For manufacturing sintered ceramic moulded bodies and particularly moulded bodies of abrasive material including an abrasive material with relatively coarse grains such as corundum or carborundum, an aqueous mixture of raw material in question is cast into a mould for example of rubber, and withdrawn from the mould. The cooled moulded mixture is subjected to a freeze-drying process before it is fired. A particularly convenient mixture for a moulded body of abrasive material is a mixture comprised of (with respect to the dry mixture) about 70% by weight of refined corundum of which the grain size varies between 50 and 280 mesh, and of a base substance consisting substantially of pulverulent alpha-aluminium oxide with addition of potash feldspar, zirconium silicate and dextrine, and having a sintering temperature of 1770oC (2043oK).