수소로 산화철을 환원시킬 때 환원속도에 미치는 첨가물의 효과와 역할을 규명하기 위하여 산화철의 중량감소, 격자정수, 전기전도도를 측정하였다. 그 결과 Li₂O는 환원속도와 전기전도도를 증가시켰고 Al₂O₃와 Ga₂O₃는 감소시켰는데, α-Fe₂O₃의 결손구조와 전자이동기구로서 이를 설명하였다.
한편 280℃∼425℃의 실험범위에서 α-Fe₂O₃는 금속철로 직접 환원되었으며, 모든 속도론적 Data는 Avrami식에 잘 맞았다.

To clarify the effect of additives on the reduction rate of hematite with hydrogen and the role of additives, the loss of weight, the lattice constant, and the electrical conductivity have been measured for pure and doped hematite. The reduction rate was increased and the electrical conductivity was decreased by the addition of Li₂O and trivalent oxides （Al₂O₃ and Ga₂O₃）. The effect of additives on the electrical conductivites is discussed in term of electron transfer mechanism. In the temperature range of 280℃ to 425℃, hematite is directly reduced to metallic iron. The kinetic data show good agreement with Avrami equation.