Formation of tin-based crystals from a SnAgCu alloy under formic acid vapor. (7th November 2018)

• Record Type: Journal Article
• Authors: Conti, Fosca; Hanss, Alexander; Mokhtari, Omid; Bhogaraju, Sri Krishna; Elger, Gordon
• Is Part Of: New journal of chemistry. Volume 42:Number 23(2018)
• Page Start: 19232
• Page End: 19236
• Publication Date: 2018-11-07
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c8nj04173c
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : A new method is developed to crystallize tin formates in a formic acid-enriched nitrogen atmosphere. The SAC alloy is used. Abstract : The use of formic acid vapor in soldering is growing. In the presence of SnAgCu powder, used as a bonding material to replace Pb-containing alloys, undesired deposits are observed. To understand this phenomenon, the mass change of a sample of alloys was investigated between 40 and 260 °C and the evolved gas was analyzed. In the quest to identify the unwanted deposits, a new strategy was researched and developed to increase the quantity of the produced deposit and to obtain it on a target surface for further studies. Unexpectedly, crystals were produced. The growth process of the crystals was optimized to reach crystal structures at nearly 1 mm in height. Unusual shapes were detected.