CoFe2O4基棕褐色太阳能吸收涂层的制备及性能  

Preparation and properties of CoFe_2O_4 based spinel brown solar absorber coatings

作　　者：陈宝辉 陆佳政 马鹏军[2] 金灵华 刘刚[2] 方针 CHEN Baohui;LU Jiazheng;MA Pengjun;JIN Linghua;LIU Gang;FANG Zhen(1State Grid Hunan Electric Power Corporation Disaster Prevention and Reduction Center,Changsha 410007,Hunan, China;Research&Development Center for Eco-chemistry and Eco-materials,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730030,Gansu,China)

机构地区：[1]国网湖南省电力公司防灾减灾中心,电网输变电设备防灾减灾国家重点实验室,湖南长沙410007 [2]中国科学院兰州化学物理研究所环境材料与生态化学发展中心,甘肃兰州730030

出　　处：《化工进展》2018年第A01期141-146,共6页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(51402315);国家电网公司项目(5216A01600W0)。

摘　　要：采用溶液凝胶法在400℃的低温条件下制备出单相CoFe_2O_4尖晶石型陶瓷颜料。通过XRD、SEM及颜料的红外反射光谱系统的研究了煅烧温度对陶瓷颜料的晶型结构、晶粒尺寸、晶粒形貌以及热发射值的影响。随后,将合成的CoFe_2O_4尖晶石型陶瓷颜料与有机树脂、有机助剂复配,形成吸光涂料。采用操作简单,成本低廉、容易实现大面积制备的涂料喷涂法将所制备的吸光涂料喷涂到高红外反射的金属铝基底上,制备出尖晶石型棕褐色陶瓷太阳能吸光涂层,其太阳能吸收值αs=0.768～0.818,热发射值为ε100=0.315～0.398。棕褐色的涂层也可以满足太阳能户外建筑对色彩的需求。此外,接触角测试表明CoFe_2O_4尖晶石型陶瓷涂层平均水的接触角θe>106°,这使得该涂层具备一定的自清洁性能,能有效地应对户外湿度环境对涂层的侵蚀。Single-phase CoFe2O4 ceramics pigments have been obtained at 400℃by sol-gel method.The effect of annealing temperature on crystal form,grain size,grain morphology,and thermal emittance has been investigated by XRD spectra,SEM analysis and IR reflectance spectra of ceramics pigments.Ultimately,spinel-type CoFe2O4 ceramics pigments,organic resin,as well as organic additives have been mixed to fabricate the solar absorber paint.Subsequently,the solar absorber paint has been deposited on high infrared reflectance aluminum substrates to prepare spinel-type brown ceramic solar absorber coating with solar absorptance values ofαs=0.768-0.818,thermal emittance values ofε100=0.315-0.398.Furthermore,with an average water contact angle values exceeding 106°,CoFe2O4 spinel-type ceramics coatings show the self-cleaning property.

关 键 词：太阳能 凝胶 COFE2O4 喷涂法 烧结 光学性能 自清洁性能 

分 类 号：TQ63[化学工程—精细化工]