Activity Measurement of the Constituents in Molten Ag-In-Sn Ternary Alloy by Mass Spectrometry

Takahiro Miki; Naotaka Ogawa; Tetsuya Nagasaka; Mitsutaka Hino

doi:10.2320/matertrans.42.732

Takahiro Miki, Naotaka Ogawa, Tetsuya Nagasaka, Mitsutaka Hino

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Keywords: mass spectrometry, thermodynamics, silver, indium, tin, activity, excess Gibbs energy, interaction parameter

JOURNAL FREE ACCESS

2001 Volume 42 Issue 5 Pages 732-738

DOI https://doi.org/10.2320/matertrans.42.732

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Abstract

Activities of the constituents in one of the Pb-free solder systems, Ag–In–Sn, were studied experimentally using a mass spectrometer. Ion current ratios of Ag to In were measured in the temperature range 1273–1523 K . From the experimental results and the assessed thermodynamic properties of molten Ag–Sn, Ag–In, and In–Sn binary alloys, the excess Gibbs energy of liquid Ag–In–Sn ternary alloy was determined.

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