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Electrical and Optical Properties of NdAlO3 Synthesized by an Optimized Combustion Process

Harilal, Midhun and Nair, V. M. and Wariar, P. R. S. and Padmasree, K. P. and M. M., Yusoff and Rajan, Jose (2014) Electrical and Optical Properties of NdAlO3 Synthesized by an Optimized Combustion Process. Materials Characterization, 90. pp. 7-12. ISSN 1044-5803

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Abstract

Nanocrystals of neodymium aluminate (NdAlO3) are synthesized using an optimized single step auto-ignition citrate complex combustion process. The combustion product was characterized by X-ray diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy and Ultraviolet–visible reflection spectroscopy. The combustion product is single phase and composed of aggregates of nanocrystals of sizes in the range 20–40 nm. The NdAlO3 crystallized in rhombohedral perovskite structure with lattice parameters a = 5.3223 Å and c = 12.9292 Å. The absorption spectrum of the NdAlO3 nanocrystals shows characteristic absorption bands of the Nd atom. The polycrystalline fluffy combustion product is sintered to high density (~ 97%) at ~ 1450 °C for 4 h and the microstructure was characterized by scanning electron microscopy. The electrical properties of the sintered product were studied using dielectric measurements. The sintered NdAlO3 has a dielectric constant (εr) and a dielectric loss (tan δ) of 21.9 and ~ 10− 3 at 5 MHz, respectively.

Item Type: Article
Additional Information: Indexes in Scopus. IF: 2.076
Uncontrolled Keywords: Electronic ceramics; Combustion synthesis; Optical properties; Dielectric constant
Subjects: Q Science > QD Chemistry
Faculty/Division: Faculty of Industrial Sciences And Technology
Depositing User: mira
Date Deposited: 11 Apr 2014 04:11
Last Modified: 16 Oct 2018 03:04
URI: http://umpir.ump.edu.my/id/eprint/5326
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