NI-AL2O3 SELECTIVE CERMET COATINGS FOR PHOTOTHERMAL CONVERSION UP TO 500-DEGREES-C

被引:28
|
作者
SATHIARAJ, TS
THANGARAJ, R
ALSHARBATY, H
BHATNAGAR, M
AGNIHOTRI, OP
机构
[1] Physics Department, Indian Institute of Technology, New Delhi
关键词
D O I
10.1016/0040-6090(89)90914-0
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Spectrally selective Ni-Al2O3 composite films were prepared by r.f. planar magnetron sputtering using hot-pressed targets of two different compositions. The composition of the films were varied by co-sputtering the target with additional nickel pellets distributed uniformly on the target. The composition of the films were analysed by energy-dispersive X-ray analysis. Optical simulations were carried out with the experimentally measured n and k and the published n and k of the metallic substrate. R.f.-sputtered SiO2 and Al2O3 were used as antireflection coatings. From the computer optimization studies we found that α = 0.94 and ε(100°C) = 0.07 could be obtained with 650 Å of Ni-Al2O3 (f = 0.61) antireflected with 780 Å SiO2 on a nickel-coated glass substrate. When molybdenum-coated nickel-plated stainless steel substrates were used, the films were found to be stable up to 500°C in air. © 1990.
引用
收藏
页码:241 / 254
页数:14
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