EN ISO 21068-3:2008
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.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)
28-02-2009
01-08-2008
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Withdrawn
|
| Standards | Relationship |
| UNI EN ISO 21068-3 : 2008 | Identical |
| NS EN ISO 21068-3 : 1ED 2008 | Identical |
| BS EN ISO 21068-3:2008 | Identical |
| I.S. EN ISO 21068-3:2008 | Identical |
| DIN EN ISO 21068-3:2008-12 | Identical |
| PN EN ISO 21068-3 : 2010 | Identical |
| ISO 21068-3:2008 | Identical |
| NF EN ISO 21068-3 : 2008 | Identical |
| NBN EN ISO 21068-3 : 2008 | Identical |
| NEN EN ISO 21068-3 : 2008 | Identical |
| SN EN ISO 21068-3 : 2008 | Identical |
| UNE-EN ISO 21068-3:2008 | Identical |
| DS EN ISO 21068-3 : 2008 | Identical |
| PNE-prEN ISO 21068-3 | Identical |
| 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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