中文摘要：

在不同气氛的 Sn 微滴的 Undercooling 被快在使 1,000 的率凉下来扫描热量测定(FSC ) 学习 ? K/s。undercooling 与增加氧的部分压力减少了，这被发现。随机分布式的 SnO < 潜水艇 class= “ a-plus-plus ” > 2 个 岛在微滴表面上被观察到形式，它多半支持了异构的表面成核。作为氧变化，成核率和 SnO 的生长的部分压力 < 潜水艇 class= “ a-plus-plus ” > 2 导致了不同氧化物岛，它为熔融的 Sn 微滴的成核导致了各种各样的潜在的催化地点。结果证明 Sn 微滴的成核过程对团结环境敏感，因此，空气应该在单个 Sn 微滴的成核行为的学习被考虑。

英文摘要：

Undercooling of Sn droplets in different atmospheres was studied by fast scanning calorimetry （FSC） at cooling rate of 1,000 K/s. It is found that the undercooling decreased with increasing partial pressure of oxygen. Randomly distributed SnO2 islands were observed to form on the droplet surface, which likely has promoted the heterogeneous surface nucleation. As the partial pressure of oxygen changes, the nucleation rate and growth of SnO2 led to different oxide islands, which resulted in various potential catalytic sites for the nucleation of the molten Sn droplet. The results showed that the nucleation process of the Sn droplets was sensitive to the solidification environment, and therefore the atmosphere should be taken into account in the study of the nucleation behavior of the single Sn droplets.