A laser spectroscopic study of Nd-doped zirconia

被引：3

作者：

Loong, CK ^{[1
]}

Liu, GK ^{[1
]}

Ozawa, M ^{[1
]}

Suzuki, S ^{[1
]}

机构：

[1] NAGOYA INST TECHNOL,TAJIMI,GIFU 507,JAPAN

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1997年 / 250卷 / 1-2期

关键词：

site-selective spectroscopy; fluorescence; rare-earth modified zirconia; zirconia catalytic support;

D O I：

10.1016/S0925-8388(96)02549-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 an automobile exhaust-emission-control system. A previous neutron-scattering study showed that substituting zirconium with trivalent RE ions not only stabilizes the cubic and tetragonal phases over a wide range of temperatures, but also creates oxygen vacancies in the RE-Zr oxide solid solution. This work focuses on the fluorescence of Nd in Nd0.1Zr0.9O1.95 powders under laser excitation of the Nd3+ ground state to the (4)G(7/2) states. Distinct features were observed at 8 K in the I-4(9/2) --> (4)G(7/2) excitation and F-4(3/2) --> I-4(9/2) emission spectra using two sets of incident and emission frequencies, respectively. The results are discussed in terms of site-sensitive local structures surrounding the Nd ions in the two-phased oxide structure.

引用

页码：352 / 355

页数：4

共 6 条

[1]

Bleier A., 1986, MATER RES SOC S P, V73, P71

[2]

LOONG CK, 1995, J CATAL, V157, P634

[3] PHASE EXAMINATION OF 5 MOL-PERCENT ND2O3-DOPED ZRO2 FROM A COPRECIPITATION PROCESS [J].