BS EN ISO 21068-2:2008
$198.66
Chemical analysis of silicon-carbide-containing raw materials and refractory products – Determination of loss on ignition, total carbon, free carbon and silicon carbide, total and free silica and total and free silicon
| Published By | Publication Date | Number of Pages |
| BSI | 2008 | 58 |
This part of ISO 21068 specifies analytical techniques for the determination of change in mass by thermal treatment at specified temperatures, and methods for the determination of the total carbon content, free carbon, silicon carbide, silicon, total silica and free silica content of silicon-carbide-containing raw materials and refractory products.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 9 | Scope Normative references Terms and definitions |
| 10 | Determination of change in mass General Determination of the loss on drying at 250 °C (LOD250) gravi Principle Apparatus Procedure |
| 11 | Calculation Determination of the loss on calcination in argon (LOIAr) Principle Apparatus |
| 12 | Reagents Procedure Check of test assembly, blank value determination Determination |
| 13 | Calculation Determination of the change in mass by heat pretreatment in |
| 14 | Determination of the change in mass at 750 °C (LOI750) Principle Apparatus Procedure Calculation |
| 15 | Determination of loss on ignition at 850 °C (LOI850) Apparatus Platinum dish, platinum or porcelain (e.g. Type B 20 ml). Procedure Calculation Determination of loss on ignition at 1 050 °C (LOI1 050) Principle Apparatus Crucible, platinum or porcelain (e.g. Type B 20 ml). Procedure |
| 16 | Calculation Determination of the total carbon content General |
| 17 | Combustion techniques General Resistance furnace in oxygen and lead borate as decomposing Principle Reagents Apparatus |
| 18 | Setting up of test assembly Procedure for RF combustion with lead borate Resistance furnace in oxygen and tin powder as decomposing a Principle Reagents Apparatus |
| 19 | Setting up of test assembly Procedure of RF combustion with tin powder Induction furnace (IF) in oxygen and metallic powder as deco Principle Reagents |
| 20 | Apparatus Set-up of test assembly Procedure of induction furnace (IF) combustion Detection techniques Coulometry |
| 21 | Gravimetry using resistance furnace |
| 22 | Gravimetry using high-frequency induction furnace |
| 23 | Conductometry Infrared (IR) method and resistance furnace (RF) combustion |
| 24 | Thermal conductivity (TC) method and induction furnace (IF) |
| 25 | Detection methods Resistance furnace method with coulometric detection of the Combustion and detection Reagents Apparatus Setting up the test assembly Check of test assembly, blank value determination Procedure |
| 26 | Calculation Resistance/induction furnace method with gravimetric detecti Combustion and detection Reagents Apparatus |
| 27 | Setting up the test assembly Check of test assembly, blank value determination Procedure |
| 28 | Calculation Resistance furnace method with conductometric detection of r Combustion and detection Reagents Apparatus Setting up the test assembly Check of test assembly, blank determination Procedure |
| 29 | Calculation Resistance/induction furnace method with detection of the re Combustion and detection Reagents Apparatus Setting up the test assembly Check of test assembly, blank value determination Procedure |
| 30 | Calculation Induction furnace combustion — Thermal conductivity method ( Combustion and detection Materials and reagents Apparatus Mass of test portion Procedure |
| 31 | Blank test Calculation of calibration coefficient Calculation |
| 32 | Determination of free carbon content General Sample decomposition by combustion General Detection techniques Direct detection methods Principle Determination of free carbon by coulometric method at 850 °C Reagents Apparatus Set-up of test assembly |
| 33 | Check of test assembly, blank value determination Procedure Calculation Determination of free carbon by gravimetric method at 750°C Reagents |
| 34 | Apparatus Set-up of test assembly Check of test assembly, blank value determination Procedure Calculation |
| 35 | Determination of free carbon by conductometric method at 850 Reagents Apparatus Set-up of test assembly, blank value determination Procedure Calculation Determination of free carbon by IR or TC method at 850 °C Principle Reagents Apparatus |
| 36 | Mass of test portion Procedure Blank test Calculation of calibration coefficient Calculation |
| 37 | Indirect detection methods Principle |
| 38 | Indirect determination by change in mass during calcination Reagents Apparatus Procedure Determining the change in mass on calcination in air Determining the total carbon content of the residue on ignit Determining the total carbon content of the starting materia Calculation |
| 39 | Precision Indirect determination by weighing back the combustion boat Reagents Apparatus |
| 40 | Procedure Calculation Determination of free carbon by calculation |
| 41 | Direct determination of free carbon by wet oxidation Principle Determination of silicon carbide content, SiC General |
| 42 | Determination of silicon carbide, SiC, by indirect quantitat Principle Calculation Determination of silicon carbide, SiC, by direct quantitativ Principle Reagents Apparatus Test portion |
| 43 | Procedure Blank test Calculation of calibration coefficient Calculation Determination of silicon carbide, SiC, by ignition method at Principle |
| 44 | Ash production Determination of carbon in ash Calculation Determination of silicon carbide, SiC, by chemical method |
| 45 | Principle Reagents Apparatus Procedure |
| 46 | Calculation Determination of total silicon content via silica Principle Reagents Apparatus |
| 47 | Procedure Blank test |
| 48 | Calculation Determination of free silicon content Principle Pretreatment with hydrochloric acid Silicon determination by hydrogen evolution Principle Reagents |
| 49 | Apparatus General Mass of test portion |
| 50 | Procedure |
| 51 | Blank test Calculation Silicon determination by silver displacement Principle Pretreatment |
| 52 | Reagents Apparatus Procedure Determination of wSi free by silver displacement Reagents Apparatus Procedure |
| 53 | Blank test Calculation Determination of silica content, SiO2 General Determination of free and/or combined silica content, SiO2 |
| 54 | Determination of free silica, SiO2 Determination of surface silicon dioxide, SiO2 Expression of results Test report |
