Solid state method has been used as an efficient method to synthesize blue pigment CoAl 2 O 4 at a temperature of 800°C. The products were characterized by powder X-ray diffraction (XRD), Fourier transformer infrared spectroscopy (FTIR), UV-Visible diffuse reflectance spectroscopy (DRS) and luminescent spectroscopy. X-ray diffraction pattern confirmed the formation of single phase CoAl 2 O 4 . Optical properties of CoAl 2 O 4 ceramic shows an energy band gap in the range of 3.10eV. The emission spectra of spinel CoAl 2 O 4 in the visible region confirmed the presence of tetrahedral coordinated Co 2+ ions. © 2015 AIP Publishing LLC.

Ruban Kumar A

Department of Physics

School of Advanced Sciences

Vellore Campus

Agilandeswari K

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Synthesis, characterisation, optical and luminescence properties of CoAl2O4

AIP Conference Proceedings

Ultrasonics Sonochemistry

Sonochemical synthesis of cobalt aluminate nanoparticles under various preparation parameters

Cobalt aluminate (CoAl2O4) nanopowders were synthesized by reverse microemulsion process using cyclohexane, a nonionic surfactant, and aqueous solutions of cobalt (II) nitrate hexahydrate and aluminum nitrate nonahydrate. The influence of water to surfactant molar ratio on the size of powders has been studied. The X-ray diffraction analysis shows that the powders calcined at 1000 °C have single phase cubic spinel structure. The average size of the particles increases with increasing water to surfactant molar ratio. The mean diameter of the particles varies between 42 and 57 nm. The Fourier transform infrared spectra also confirm the formation of CoAl2O4. Magnetization study reveals that the CoAl 2O4 sample exhibits superparamagnetic behavior. © 2010 Elsevier B.V. All rights reserved.

Journal of Alloys and Compounds

Size effect on the magnetic property of CoAl2O4 nanopowders prepared by reverse micelle processing

Applied Physics Letters

CoAl2O4–Fe2O3 p-n nanocomposite electrodes for photoelectrochemical cells

Bulletin of the Korean Chemical Society

The Preparation of Blue CoAl2O4Powders by the Malonate Method: The Effect of the Amount of Malonic Acid Used, the Formation Pathway of CoAl2O4Crystallites and the Characteristics of the Prepared Powders

Journal of the European Ceramic Society

Synthesis and characterization of nanocrystalline CoAl2O4 spinel powder by low temperature combustion

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