Colossal dielectric constant and relaxation behaviors in Pr:SrTiO{sub 3} ceramics

Journal Article · Sat May 15 00:00:00 EDT 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3359715· OSTI ID:21476190

Cheng, Liu; Peng, Liu; Jianping, Zhou; Lina, Su; Lei, Cao ^[1]; Ying, He; Huaiwu, Zhang ^[2]

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1. College of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062 (China)
2. State Key Laboratory of Electronic Thin Film and Intergrated Devices, University of Electronic Science and Technology of China, Chengdu 610054 (China)

Sr{sub 1-x}Pr{sub x}TiO{sub 3} ceramics (0.00{<=}x{<=}0.03) were prepared by a traditional solid-state reaction method. Two relaxation processes (marked as A and B) of the Sr{sub 0.09}Pr{sub 0.01}TiO{sub 3} ceramics were investigated by analyzing the E{sub a} values obtained from the Arrhenius law. Colossal dielectric constant (CDC) was first obtained in Sr{sub 0.09}Pr{sub 0.01}TiO{sub 3} ceramics, whose permittivity was up to 3000 (1 kHz, room temperature), greater than that of pure SrTiO{sub 3} ceramics and samples with more Pr addition (x=0.02 and 0.03). This CDC behavior was related to the internal barrier layer capacitance mechanism.

• OSTI ID: 21476190
• Journal Information: Journal of Applied Physics, Vol. 107, Issue 9; Other Information: DOI: 10.1063/1.3359715; (c) 2010 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CAPACITANCE
CERAMICS
CONCENTRATION RATIO
DIELECTRIC MATERIALS
KHZ RANGE
MORPHOLOGY
PERMITTIVITY
PRASEODYMIUM COMPOUNDS
SCANNING ELECTRON MICROSCOPY
SOLIDS
STRONTIUM TITANATES
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TEMPERATURE RANGE 0273-0400 K
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ALKALINE EARTH METAL COMPOUNDS
COHERENT SCATTERING
DIELECTRIC PROPERTIES
DIFFRACTION
DIMENSIONLESS NUMBERS
ELECTRICAL PROPERTIES
ELECTRON MICROSCOPY
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MATERIALS
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OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SCATTERING
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TEMPERATURE RANGE
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