Improvements in vacuum collector tubes with graded AI-N/AI absorbing surfaces

Suping Hou; Zuqing Xue; Yueyan Shi; Zhiqiang Yin

doi:10.1117/12.130490

25 November 1992 Improvements in vacuum collector tubes with graded AI-N/AI absorbing surfaces

Suping Hou, Zuqing Xue, Yueyan Shi, Zhiqiang Yin

Proceedings Volume 1727, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Selective Materials, Concentrators and Reflectors, Transparent Insulation and Superwindows; (1992) https://doi.org/10.1117/12.130490
Event: Optical Materials Technology for Energy Efficiency and Solar Energy, 1992, Toulouse-Labege, France

Abstract

A batch coater for depositing selective absorbing surfaces on the outside of 34 inner tubes was set up using cylindrical magnetron sputtering technique. The appropriate process has been carried out to produce graded Al-N/Al selective absorbing surfaces with optimum optical properties. The average solar absorptance of the surface was found to be about 0. 923 and emittance around 0. 06 ( lOOt),after evacuation. Three evacuation systems of 5 0 tubes each were designed and constructed with automatic evacuation process.The as-produced pressure in the tube in lower than 1 X 1O3Pa.

Citation Download Citation

Suping Hou, Zuqing Xue, Yueyan Shi, and Zhiqiang Yin "Improvements in vacuum collector tubes with graded AI-N/AI absorbing surfaces", Proc. SPIE 1727, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Selective Materials, Concentrators and Reflectors, Transparent Insulation and Superwindows, (25 November 1992); https://doi.org/10.1117/12.130490

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