the mass fractions of the individual substances of the first and second components in the batch and also the grain fractions of the first components are indicated in the following table 1 a temporary binding agent in the form of isopropanol was added to the above batch after which the batch was mixed green bodies were then formed from the batch by pressing the green bodies were then dried at a temperature of roughly 100 u00b0 c the dried green bodies were each added to a graphite mould which is suitable for uniaxial hot pressing the green bodies were then heated in a nitrogen atmosphere in a graphite furnace to a temperature of roughly 1620 u00b0 c and kept at this temperature for around 60 minutes while the green bodies were kept at this temperature the substances of the second component formed a binding phase comprising a mgsialon polytypoid at the same time the green bodies were exposed to a pressure of 10 or 30 mpa through uniaxial hot pressing in the graphite mould while this temperature was applied to them after cooling refractory materials in the shape of formed products with the phases indicated in table 2 were obtained the materials exhibit physical properties as.