ISO INTERNATIONAL STANDARD 23331 First edition 2021-07 Fine ceramics (advanced ceramics, advanced technical ceramics) - Test method for total electrical conductivity of conductive fine ceramics Céramiques techniques-Methoded'essai pour la conductivite electriquetotaledes ceramiques techniques conductrices Referencenumber IS0 23331:2021(E) ISO IS02021 IS0 23331:2021(E) COPYRIGHTPROTECTEDDOCUMENT IS02021 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting below or Iso's memberbody in the country ofthe requester. ISO copyright office CP 40i : Ch.de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22.749 01 11 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2021 - All rights reserved IS023331:2021(E) Contents Page Foreword ..iv 1 Scope ..1 2 Normative references 3 Terms and definitions 4 Symbols. ..2 .3 5 Principle 6 Apparatus .3 6.1 Measurement system. .3 6.2 .3 Furnace. 6.3 Voltmeter. .3 6.4 Constant direct current (DC) supply .4 6.5 Wireelectrodesand leadwires 4 6.6 Caliper. 6.7 Micrometer. 4 7 Testpiece. .4 7.1 Shape and dimensions .4 7.2 Surface roughness. 4 7.3 Density .4 7.4 Configuration offour wire electrodes .5 7.5 Numberoftestpieces .5 8 Test procedure. .5 8.1 Dimension measurement ofatest piece. .5 8.2 Heating ofatestpiece .5 8.3 Maintenance of gas composition and gasflow rate 6 8.4 Measurementoftotal electricalconductivity .6 9 Calculation of total electrical conductivity .6 10 Expression oftotal electrical conductivity. .7 10.1 Thevalueof total electrical conductivity .7 10.2 The expression of total electrical conductivity .7 11 Analysis of precision and uncertainty .7 12 Test report ..7 Bibliography 8 @ IS0 2021 - All rights reserved ili