Journal article
Structural and spectroscopic characterization of irreversible phase changes in rapidly heated precursors of europium-doped titania nanoparticles
Journal of solid state chemistry, Vol.258, pp.15-23
02/01/2018
Abstract
We observe temperature-dependent phase changes in a precursor of europium-doped titania (p-Eu:TiO2) that is prepared via precipitation and is laser-heated to temperatures between 473 K and 1246 K within sub-second heating durations. The phase changes are characterized using X-ray diffraction and site-selective photoluminescence spectroscopy. We find that upon heating, the initially amorphous p-Eu:TiO2 first transforms into the anatase phase and then into a mixed anatase/rutile phase. These phase transformations change the local environment of the dopant Eu3+ ions resulting in modifications to the Eu3+ ions spectroscopic properties, with the modifications occurring for calcination temperatures above approximately 573 K following sub-second durations. These results demonstrate the temperature sensing ability of p-Eu:TiO2 nanoparticles for use in sub second heating events. Moreover, at 573 K this temperature is lower than other host materials that we have evaluated (i.e., La2O3, ZrO2 and Y2O3).
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Details
- Title
- Structural and spectroscopic characterization of irreversible phase changes in rapidly heated precursors of europium-doped titania nanoparticles
- Creators
- Ray Gunawidjaja - Washington State University SpokaneBenjamin R. Anderson - Washington State UniversityHergen Eilers - Washington State University
- Publication Details
- Journal of solid state chemistry, Vol.258, pp.15-23
- Academic Unit
- Institute for Shock Physics
- Publisher
- Elsevier
- Number of pages
- 9
- Grant note
- HDTRA1-15-1-0044 / Defense Threat Reduction Agency, Basic Research Award; United States Department of Defense; Defense Threat Reduction Agency
- Identifiers
- 99900876939501842
- Language
- English
- Resource Type
- Journal article