Published October 16, 2006 | Version v1
Journal article Metadata-only

Phase transition and high dielectric constant of bulk dense nanograin barium titanate ceramics

Creators

  • 1. State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084 (China)

Description

Barium titanate (BTO) ceramics with an average grain size of 8 nm were fabricated and studied. The temperature dependent Raman spectra revealed successive transitions from rhombohedral to orthorhombic, tetragonal, and cubic as the temperature increased from 87 to 673 K. Local piezoresponse force measurements indicated that the ceramics had switchable polarization at room temperature. Dielectric measurements showed a broad ferroelectric-to-paraelectric phase transition with a maximum permittivity of 1800 at 390 K. All these results suggest that ferroelectricity could remain in BTO ceramics with grain size as small as 8 nm in diameter

Additional details

Identifiers

DOI
10.1063/1.2363930;

Publishing Information

Journal Title
Applied Physics Letters
Journal Volume
89
Journal Issue
16
Journal Page Range
p. 162902-162902.3
ISSN
0003-6951
CODEN
APPLAB

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
38047081
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
BARIUM COMPOUNDS; CERAMICS; CUBIC LATTICES; FERROELECTRIC MATERIALS; GRAIN SIZE; ORTHORHOMBIC LATTICES; PERMITTIVITY; PHASE TRANSFORMATIONS; PIEZOELECTRICITY; POLARIZATION; RAMAN SPECTRA; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0273-0400 K; TEMPERATURE RANGE 0400-1000 K; TETRAGONAL LATTICES; TITANATES; TRIGONAL LATTICES
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DIELECTRIC MATERIALS; DIELECTRIC PROPERTIES; ELECTRICAL PROPERTIES; ELECTRICITY; MATERIALS; MICROSTRUCTURE; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SIZE; SPECTRA; TEMPERATURE RANGE; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS

Optional Information

Notes
(c) 2006 American Institute of Physics