BS ISO 21814:2019
$167.15
Fine ceramics (advanced ceramics, advanced technical ceramics). Methods for chemical analysis of aluminium nitride powders
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 44 |
This document specifies methods for the chemical analysis of fine aluminium nitride powders used as the raw material for fine ceramics.
This document stipulates the determination methods of the aluminium, total nitrogen, boron, calcium, copper, iron, magnesium, manganese, molybdenum, nickel, potassium, silicon, sodium, titanium, tungsten, vanadium, zinc, zirconium, carbon, chlorine, fluorine, and oxygen contents in aluminium nitride powders. The aluminium content is determined by using either an acid pressure decomposition-CyDTA-zinc back titration method or an acid digestion-inductively coupled plasma-optical emission spectrometry (ICP-OES) method. The total nitrogen content is determined by using an acid pressure decomposition-distillation separation-acidimetric titration method, a direct decomposition-distillation separation-acidimetric titration method, or an inert gas fusion-thermal conductivity method. The boron, calcium, copper, iron, magnesium, manganese, molybdenum, nickel, potassium, silicon, sodium, titanium, tungsten, vanadium and zinc contents are determined by using an acid digestion-ICP-OES method or an acid pressure decomposition-ICP-OES method. The sodium and potassium contents are determined via an acid pressure decomposition-flame emission method or an acid pressure decomposition-atomic absorption spectrometry method. The oxygen content is determined by using an inert gas fusion-IR absorption spectrometry method, while that of carbon is determined via a combustion-IR absorption spectrometry method or a combustion-conductometry method. The chlorine and fluorine contents are determined by using a pyrohydrolysation method followed by ion chromatography or spectrophotometry.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 8 | Foreword |
| 9 | 1 Scope 2 Normative references |
| 10 | 3 Terms and definitions 4 Analytes and ranges 5 Preparation of the test sample 5.1 General |
| 11 | 5.2 Sampling 5.3 Drying 5.4 Weighing 6 Reporting the analytical values 6.1 Number of analyses 6.2 Blank test 6.3 Evaluation of the analytical values 6.4 Expression of the analytical values |
| 12 | 7 Determination of the aluminium content 7.1 Classification of the determination methods 7.2 Acid decomposition-ICP-OES method 7.2.1 Principle 7.2.2 Reagents 7.2.3 Apparatus and instruments |
| 13 | 7.2.4 Procedure 7.2.5 Blank test 7.2.6 Drawing of the calibration curve 7.2.7 Calculation 7.3 Acid pressure decomposition-CyDTA-zinc back titration method 7.3.1 Principle |
| 14 | 7.3.2 Reagents 7.3.3 Apparatus and instruments |
| 16 | 7.3.4 Procedure 7.3.5 Blank test 7.3.6 Calculation 8 Determination of the total nitrogen content 8.1 Classification of the determination methods |
| 17 | 8.2 Acid pressure decomposition-distillation separation-acidimetric titration method 8.2.1 Principle 8.2.2 Reagents |
| 18 | 8.2.3 Apparatus |
| 19 | 8.2.4 Procedure 8.2.5 Recovery measurement |
| 20 | 8.2.6 Calculation 8.3 Direct decomposition-distillation separation-acidimetric titration method 8.3.1 Principle 8.3.2 Reagents 8.3.3 Apparatus 8.3.4 Procedure 8.3.5 Recovery measurement 8.3.6 Calculation |
| 21 | 8.4 Inert gas fusion-thermal conductivity method 8.4.1 Principle 8.4.2 Reagents 8.4.3 Apparatus |
| 22 | 8.4.4 Instrument |
| 23 | 8.4.5 Procedure 8.4.6 Blank test 8.4.7 Calculation of the calibration coefficient |
| 24 | 8.4.8 Calculation 9 Determination of the sodium and potassium contents 9.1 Classification of the determination methods 9.2 Acid pressure decomposition-flame emission method 9.2.1 Principle 9.2.2 Reagents |
| 25 | 9.2.3 Instruments 9.2.4 Procedure 9.2.5 Blank test 9.2.6 Drawing of the calibration curve |
| 26 | 9.2.7 Calculation 9.3 Acid pressure decomposition-atomic absorption spectrometry method 9.3.1 Principle 9.3.2 Reagents 9.3.3 Instruments 9.3.4 Procedure 9.3.5 Blank test 9.3.6 Drawing of the calibration curve 9.3.7 Calculation |
| 27 | 10 Determination of the trace element contents 10.1 Classification of the determination methods 10.2 Acid decomposition-ICP-OES method 10.2.1 Principle 10.2.2 Reagents |
| 28 | 10.2.3 Apparatus and instruments 10.2.4 Procedure 10.2.5 Blank test |
| 29 | 10.2.6 Drawing of the calibration curve 10.2.7 Calculation 10.3 Acid pressure decomposition-ICP-OES method 10.3.1 General 10.3.2 Reagents 10.3.3 Apparatus and instruments 10.3.4 Procedure 10.3.5 Blank test 10.3.6 Drawing of the calibration curve 10.3.7 Calculation 11 Determination of the oxygen content 11.1 Principle |
| 30 | 11.2 Reagents 11.3 Apparatus 11.4 Instruments 11.5 Procedure 11.6 Blank test 11.7 Calculation of the calibration coefficient |
| 31 | 11.8 Calculation 12 Determination of the carbon content 12.1 Classification of the determination methods 12.2 Combustion (resistance furnace)-IR absorption spectrometry 12.2.1 Principle 12.2.2 Reagents 12.2.3 Apparatus |
| 32 | 12.2.4 Instrument |
| 33 | 12.2.5 Procedure 12.2.6 Blank test 12.2.7 Calculation of the calibration coefficient |
| 34 | 12.2.8 Calculation 12.3 Combustion (radio frequency heating furnace)-thermal conductometry 12.3.1 Principle 12.3.2 Reagents 12.3.3 Apparatus 12.3.4 Instrument |
| 35 | 12.3.5 Procedure |
| 36 | 12.3.6 Blank test 12.3.7 Calculation of the calibration coefficient 12.3.8 Calculation 12.4 Combustion (radio frequency heating furnace)-IR absorption spectrometry 12.4.1 Principle 12.4.2 Reagents 12.4.3 Apparatus 12.4.4 Instrument |
| 37 | 12.4.5 Procedure |
| 38 | 12.4.6 Blank test 12.4.7 Calculation of the calibration coefficient 12.4.8 Calculation 13 Determination of the fluorine and chlorine contents 13.1 Principle 13.2 Reagents 13.2.3 Standard fluoride solution (F 1 mg/ml). 13.2.8 Acetone. 13.2.9 Mercury (II) thiocyanate solution [0,3 g in 100 ml of 95 % (volume fraction) ethanol]. 13.2.10 Ammonium iron (II) sulfate solution [6 g in 100 ml of nitric acid (4+9)]. |
| 39 | 13.3 Apparatus and instruments 13.3.1 Pyrohydrolysis apparatus. |
| 40 | 13.4 Procedure 13.4.1 Extraction of fluorine and chlorine from the sample 13.4.2 Determination of the fluorine and chlorine contents 13.5 Blank test |
| 41 | 13.6 Drawing of the calibration curve 13.7 Calculation 14 Test report |
| 42 | Annex A (informative) Analytical results obtained from the round robin test |
| 43 | Bibliography |
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ISO 21814:2019
Fine ceramics (advanced ceramics, advanced technical ceramics) — Methods for chemical analysis of aluminium nitride…
