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EVS-EN 725-1:2000

Advanced technical ceramics - Methods of test for ceramic powders - Part 1: Determination of impurities in alumina

General information
Withdrawn from 05.12.2007
Base Documents
EN 725-1:1997
Directives or regulations
None
Standard history
Status
Date
Type
Name
05.12.2007
Main
This part of EN 725 specifies methods for the determination of elements of sodium, potassium, iron, silicon, calcium and magnesium present as impurities in alumina using atomic absorption (AAS) or inductively coupled plasma (ICP) instruments. For each element present as impurities, the methods are applicable to the following ranges, calculated as oxides: Sodium oxide: 20 ppm to 6000 ppm;Potassium oxide: 20 ppm to 100 ppm; Ferric oxide: 20 ppm to 300 ppm; Silica: 50 ppm to 2000 ppm; Calcium oxide: 20 ppm to 700 ppm; Magnesium oxide: 5 ppm to 1000 ppm.
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