ISO 24369:2005

Fine ceramics (advanced ceramics, advanced technical ceramics) — Determination of content of coarse particles in ceramic powders by wet sieving method

ISO 24369:2005 specifies the procedure to determine the content of coarse particles in a fine ceramic powder and/or in a fine ceramic suspension using an aqueous-based wet sieving method.

Céramiques techniques — Détermination du contenu en particules grossières des poudres de céramique par la méthode de tamisage humide

General Information

• Status: Published
• Publication Date: 28-Sep-2005
• ICS: 81.060.30 - Advanced ceramics
• Technical Committee: ISO/TC 206 - Fine ceramics
• Drafting Committee: ISO/TC 206/WG 2 - Powders
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 30-Nov-2020

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 24369
First edition
2005-10-01


Fine ceramics (advanced ceramics,
advanced technical ceramics) —
Determination of content of coarse
particles in ceramic powders by wet
sieving method
Céramiques techniques — Détermination du contenu en particules
grossières des poudres de céramique par la méthode de tamisage
humide





Reference number
ISO 24369:2005(E)
©
ISO 2005

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ISO 24369:2005(E)
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ii © ISO 2005 – All rights reserved

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ISO 24369:2005(E)
Contents Page
Foreword. iv
1 Scope . 1
2 Terms and definitions. 1
3 Apparatus . 1
4 Sampling. 2
5 Measuring procedures . 2
6 Calculation. 4
7 Report . 5

© ISO 2005 – All rights reserved iii

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ISO 24369:2005(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 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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 24369 was prepared by Technical Committee ISO/TC 206, Fine ceramics.
iv © ISO 2005 – All rights reserved

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INTERNATIONAL STANDARD ISO 24369:2005(E)

Fine ceramics (advanced ceramics, advanced technical
ceramics) — Determination of content of coarse particles
in ceramic powders by wet sieving method
1 Scope
This International Standard specifies the procedure to determine the content of coarse particles in a fine
ceramic powder and/or in a fine ceramic suspension using an aqueous-based wet sieving method. The
procedure is applicable to fine ceramic powders of both micrometre and submicrometre size ranges. It is valid
when there are greater than 10 mg/kg coarse particles in the powders.
NOTE It is recommended that new operators of this test method become familiar with the procedure, using a
reference powder on slurry with a known quantity of coarse particles present.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
coarse particles
particles and/or aggregates that cannot pass a 500 mesh sieve with 25 µm mesh size
2.2
percentage of coarse particles
ratio of the mass of the coarse particles (remaining on the sieve) to the total mass of the powder sample
analysed
2.3
suspension
ceramic powder suspended in an aqueous medium
2.4
solid content
amount of powder in a suspension, ratio of the mass of powder to the total mass of the suspension
(powder + medium)
3 Apparatus
3.1 Sieve: 500 mesh (the aperture size is 25 µm).
A stainless-steel rimmed sieve is recommended.
3.2 Analytical balance, having a readability of at least 0,1 mg.
3.3 Bottle: a glass weighing bottle with known mass m .
a
3
3.4 Glass beaker, with a known mass m and a volume of at least 250 cm .
e
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ISO 24369:2005(E)
3.5 Pipette, 10 ml.
3.6 Oven: capable of controlling a temperature of 105 °C ± 5 °C.
3.7 Stirring apparatus: magnetic stirrer and polytetrafluoroethylene (PTFE)-coated stir bar.
3.8 Ultrasonic bath.
3.9 Desiccator or vacuum chamber.
4 Sampling
A sample of suspension is required. The amount of powder needed for the measurement is about 30 g ± 2 g.
The solid content of the suspension may vary but must be known (in weight percent).
5 Measuring procedures
In the following measuring procedures, humidity is easily adsorbed either from hands or from the air.
Therefore, be careful not to touch the sieve and glass weighing bottle with bare hands; use clean tongs or
powder-free latex gloves.
5.1 Washing and drying of sieve
Submerse the entire sieve in a clean ultrasonic bath filled with distilled water, and ultrasonicate for 10 min. It is
recommended that the sieve is upright in the ultrasonic bath to avoid the re-adhesion of undesirable particles.
Remove the sieve and drain bath, refill with fresh distilled water, and repeat the treatment.
After washing, place the sieve in an oven, and dry it at 105 °C for 2 h. After drying, cool the sieve down to
room temp
...