High temperature W-TiC Multilayer Solar Selective Coatings

Abstract

Tungsten-embedded titanium carbide (W-TiC) cermet solar selective coatings were deposited on the stainless steel substrates by using DC and RF reactive magnetron co-sputtering Different W content was controlled by varying the W target power The correlation between W embedding quantity and material characteristics (i e XRD pattern Raman spectrum SEM morphology TEM cross section and reflectance spectrum) were investigated The whole multilayer: SS/ W/ HM W-TiC/ LM W-TiC/ HfO2 was deposited and achieve 94 8% of absorptance and 9 8% of emittance (at 100°C) The thermal stability was studied by annealing process in air at different temperature (i e 600°C 700°C and 800°C) for 2 hours By measuring the XRD and reflectance spectrum It is confirmed that the thermal stability of the whole multilayer was up to 700°C in air

Date of Award	2020
Original language	English
Supervisor	Jyh-Ming Ting (Supervisor)