J. Mater. Sci. Technol. ›› 2009, Vol. 25 ›› Issue (05): 695-698.

• Articles • 上一篇    下一篇

NiO-Cr2O3-TiO2红外辐射涂层的制备与研究Preparation and Study of NiO-Cr2O3-TiO2 Infrared Radiation Coating

陈武1;叶卫平2;程旭东2;段伟2;毛昉2;励德亮2   

  1. 1. 钢铁研究总院青岛海洋腐蚀研究所
    2. 武汉理工大学
  • 收稿日期:2008-06-02 修回日期:2008-09-27 出版日期:2009-09-28 发布日期:2009-10-10
  • 通讯作者: 叶卫平

Preparation, Microstructure and Properties of NiO-Cr2O3-TiO2 Infrared Radiation Coating

Wu Chen, Weiping Ye, Xudong Cheng, Wei Duan, Fang Mao, Deliang Li   

  1. 1) State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
    2) College of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
  • Received:2008-06-02 Revised:2008-09-27 Online:2009-09-28 Published:2009-10-10
  • Contact: weiping ye

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摘要：

以NiO、Cr2O3和TiO2为主要成分，采用喷雾干燥法制成球形团聚粉末，将该粉末在还原气氛1200℃下进行焙烧，获得流动性好的喷涂用粉。采用等离子喷涂工艺，在铜片基体上制备厚度≥50μm色泽纯黑且均匀的涂层。红外辐射性能测试该涂层红外法向全发射率在600℃时高达0.91。经X射线衍射图谱分析，涂层中的(Cr0.88Ti0.12)2O3和尖晶石结构的NiCr2O4的形成是产生高效红外辐射的主要原因。涂层经室温至600℃热震实验表明其结构和性能稳定。

关键词: 喷雾干燥;团聚粉末;等离子喷涂;法向全发射率

Abstract:

The spherical agglomerated particles were fabricated by spray drying with the powders of NiO, Cr2O3 and TiO2. Plasma spray power, which has good property of flowability, was acquired by heat treatment from the particles at 1200°C in the reducing atmosphere. Dark and uniform coating of More than 50 μm thick was deposited on the copper sheet substrate by plasma spraying. It is found that the infrared normal total emissivity of the coating is up to 0.91 at 600°C by infrared radiation testing. The X-ray diffraction analysis shows that the formation of (Cr0:88Ti0:12)2O3 and spinel structural NiCr2O4 in the coating is the main reason for high efficient infrared radiation, and the phase structure and performance of coating is favorable under the thermal cycle between room temperature and 600±C.

Key words: Spray drying, Agglomerated particles, Plasma spraying, Normal total emissivity