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The process comprises the following steps: mixtures of calcined coke and pitch are pulverized, they are size adjusted to give carbon precursor powders, dry mixed with 1-5 parts boron carbide powders of same grain size, CIP moulding is carried out, and then fired and carbonized in non-oxidizing atmospheric at <2200°C. The ceramic contains homogeneously dispersed B carbide, and shows high strength.