Unfired pressed bearing plate for firing ceramic products, especially sanitary ceramics

摘要

An unfired pressed underplate for the firing process for ceramic products, in particular sanitary ceramics An unfired pressed underplate for the firing process for ceramic products, in particular sanitary ceramics, comprises a mixture including at least one alumosilicate compound with the fraction ranging from 0.1 μm to 100 μm and 0.5 to 15% by weight of alkaline activator. The alumosilicate compound is preferably chosen from the following group: clay soils based on kaolin, metakaolin or micronized clay, mixtures containing feldspar and quartz, fired ceramic bodies or a combination thereof. The alkaline activator is chosen from the group comprising sodium hydroxide and/or potassium hydroxide and/or sodium silicate and/or potassium silicate. The unfired pressed underplate according to this invention can be used for the prevention of deformation or damage to the ceramic product placed on the plate during the firing process at high temperatures.