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BS EN ISO 21068-3:2024

BS EN ISO 21068-3:2024

$167.15

Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon – Determination of nitrogen, oxygen and metallic and oxidic constituents

Published By Publication Date Number of Pages
BSI 2024 34
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This document specifies analytical techniques for the determination of total nitrogen and nitrogen calculated as silicon nitride, total oxygen, and metallic and oxidic components in silicon carbide raw materials and refractory products.

PDF Catalog

PDF Pages PDF Title
2 undefined
10 4.1 General
4.2 Combined determination of nitrogen and oxygen by an analyser with thermal conductivity (TC) and infrared (IR) absorption detection
4.2.1 Principle
11 4.2.2 Reagents
4.2.3 Apparatus
4.2.4 Nickel pre-treatment
12 4.2.5 Calibration
4.2.6 Procedure
13 4.2.7 Precision
4.3 Determination of total nitrogen content by fusion decomposition
4.3.1 General
4.3.2 Principle
4.3.3 Reagents
4.3.4 Apparatus
14 4.3.5 Sample preparation
4.3.6 Procedure
15 4.3.7 Calculation and expression of results
16 4.3.8 Precision
4.4 Determination of total nitrogen content by Kjeldahl distillation
4.4.1 Principle
4.4.2 Reagents
17 4.4.3 Apparatus
4.4.4 Sample preparation
4.4.5 Procedure
18 4.4.6 Calculation and expression of results
4.4.7 Precision
4.5 Calculation of Si3N4 content using total nitrogen content
4.5.1 Calculation
5.1 General
19 5.2 Principle
5.3 Apparatus
5.4 Reagents
5.5 Sample preparation
5.6 Procedure
5.7 Measurement
20 5.8 Calculation
6.1 Principle
6.2 Reagents
6.3 Apparatus
21 6.4 Sample preparation
6.5 Procedure
6.6 Calculation and expression of results
22 7.1 General
7.2 Reagents
7.3 Procedure
7.4 Measurement
7.5 Precision
23 8.1 General
8.1.1 Alkaline melt fusion
24 8.1.2 Acid pressure decomposition
26 8.2 Determination of impurities by XRF (fused bead method)
8.3 Determination of impurities by DCArc-OES (direct solid sampling method)

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BS EN ISO 21068-3:2024
$167.15