高热震稳定性红外辐射节能涂料的制备与性能  

Preparation and Properties of High Thermal Shock-Resistant Infrared Radiant Energy-Saving Coatings

作　　者：赵立英[1] 刘平安[1] 曾凡聪 廖应峰 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640 [2]佛山市康泰威新材料有限公司广东省超硬与电磁功能材料工程技术研究开发中心,广东佛山528216

出　　处：《华南理工大学学报（自然科学版）》2014年第6期46-50,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：粤港关键领域重点突破项目(2010Z5107)

摘　　要：以MnO2、Fe2O3、CuO、Co2O3等过渡金属氧化物为原料,经高温固相反应形成具有尖晶石结构的红外辐射粉料,并进一步与莫来石高温焙烧制备复合红外辐射粉料,然后与硅酸盐粘接剂混合制备了高热震稳定性的红外辐射涂料.对材料的结构、理化性能以及耐热震稳定性进行了研究,结果表明:所制备的具有尖晶石结构的红外辐射粉料和复合红外辐射粉料均具有优良的红外辐射性能,室温全波段辐射率分别为0.91和0.90,各个波段内的法向辐射率均在0.92以上;涂覆复合红外辐射涂料后,高铝砖的辐射吸热和热交换能力明显增加,600℃时蓄热能力提高4.99%,1200℃时蓄热能力提高20.98%;复合红外辐射涂料的膨胀系数和基体膨胀系数匹配性较好,具有良好的耐热震稳定性.A novel type of infrared radiant powders with spinel structure was prepared via the solid-state reaction of MnO2, Fe2O3 , CuO and Co2O3 powders at high temperature, and was mixed with mullite to obtain composite infra- red radiant powders via high-temperature calcination. Then, the product was mixed with silicate adhesive to fabricate infrared radiant coatings with high thermal shock resistance. Finally, the microstructure, physieochemieal properties and thermal shock resistance of the coatings were investigated. The results show that （ 1 ） both the original and the composite infrared radiant powders exhibit excellent infrared radiation capability, for instance, they are of a room-temperature whole-band infrared emissivity of 0.90 and 0.91, respectively, as well as an infrared emissivity in narrow bands of more than 0.92; （2） the heat absorption and exchange capacity of high alumina brick with composite infrared radiant coatings on its surface dramatically improves, for instance, the heat storage capacity improves by 4.99% at 600℃ and by 20.98% at 1200℃ ; and （3） the thermal expansion coefficient of the composite infrared radiant coatings matches well with that of high alumina brick, which means that the composite coatings possess excellent thermal shock resistance.

关 键 词：节能涂料 耐热震稳定性 红外辐射率 蓄热能力 

分 类 号：TB34[一般工业技术—材料科学与工程] TQ638[化学工程—精细化工]