Engineered hierarchically porous cooling ceramic. (IMAGE)

The Hong Kong Polytechnic University

Engineered hierarchically porous cooling ceramic.

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(A) Photograph of the cooling ceramics with flat and curved shapes. Patterns can also be applied on the cooling ceramic surface. (B) SEM images of a fabricated cooling ceramic sample showing the hierarchically porous structure. (C) Volume concentration of pores within the cooling ceramic. (D) Comparison of the optical properties of the white cooling ceramic with a 600 μm thickness and a 70% porosity to those of white-pigmented polymer (Al2O3-doped polydimethylsiloxane), silver, and white commercial tile. (E) Simulated scattering efficiency of porous alumina systems, including three monodispersed systems and one multidispersed system (the total pore volume concentrations are the same). The multidispersed case includes 0.3, 0.5, and 2 μm pores with a volume concentration ratio of 1:1:2. (F) Angular Rsolar(θ) value of the cooling ceramic. (G) Angular εAW(θ) value of the white cooling ceramic.

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© 2024 Research and Innovation Office, The Hong Kong Polytechnic University. All Rights Reserved.

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