-10:2003
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Superconductivity - Part 10: Critical temperature measurement - Critical temperature of

composite superconductors by a resistance method

Supraleitfähigkeit - Teil 10: Messung der kritischen Temperatur - Kritische Temperatur

von Verbundsupraleitern bestimmt durch ein Widerstandsmessverfahren

Supraconductivité - Partie 10: Mesure de la température critique - Température critique

des composites supraconducteurs par une méthode par résistance
Ta slovenski standard je istoveten z: EN 61788-10:2006
ICS:
17.220.20
29.050
SIST EN 61788-10:2007 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
EUROPEAN STANDARD
EN 61788-10
NORME EUROPÉENNE
October 2006
EUROPÄISCHE NORM
ICS 29.050 Supersedes EN 61788-10:2002
English version
Superconductivity
Part 10: Critical temperature measurement -
Critical temperature of composite superconductors
by a resistance method
(IEC 61788-10:2006)
Supraconductivité Supraleitfähigkeit
Partie 10: Mesure de la température Teil 10: Messung der kritischen
critique - Temperatur -
Température critique Kritische Temperatur
des composites supraconducteurs von Verbundsupraleitern bestimmt
par une méthode par résistance durch ein Widerstandsmessverfahren
(CEI 61788-10:2006) (IEC 61788-10:2006)

This European Standard was approved by CENELEC on 2006-09-01. CENELEC members are bound to comply

with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard

the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on

application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CENELEC member into its own language and notified

to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech

Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,

Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 61788-10:2006 E
---------------------- Page: 2 ----------------------
EN 61788-10:2006 - 2 -
Foreword

The text of document 90/191/FDIS, future edition 2 of IEC 61788-10, prepared by IEC TC 90,

Superconductivity, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as

EN 61788-10 on 2006-09-01.
This European Standard supersedes EN 61788-10:2002.

Modifications made in this EN 61788-10:2006 mostly increase covered composite superconductors in this

standard, i.e. Cu/Nb Al and metal-sheathed MgB composite superconductors and Yttrium- or rare-earth-

3 2

based coated conductors are added. Furthermore, examples of technical change made are the base

plate dimension and definition of the bending strain.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2007-06-01
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2009-09-01
with the EN have to be withdrawn
Annex ZA has been added by CENELEC.
__________
Endorsement notice

The text of the International Standard IEC 61788-10:2006 was approved by CENELEC as a European

Standard without any modification.
__________
---------------------- Page: 3 ----------------------
- 3 - EN 61788-10:2006
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated

references, only the edition cited applies. For undated references, the latest edition of the referenced

document (including any amendments) applies.

NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD

applies.
Publication Year Title EN/HD Year
IEC 60050-815 - International Electrotechnical Vocabulary - -
(IEV)
Part 815: Superconductivity
1) 2)
IEC 61788-4 - Superconductivity EN 61788-4 2001
Part 4: Residual resistance ratio
measurement - Residual resistance ratio of
Nb-Ti composite superconductors
Undated reference.
Valid edition at date of issue.
---------------------- Page: 4 ----------------------
NORME CEI
INTERNATIONALE
IEC
61788-10
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2006-08
Supraconductivité –
Partie 10:
Mesure de la température critique –
Température critique des composites
supraconducteurs par une méthode
par résistance
Superconductivity –
Part 10:
Critical temperature measurement –
Critical temperature of composite
superconductors by a resistance method
 IEC 2006 Droits de reproduction réservés  Copyright - all rights reserved

Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any

utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including

électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from

microfilms, sans l'accord écrit de l'éditeur. the publisher.

