Acta Phys. -Chim. Sin. ›› 1998, Vol. 14 ›› Issue (12): 1098-1103.doi: 10.3866/PKU.WHXB19981208

• ARTICLE • Previous Articles     Next Articles

Phase Diagram of Sn-In-Zn System and its Use for Lead-free Solder

Zheng Yu-Jun, Zhang Qi-Yun   

  1. Chemistry Department,Peking University,Beijing 100871
  • Received:1998-03-03 Revised:1998-06-25 Published:1998-12-15
  • Contact: Zhang Qi-Yun


The liquidus of Sn-In-Zn system was determined by means of DTA technique. It was proved that the system has a ternary eutectic point at 108℃ containing Sn:46, In:52, Zn:2(100w). Based on the phase diagram and the DTA results. the optimum component of Sn-In-Zn alloy used for lead-free solder is recommended as(6.7Zn--8.0In-85.3Sn) with a melting temperature of 188℃.

Key words: Sn-In-Zn, Ternary phase diagram, Lead-free solder