Fine ceramics (advanced ceramics, advanced technical ceramics) — Measurement of iso-electric point of ceramic powder

This document specifies the test method to determine the iso-electric point of fine ceramic powders, which is measured in the state of suspension.

Céramiques techniques — Mesure du point iso-électrique de poudres céramiques

General Information

Status
Published
Publication Date
26-Nov-2019
Technical Committee
Drafting Committee
Current Stage
6060 - International Standard published
Start Date
27-Nov-2019
Due Date
19-Oct-2019
Completion Date
27-Nov-2019
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ISO 21822:2019 - Fine ceramics (advanced ceramics, advanced technical ceramics) -- Measurement of iso-electric point of ceramic powder
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INTERNATIONAL ISO
STANDARD 21822
First edition
2019-11
Fine ceramics (advanced ceramics,
advanced technical ceramics) —
Measurement of iso-electric point of
ceramic powder
Céramiques techniques — Mesure du point iso-électrique de poudres
céramiques
Reference number
ISO 21822:2019(E)
©
ISO 2019

---------------------- Page: 1 ----------------------
ISO 21822:2019(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
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
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Published in Switzerland
ii © ISO 2019 – All rights reserved

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ISO 21822:2019(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 3
5 Apparatus and calibration . 3
5.1 Zeta potential analyser and calibration . 3
5.2 pH meter . 3
5.3 Sample dispersion vessel . 3
5.4 Sonicator . 4
5.5 Balance . 4
5.6 Temperature-control device . 4
5.7 Magnetic stirrer . 4
6 Operational procedures . 4
6.1 Dispersion solution . 4
6.2 pH-adjusting acid or base and electrolyte solution . 4
6.3 Sample preparation and dispersion . 4
6.3.1 Preparation . 4
6.3.2 Dispersion . 4
6.3.3 Stabilization . 5
7 Measurement . 5
8 Determination of the iso-electric point . 5
9 Test report . 6
Bibliography . 7
© ISO 2019 – All rights reserved iii

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ISO 21822:2019(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
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This document was prepared by Technical Committee ISO/TC 206, Fine ceramics.
Any feedback or questions on this document should be directed to the user’s national standards body. A
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iv © ISO 2019 – All rights reserved

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INTERNATIONAL STANDARD ISO 21822:2019(E)
Fine ceramics (advanced ceramics, advanced technical
ceramics) — Measurement of iso-electric point of
ceramic powder
1 Scope
This document specifies the test method to determine the iso-electric point of fine ceramic powders,
which is measured in the state of suspension.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
ISO 4316, Surface active agents — Determination of pH of aqueous solutions — Potentiometric method
ISO 13099-1, Colloidal systems — Methods for zeta-potential determination — Part 1: Electroacoustic and
electrokinetic phenomena
ISO 13099-2, Colloidal systems — Methods for zeta-potential determination — Part 2: Optical methods
ISO 13099-3, Colloidal systems — Methods for zeta potential determination — Part 3: Acoustic methods
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 13099-1, ISO 13099-2 and
ISO 13099-3 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
zeta potential
ζ-potential
difference between the electric potential at the slipping plane and that of the bulk
...

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