Crystallization Behavior and Infrared Radiation Properties of Copper Ferrite-Doped MgO-Al₂O₃-SiO₂ Ceramics

Abstract:

MgO-Al₂O₃-SiO₂ ceramics were recently explored as infrared radiance materials to provide an environmental friendly energy candidate for industrial heating and drying. Cu ferrite was selected to dope MgO-Al₂O₃-SiO₂ ceramics, forming a series of composite ceramics via solid-state reaction method to enhance the infrared radiation properties. The phase identification and morphologies of the samples were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM) techniques. The infrared emissivity was examined by Fourier transform infrared (FTIR) spectrometer. The results showed that an improvement of infrared radiation properties can be achieved by doping Cu ferrite in MgO-Al₂O₃-SiO₂ ceramics. With increasing the dopant content from 0 wt % to 10.0 wt %, the crystallization behavior changed accordingly. A positive correlation was found between the infrared emissivity and the lattice strain. The highest infrared emissivity (0.91±0.01) was obtained after sintering at 1150 °C for 2 h with Cu ferrite content was 7.5 wt %, in which the maximum lattice strain (0.282 %) occurred. MgO-Al₂O₃-SiO₂ ceramics doped with Cu ferrite have potential for the application of infrared heating and drying fields.

• Periodical: Advanced Materials Research (Volumes 860-863)
• Pages: 881-884
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.860-863.881
• Online since: December 2013
• Authors: Xiao Yan Wu, Hong Bing Yu*, Heng Dong
• Keywords: Ceramic, Crystalline Phase, Infrared Emissivity, Lattice Strain, Solid-State Reaction

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