Ceramics-Silikáty 52 (2) 90-94 (2008)

ANISOTROPIC MECHANICAL PROPERTIES OF TEXTURED QUARTZ PORCELAIN

I. Štubňa, A. Lintnerová, L. Vozár

Textured samples prepared from 50 % kaolin, 25 % feldspar and 25 % quartz were fired at selected temperatures from 200 to 1320°C. Young's modulus and flexural strength were measured. The results showed the dependence of mechanical properties on the orientation of the kaolinite crystals in the sample. Young's modulus is higher along the basal planes of the kaolinite crystals. Flexural strength had lower values if a force affected the sample collinearly with basal planes of the kaolinite crystals. Both mechanical strength and Young's modulus showed that the texture effects persisted even after firing.

Keywords: Porcelain electroceramics, Technological texture, Young's modulus, Flexural strength