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Spectroscopy Letters
An International Journal for Rapid Communication
Volume 34, 2001 - Issue 2
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Original Articles

FT-RAMAN SPECTROSCOPIC STUDY OF Pb1−xCaxTiO3 NANOCRYSTALS

Qiang Liang-Sheng Department of Applied Chemistry, Harbin Institute of Technology, Harbin, 150001, China
,
Tang Dong-yan Department of Applied Chemistry, Harbin Institute of Technology, Harbin, 150001, China
,
Zhen Xi-he Department of Applied Chemistry, Harbin Institute of Technology, Harbin, 150001, China
&
Fu Hong-gang Department of Applied Chemistry, Harbin Institute of Technology, Harbin, 150001, China
Pages 159-165 | Received 17 Apr 2000, Accepted 15 Jul 2000, Published online: 15 Feb 2007
 
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Abstract

FT-Raman Spectra of Pb1−x Ca x TiO3 nanocrystals with different lanthanum amounts were measured at 288 K and 378 K. Several nanocrystals of Pb0.85Ca0.15TiO3 with different grain size were also prepared at 288 K. The effects of the amount of lanthanum, grain size and temperature on phonon frequency were discussed in details. Furthermore, the conclusion that lattice expansion's presentation in PCT nanocrystals can be obtained by the frequency comparison of PCT nanocrystal of x ≥ 0.2 with ceramic doped with the same amount of calcium.

Acknowledgments

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