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EN ISO 21814:2022 Edition 11/2022
Fine ceramics (advanced ceramics, advanced technical ceramics) - Methods for chemical analysis of aluminium nitride powders (ISO 21814:2019)
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Abstract

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.

Status

Draft - Active

Origin

Technical Committee :
CEN/TC 184 : Advanced technical ceramics

Implementation

start of the vote on the project    28/07/2022   date of ratification (dor)    21/11/2022
end of the vote on the project    20/10/2022   date of anouncement (doa)    28/02/2023
start of the vote on the final project    01/09/2023   date of publication (dop)    31/05/2023
end of the vote on the final project    27/10/2023   date of withdrawal (dow)    31/05/2023


Publication Official Journal
of the Grand-Duchy of Luxembourg
Reference

Relations

Relations to older standards
ILNAS-EN 725-4:2006

International Classification for Standards (ICS codes) :

81.060.30 : Advanced ceramics

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