摘要
用AIF_6^(3-)络合离子逐级分解模式和亚晶格溶液模型计算了LiF-AlF_3熔体中AlF_6^(3-)逐级分解常数和分解能分解常数依次为K_1=1.6×10^(-1),K_2=1.02,K_3=8.0×10^(-2);分解能为H_1=25.7kJ/mol,H_2=30.0kJ/mol,H_3=63.6kJ/mol计算表明,LiF-AlF_3熔体中的络合离子AlF_6^(3-)较其他碱金属冰晶石体系中的AlF_6^(3-)有更强的分解趋势和较小的分解能本文还计算了LiF-AlF_3熔体中各组成的摩尔浓度及其它溶液混合热力学量。
The dissociation model of complex ion, combined with the sublattice solution
model is applied to calculate constants and heats of dissociation successively of complex ion
AlF_6^(3-). The results show that AlF_6^(3-)in LiF-AlF_3 melt has a stronger tendency to
dissociation and smaller heats of dissociation than that in other alkali fluoride and the alumi-
num fluoride system. The molar concentration of each composition in LiF-AlF_3 melts are
calculated, and the thermodynamic properties of mixing for LiF(l) and AlF_3(s) are calculated
as well. The results of calculation agree with experimental results.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1993年第9期B396-B400,共5页
Acta Metallurgica Sinica
关键词
炼铝
熔蝠体
热力学
计算
LiF-AlF_3 melt
thermodynamic property
dissociation
