著者

加藤 周一 井口 泰孝 萬谷 志郎

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.78, no.2, pp.253-259, 1992-02-01

被引用文献数

1

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Deoxidation of liquid iron with barium was studied in the temperature range from 1600 to 1700℃. Barium and oxygen dissolved in liquid iron were brought into equilibrium in presence of pure barium oxide in the lime crucible under the inert gas atmosphere of argon. The equilibrium constant and standard free energy of the deoxidation reaction "BaO(s)=<Ba>___-(%)+O__-(%)" were obtained as follows : logK=-9980/T-1.82 (±0.11) △G°=191000+34.9T(J) (±4 kJ) The temperature dependences of the interaction parameters were expressed by the following equations : e^<Ba>_O=27.1-1.48×10^5/T e^O_<Ba>=233-1.27×10^6/T The standard free energy of solution of barium in liquid iron and the activity coefficient of barium in the infinite dilute liquid iron solution refered to pure barium (γ°_<Ba>) were calculated and discussed.

著者

萬谷 志郎

出版者

社団法人 日本金属学会

雑誌

日本金属学会会報 (ISSN:00214426)

巻号頁・発行日

vol.17, no.5, pp.430-439, 1978-05-30 (Released:2011-08-10)

参考文献数

22

著者

萬谷 志郎 井口 泰孝 本多 弘 石塚 晴彦

出版者

The Iron and Steel Institute of Japan

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.71, no.7, pp.846-852, 1985-05-01 (Released:2010-01-19)

参考文献数

18

被引用文献数

2 3

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The heat of mixing of silica(β-cristobalite) with liquid wustite melted in an iron vessel has been directly measured at 1420°C by the modified isoperibol calorimeter(iso-thermal jacket type). Mixing of solid silica with liquid wustite is an exothermic reaction and the measured heat, ΔHFetO(l)-SiO2(β-cristobalite), is about-900cal/mol at the fayalite composition. Heats of mixing of liquid silica with liquid wustite, ΔHMFetO(l)-SiO2(l), are obtained by the combination of this direct measured results and heat of fusion of SiO2 in the reference. This result is discussed in comparison with the estimated values by the thermochemical data and by the assumption of the regular solution.

著者

不破 祐 萬谷 志郎 戸崎 秀男

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.55, no.11, 1969-09-10