Infrared emissivities of Mn, Co co-doped ZnO powders

doi:10.1088/1674-1056/21/12/124205

Abstract Infrared emissivities of Zn_0.99-xMn_0.01Co_xO (x=0.00, 0.01, 0.03, 0.05) powders synthesized at different calcination temperatures by solid-state reaction are investigated. Their phases, morphologies, UV absorption spectra, and infrared emissivities are studied by XRD, SEM, UV spectrophotometer, and IR-2 Dual-Band Infrared Emissometer in a range of 8 μm-14 μm. Doped ZnO is still of wurtzite structure, and no peaks of other phases originating from impurities are detected. The optical band-gap decreases as the Co content and calcination temperature ascend, and of which the smallest optical band-gap is 2.19 eV. The lowest infrared emissivity, 0.754, is observed in Zn_0.98Mn_0.01Co_0.01O with the increase in Co concentration. The infrared emissivity experiences fluctuations with calcination temperature going up, and its minimum value is 0.762 at 1100℃.

Keywords: co-doped ZnO optical band-gap infrared emissivity solid-state reaction

Received: 25 February 2012
Revised: 31 May 2012
Accepted manuscript online:

PACS:	42.79.Wc	(Optical coatings)
	52.25.Tx	(Emission, absorption, and scattering of particles)
	71.55.Gs	(II-VI semiconductors)

Corresponding Authors: Yao Yin-Hua
E-mail: yaoyinhua2009@126.com

Cite this article:

Yao Yin-Hua (姚银华), Cao Quan-Xi (曹全喜) Infrared emissivities of Mn, Co co-doped ZnO powders 2012 Chin. Phys. B 21 124205

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