EN ISO 19628:2024

Fine ceramics (advanced ceramics, advanced technical ceramics) - Thermophysical properties of ceramic composites - Determination of specific heat capacity (ISO 19628:2024)

This document specifies two methods for the determination of the specific heat capacity of ceramic matrix composites with continuous reinforcements (1D, 2D, 3D).
Unidirectional (1D), bi-directional (2D) and tridirectional (XD, with 2 < X ≤ 3).
The two methods are:
—    method A: drop calorimetry;
—    method B: differential scanning calorimetry.
The two methods are applicable from ambient temperature up to a maximum temperature that is method dependent: method A can be used up to 3 000 K, while method B is limited to 1 900 K.

Hochleistungskeramik - Thermophysikalische Eigenschaften von keramischen Verbundwerkstoffen - Bestimmung der spezifischen Wärmekapazität (ISO 19628:2024)

Céramiques techniques - Propriétés thermophysiques des composites céramiques - Détermination de la capacité thermique massique (ISO 19628:2024)

L'ISO 19628:2017 décrit deux méthodes pour la détermination de la capacité thermique spécifique des composites à matrice céramique à renforts continus (1D, 2D, 3D).
Les matrices sont à renforts unidirectionnels (1D), bidirectionnels (2D) et tridirectionnels (XD, avec 2 < x ≤ 3).
Les deux méthodes sont:
- méthode A: calorimétrie à chute;
- méthode B: calorimétrie différentielle à balayage.
Elles sont applicables depuis la température ambiante jusqu'à une température maximale qui dépend de la méthode: la méthode A peut être utilisée jusqu'à 2 250 K, tandis que la méthode B est limitée à 1 900 K.
NOTE La méthode A se limite à la détermination d'une valeur moyenne de la capacité thermique spécifique dans un intervalle de température donné et peut conduire à une dispersion importante des résultats.

Fina keramika (sodobna keramika, sodobna tehnična keramika) - Termofizikalne lastnosti keramičnih kompozitov - Ugotavljanje specifične toplotne kapacitete (ISO/DIS 19628:2024)

General Information

• Status: Published
• Publication Date: 12-Nov-2024
• ICS: 81.060.30 - Advanced ceramics
• Technical Committee: CEN/TC 184 - Advanced technical ceramics
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 13-Nov-2024
• Completion Date: 13-Nov-2024
• Ref Project: oSIST prEN ISO 19628:2024 - Fine ceramics (advanced ceramics, advanced technical ceramics) - Thermophysical properties of ceramic composites - Determination of specific heat capacity (ISO/DIS 19628:2024)

Relations

• Replaces: EN ISO 19628:2021 - Fine ceramics (advanced ceramics, advanced technical ceramics) - Thermophysical properties of ceramic composites - Determination of specific heat capacity (ISO 19628:2017)
• Effective Date: 21-Jun-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2024
Fina keramika (sodobna keramika, sodobna tehnična keramika) - Termofizikalne
lastnosti keramičnih kompozitov - Ugotavljanje specifične toplotne kapacitete
(ISO/DIS 19628:2024)
Fine ceramics (advanced ceramics, advanced technical ceramics) - Thermophysical
properties of ceramic composites - Determination of specific heat capacity (ISO/DIS
19628:2024)
Hochleistungskeramik - Thermophysikalische Eigenschaften von keramischen
Verbundwerkstoffen - Bestimmung der spezifischen Wärmekapazität (ISO/DIS
19628:2024)
Céramiques techniques - Propriétés thermophysiques des composites céramiques -
Détermination de la capacité thermique massique (ISO/DIS 19628:2024)
Ta slovenski standard je istoveten z: prEN ISO 19628
ICS:
81.060.30 Sodobna keramika Advanced ceramics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 19628
ISO/TC 206
Fine ceramics (advanced
Secretariat: JISC
ceramics, advanced technical
Voting begins on:
ceramics) — Thermophysical
2024-03-28
properties of ceramic composites
Voting terminates on:
— Determination of specific heat
2024-06-20
capacity
Céramiques techniques — Propriétés thermophysiques des
composites céramiques — Détermination de la capacité
thermique massique
ICS: 81.060.30
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Reference number
ISO/DIS 19628:2024(en)
DRAFT
ISO/DIS 19628:2024(en)
International
Standard
ISO/DIS 19628
ISO/TC 206
Fine ceramics (advanced
Secretariat: JISC
ceramics, advanced technical
Voting begins on:
ceramics) — Thermophysical
properties of ceramic composites
Voting terminates on:
— Determination of specific heat
capacity
Céramiques techniques — Propriétés thermophysiques des
composites céramiques — Détermination de la capacité
thermique massique
ICS: 81.060.30
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2024
TECHNOLOGICAL, COMMERCIAL AND
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Published in Switzerland Reference number
ISO/DIS 19628:2024(en)
ii
ISO/DIS 19628:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Method A – drop calorimetry . 2
4.1 Principle .2
4.2 Apparatus .2
4.3 Standard reference materials .3
4.4 Containers .3
4.5 Test specimens.3
4.6 Calibration of the calorimeter . .3
4.6.1 General .3
4.6.2 Electrical calibration .3
4.6.3 Calibration using standard reference material .4
4.7 Test procedures .4
4.7.1 General .4
4.7.2 Test without a container .4
4.7.3 Test with a container .5
4.7.4 Description of test .5
4.8 Calculations .6
4.8.1 General .6
4.8.2 Determination of the calorimetric calibration factor .6
4.8.3 Determination of mean specific heat capacity C .6
p
4.8.4 Determination of the specific heat capacity C .7
p
5 Method B – differential scanning calorimetry . 7
5.1 Principle .7
5.1.1 General .7
5.1.2 Stepwise heating method .8
5.1.3 Continuous heating method .8
5.2 Apparatus .9
5.3 Standard reference materials, SRM .9
5.4 Test specimens.9
5.5 Temperature calibration .9
5.6 Test procedure for the determination of C .9
p
5.6.1 General .9
5.6.2 Method 1: Measurements requiring the knowledge of the K factor .10
5.6.3 Method 2: measurements requiring the use of a reference standard material
(SRM) . 12
5.7 Calculation of results . 15
5.7.1 Method requiring the knowledge of the K factor . 15
5.7.2 Method using an SRM.17
6 Test report .18
Annex A (normative) Drop calorimetry – determination of the calibration factor using standard
reference material . 19
Annex B (informative) Standard reference material .21
Annex C (informative) Materials for calorimeter calibrations .26
Bibliography .27

iii
ISO/DIS 19628:2024(en)
Foreword
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Attention is drawn to the possibility that some of the elements of this doc
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