Zirconia Phases by XRD - Test Method - DD ENV 14273:2002

Title

Advanced Technical Ceramics - Ceramic powders - Determination of crystalline phases in zirconia. DD ENV 14273:2002

Overview

Zirconia (ZrO2) occurs in three different polymorphs; cubic, monoclinic and tetragonal. Monoclinic zirconia forms in isolation, however, both cubic and tetragonal need to be ‘stabilised' by addition of small amounts of normally calcium, magnesium or yttrium to give a stable structure.
The method uses X-ray diffraction (XRD) to identify and quantify the three different polymorphs in the powder and can determine the amount of stabiliser in the phases. It should be noted that grinding a sample can modify the proportion of polymorphs.

Applications and Benefits

Provide accurate measurement of the polymorphs present as material properties are very dependent upon the mineralogy and thermal processing of the powder.

Form of Results

Results are provided in the form of weight proportions of the component polymorphs.

Related Tests

Analysis of materials by XRF using ISO 12677.
Examination of microstructure of zirconia and other materials.
Grain size of fired ceramics BS EN 623:3 and ISO 13356.
Particle size.

Similar Tests for Other Applications

Mineralogical characterisation by XRD, enables full mineralogical characterisation of solid materials.

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