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Title: Near-field radiative heat transfer between two parallel SiO{sub 2} plates with and without microcavities

Near-to-far-field radiative heat transfer between two macroscopic SiO{sub 2} plates—with and without microcavities—was observed using a highly precise and accurate optical gap-measurement method. The experiments, conducted near 300 K, measured heat transfer as a function of gap separation from 1.0 μm to 50 μm and also as a function of temperature differences between 4.1 and 19.5 K. The gap-dependent heat flux was in excellent agreement with theoretical predictions. Furthermore, the effects of microcavities on the plate surfaces were clearly observed and significant enhancement of near-field radiative heat transfer was confirmed between gold-coated microcavities with narrow vacuum separation.
Authors:
 [1] ;  [2]
  1. Graduate School of Energy and Environmental Science, Nagaoka University of Technology, Nagaoka, Niigata 940-2188 (Japan)
  2. Department of Mechanical Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188 (Japan)
Publication Date:
OSTI Identifier:
22399123
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ENERGY GAP; GOLD; HEAT FLUX; HEAT TRANSFER; PLATES; SILICA; SILICON OXIDES; SURFACES; TEMPERATURE DEPENDENCE