Activation Energy Measurement of Cu/SS-AlN/SiAlOx Solar Selective Absorbing Coating
Activation energy is an important parameter which determines thermal stability of solar selective absorbing coating.In this investigation,a new performance criterion (PC) was defined for solar selective coating according to our modified equation of photo-thermal conversion.Then the activation energy of Cu/stainless steel (SS)-AlN/SiAlOx solar selective absorbing coating was measured.Cu/SS-AlN/SiAlOx tandem films were deposited by magnetron sputtering.Accelerated ageing tests were performed on the coating at 500℃ and 550℃,under the atmosphere,calculating PC from the reflectance spectrum and measuring the failure time.According to Arrhenius equation,the activation energy and the equivalent life span of Cu/SS-AlN/SiAlOx tandem film at 400℃ were determined to be about 187.4kJ/mol and more than 16260 hours,respectively.
Activation energy Cu/SS-AlN/SiAlOx Solar selective coating Equivalent life span
Jinping Wang Bo Yuan Jian Wang Yi Luo
Department of Electronic Engineering, Tsinghua University, Information Science and Technology National Laboratory, Beijing, 100084, China
国际会议
the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))
太原
英文
870-877
2012-07-13（万方平台首次上网日期，不代表论文的发表时间）