Evaporated chromium black selective solar absorbers

摘要: Abstract Chromium blacks made by evaporating chromium metal in low pressures of argon gas, when deposited onto highly reflecting copper substrates, exhibit solar selectivity. The optical and electrical properties the structure black films are described, absorption mechanism is discussed. prepared at 1 2 Torr 3 compared. This selective surface easily manufactured may be suitable for operation temperatures up to 200 °C vacuum.