Characterization and effect of calcination temperature on structural properties of spinel zinc aluminate synthesized via Co‐precipitation process. Issue 6 (7th April 2015)

• Record Type: Journal Article
• Authors: Mekprasart, Wanichaya; Worasawat, Suchada; Tangcharoen, Thanit; Pecharapa, Wisanu; Tsuboi, Nozomu; Wakita, Kazuki; Yamada, Akira; Shirakata, Sho; Wada, Takahiro; Niki, Shigeru; Imaizumi, Mitsuru; Hara, Kazuhiko; Uchitomi, Naotaka
• Is Part Of: Physica status solidi. Volume 12:Issue 6(2015:Jun.)
• Page Start: 624
• Page End: 627
• Publication Date: 2015-04-07
• Subjects: Solid state physics -- Congresses; Solid state physics -- Periodicals; Solid state physics; Conference proceedings; Periodicals; 530.41
• DOI: 10.1002/pssc.201400292
• Languages: English
• ISSNs: 1862-6351

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Zinc aluminate (ZnAl₂O₄) nanopowders were synthesized by co‐precipitation method using zinc chloride and aluminum chloride as starting precursors. The calcination temperature which was a crucial preparation factor was varied and its influence on relevant physical properties of the product was investigated. Structural properties of synthesized nanoparticles were investigated by X‐ray diffraction, X‐ray absorption spectroscopy, scanning electron microscope, and Raman spectroscopy. The results suggest that that ZnAl₂O₄ in spinel structure with high crystallinity can be obtained after calcination beyond specific temperature affirmed by XRD results. Raman result indicates the correlated chemical bonding relating to the formation of ZnAl₂O₄ structure. Meanwhile, the Zn K‐edge X‐ray absorption near‐edge structure (XANES) spectra of these samples with different calcination temperature obtained from the synchrotron X‐ray absorption spectroscopy measurement show the existence of accurate oxidation state for zinc ion (Zn²⁺) in the spinel crystal structure. Moreover, it is revealed that the calcination temperature has significant effect on the local environment of the zinc absorbing atoms through the interesting change of white line appearance. (© 2015 WILEY‐VCH Verlag GmbH &amp; Co. KGaA, Weinheim)</p> </abstract>