다공성 지르코니아 표면에서 Capillary wicking 으로 인한 물의 Leidenfrost 억제 현상

A significant increase in the Leidenfrost point temperature was observed on a porous zirconia surface compared with non-porous surface. Two samples (Non-porous, Porous surface) were fabricated by sintering. The porosity of each surface was calculated 0.8% and 30.9% from sample and particle densities. The Leidenfrost phenomenon was not observed on the porous surface for surface temperature up to 500 ℃ compared to the Leidenfrost point on non-porous surface 410 ℃. The key phenomenon determining Leidenfrost phenomenon is the rebound process of droplet during a few milliseconds following the impact on the surface. On the porous surface, due to the capillary wicking phenoenon, the rebound was disturbed.