高強度なコーディエライト/ジルコン複合焼結体の作製

概要

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Calcination at 1273 K for 24 h for raw materials of talc, kaolin, feldsper, alumina, silica, and zircon to decompose talc and kaolin, followed a ballmilling treatment, was effective for increasing crystallinity of cordierite phase and relative density of the fabricated sintered body compared to a case of using an unheated powder only ballmilled. Thermal expansion rate of the fabricated sintered body decreased with increasing the sintering temperature, due to phase formation of cordierite with thermal expansion rate lower than zircon. Bending strength of the sintered body was lowered because the pore produce derived from talc crystal was suppressed by combination of the calcination and ballmilling treatment.