SFS-EN ISO 21068-2:en

Soveltamisala

Suomenkielistä soveltamisalaa ei ole saatavissa.

ISO 21068-2:2008 specifies analytical techniques for the determination of change in mass by thermal treatment at specified temperatures, and methods for the determination of the total carbon content, free carbon, silicon carbide, silicon, total silica and free silica content of silicon-carbide-containing raw materials and refractory products.

Tämän julkaisun valmistelusta Suomessa vastaa Rakennustuoteteollisuus RTT ry, puh. 09 12 991 (vaihde).

Sisällysluettelo

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Determination of change in mass

4.1 General
4.2 Determination of the loss on drying at 250 °C (LOD250) gravimetric method
4.3 Determination of the loss on calcination in argon (LOIAr)
4.4 Determination of the change in mass by heat pretreatment in air
4.5 Determination of the change in mass at 750 °C (LOI750)
4.6 Determination of loss on ignition at 850 °C (LOI850)
4.7 Determination of loss on ignition at 1 050 °C (LOI1 050)

5 Determination of the total carbon content

5.1 General
5.2 Combustion techniques
5.3 Detection techniques
5.4 Detection methods

6 Determination of free carbon content

6.1 General
6.2 Sample decomposition by combustion
6.3 Detection techniques
6.4 Direct detection methods
6.5 Indirect detection methods
6.6 Direct determination of free carbon by wet oxidation

7 Determination of silicon carbide content, SiC

7.1 General
7.2 Determination of silicon carbide, SiC, by indirect quantitative method
7.3 Determination of silicon carbide, SiC, by direct quantitative method
7.4 Determination of silicon carbide, SiC, by ignition method at 750 °C
7.5 Determination of silicon carbide, SiC, by chemical method

8 Determination of total silicon content via silica

8.1 Principle
8.2 Reagents
8.3 Apparatus
8.4 Procedure
8.5 Blank test
8.6 Calculation

9 Determination of free silicon content

9.1 Principle
9.2 Pretreatment with hydrochloric acid
9.3 Silicon determination by hydrogen evolution
9.4 Silicon determination by silver displacement

10 Determination of silica content, SiO2

10.1 General
10.2 Determination of free and/or combined silica content, SiO2
10.3 Determination of free silica, SiO2
10.4 Determination of surface silicon dioxide, SiO2

11 Expression of results
12 Test report

Annex A Examples of CRMs for calibration of carbon analyser (informative)

Bibliography

Näytä kaikki

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Determination of change in mass

4.1 General
4.2 Determination of the loss on drying at 250 °C (LOD250) gravimetric method
4.3 Determination of the loss on calcination in argon (LOIAr)
4.4 Determination of the change in mass by heat pretreatment in air
4.5 Determination of the change in mass at 750 °C (LOI750)
4.6 Determination of loss on ignition at 850 °C (LOI850)
4.7 Determination of loss on ignition at 1 050 °C (LOI1 050)

5 Determination of the total carbon content

5.1 General
5.2 Combustion techniques
5.3 Detection techniques
5.4 Detection methods

6 Determination of free carbon content

6.1 General
6.2 Sample decomposition by combustion
6.3 Detection techniques
6.4 Direct detection methods
6.5 Indirect detection methods
6.6 Direct determination of free carbon by wet oxidation

7 Determination of silicon carbide content, SiC

7.1 General
7.2 Determination of silicon carbide, SiC, by indirect quantitative method
7.3 Determination of silicon carbide, SiC, by direct quantitative method
7.4 Determination of silicon carbide, SiC, by ignition method at 750 °C
7.5 Determination of silicon carbide, SiC, by chemical method

8 Determination of total silicon content via silica

8.1 Principle
8.2 Reagents
8.3 Apparatus
8.4 Procedure
8.5 Blank test
8.6 Calculation

9 Determination of free silicon content

9.1 Principle
9.2 Pretreatment with hydrochloric acid
9.3 Silicon determination by hydrogen evolution
9.4 Silicon determination by silver displacement

10 Determination of silica content, SiO2

10.1 General
10.2 Determination of free and/or combined silica content, SiO2
10.3 Determination of free silica, SiO2
10.4 Determination of surface silicon dioxide, SiO2

11 Expression of results
12 Test report

Annex A Examples of CRMs for calibration of carbon analyser (informative)

Bibliography

Tuoteryhmä(t)

81.080 Tulenkestävät aineet »

Sidokset

Velvoittavat viittaukset

EN 12698-1:2007 Chemical analysis of nitride bonded silicon carbide refractories - Part 1: Chemical methods
ISO 10060:1993 Dense, shaped refractory products -- Test methods for products containing carbon
ISO 21068-1:2008 Chemical analysis of silicon-carbide-containing raw materials and refractory products -- Part 1: General information and sample preparation

Tekninen komitea

CEN/TC 187 Refractory products and materials »

Vahvistuspäivä

24.11.2008

Julkaisupäivä

12.12.2008

Painos

1

Sivumäärä

52

Julkaisun kieli

englanti