Patent ID: 7968483
Filing Date: 2011-06-28
Classification: C04B

Abstract:
1. Fired, refractory ceramic product with an open porosity in excess of 10% by volume up to 30% by volume and a permeability to gas of <5×10 −13 m 2 , produced from a batch which contains less than 5% by weight of components which form molten phase at an application temperature of up to 1,500° C. and which, in addition to 50-90% by weight of fine particulate refractory material with a grain size of d 90 <100 μm, contains 10-50% by weight of coarse particulate refractory material with a grain size of d 90 >500 μm, and the proportion of particles with a grain size d90 of between 100-500 μm is limited to ≦10% by weight.