Near Infrared Reflectance of the Doped Cr2O3 Pigment

doi:10.3724/SP.J.1077.2010.01303

Journal of Inorganic Materials ›› 2010, Vol. 25 ›› Issue (12): 1303-1306.DOI: 10.3724/SP.J.1077.2010.01303

• Research Paper • Previous Articles Next Articles

Near Infrared Reflectance of the Doped Cr₂O₃ Pigment

ZHANG Jie^1,2, WEI Zi-Dong^1,2, WANG Chun-Hui³, BIAN Peng³, WENG Xiao-Long³

(1. The State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China; 2. School of Material Science and Engineering, Chongqing University, Chongqing 400044, China; 3. State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China)

Received:2010-03-18 Revised:2010-07-05 Published:2010-12-20 Online:2010-11-24
Supported by:
National Nature Science Foundation of China (60877062)

Abstract

Abstract: Fe, Ti and Al-Ti binary-doped Cr₂O₃ pigments were prepared by solid-phase synthesis process. The phase structure, visible / near-infrared reflectance (NIR), color parameters were tested and characterized by X-ray diffraction (XRD), UV/VIS/NIR spectroscopy, Color CIE Chromaticity analysis software. The correlation between NIR reflectance, color and pigment structure features of doped Cr₂O₃ pigments was initially discussed. The results showed that all doped Cr₂O₃had a single-phase corundum structure. However their grain sizes varied with doped elements relative to the undoped Cr₂O₃. It was found that the NIR of doped Cr₂O₃decreased with adulteration of Fe but increased significantly with adulteration of Ti. For Al/Ti binary-doped Cr₂O₃ pigment with composition of 3.4wt% Al(OH)₃ and 1.07wt% TiO₂, the average reflectance in the wavelengths ranging from 700-2500 nm and maximum reflectance at 2500nm were 87.5% and 99%, respectively. The significant NIR enhancement of Ti-doped Cr₂O₃ was attributed to its larger grain size and change of Cr³⁺ local electronic environment.

Key words: Cr₂O₃, pigment, dope, NIR reflectance

CLC Number:

TQ174

ZHANG Jie, WEI Zi-Dong, WANG Chun-Hui, BIAN Peng, WENG Xiao-Long. Near Infrared Reflectance of the Doped Cr₂O₃ Pigment[J]. Journal of Inorganic Materials, 2010, 25(12): 1303-1306.

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Near Infrared Reflectance of the Doped Cr₂O₃ Pigment

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