程江,李成武,韩华

• 1:华南理工大学化学与化工学院
• 2:广州汉源新材料有限公司

摘要(Abstract)：

设计一种测量助焊剂高温下分解压力的装置,模拟药芯焊锡丝中助焊剂在焊接温度下封闭环境中所产生的变化,探究了加入不同松香和有机酸对助焊剂高温下分解产生压力的影响,采用扩展率实验,对以不同松香作为载体助焊剂的活性和焊后残留进行研究。结果表明含有改性松香的助焊剂分解产生压力比普通松香小,其中氢化松香甘油酯的加入对助焊剂分解压力减小最有利,最终压力为16 k Pa。实验中比较的三种有机酸活性剂,含有高沸点辛二酸的助焊剂分解压力最低为17 k Pa,扩展率实验显示改性松香残留较少,扩展率与无色氢化松香相近。文中设计了三种分解蒸汽压值不同的助焊剂,并灌芯拉丝制成锡丝后进行飞溅率测试,结果表明分解蒸汽压值较低,所制锡丝的飞溅率也较低,消泡剂的加入对减少助焊剂的飞溅率有显著作用,三款助焊剂的分解蒸汽压值最高分别为34、27和26 k Pa,锡丝的飞溅率分别为0.67%,0.32%,0.30%。

关键词(KeyWords)： 助焊剂;蒸汽压;飞溅率;松香;扩展率

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 程江,李成武,韩华

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