Mekprasart, Wanichaya

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Mekprasart, Wanichaya
Alternative Name
MEKPRASART, Wanichaya
Mekprasart, W.
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Email
wanichaya.me@kmitl.ac.th

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    Item type:Publication,
    Effect of Zn:Al ratio and calcination time on structural properties of Zn-Al-O compound
    (2016-01-01)
    Mekprasart, Wanichaya
    ;
    Worasawat, Suchada
    ;
    Tangcharoen, Thanit
    ;
    Pecharapa, Wisanu
    Zn-Al-O compounds were successfully synthesized via co-precipitation method at pH 8 followed by calcination process at 900 °C. Influence of different precursor (Zn:Al) ratio and calcination time 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 (ZnAl<inf>2</inf>O<inf>4</inf>) spinel crystalline phase affirmed by XRD result. Meanwhile, SEM images reveal high crystallinity and strong formation of the compound obtained by prolong calcined period.