Journal of South China University of Technology (Natural Science Edition) ›› 2014, Vol. 42 ›› Issue (6): 46-50.doi: 10.3969/j.issn.1000-565X.2014.06.008

• Materials Science & Technology • Previous Articles     Next Articles

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

Zhao Li- ying1 Liu Ping- an1 Zeng Fan- cong2 Liao Ying- feng2   

  1. 1.School of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China;2.Guangdong Technical Center for Superhard and Electromagnetic Materials Researching,Foshan Kangtaiwei Advanced MaterialsCo.Ltd.,Foshan 528216,Guangdong,China
  • Received:2013-07-19 Revised:2014-04-01 Online:2014-06-25 Published:2014-05-01
  • Contact: 刘平安(1969-)，男，副教授，主要从事高性能无机材料及电磁功能材料研究． E-mail:paliu@scut.edu.cn
  • About author:赵立英(1978-)，男，博士，工程师，主要从事电磁功能材料和节能环保新材料研究．E-mail:feiying99998888@163．com
  • Supported by:

    粤港关键领域重点突破项目(2010Z5107)

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Abstract:

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 fabri-cate infrared radiant coatings with high thermal shock resistance.Finally,the microstructure,physicochemicalproperties and thermal shock resistance of the coatings were investigated.The results show that (1) both the origi-nal and the composite infrared radiant powders exhibit excellent infrared radiation capability,for instance,they areof a room- temperature whole- band infrared emissivity of 0.90 and 0.91,respectively,as well as an infrared emis-sivity in narrow bands of more than 0.92; (2) the heat absorption and exchange capacity of high alumina brickwith composite infrared radiant coatings on its surface dramatically improves,for instance,the heat storage capacityimproves by 4.99% at 600℃ and by 20.98% at 1200℃; and (3) the thermal expansion coefficient of the com-posite infrared radiant coatings matches well with that of high alumina brick,which means that the composite coatingspossess excellent thermal shock resistance.

Key words: energy- saving coating, thermal shock- resistance, infrared emissivity, heat storage capacity