Physical and chemical processes in alkali activated ceramics exposed to high temperatures


Provider: GA ČR
Solution time: 2023-2025
Project No: 23-04772S

The high temperature exposure of alkali activated aluminosilicates leads to the initiation of physical and chemical processes, which result in changes in microstructure, texture and composition, and consequently affect also the functional properties. Contrary to the commonly used precursors with very high amorphous content, typically 80-90%, ceramic precursors contain mostly only up to 50% of amorphous phase. Therefore, the effect of high temperatures on alkali activated low-reactivity ceramics differs from those based on highly reactive precursors. In this project, the physical and chemical processes in alkali activated low-reactivity ceramics exposed to high temperatures are analyzed and compared with those taking place in alkali activated aluminosilicates based on common high reactivity precursors, such as metakaolin. The complex investigation program includes advanced material characterization techniques and a wide set of functional parameters which allows an in-depth analysis of links between the parameters, microstructure, and chemical and mineralogical composition.

Principal investigator

Robert Černý

2 2435 5044

Office: A330