High Temperature Multilayered W-HfO2-x Solar Absorber Coatings

Abstract

Tungsten-doped Hafnium oxide (W-HfO2-x) coatings were deposited using RF and DC reactive magnetron co-sputtering techniques Stainless steel (5 x 5 cm) was used as substrates for solar absorber W-HfO2-x coatings In this works various deposition parameters including sputtering power O2 flow rate and deposited time were investigated The resulting coatings therefore exhibit various compositions crystal structures grain sizes and thicknesses The obtained coatings were examined using field emission scanning electron microscopes (FE-SEM) transmission electron microscopes (TEM) glazing angle X-Ray diffraction (GIXRD) UV/vis/NIR spectrometer and emissionmeter Effects of the material characteristics on the coating performance are discussed

Date of Award	2019
Original language	English
Supervisor	Jyh-Ming Ting (Supervisor)