Effect of Zn:Al Ratio and Calcination Time on Structural Properties of Zn-Al-O Compound
| Autor: | Suchada Worasawat, Wisanu Pecharapa, Thanit Tangcharoen, Wanichaya Mekprasart |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Scanning electron microscope Mechanical Engineering Aluminate Spinel Metallurgy Oxide chemistry.chemical_element Zinc engineering.material law.invention chemistry.chemical_compound symbols.namesake Crystallinity chemistry Mechanics of Materials law engineering symbols General Materials Science Calcination Raman spectroscopy Nuclear chemistry |
| Zdroj: | Key Engineering Materials. :535-538 |
| ISSN: | 1662-9795 |
| DOI: | 10.4028/www.scientific.net/kem.675-676.535 |
| Popis: | Zn-Al-O compounds were successfully synthesized via co-precipitation method at pH 8 followed by calcination process at 900 oC. Influence of different precursor (Zn:Al) ratio and calcination period on their structural properties and formation have been investigated. Varying Zn:Al ratio was conducted at 2:1, 1:1, 1:2 and 1:4 with different calcination time at 0, 2, 4, and 6 h. Phase transformation and morphologies were characterized by X-ray diffraction and field-emission scanning electron microscope. Moreover, chemical bonding of Zn-Al-O compound was analyzed by Raman spectroscopy. The results indicated that chemical bonding between Zn-Al oxide evidentially occurred in all samples in composite form and spinel structure. In addition, the amount of Al content considerably contributes to significant aggregation in zinc aluminate (ZnAl2O4) spinel crystalline phase affirmed by XRD result. Meanwhile, SEM images reveal high crystallinity and strong formation of the compound obtained by prolong calcined period. |
| Databáze: | OpenAIRE |
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