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Issue 14, 2014
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Stabilization of high temperature hexagonal phase of SrAl2O4 at room temperature: role of ZnO

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Abstract

Strontium aluminate (SrAl2O4) exhibits a monoclinic structure at room temperature (RT) and transforms to a hexagonal structure at above 650 °C, reported previously in the literature. In this article, we have shown a stable, high temperature hexagonal phase of SrAl2O4 (SAO) at RT by synthesizing a SAO–ZnO composite through a combustion technique. While SAO crystallizes in the monoclinic phase by adding 2.5 wt% of ZnO, a stable hexagonal phase of SAO at RT has been obtained for 20 wt% of ZnO. Further, the hexagonal phase of SAO transforms to a monoclinic phase after increasing the calcination temperature from 700 to 1200 °C. The role of ZnO in determining the structure and photoluminescence properties of these composites are discussed.

Graphical abstract: Stabilization of high temperature hexagonal phase of SrAl2O4 at room temperature: role of ZnO

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Publication details

The article was received on 11 Oct 2013, accepted on 23 Dec 2013 and first published on 02 Jan 2014


Article type: Paper
DOI: 10.1039/C3DT52869C
Citation: Dalton Trans., 2014,43, 5309-5316
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    Stabilization of high temperature hexagonal phase of SrAl2O4 at room temperature: role of ZnO

    V. P. Singh, S. B. Rai, H. Mishra and C. Rath, Dalton Trans., 2014, 43, 5309
    DOI: 10.1039/C3DT52869C

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