Non-wettable material with Si melt is preferred to manufacture crucible in order to avoid adhesion between Si and traditional fused silica crucible. In this work, wetting and infiltration behaviors of Si drop on porous/dense SiO₂-Si₃N₄ ceramic and SiO₂ ceramic were systematically studied via the sessile drop technology and microstructural analysis method. The porous SiO₂-Si₃N₄ ceramic exhibited non-wetting behavior with stable contact angle of about 130 °. Nevertheless, dense SiO₂-Si₃N₄ ceramic and SiO₂ ceramic displayed wetting features with Si drop. For both SiO₂-Si₃N₄ ceramics, three kinds of infiltrations were observed, including infiltration under Si drop, infiltration under substrate surface (beyond drop) and infiltration on substrate surface. Notably, the infiltration under Si drop had the slowest speed with tiny infiltration depth. The above non-wetting behavior and tiny infiltration under drop of porous SiO₂-Si₃N₄ ceramic were closely related to material pore characteristics and Si/substrate interfacial reaction.

使用硅熔体的不可润湿材料优选用于制造坩埚，以避免硅与传统熔融石英坩埚之间的粘附。本工作通过固滴技术和微观结构分析方法，系统地研究了Si滴对多孔/致密SiO ₂ -Si ₃ N ₄陶瓷和SiO ₂陶瓷的润湿和浸润行为。多孔SiO ₂ -Si ₃ N ₄陶瓷表现出非润湿行为，接触角稳定在130°左右。然而，致密的 SiO ₂ -Si ₃ N ₄陶瓷和 SiO ₂陶瓷显示出具有 Si 滴的润湿特性。对于这两种SiO ₂ -Si ₃ N ₄陶瓷，观察到三种渗透，包括Si液滴下的渗透、衬底表面下的渗透（超越液滴）和衬底表面的渗透。值得注意的是，Si 滴下的渗透速度最慢，渗透深度很小。多孔SiO ₂ -Si ₃ N ₄陶瓷液滴下的上述不润湿行为和微小渗透与材料孔隙特性和Si/基体界面反应密切相关。