Part I. Dynamic corrosion of Al2O3-ZrO2-SiO2 and Cr2O3-containing refractories by molten frits. Macroscopic analysis

Autores: Baudin, C.|Criado, E.|Bakali, JJ.|Pena, P.
Fuente: J. Eur. Ceram. Soc.
31 (5), 697-703
2011

Manufacturing of enamels and frits has undergone dramatic changes since the 1980s. This has required
significant efforts in research and development. Typical compositions of frits for ceramic tiles are silica-based with
fluxing agents; some of the components are highly corrosive. Improvements in the production of frits would imply
the selection of the most adequate refractories as a function of the chemical composition of the considered frit and
the fabrication procedure.
The refractories currently used in frit furnaces are Al2O3-ZrO2-SiO2 (AZS) fused cast materials and Cr2O3-based
materials. In this work, results on dynamic corrosion studies of AZS and Cr2O3-based materials by two ZnOcontaining
frits are described. Experiments have been performed using the «Merry Go Round» test at congruent to
1500 degrees C. Macroscopic results are analysed in terms of the remaining volume after the tests, as usually done
in the glass industry. The significance and limits of such an approach are discussed