EN ISO 21821:2022
(Main)Fine ceramics (advanced ceramics, advanced technical ceramics) - Determination of densification properties of ceramic powders on natural sintering (ISO 21821:2019)
Fine ceramics (advanced ceramics, advanced technical ceramics) - Determination of densification properties of ceramic powders on natural sintering (ISO 21821:2019)
This document specifies the test method to determine the extent to which ceramic powder compacts made of granulated or ungranulated ceramic powders are densified, when they are sintered at a high temperature without the application of any external pressure or external densification force. The test method is applicable to pure oxides, mixtures of oxides and solid solutions, and is also applicable to non-oxides (e.g. carbides, nitrides) that can be sintered under vacuum or constant gas pressure (1 bar or less) to prevent oxidation or decomposition. The test method is not applicable to ceramics that can only be sintered using pressure-assisted sintering techniques such as hot pressing (HP), hot isostatic pressing (HIP), gas pressure sintering (GPS) or spark plasma sintering (SPS). Inorganic sintering additives can be used where their presence is reported.
Hochleistungskeramik - Bestimmung des Verdichtungsverhaltens keramischer Pulver beim natürlichen Sinterbrand (ISO 21821:2019)
Céramiques techniques (céramiques avancées, céramiques techniques avancées) - Détermination des propriétés de densification des poudres céramiques lors d'un frittage naturel (ISO 21821:2019)
Le présent document spécifie la méthode d’essai permettant de déterminer dans quelle mesure les comprimés de poudre céramique constitués de poudres céramiques granulées ou non sont densifiés, lorsqu’ils sont frittés à haute température sans appliquer de pression externe ni de force de densification externe. La méthode d’essai s’applique aux oxydes purs, aux mélanges d’oxydes et de solutions solides, et également aux matériaux ne contenant pas d’oxyde (par exemple carbures, nitrures) qui peuvent être frittés sous vide ou sous pression de gaz constante (à 1 bar ou moins) pour empêcher l’oxydation ou la décomposition. La méthode d’essai ne s’applique pas aux céramiques qui ne peuvent être frittées qu’à l’aide de techniques de frittage assistées par pression telles que la compression à chaud («hot pressing», HP), la compression isostatique à chaud («hot isostatic pressing», HIP), le frittage sous pression de gaz («gas pressure sintering», GPS) ou le frittage flash («spark plasma sintering», SPS). Des additifs de frittage inorganiques peuvent être utilisés lorsque leur présence est signalée.
Fina keramika (sodobna keramika, sodobna tehnična keramika) - Določanje zgoščevalnih lastnosti keramičnega prahu pri naravnem sintranju (ISO 21821:2019)
Ta dokument določa preskusne metode za določanje obsega zgostitve kompaktnega keramičnega prahu, izdelanega iz granuliranih ali negranuliranih keramičnih praškov med sintranjem pri visoki temperaturi brez uporabe zunanjega tlaka ali zunanje zgoščevalne sile. Preskusna metoda se uporablja za čiste okside, zmesi oksidov in trdnih raztopin ter tudi za neokside (npr. karbide, nitride), ki jih je mogoče sintrati v vakuumu ali pri stalnem plinskem tlaku (1 bar ali manj), da se prepreči oksidacija oziroma razgradnja. Preskusna metoda se ne uporablja za keramiko, ki jo je mogoče sintrati samo s tehnikami sintranja s pomočjo tlaka, kot je vroče stiskanje (HP), vroče izostatično stiskanje (HIP), sintranje s plinskim tlakom (GPS) ali sintranje v iskreči plazmi (SPS). Anorganske dodatke za sintranje je mogoče uporabiti, če so prisotni.
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 21821:2023
01-februar-2023
Nadomešča:
SIST EN 725-11:2007
Fina keramika (sodobna keramika, sodobna tehnična keramika) - Določanje
zgoščevalnih lastnosti keramičnega prahu pri naravnem sintranju (ISO
21821:2019)
Fine ceramics (advanced ceramics, advanced technical ceramics) - Determination of
densification properties of ceramic powders on natural sintering (ISO 21821:2019)
Hochleistungskeramik - Bestimmung des Verdichtungsverhaltens keramischer Pulver
beim natürlichen Sinterbrand (ISO 21821:2019)
Céramiques techniques (céramiques avancées, céramiques techniques avancées) -
Détermination des propriétés de densification des poudres céramiques lors d'un frittage
naturel (ISO 21821:2019)
Ta slovenski standard je istoveten z: EN ISO 21821:2022
ICS:
81.060.30 Sodobna keramika Advanced ceramics
SIST EN ISO 21821:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 21821:2023
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SIST EN ISO 21821:2023
EN ISO 21821
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2022
EUROPÄISCHE NORM
ICS 81.060.30 Supersedes EN 725-11:2006
English Version
Fine ceramics (advanced ceramics, advanced technical
ceramics) - Determination of densification properties of
ceramic powders on natural sintering (ISO 21821:2019)
Céramiques techniques (céramiques avancées, Hochleistungskeramik - Bestimmung des
céramiques techniques avancées) - Détermination des Verdichtungsverhaltens keramischer Pulver beim
propriétés de densification des poudres céramiques natürlichen Sinterbrand (ISO 21821:2019)
lors d'un frittage naturel (ISO 21821:2019)
This European Standard was approved by CEN on 21 November 2022.
CEN 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 CEN-CENELEC Management Centre or to any CEN
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 CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 21821:2022 E
worldwide for CEN national Members.
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SIST EN ISO 21821:2023
EN ISO 21821:2022 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 21821:2023
EN ISO 21821:2022 (E)
European foreword
The text of ISO 21821:2019 has been prepared by Technical Committee ISO/TC 206 "Fine ceramics” of
the International Organization for Standardization (ISO) and has been taken over as EN ISO 21821:2022
by Technical Committee CEN/TC 184 “Advanced technical ceramics” the secretariat of which is held by
DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by May 2023, and conflicting national standards shall be
withdrawn at the latest by May 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 725-11:2006.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Ma
...
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