Determination of Gibbs energy of formation of cuspidine (3CaO•2SiO2•CaF2) from the electromotive force method using CaF2 as the solid electrolyte

被引：12

作者：

Fukuyama, H ^{[1
]}

Tabata, H ^{[1
]}

Nagata, K ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Chem & Mat Sci, Tokyo 1528552, Japan

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 2003年 / 34卷 / 03期

关键词：

D O I：

10.1007/s11663-003-0076-z

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

The standard Gibbs energy change for the following reaction has been directly determined by electromotive force (EMF) measurement using CaF2 as the solid electrolyte in the temperature range from 1313 to 1329 K. 3CaO . 2SiO(2) . CaF2 (S) + CaO (s) = 2(2CaO . SiO2) (S) + CaF2 (s) Delta(r) Gdegrees/kJ = 15.9-0.0192T (+/-0.2) From the preceding results, the standard Gibbs energy of formation of cuspidine has been evaluated for the first time as Delta(f) Gdegrees(cuspidine)/kJmol(-1) = -5198 + 0.825 T (+/-12) The chemical potential diagram for the CaO-SiO2-CaF2 system has been developed at 1323 K based on the thermodynamic data obtained in the present study.

引用

页码：307 / 311

页数：5

共 18 条

[1]

[Anonymous], 1995, THERMOCHEMICAL DATE

[2]

Chase M.W., 1998, NIST JANAF THEMOCHEM, V4th, P1

[3]

PHASE EQUILIBRIUM DIAGRAM OF SYSTEM CAO-AL2O3-CAF2 [J].

CHATTERJEE, AK ;

ZHMOIDIN, GI .

JOURNAL OF MATERIALS SCIENCE, 1972, 7 (01) :93-+

[4]

Thermal resistance at the interface between mold flux film and mold for continuous casting of steels [J].

Cho, J ;

Shibata, H ;

Emi, T ;

Suzuki, M .

ISIJ INTERNATIONAL, 1998, 38 (05) :440-446

[5]

Heat transfer across mold flux film in mold during initial solidification in continuous casting of steel [J].

Cho, JW ;

Emi, T ;

Shibata, H ;

Suzuki, M .

ISIJ INTERNATIONAL, 1998, 38 (08) :834-842

[6]

ELECTRONIC CONDUCTIVITY IN SOLID CAF2 AT HIGH-TEMPERATURE [J].

DELCET, J ;

HEUS, RJ ;

EGAN, JJ .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1978, 125 (05) :755-758

[7]

Jacob KT, 1999, Z METALLKD, V90, P491

[8]

HEATS OF FORMATION OF CUSPIDINE) 3CAO,2SIO2,CAF2, AND MINERAL PHASE, 3CAO,3AL2O3,CAF2 [J].

JACQUES, JK .

JOURNAL OF THE CHEMICAL SOCIETY, 1963, (SEP) :4297-&

[9]

Improvement of the initial stage of solidification by using mild cooling mold powder [J].

Kawamoto, M ;

Tsukaguchi, Y ;

Nishida, N ;

Kanazawa, T ;

Hiraki, S .

ISIJ INTERNATIONAL, 1997, 37 (02) :134-139

[10]

KUBASCHEWSKI O, 1993, MAT THEMOCHEMISTRY

← 1 2 →