UNI EN ISO 21068-3 : 2008
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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CHEMICAL ANALYSIS OF SILICON-CARBIDE CONTAINING RAW MATERIALS AND REFRACTORY PRODUCTS - PART 3: DETERMINATION OF NITROGEN, OXYGEN AND METALLIC AND OXIDIC CONSTITUENTS
28-08-2024
04-12-2008
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 sulphate 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
Describes 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.
| Committee |
CT 700
|
| DocumentType |
Standard
|
| PublisherName |
Ente Nazionale Italiano di Unificazione (UNI)
|
| Status |
Superseded
|
| SupersededBy |
| Standards | Relationship |
| ISO 21068-3:2008 | Identical |
| EN ISO 21068-3:2008 | 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 10058-3:2008 | Chemical analysis of magnesite and dolomite refractory products (alternative to the X-ray fluorescence method) — Part 3: Flame atomic absorption spectrophotometry (FAAS) and inductively coupled plasma atomic emission spectrometry (ICP-AES) |
| 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 20565-2:2008 | Chemical analysis of chrome-bearing refractory products and chrome-bearing raw materials (alternative to the X-ray fluorescence method) — Part 2: Wet chemical analysis |
| ISO 10058-2:2008 | Chemical analysis of magnesite and dolomite refractory products (alternative to the X-ray fluorescence method) — Part 2: Wet chemical analysis |
| ISO 20565-1:2008 | Chemical analysis of chrome-bearing refractory products and chrome-bearing raw materials (alternative to the X-ray fluorescence method) — Part 1: Apparatus, reagents, dissolution and determination of gravimetric silica |
| ISO 20565-3:2008 | Chemical analysis of chrome-bearing refractory products and chrome-bearing raw materials (alternative to the X-ray fluorescence method) — Part 3: Flame atomic absorption spectrometry (FAAS) and inductively coupled plasma atomic emission spectrometry (ICP-AES) |
| 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 |
| ISO 10058-1:2008 | Chemical analysis of magnesite and dolomite refractory products (alternative to the X-ray fluorescence method) — Part 1: Apparatus, reagents, dissolution and determination of gravimetric silica |
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