Effects of Ag–La codoping on structure and electrical properties of BaTiO3 powder

Effects of Ag–La codoping on structure and electrical properties of BaTiO3 powder Ag–La codoped BaTiO3 powders were prepared by sol–gel technology after the preparation of Ag-doped and La-doped BaTiO3 powders. Variations in the structure, constitution, morphology, and electrical properties of the modified BaTiO3 powders were characterized. It can be concluded that Ag–La codoping decreases the resistivity of the modified powders more significantly than Ag doping and La doping, respectively. The sample with the lowest resistivity was obtained by codoping with 0.1 at.% Ag and 0.3 at.% La, where the resistivity decreased to 7.13 × 102 Ω m from the value of 4.30 × 109 Ω m of the undoped powder. X-ray diffractometry (XRD) and Fourier-transform infrared (FTIR) analyses indicate that the main phase of the codoped powders transitions from tetragonal to cubic with increasing La doping content. Scanning electron microscopy (SEM) observations illustrate that codoping makes the particles distribute more equably. The relationship between the resistivity and the structure of the doped BaTiO3 powders is discussed based on defect chemistry. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Effects of Ag–La codoping on structure and electrical properties of BaTiO3 powder

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Publisher
Springer Journals
Copyright
Copyright © 2012 by Springer Science+Business Media B.V.
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-012-0791-7
Publisher site
See Article on Publisher Site

Abstract

Ag–La codoped BaTiO3 powders were prepared by sol–gel technology after the preparation of Ag-doped and La-doped BaTiO3 powders. Variations in the structure, constitution, morphology, and electrical properties of the modified BaTiO3 powders were characterized. It can be concluded that Ag–La codoping decreases the resistivity of the modified powders more significantly than Ag doping and La doping, respectively. The sample with the lowest resistivity was obtained by codoping with 0.1 at.% Ag and 0.3 at.% La, where the resistivity decreased to 7.13 × 102 Ω m from the value of 4.30 × 109 Ω m of the undoped powder. X-ray diffractometry (XRD) and Fourier-transform infrared (FTIR) analyses indicate that the main phase of the codoped powders transitions from tetragonal to cubic with increasing La doping content. Scanning electron microscopy (SEM) observations illustrate that codoping makes the particles distribute more equably. The relationship between the resistivity and the structure of the doped BaTiO3 powders is discussed based on defect chemistry.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Sep 12, 2012

References

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