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Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch

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Pour prix, voir catalogue en vigueur
For price, see current catalogue
---------------------- Page: 5 ----------------------
61788-10  IEC:2006 – 3 –
CONTENTS

FOREWORD...........................................................................................................................5

INTRODUCTION.....................................................................................................................9

1 Scope.............................................................................................................................11

2 Normative references.....................................................................................................11

3 Terms and definitions .....................................................................................................11

4 Determination of critical temperature ..............................................................................11

5 Requirements.................................................................................................................13

6 Apparatus.......................................................................................................................13

7 Measurement procedure.................................................................................................15

8 T determination.............................................................................................................19

9 Accuracy and stability.....................................................................................................19

10 Test report......................................................................................................................19

Annex A (informative) Additional information relating to measurement of critical

temperature ..........................................................................................................................25

Figure 1 – Determination of critical temperature (T ).............................................................21

Figure 2 – Typical voltage versus temperature curves for first and second runs ....................23

---------------------- Page: 6 ----------------------
61788-10  IEC:2006 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
SUPERCONDUCTIVITY –
Part 10: Critical temperature measurement –
Critical temperature of composite superconductors
by a resistance method
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC 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 dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any

equipment declared to be in conformity with an IEC Publication.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 61788-10 has been prepared by IEC technical committee 90:

Superconductivity.

This second edition cancels and replaces the first edition published in 2002. It constitutes a

technical revision. Modifications made to the second edition mostly increase covered

composite superconductors in this standard, i.e. Cu/Nb Al and metal-sheathed MgB
3 2

composite superconductors and Yttrium- or rare-earth-based coated conductors are added.

Furthermore, examples of technical change made are the base plate dimension and definition

of the bending strain.
---------------------- Page: 7 ----------------------
61788-10  IEC:2006 – 7 –
The text of this standard is based on the following documents:
FDIS Report on voting
90/191/FDIS 90/194/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all parts of the IEC 61788 series, published under the general title Superconductivity,

can be found on the IEC website.

The committee has decided that the contents of this publication will remain unchanged until

the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in

the data related to the specific publication. At this date, the publication will be

• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
---------------------- Page: 8 ----------------------
61788-10  IEC:2006 – 9 –
INTRODUCTION

In addition to critical current and critical field, critical temperature is an important, basic

property of materials that exhibit superconductivity. Also, critical temperature is practically

important in applications of superconductors, since the higher the critical temperature is, the

larger is temperature margin and the lower the cooling power consumption. Thus,

standardization of the measurement method of critical temperature is quite beneficial to

conductor users and is urgently required.

There are a lot of test methods to measure the critical temperature of superconductors,

including the resistance method, d.c. susceptibility methods using a SQUID magnetometer

and VSM (vibrating-sample magnetometer), a.c. susceptibility methods, specific heat

methods etc.

Test methods, other than the resistance method, may generally be more sensitive and

informative compared to the resistance method and may be more appropriate for non-

homogeneous materials or for thick films, thin films, bulks and powders, for which the

resistance method is difficult to apply.

In this International Standard, however, the resistance measurement method is employed.

This is because the resistance method is simpler and more reliable and can be applied to

most of the composite superconductors in industrial use.

The outline of this standard was basically prepared by the Japan Fine Ceramics Association,

a member institution of VAMAS (Versailles Project on Advanced Materials and Standards),

TWA16 (Superconducting materials). The extensive revisions of the outline were primarily

made by the New Materials Center supervised by the Japan National Committee and VAMAS.

---------------------- Page: 9 ----------------------
61788-10  IEC:2006 – 11 –
SUPERCONDUCTIVITY –
Part 10: Critical temperature measurement –
Critical temperature of composite superconductors
by a resistance method
1 Scope

This part of IEC 61788 specifies a test method for the resistive determination of the critical

temperature of composite superconductors for industrial use.

The composite superconductors covered in this standard include Cu/Nb-Ti, Cu/Cu-Ni/Nb-Ti

and Cu-Ni/Nb-Ti composite superconductors, Cu/Nb Sn and Cu/Nb Al composite super-

3 3

conductors, and metal-sheathed MgB composite superconductors, and metal-stabilized Bi-

system oxide superconductors and Yttrium- or rare-earth-based coated conductors that have

a monolithic structure and a shape of round, flat or square wire containing mono- or multi-

cores of superconductors.
2 Normative references

The following referenced documents are indispensable for the application of this document.

For dated references, only the edition cited applies. For undated references, the latest edition

...

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