Journal article
Fast Pyroprobe-Heating-Induced Structural Changes of Y2O3:Eu Precursors and Their Optical Signatures
Journal of physical chemistry. C, Vol.116(2), pp.1687-1693
01/19/2012
Abstract
Luminescent europium-doped Y2O3 precursors are evaluated as potential ex situ thermal sensors for rapid heating events. The material is heated via pyroprobe for periods between 1 and 100 s. The morphological and optical properties of the material are measured as a function of heated temperature and dwell time. Upon heating, the material is believed to transform according to Y-2(CO3)(3) -> Y2O (CO3)(2) -> Y2O2CO3 -> Y2O3, with the transition to the crystalline Y2O3 phase occurring at about 666 degrees C. The optical spectra of the heat-treated samples reflect the presence of amorphous and crystalline components. The amorphous peak of the excitation spectra initially shifts to shorter wavelength and increases in width. With increasing temperature, a crystalline peak appears and grows in intensity while the amorphous peak disappears. By use of peak position and peak width, it is possible to monitor the temperature that the particles were exposed to.
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Details
- Title
- Fast Pyroprobe-Heating-Induced Structural Changes of Y2O3:Eu Precursors and Their Optical Signatures
- Creators
- Thandar Myint - Washington State UniversityRay Gunawidjaja - Washington State UniversityHergen Eilers - Washington State University Spokane
- Publication Details
- Journal of physical chemistry. C, Vol.116(2), pp.1687-1693
- Academic Unit
- Institute for Shock Physics
- Publisher
- Amer Chemical Soc
- Number of pages
- 7
- Grant note
- N00014-03-1-0247 / Office of Naval Research HDTRA1-10-1-0005 / Defense Threat Reduction Agency; United States Department of Defense
- Identifiers
- 99900876138601842
- Language
- English
- Resource Type
- Journal article