A laser spectroscopic study of Nd-doped Zirconia

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High-surface-area rare-earth (RE) modified zirconia powders prepared by solution methods can be used as catalytic support of noble metals and as electrolyte oxygen sensors in automobile exhaust-emission- control systems. Previous neutron-scattering study showed that substituting Zr with trivalent RE ions not only stabilizes the cubic and tetrgonal phases over a wide range of temperatures but also creates oxygen vacancies in the RE-Zr oxide solid solution. This work focuses on Nd fluorescence in Nd{sub 0.1}Zr{sub 0.9}O{sub 1.95} powders under laser excitation of the Nd{sup 3+} ground state to the {sup 4}G{sub 7.2} states. Distinct features were found at 8K in the ... continued below

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11 p.

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Loong, C.-K.; Liu, G.K.; Ozawa, M. & Suzuki, S. June 1, 1996.

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Description

High-surface-area rare-earth (RE) modified zirconia powders prepared by solution methods can be used as catalytic support of noble metals and as electrolyte oxygen sensors in automobile exhaust-emission- control systems. Previous neutron-scattering study showed that substituting Zr with trivalent RE ions not only stabilizes the cubic and tetrgonal phases over a wide range of temperatures but also creates oxygen vacancies in the RE-Zr oxide solid solution. This work focuses on Nd fluorescence in Nd{sub 0.1}Zr{sub 0.9}O{sub 1.95} powders under laser excitation of the Nd{sup 3+} ground state to the {sup 4}G{sub 7.2} states. Distinct features were found at 8K in the {sup 4}I{sub 9/2}{r_arrow}{sup 4}G{sub 7/2} excitation and {sup 4}F{sub 3.2}{r_arrow}{sup 4}I{sub 9/2} emission spectra using two sets of incident and emission frequencies, respectively. Results are discussed in terms of site-sensitive local structures surrounding the Nd ions in the two-phased oxide structure.

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11 p.

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OSTI as DE96009452

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  • RERC-21: 21. rare earth research conference, Duluth, MN (United States), 7-12 Jul 1996

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  • Other: DE96009452
  • Report No.: ANL/IPNS/CP--89076
  • Report No.: CONF-960796--1
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 238354
  • Archival Resource Key: ark:/67531/metadc666124

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  • June 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Dec. 14, 2015, 4:54 p.m.

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Loong, C.-K.; Liu, G.K.; Ozawa, M. & Suzuki, S. A laser spectroscopic study of Nd-doped Zirconia, article, June 1, 1996; Illinois. (digital.library.unt.edu/ark:/67531/metadc666124/: accessed November 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.