Dissolution Equilibrium of Bismuth Vapor in Liquid Iron and the Interaction Effect of Third Element

The dissolution equilibrium of Bi vapor in liquid iron and the interaction effect of third element were conducted in a sealed Mo reaction chamber by vapor pressure method. The relationship between the standard solution Gibbs free energy of Bi in liquid iron and temperature obtained can be expressed. The interaction coefficients of third elements on Bismuth in liquid iron at 1 873 K can be deduced.

Dissolution Equilibrium of Calcium Vapor in Liquid Iron

The dissolution equilibrium of calcium vapor in liquid iron was carried out at 1873 K in a two-temperature zone furnace by using vapor pressure method.A sealed Mo reaction chamber and a self-made CaO crucible were used in this experiment.The thermodynamic parameters obtained are as follows for reaction Ca(g) =[Ca]\nK = 4.27-15040/T△G^0 = 125000-35.5T J/mol The relation between dissolved amount of calcium in liquid iron(1873K) and calcium vapor pressure is expressed as[%Ca]= 0.028 pc.

Equilibria of Al-N and Nb-N in Molten Iron

The equilibria of Al-N and Nb-N in molten iron at 1600℃ to 1700℃ by using of samplingmethod have been conducted. The thermodynamic parameters obtained areFor the reaction of 1/2N_2=[N] , lgK=-1106/T-0. 771lgK_(AiN) =- 9909/T + 3. 81=- 1 89800- 73.0/T J/mol, =- 0. 530+ 936/TlgK_(NbN)= - 34700/T+ 1 8. 37= - 664650- 352T J/mol, =- 0. 090- 258. 8/T

Fe－Bi－j三元溶液体系热力学参数的测定与模型计算

利用气液平衡实验方法和三元系液态合金元组间相互作用系数的计算模型，测定和计算了Ｆｅ－Ｂｉ－ｊ三元溶液体系在１８７３Ｋ时第三组合组元Ｃｒ，Ｃｕ，Ｃ，Ａｌ和Ｓｉ对Ｂｉ的活度相互作用系数以及ｌｎγ＾０值。实验值与模型计算值符合良好。

Fe液中Bi蒸气溶解平衡及第三组元的影响

用密封反应室气液平衡法，测定了Bi蒸气在Fe液中的溶解平衡及第三组元Cr，Cu，C，Al和Si对Bi溶解量的影响，得到Fe液中Bi蒸气溶解反应标准溶解吉布氏自由能与温度的关系式，以及1873K温度下Fe液中第三组元与Bi的活度相互作用系数.

铁液中钙蒸气溶解平衡的研究

利用气一液平衡法，在双恒温带钼丝炉及密封钼反应室内，进行了铁液中钙蒸气溶解平衡的研究，得到反应式Ｃａ＿（ｇ）＝［Ｃａ］的溶解平衡常数及标准溶解自由能分别为１ｎＫ＝４．２７－１５０４０／ＴΔＧ￣０＝１２５０００－３５．５ＴＪ／ｍｏｌ１８７３Ｋ下铁液中钙溶解量与钙饱和蒸气压关系为［％Ｃａ］＝０．

Fe液中Ba-O,Ba-S,Ba-P平衡的研究

应用Ba蒸气平衡法,在密封Mo反应室内,用自制的TiN和BaS坩埚,进行了纯Fe液中Ba—O,Ba—S,Ba—P平衡的研究。得到反应:BaO_(s)=[Ba]+[O]的标准自由能ΔG°_(wt-%)=188500+38.3T J/mol,e_O^(Ba)=624-1.25×10~6/TBaS_(S)=[Ba]+[S]的标准自由能ΔG°_(wt-%)=469100-111T J/mol,e_S^(Ba)=826-1.64×10~6/T1873K下,反应Ba_3P_2=3[Ba]+2[P]的K_(Ba_3P_2)=7.76×10^(-18),e_(Ba)~P=0.95,ΔG°_(wt-%)=613200 J/mol。