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BS ISO 9286:2021

BS ISO 9286:2021

$142.49

Abrasive grains and crude. Chemical analysis of silicon carbide

Published By Publication Date Number of Pages
BSI 2021 30
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This document specifies the chemical analysis of silicon-carbide-based abrasive grains and crudes. It is applicable for the determination of the surface impurities of abrasives grains and the determination of the SiC content of crushed crude when the silicon carbide content is greater than 95 % (mass fraction).

PDF Catalog

PDF Pages PDF Title
2 National foreword
6 Foreword
9 1 Scope
2 Normative references
3 Terms and definitions
4 Analysis of surface impurities
4.1 General
4.2 Sampling
4.3 Preparation of sample
4.3.1 Fine grains
10 4.3.2 Coarse Grains
4.3.3 Crude
11 4.4 Determination of surface carbon (Csurf/free)
4.4.1 Principle
4.4.2 Detection by gravimetric method
13 4.4.3 Detection by infrared absorption (IR)
14 4.5 Determination of surface silicon dioxide (SiO2surf)
4.5.1 General
4.5.2 Detection by HF/KF dissolving reactions
16 4.5.3 Hydrofluoric acid loss
17 4.5.4 Molybdenum blue spectrophotometry
19 4.6 Determination of surface silicon (Sisurf)
4.6.1 General
20 4.6.2 Hydrogen gas volumetric method
22 4.6.3 Silver displacement method
24 4.6.4 Molybdenum blue spectrophotometry
25 4.7 Determination of loss on acid treatment (LAT)
4.7.1 Principle
4.7.2 Reagents
4.7.3 Apparatus
4.7.4 Procedure
4.7.5 Expression of results
26 4.8 Determination of total carbon (Ctotal)
4.8.1 Principle
4.8.2 Detection by gravimetric method
27 4.8.3 Detection by infrared absorption (IR)
4.9 Determination of surface iron (Fesurf), surface aluminium (Alsurf), surface calcium (Casurf) and surface magnesium (Mgsurf)
4.9.1 Principle
4.9.2 Atomic absorption spectrometry method (AAS)
4.9.3 Induced coupled plasma method (ICP)
28 4.10 Calculation of the content of residual silicon carbide (SiCR)
4.10.1 Residual SiC from LAT
4.10.2 Residual SiC from analysed impurities
4.10.3 Residual SiC from total and free carbon
29 5 Test report

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BS ISO 9286:2021
$142.49