NDLI: Characterization of Sintered Mixed Oxides by Photothermal Microscopy

Content Provider	Springer Nature Link
Author	Zaldivar Escola, Facundo Kempf, Rodolfo Mingolo, Nelida Martínez, Oscar Eduardo
Copyright Year	2016
Abstract	A new photothermal microscopy device is presented and used to map the thermal diffusivity of mixed oxides. The particular cases of $$\hbox {UO}_{2}+10~\%\hbox {Gd}_{2}\hbox {O}_{3}$$ and $$\hbox {UO}_{2}+7.5~\%\hbox {Dy}_{2}\hbox {O}_{3}$$ are discussed, showing how to determine the homogeneity of the prepared samples, distinguish interdiffused oxides from mixed oxides, recognize and characterize clusters, and determine the relative abundance of different species and its spatial distribution. Histograms can be generated that provide a quantitative determination of the homogeneity. Adding an independent determination of the thermal diffusivity as a function of the composition made in bulk material allows the conversion of the diffusivity map into a concentration map, providing direct quantitative determination of the homogeneity and spatial distribution in concentration units. The new device can be added as an accessory to an optical microscope entering through a standard C mount camera port. Two semiconductor lasers within the viewing spectroscopic window of any microscope (650 nm wavelength for the pump and 785 nm for the probe) that were coupled to a single-mode fiber were used, and the reflected signal was collected using the same fiber. With this construction, the resulting equipment was robust and reliable.
Starting Page	1
Ending Page	18
Page Count	18
File Format	PDF
ISSN	0195928X
Journal	International Journal of Thermophysics
Volume Number	37
Issue Number	2
e-ISSN	15729567
Language	English
Publisher	Springer US
Publisher Date	2016-01-11
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Concentration map Diffusivity map Dysprosia Interdiffused oxides Photothermal images Urania Condensed Matter Physics Mechanics Industrial Chemistry/Chemical Engineering Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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