On the Study of the physical properties and application of Antimonial Tin-Lead Solders

• Main Authors: SHAW JIA-SHEN, 邵嘉生
• Other Authors: 蔡啟堂
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/12544753996688105974

碩士 === 中國文化大學 === 應用化學研究所 === 87 === In order to analyze the relationship between level of antimony weight percent and the liquid & solid melting point of the tin-lead alloys, this study uses three sets of the tin-lead alloys samples, there are 50%, 55%, and 60% by weight of tin as the basis and obtain the readings of liquid & solid melting points by increasing a variety amount of antimony from 0.5% to 2.5%. These results are further analyzed using statistical method, which can reach the level of confidence 95%. It is expected that the data presented may provide reference for the production of new antimonial tin-lead solders. The analysis shows that the appropriate per cent by weight of antimony can replace hight-level per cent by weight of tin in the tin-lead solders. Sn55 tin-lead solders can be replaced by antimonial tin-lead solders which contain 2.0% antimony and 50% tin; Sn60 tin-lead solders can be replaced by antimonial tin-lead solders which contain 2.0% antimony and 55% tin. The best result can be achieved by replacing Sn63 with antimonial tin- lead solders containing antimony at 0.5% or above and tin at 60%. In this stuty, the atomic absorption spectroscopy is also used to determine the level per cent by weight of tin in the tin-lead alloys, besides the study of the impact on absorption of tin by the indirect materials, such as lead,copper, antimony, hydrochloric acid, and tartaric acid is explored in order to find the solutions to remove these impacts. The experiments show that the existence of lead interferes the level of atomic absorption of tin and that of tartaric acid and hydrochloric acid slightly change the level of atomic absorption of tin. The determination of the most ideal operating conditions is achieved by measuring the compound￠s accuracy,sensitivity and stability using different wavelengths and level of flame. The results indicate that the relevant standard deviation（R.S.D）is the lowest at following operating condition.