ISO 21813:2019 PDF

Scope: This document specifies methods for the chemical analysis of fine high purity barium titanate powders used as the raw material for fine ceramics. This document stipulates the determination methods of the barium, titanium, aluminium, cadmium, calcium, cobalt, dysprosium, iron, lead, magnesium, manganese, nickel, niobium, potassium, silicon, sodium, strontium, vanadium, zirconium, carbon, oxygen and nitrogen contents in high purity barium titanate powders. The barium and titanium contents, the major elements, are determined by using an acid decomposition-gravimetric method or an acid decomposition-inductively coupled plasma- optical emission spectrometry (ICP-OES) method. The aluminium, cadmium, calcium, chromium, cobalt, dysprosium, iron, lead, magnesium, manganese, nickel, niobium, potassium, silicon, strontium, vanadium and zirconium contents are simultaneously determined via an acid digestion-ICP-OES method. The nitrogen content is determined by using an inert gas fusion-thermal conductivity method, while that of oxygen is determined via an inert gas fusion-IR absorption spectrometry method. Finally, the carbon content is determined using a combustion-IR absorption spectrometry method or a combustion-conductometry method.

ISO 21813:2019 Referenced Document

ISO 3696 Water for analytical laboratory use; Specification and test methods
ISO 6353-1 Reagents for chemical analysis; Part 1 : General test methods
ISO 6353-2 Reagents for chemical analysis — Part 2: Specifications — First series — Addendum 2
ISO 6353-3 Reagents for chemical analysis; Part 3 : Specifications; Second series
ISO 8656-1 Refractory products; sampling of raw materials and unshaped products; part 1: sampling scheme

2019 ISO 21813:2019 Fine ceramics (advanced ceramics, advanced technical ceramics) — Methods for chemical analysis of high purity barium titanate powders