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Empowering ultrahigh solar reflectivity in glass-ceramics through m-ZrO2 nanotwins for efficient building radiative cooling
发布时间：2026-01-04
  • 发表刊物：
    Nano Energy
  • 关键字：
    Radiative cooling, Building cooling energy saving, Nanotwins, Glass-ceramic, Mechanical properties
  • 摘要：
    Porous ceramic based radiative cooling materials offers an energy-efficient solution for buildings cooling. Yet inter-connected micropores in those materials not only weaken their mechanical strength and resistance to pollutant penetration, but also inhibit the compatibility with structural colors. Herein, ultra-high reflective SiO2-ZrO2 glass-ceramics are prepared by introducing lamellar m-ZrO2 nanotwins into SiO2 matrix. m-ZrO2 nanotwins are proven effective in enhancing the reflection of sunlight, which provides an alternative to the Mie scattering of pores. The glass-ceramics exhibit a solar reflectivity of 0.98 at a low porosity of 17.62%, while maintaining excellent mechanical properties. Based on self-assembly and an annealing process, long-range ordered SiO2 microspheres arrays are deposited to the surface of the glass-ceramics, yielding structural colors and elevated reflectivity up to 0.99. The green structural colored glass-ceramics with highest reflectivity achieve 3.97 ℃ daytime cooling performance under solar irradiation of 672 W m-2. When used as the envelope of a typical four-story midrise apartment building, such glass-ceramics demonstrate cooling energy saving by at least 15% and the highest annual electricity cost saving of 44,136 CNY (6,199 USD) across 32 representative cities in China. The developed SiO2-ZrO2 glass-ceramics hold tremendous potential for use in advanced radiative cooling, particularly of buildings.
  • 第一作者：
    Jieyan Zhao
  • 通讯作者：
    Qian Wan,Ning Qin,Jiangtao Li
  • 全部作者：
    Wenjie Luo,Xuanlin Pan,Qing Meng,Huakang Zhang,Jing Xia,Xiangling Ren,Lei Kang
  • 论文类型：
    期刊论文
  • 论文编号：
    111700
  • 影响因子：
    17.1
  • DOI码：
    10.1016/j.nanoen.2026.111700
  • 是否译文：
    否
  • 发表时间：
    2026-01
  • 收录刊物：
    SCI
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