Fe-Cr-O 系状態図に関する研究

概要

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To study the defect structure in tetragonal chromite, its density, thermogravimetic, property, electric resistance and thermo e.m.f. were measured. Furthermore the influence of nitrogen or carbon on the formation of tetragonal chromite was studied. The results obtained are as follows : 1) The effect of nitrogen or carbon on the formation of the tetragonal chromite was not determined. 2) Results from thermogravimetric studies have shown good agreement with those from X-ray studies. 3) Isothermal phase diagram of Fe-Cr-O system at 1600℃ was established. The relationshp between the chromium content of Fe-Cr melt and the oxide phase equilibrated was determined. { below 1%Cr-cubic chromite 1∿7%Cr-c/α=1∿0.95 above 7%Cr-Cr_2O_3 4) From single phase region of chromite, the chemical composition of chromite having axial ratio c/α=0.95 was determined as (Fe_<0.26>・Cr_<0.74>)_<3.04>O_4. 5) Defect structures in cubic and tetragonal chromites were confirmed.
社団法人日本鉄鋼協会の論文
1970-05-01