Nanometer thick thermochromic film based on K-doped manganite oxide prepared by magnetron sputtering

JOURNAL OF ALLOYS AND COMPOUNDS

卷:704

Article

Lu, Teng¹  Fan, Desong¹  Li, Qiang¹  Fan, Xiang² 

[1] Nanjing Univ Sci & Technol, Sch Energy & Power Engn, MIIT Key Lab Thermal Control Elect Equipment, Nanjing 210094, Jiangsu, Peoples R China

[2] Shanghai Inst Space Power Sources SISP, Shanghai 200245, Peoples R China

关键词: Thermochromic film;    Variable emittance;    Solar absorptivity;    Magnetron sputtering;   

DOI  :  10.1016/j.jallcom.2017.02.035

来源: Elsevier

【 摘 要 】

For seeking a lightweight thermochromic film acting as a smart radiation device in thermal control system for spacecraft, the (La,Ca,K)MnO3 +/-delta films with different thicknesses were deposited on Si(100) substrate by magnetron sputtering method with a target which was synthesized by a sol-gel method. The crystal structure and micro-morphology of these films are investigated. The results reveal that all films form an orthorhombic perovskite structure, and it undergoes a Volmer-Weber growth mode with the increased thickness. Temperature-dependent infrared reflectivity and emittance are investigated. Spectra data indicate that reflectivity of all films has a decreased trend with increasing temperature. In the temperature range of 173-373 K, the K-doped thermochromic films show a large emittance increment near 0.36 with film thickness only 321 nm. All of these results show that the thermochromic film has a great potential to be applied to a more lightweight and cost-effective thermal control device in spacecraft with an excellent radiation performance. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

Free