Acta Metallurgica Sinica (English Letters) ›› 1990, Vol. 3 ›› Issue (7): 20-22.

• Research paper • Previous Articles     Next Articles

ACTIVITIES OF COMPONENTS IN MgO-B_2O_3 MELT

ZHANG Chengtao JI Chunlin Northeast University of Technology,Shenyang,China ZHANG Chengtao,Division of Physical Chemistry of Metallurgy,Northeast University of Technology,Shenyang,China   

  • Received:1990-07-11 Revised:1990-07-11 Online:1990-07-11 Published:2009-10-10

Abstract: The activity of MgO in MgO-B2O_3 melt was experimentally determined at 1773 and 1823 K by means of slag-liquid Sn equilibrium.The activity of B_2O_3 was calculated by integrating Gibbs-Duhem equation.The standard Gibbs energies of formation of binary compounds 2MgOB_2O_3 and 3MgO·B_2O_3 were estimated with the activity data of components in B_2O_3-MgO melt.

Key words: MgO-B_2O_3, slag, activity