ZrB2 ceramics were prepared by self-propagating high-temperature synthesis (SHS) and were sintered byhot pressing (HP). The effects of the granularities and doses of raw materials in Zr- B2 O3 - Mg on SHS process and product were investigated . XRD and combustion temperature curves prove that the ideal SHS reactants of Zr- B2 O3 -Mg are 50μm Zr powder , 75 μm B2O3 powder aud 400μm Mg powder with 45% excessive. The particle sizes of SHS product, acid-leached product, sintered product are 2-5 μm, 0.5-2 μm, 2-10μm respectively. Chemicol analysis indicates that the acid-leached product consists of ZrB2 (94.59%), ZrO2 (3.87%) and H3 BO3 ( 1.54% ). The sintered product has a relative density of 95.4% .
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