| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1505690 | Solid State Sciences | 2009 | 7 Pages |
Abstract
In this communication, we report on the formation of calcium hexahydroxodizincate dehydrate, CaZn2(OH)6·2H2O (CZO) powders under microwave-hydrothermal (MH) conditions. These powders were analyzed by X-ray diffraction (XRD), Field-emission gum scanning electron microscopy (FEG-SEM), ultraviolet-visible (UV-vis) absorption spectroscopy and photoluminescence (PL) measurements. XRD patterns confirmed that the pure CZO phase was obtained after MH processing performed at 130 °C for 2 h. FEG-SEM micrographs indicated that the morphological modifications as well as the growth of CZO microparticles are governed by Ostwald-ripening and coalescence mechanisms. UV-vis spectra showed that this material have an indirect optical band gap. The pure CZO powders exhibited an yellow PL emission when excited by 350 nm wavelength at room temperature.
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Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
C.S. Xavier, J.C. Sczancoski, L.S. Cavalcante, C.O. Paiva-Santos, J.A. Varela, E. Longo, M. Siu Li,