電融原料を用いたマグネシア・クロミア耐火物の熱機械特性に及ぼす微量不純物の役割

概要

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Magnesia-chrome refractories using electro-fused raw materials were produced by sintering at 1800°C for 5 h in air. The characteristics of the refractory specimens drastically changed with the flux composition precipitated in the specimen after sintering. When C/S (CaO/SiO_2) ratio in the raw material became extremely low value and near 2, the mechanical strength of the refractory specimen at high temperature was three times (ca.30 MPa) higher than that of specimens near C/S=1. The characteristics such as the elastic constant at room temperature, the thermal shock resistance, and the corrosion resistance for molten low basic slag were clearly related to the flux composition in magnesia-chrome refractories. The flux composition could be perfectly controlled with the C/S ratio in the electro-fused raw materials.
社団法人日本セラミックス協会の論文
2003-06-01