기전력법을 이용한 용융 Zn-Cd 합금중 Zn의 활동도 측정

정성엽; 정우광; 박종진; Sung-Youp Chung; Woo-Gwang Jung; Jong-Jin Park

Korean Journal of Materials Research, Vol.12, No.4, 283-289, April, 2002

DOI10.3740/MRSK.2002.12.4.283 Export Citation

기전력법을 이용한 용융 Zn-Cd 합금중 Zn의 활동도 측정

Activity Measurement of Zn in Liquid Zn-Cd Alloy Using EMF Method

정성엽, 정우광 ^†, 박종진¹

국민대학교 신소재공학부
¹한양대학교 재료화학공학부

Sung-Youp Chung, Woo-Gwang Jung^†, and Jong-Jin Park¹

School of Advanced Materials Engineering, Kookmin University, Seoul 136-702, Korea
¹Division of Materials and Chemical Eng., Hanyang University, Ansan, Korea

E-mail:

The E.M.F of the galvanic cell with fused salt was measured to determine the activities of zinc at 700-820K over the entire composition range of liquid Zn-Cd alloys. The cell used was as follows: (-) W | Zn(pure) Zn 2+ (KCI?LiCl) | Zn(in Zn-Cd alloy) | W (+) The activities of zinc in the alloys showed positive deviation from Raoult's law over the entire composition range. The activity of cadmium and some thermodynamic functions such as Gibbs free energy, enthalpy, entropy were derived from the results by the thermodynamic relationship. The comparison of the results and the literature data was made. The liquid Zn-Cd alloy is found to be close to the regular solution. The concentration fluctuations in long wavelength limit, S cc (o) , in the liquid alloy was calculated from the results.

Keywords:activity;zinc-cadmium alloy;electromotive force method;fused salt method;liquid alloy;thermodynamics

[References]

The Chemical Measurement in Metal I, Japan Institute of Metals, Sendai, Japan, (1976) (1976)
Taylor NW, J. Am. Chem. Soc., 45, 2865 (1923)
Sano K, Okajima K, Tatsuo S, Mem. Fac. Eng., 5, 299 (1953)
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Nakazawa S, Yazawa A, Taniuchi K, J. Japan Inst. Metals, 40, 526 (1976)
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Sommer F, Singh RN, Z. Metallkd., 85(9), 621 (1994)

[Referenced By]

[Related Articles]

[1] The Chemical Measurement in Metal I, Japan Institute of Metals, Sendai, Japan, (1976) (1976)

[2] Taylor NW, J. Am. Chem. Soc., 45, 2865 (1923)

[3] Sano K, Okajima K, Tatsuo S, Mem. Fac. Eng., 5, 299 (1953)

[4] Bohl RW, Hildebrandt VD, J. Am. Chem. Soc., 279, 2711 (1957)

[5] Wynnemer DJ, Preckshot GW, Trans. Met. Soc. AIME, 221, 186 (1961)

[6] Moser Z, Bull. Acad. Pol. Sci. Ser. Sci. Techniq., 19(9), 669 (1971)

[7] Jellinek K, Wannow HA, Z. Electrochem., 41, 346 (1935)

[8] Kozuka Z, Moriyama J, Kushima I, Electrochem. Soc. Japan, Denkikagaku, 28, 456 (1960)

[9] Ban-ya S, Maruyama N, J. Jpn. Inst. Met., 42(1), 80 (1978)

[10] Nakazawa S, Yazawa A, Taniuchi K, J. Japan Inst. Metals, 40, 526 (1976)

[11] Katayama I, Maki K, Fukuda Y, Ebara A, Iida T, Mater. Trans., 38(2), 119 (1997)

[12] Choi SD, Calphad, 14, 307 (1990)

[13] Singh RN, Can. J. Phys. C: Solid State Phys., 7, 3509 (1974)

[14] Singh RN, Sommer F, Z. Metallkd., 83(7), 533 (1992)

[15] Wang ZC, Yu SK, Sommer F, J. Chim. Phys., 30, 379 (1993)

[16] Sommer F, Singh RN, Z. Metallkd., 85(9), 621 (1994)