Control of thermal barrier performance by optimized nanoparticle size and experimental evaluation using a solar simulator

Hiroki Gonome, Mehdi Baneshi, Junnosuke Okajima, Atsuki Komiya, Noboru Yamada, Shigenao Maruyama

Research output: Contribution to journalArticle

12 Citations (Scopus)


An experimental investigation to evaluate the radiative properties of a selectively transparent thin coating on a substrate of a different material has been performed in order to evaluate its thermal behavior for applications where a low temperature at the surface exposed to the sun is desired. Copper (II) oxide (CuO) micro-particles have been used to create a pigmented coating on a paper substrate. The particle volume fraction and size have been optimized by the theoretical methodology. The spectral reflectance was measured using spectroscopy in the visible (VIS) and near-infrared (NIR) regions. The spectral emissivity was evaluated from the reflectance in IR region. The temperatures of the designed coatings and typical black paints are measured in a solar simulator. The temperature measurement was simulated by numerical analysis. The temperature of CuO coating on standard white paper was 10. °C lower than the ones of typical black paint while keeping the desired dark tone.

Original languageEnglish
Pages (from-to)81-89
Number of pages9
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
Publication statusPublished - 2014 Dec



  • Cool coating
  • Radiative heat transfer
  • Radiative spectral control
  • Temperature measurement

ASJC Scopus subject areas

  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy

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