Preparation and Infrared Reflection Performance of Al/Cr2O3 Composite Particles

doi:10.3724/SP.J.1077.2013.12395

Abstract

Abstract:

The composite pigments were prepared by co-precipitation coated Cr₂O₃ on the surface of flake aluminum powders. Phase structure, surface morphology and reflectance spectra of the composite pigment were characterized by XRD, FE-SEM, UV/VIS/NIR spectroscopy and Fourier transform infrared spectrometer. The result shows that the influence of cover treatment with Cr₂O₃ on the reflectance spectra at various radiation wavelengths is different. The shorter the wavelength is, the stronger the influence is. When the molar ratio of Cr³⁺to Al is 0.2:1.0, compared with the uncoated flake aluminum powders, its average reflectance of visible spectrum and brightness (L*) drop to 50% and 15, respectively. However, the infrared emissivity of 8-14 μm waveband increases less than 10%. It mainly ascribes to the difference of surface roughness and absorption coefficient for different radiation wavelengths. Thus, the composite particles play a vital role in designing the low infrared emissivity coating.

Key words: flake aluminum, Cr₂O₃, emissivity, brightness, coating

CLC Number:

TQ637

YUAN Le, WENG Xiao-Long, LU Hu, DENG Long-Jiang. Preparation and Infrared Reflection Performance of Al/Cr₂O₃Composite Particles[J]. Journal of Inorganic Materials, 2013, 28(5): 545-550.

Figures/Tables 9

Table 1 Compositions of the raw materials

Samples	n(Cr³⁺): n(Al)	Composition/g			Precipitant/g
Samples	n(Cr³⁺): n(Al)	Flake Al	Cr(ON₃)₃·9H₂O	SDBS	NH₃·H₂O (25wt%)
S1	1:0	0	16	1.12	16.32
S2	1:1	1.08	16	1.12	16.32
S3	0.4:1.0	2.70	16	1.12	16.32
S4	0.2:1.0	5.40	16	1.12	16.32
S5	0.1:1.0	10.8	16	1.12	16.32

Fig. 1 TG curves of Al pigment and Al/Cr(OH)3 precursor

Fig. 2 XRD patterns of the Al/Cr2O3 composite powders

Fig. 3 SEM photographs of Cr2O3, Al/Cr2O3 and Al powders

Fig. 4 Diffuse reflectance Vis-NIR spectra of Al and Al/Cr2O3 powders

Fig. 5 The effects of Cr2O3 coating on the reflectance of the Al/Cr2O3 powders

Fig. 6 Diffuse reflectance IR spectra of Cr2O3, Al/Cr2O3 and Al powders in 8~14 μm waveband

Table 2 Emissivity and brightness of Al/Cr2O3 powders

Samples	S1	S2	S3	S4	S5	Al
ε_8-14μm	0.93	0.71	0.67	0.57	0.56	0.52
CIE L*	21.0	47.7	54.0	62.3	72.1	77.1

Fig. 7 Photo of flake Al powder and Al/Cr2O3 compositepowder (×20)

References 16

[1]	Uemoto K L, Sato N M N, John V M. Estimating thermal performance of cool colored paints. Energy and Buildings, 2010, 42(1): 17-22.
[2]	Tomas H, Tina N H, Eva H K, et al. Development of Low-emissive Camouflage Paint: Final Report. Swedish Defence Research Agency, 2005: 1-17.
[3]	Babrekar Harshada A, Kulkarni Naveen V, Jog Jyoti P, et al. Influence of filler size and morphology in controlling the thermal emissivity of aluminium/polymer composites for space applications. Mater. Sci. Eng. B, 2010, 168(1/2/3): 40-44.
[4]	Manara J, Reidinger M, Rydzek M, et al. Polymer-based pigmented coatings on flexible substrates with spectrally selective characteristics to improve the thermal properties. Progress in Organic Coatings, 2011,70(4): 199-204.
[5]	ZHANG Jie, WEI Zi-Dong, WANG Chun-hui, et al. Near infrared reflectance of the doped Cr2O3 pigment. Journal of Inorganic Materials, 2010, 25(12): 1303-1306.
[6]	WU Xiao-Wei, FENG Yu-Jie, WEI Han, et al. Preparation of IR and microwave absorbing barium ferrite material by electroless Ni-P Plating. Journal of Inorganic Materials, 2009, 24(1): 97-102.
[7]	ZHOU Jian-Hua, WANG Tao, WANG Dao-Jun, et al. Preparation and infrared emissivity of glucose-based carbon coated ZnFeO. Journal of Inorganic Materials, 2009, 24(5): 1045-1048.
[8]	Zhang Yingchao, Ye Hongqi, Liu Hui, et al. Preparation and characterisation of aluminium pigments coated with silica for corrosion protection. Corrosion Science, 2011, 53(5): 1694-1699.
[9]	Patrice Bujard. Flake-form Pigments Based on Aluminum. US Patnet, 0034787, 2006.
[10]	Kiehl A, Greiwe K. Encapsulated aluminium pigments. Progress in Organic Coatings, 1999, 37(3/4): 179-183.
[11]	Wolfgang Reisser, Denise Mebarek. Colored Aluminum Pigments Process for Producing Them and Their Use. US Patent, 5931996, 1999.
[12]	Sadashiv K. Nadkarni.Coloring Aluminum Flakes. US Patent, 5261955, 1993.
[13]	CHEN Jiao, HUANG Xiao-Gu, HAN Peng-De, et al. Preparation and multiple-band stealth properties of Al/Cr2O3 composite particles. Journal of Inorganic Materials, 2010, 25(12): 1298-1302.
[14]	Coulter Kent E, Mayer Thomas, Phillips Roger W, et al. Bright Metal Flake Based Pigments. US Patent, 6383638 B1, 2002.
[15]	Bohren Craig F, Huffman Donald R. Absorption and Scattering of Light by Small Paticles. New York: Wiley Professional Paperback Edition Published, 1998: 64-69.
[16]	张建奇,方小平. 红外物理. 西安: 西安电子科技大学出版社, 2004: 37-40.

Preparation and Infrared Reflection Performance of Al/Cr₂O₃Composite Particles

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