1 Scope
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.<...
BS EN ISO 21814:2022 history
0000 BS EN ISO 21814:2022(2023)
2023BS EN ISO 21814:2022 Fine ceramics (advanced ceramics, advanced technical ceramics). Methods for chemical analysis of aluminium nitride powders