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CEN
EN ISO 21068-3:2008

EN ISO 21068-3:2008

Withdrawn

Withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

Chemical analysis of silicon-carbide-containing raw materials and refractory products - Part 3: Determination of nitrogen, oxygen and metallic and oxidic constituents (ISO 21068-3:2008)

Withdrawn date

28-02-2009

Published date

01-08-2008

Publisher

Comite Europeen de Normalisation

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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Determination of nitrogen and oxygen
   4.1 General
   4.2 Combined determination of nitrogen and oxygen
       by an analyser with thermal conductivity (CR)
       and infrared absorption (IR) detection
5 Determination of nitrogen calculated as Si[3]N[4]
   5.1 General
   5.2 Acid decomposition - Titration method
   5.3 Acid decomposition - Photometry method
   5.4 Inert-gas fusion - Thermal conductivity method
   5.5 Determination of total nitrogen
6 Determination of free Iron by Inductively Coupled
   Plasma Atomic Emission Spectrometry (ICP-AES)
   6.1 General
   6.2 Copper sulfate method
   6.3 Bromine/methanol method
7 Determination of free aluminium and free magnesium
   7.1 General
   7.2 Acid decomposition - Inductively coupled plasma atomic
       emission spectroscopy (ICP-AES)
   7.3 Acid decomposition - Flame Atomic Absorption
       Spectrometry (FAAS)
   7.4 Hydrogen generating method
8 Analysis of oxides
   8.1 General
   8.2 Wet methods
   8.3 Flame atomic absorption and/or inductively coupled
       plasma atomic emission spectrometer
   8.4 XRF fusion method after ignition of the sample
   8.5 Determination of silicon(IV) oxide, aluminium oxide,
       iron(III) oxide, titanium(IV) oxide, calcium oxide,
       magnesium oxide, sodium oxide, potassium oxide,
       chromium(III) oxide, zirconium oxide, and boron oxide
9 Expression of results
10 Test report
Annex A (informative) Statistical results obtained with
        analysis of refractories containing carbon
        and/or silicon carbide
Bibliography

ISO 21068-3:2008 specifies methods for the determination of total nitrogen and nitrogen calculated as silicon nitride, total oxygen, and free metallic and oxidic components in silicon carbide raw materials and refractory products. It applies only to silicon carbide materials that are not bonded with nitrogen. Nitride-bonded silicon carbide refractories are covered in EN 12698-1.

Committee
CEN/TC 187
DocumentType
Standard
PublisherName
Comite Europeen de Normalisation
Status
Withdrawn

ISO 10081-1:2003 Classification of dense shaped refractory products — Part 1: Alumina-silica
ISO 21587-1:2007 Chemical analysis of aluminosilicate refractory products (alternative to the X-ray fluorescence method) Part 1: Apparatus, reagents, dissolution and gravimetric silica
ISO 21079-3:2008 Chemical analysis of refractories containing alumina, zirconia, and silica — Refractories containing 5 percent to 45 percent of ZrO2 (alternative to the X-ray fluorescence method) — Part 3: Flame atomic absorption spectrophotometry (FAAS) and inductively coupled plasma emission spectrometry (ICP -AES)
ISO 21587-3:2007 Chemical analysis of aluminosilicate refractory products (alternative to the X-ray fluorescence method) Part 3: Inductively coupled plasma and atomic absorption spectrometry methods
ISO 12677:2011 Chemical analysis of refractory products by X-ray fluorescence (XRF) Fused cast-bead method
EN 12698-1:2007 Chemical analysis of nitride bonded silicon carbide refractories - Part 1: Chemical methods
ISO 21079-2:2008 Chemical analysis of refractories containing alumina, zirconia, and silica — Refractories containing 5 percent to 45 percent of ZrO2 (alternative to the X-ray fluorescence method) — Part 2: Wet chemical analysis
ISO 21587-2:2007 Chemical analysis of aluminosilicate refractory products (alternative to the X-ray fluorescence method) Part 2: Wet chemical analysis
ISO 10081-4:2014 Classification of dense shaped refractory products — Part 4: Special products
ISO 10081-3:2003 Classification of dense shaped refractory products — Part 3: Basic products containing from 7 % to 50 % residual carbon
ISO 1927:1984 Prepared unshaped refractory materials (dense and insulating) Classification
ISO 10060:1993 Dense, shaped refractory products — Test methods for products containing carbon
ISO 21068-2:2008 Chemical analysis of silicon-carbide-containing raw materials and refractory products — Part 2: Determination of loss on ignition, total carbon, free carbon and silicon carbide, total and free silica and total and free silicon
ISO 21068-1:2008 Chemical analysis of silicon-carbide-containing raw materials and refractory products — Part 1: General information and sample preparation
ISO 10081-2:2003 Classification of dense shaped refractory products — Part 2: Basic products containing less than 7 % residual carbon
EN 725-3:2007 Advanced technical ceramics - Methods of test for ceramic powders - Part 3: Determination of the oxygen content of non-oxides by thermal extraction with a carrier gas
ISO 26845:2008 Chemical analysis of refractories General requirements for wet chemical analysis, atomic absorption spectrometry (AAS) and inductively coupled plasma atomic emission spectrometry (ICP-AES) methods
ISO 21079-1:2008 Chemical analysis of refractories containing alumina, zirconia and silica — Refractories containing 5 percent to 45 percent of ZrO2 (alternative to the X-ray fluorescence method) — Part 1: Apparatus, reagents and dissolution

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