ISO 21822:2019
(Main)Fine ceramics (advanced ceramics, advanced technical ceramics) — Measurement of iso-electric point of ceramic powder
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
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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 2019
© 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
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
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
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
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
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
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/
iso/ foreword .html.
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
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2019 – All rights reserved
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
...
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 2019
© 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
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
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
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
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
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
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/
iso/ foreword .html.
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
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2019 – All rights reserved
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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