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采用金属溶液-固相产物直接平衡法,研究了铝基溶液中铈与锰、铈与锌的相互作用。结果表明,800℃时,铝-铈-锰溶液体系中有平衔产物 AlCe_2Mn_3存在,其标准生成自由能为△G_(AlCe2Mn3)~0=-159.3kJ/mol;反应 AlCe_2Mn_(3(s))=Al_(1)+2[Ce]+3[Mn]的平衡常数为 K_(AlCe2Mn3)=1.76×10~(-8);铈与锰的相互作用系数为 e_(Ce)~(Mn)=-5.19,e_(Mn)~(Ce)=-2.03,ε_(Ce)~(Mn)=ε_(Mn)~(Ce)=-2430。700℃时,铝-铈-锌溶液体系中存在两种平衡产物:Al_2CeZn_2和Ce_3Al_(11),前者的标准生成自由能为△Gu_(Al2CeZn2)~0=-81.0kJ/mol,平衡反应 Al_2CeZn_(2(s))=2Al_(1)+[Ce]+2[Zn]的平衡常数为 K_(Al2CeZn2)=4.48×10~(-5),铈与锌的相互作用系数为 e_(Ce)~(Zn)=-5.54,e_(Zn)~(Ce)=-2.59,ε_(Ce)~(Zn)=ε_(Zn)~(Ce)=-3088。
The interaction between cerium and manganese, cerium and zinc in aluminum-based solution was studied by direct equilibrium method of metal solution-solid phase product. The results show that AlCe_2Mn_3 exists in the system of Al - Ce - Mn solution at 800 ℃, and its standard formation free energy is △ G_ (AlCe2Mn3) ~ 0 = -159.3kJ / mol. The reaction of AlCe_2Mn_ (3 The equilibrium constant of Al_ (1) +2 [Ce] +3 [Mn] is K_ (AlCe2Mn3) = 1.76 × 10 -8. The interaction coefficient of cerium and manganese is e_ (Ce) -5.19, e - Mn - Ce = - 2.03, Ce - Mn = Ce - Ce = - 2430.700 ℃, there are two The equilibrium products of Al 2 CeZn 2 and Ce 3 Al 11 are as follows: △ Gu_ (Al2CeZn2) ~ 0 = -81.0kJ / mol and equilibrium reaction Al_2CeZn_ (2) = 2Al_ (1) + [Ce] The equilibrium constants of +2 [Zn] are K_ (Al2CeZn2) = 4.48 × 10 ~ (-5), the interaction coefficients of cerium and zinc are e_ (Ce) ~ ) = - 2.59, ε_ (Ce) ~ (Zn) = ε_ (Zn) ~ (Ce) = - 3088.