RARE EARTH-CONTAINING ALKALI SILICATE FRITS AND THEIR USE FOR THE PREPARATION OF PORCELAIN ENAMEL COATINGS WITH IMPROVED CLEANABILITY

摘要

The present invention relates to a rare earth-containing alkali silicate frit which may be applied to a metal substrate to provide a porcelain enamel coating which has good thermal stability, an acid resistance of A on the PEI scalc and improved cleanability, wherein the frit contains, based on the total weight of the frit (I), wherein R represents an alkali metal and X represents a rare earth oxide having an atomic number of 57-60, preferably cerium oxide. The present invention is also directed to porcelain enamel coatings, especially for appliances prepared from this rare earth-containing, alkali silicate frit.