A novel non-selective coating material for solar thermal potential application formed by reaction between sol-gel titania and copper manganese spinel

Dani Tulchinsky, Vladimir Uvarov, Inna Popov, Daniel Mandler*, Shlomo Magdassi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

A method for preparing a novel bixbyite non-selective coating for solar thermal conversion is described. The coating is formed by a thermal reaction between a titania sol-gel precursor with a copper manganese spinel to form a new material, Cu0.44Ti0.44Mn0.84Fe 0.28O3, with a bixbyite structure. The effect of temperature and ratio between the two components on the formation of the bixbyite layer (deposited on Inconel by spray-coating) was studied. The absorptance of the films (AM 1.5; 335-2500 nm) with a thickness of 10±2 μm after annealing at 2 h at 650 C and 750 C was 97.4% and 94.7%, respectively. This synthesis represents a novel approach in which the final solar thermal coating is formed as a continuous and uniform layer which combines both the absorber and the ceramic binder. The developed material shows promising results for future applications as absorber in solar thermal energy conversion.

Original languageAmerican English
Pages (from-to)23-29
Number of pages7
JournalSolar Energy Materials and Solar Cells
Volume120
Issue numberPART A
DOIs
StatePublished - 2014

Bibliographical note

Funding Information:
This work is supported by the Singapore National Research Foundation under CREATE program: Nanomaterials for Energy and Water Management and by the Israeli Ministry of Science and Technology under the Infrastructure Program.

Keywords

  • Bixbyite
  • Ceramic composites
  • Sol-gel
  • Solar thermal
  • Spinel
  • Thin films

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