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  • BSI
    BS EN ISO 21068-1:2024 Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon - General information, terminology and sample preparation
    Edition: 2024
    $313.97
    / user per year

Description of BS EN ISO 21068-1:2024 2024

This document gives definitions and specifies techniques for the preparation of samples for the chemical analysis of silicon-carbide-containing raw materials and refractory products including: a)       SiC raw materials; b)       graphite brick containing silicon carbide; c)        silicon carbide brick (includes the bricks containing silicon nitride, silicon oxynitride, sialon); d)       refractories containing carbon and/or silicon carbide mixed with clay; e)       refractories containing carbon and/or silicon carbide mixed with silica (and fused silica); f)         refractories containing carbon and/or silicon carbide mixed with high alumina material; g)       refractories containing carbon and/or silicon carbide mixed with magnesia (and dolomite); h)       refractories containing carbon and/or silicon carbide mixed with chrome mineral or magnesia-chrome materials; i)         refractories containing carbon and/or silicon carbide except those described in a) to h) above. The items of analysis described in ISO 21068-2, ISO 21068-3 and ISO 21068-4 are as follows: —     loss on drying (LOD); —     loss on ignition (LOI); —     total carbon, Ctotal; —     free carbon, Cfree; —     silicon carbide, SiC; —     free silicon (Sifree); —     free aluminium (Alfree); —     free magnesium (Mgfree); —     free iron (Fefree); —     silicon(IV) dioxide (SiO2); —     aluminium(III) oxide (Al2O3); —     iron(III) oxide (Fe2O3); —     titanium(IV) oxide (TiO2); —     calcium oxide (CaO); —     magnesium oxide (MgO); —     sodium oxide (Na2O); —      potassium oxide (K2O); —     chromium(III) oxide (Cr2O3); —     zirconium(IV) oxide (ZrO2); —     boron oxide (total boron calculated as B2O3); —     nitrogen; —     oxygen; —     nitrides (undifferentiated: Si3N4, AlN, BN, sialon, oxy-nitrides, etc.); —      mineralogical phases (XRD-methods).

Standard NumberBS EN ISO 21068-1:2024
TitleChemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon - General information, terminology and sample preparation
StatusDefinitive
Publication Date2024-05-16
ReplacesBS EN ISO 21068-1:2008
Identical National Standard OfEN ISO 21068-1, ISO 21068-1:2024
DescriptorsDetermination of content, Raw materials, Carbides, Refractories, Carbon, Refractory materials, Chemical analysis and testing, Silicon inorganic compounds, Specimen preparation
ICS81.080 Refractories, 81.080 Refractories
CommitteeRPI/1
ISBN978 0 539 20081 2
PublisherBSI
Pages16

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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