Applicability of the cooling ceramic. (IMAGE)
Caption
(A) Water droplets contacting the commercial tiles and cooling ceramic at a surface temperature of 600°C. With the commercial tiles, water cannot directly contact the surface owing to the Leidenfrost effect. After spreading due to the impact force, the droplets bounce and return to a spherical shape. In contrast, water on the cooling ceramic is constantly pinned and remains flattened upon spreading, leading to rapid evaporation. Scale bars, 2 mm. (B) Variation in the surface temperature when the samples are contacted by water droplets at 5-s intervals. The infrared thermal images show the surface temperature of the samples after thermal stabilization. Scale bars, 5 cm. (C) Photographs of the fabricated colored cooling ceramics, along with colored commercial tiles showing identical vivid colors. (D) Chromaticity of the colored cooling ceramic and colored commercial tiles in the CIE 1931 color space. (E) Comparison of the Rsolar spectra of yellow, red, green, and black cooling ceramics to those of commercialized colored tiles of the same color. (F) Outdoor temperature measurements of the colored cooling ceramics around midday, using colored commercial tiles as a control. The line color corresponds to the sample color.
Credit
© 2024 Research and Innovation Office, The Hong Kong Polytechnic University. All Rights Reserved.
Usage Restrictions
Nil
License
Original content