%0 Journal Article
%T ACTIVITIES OF CaO AND La_2O_3 IN LIQUID CaO-SiO_2-La_2O_3 SLAGS AND SLAG STRUCTURE
%A WU Jianzhong WANG Changzhen Northeast University of Technology
%A Shenyang
%A China Professor
%A DeptNon-ferrous Metallurgy
%A Northeast University of Technology
%A Shengyang
%A China
%A <br>WU Jianzhong WANG Changzhen Northeast University of Technology
%A Shenyang
%A China Professor
%A Dept.Non-ferrous Metallurgy
%A Northeast University of Technology
%A Shengyang
%A China
%J 金属学报(英文版)
%D 1989
%I 
%X The activity of CaO and La_2O_3 in the liquid ternary slay CaO-SiO_2-La_2O_3 has been de-termined by equilibrating Sn with the slag phase in a graphite crucible under l arm of CO at1600C.The experimental results ,showed that the activity of CaO and La_2O_3 changes slowlywhile the ratio of mole fraction.x_(CaO)/x_(SiO_2),is less than unit.hut varies sharply while the ra-rio increases from 1 to 1.2.In addition,by equilibrating Sn with the binary slagB_2O_3-La_2O_3 saturated witlt solid La_2O_3 at three different temperatures,the relation betweenIgγ_(La)~0 and I/T is determined as follows:Igγ_(La)~0=-20400/T+11.37(1500-1600C)A random network model of molten silicate structure was applied to CaO-SiO_2-La2O_3.It was found that the experimentally determined activity-composition curve of CaO arequalitatively reproduced by the curves calculated with the model,but the curves of La_2O_3 areconsiderahly different from the calculated ones.It implies that the model used is over-simpli-fied and that the difference in interaction energy between the metal cations of different valenceand silicate anions should be considered.
%K CaO-SiO_2-La_2O_3 ternary system slag
%K slag structure
%K activity<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=C19B08D052F5FD8445F4BB80A1A5D7BF&aid=A72E8957F6892AC1D32CED57B1AA399B&yid=1833A6AA51F779C1&vid=0B39A22176CE99FB&iid=DF92D298D3FF1E6E&sid=CA4FD0336C81A37A&eid=DF92D298D3FF1E6E&journal_id=1006-7191&journal_name=金属学报(英文版)&referenced_num=0&reference_num=13