Ferroelectric, and piezoelectric properties of BaTi{sub 1−x}Al{sub x}O{sub 3}, 0 ≤ x ≤ 0.015

Journal Article · Tue Sep 15 00:00:00 EDT 2015 · AIP Advances

DOI:https://doi.org/10.1063/1.4930859· OSTI ID:22492345

Ali, Ahmed I. ^[1]; Khang, Nguyen Cao ^[2]

---

1. Energy Harvest-Storage Research Center and Department of Physics, University of Ulsan, Ulsan 680-749 (Korea, Republic of)
2. Center of Nano Science and Technology, Hanoi National University of Education, 122000, Hanoi (Viet Nam)

Single phase polycrystalline samples of BaTi{sub 1−x}Al{sub x}O{sub 3}, 0 ≤ x ≤ 0.015, have been prepared by a conventional powder processing method. The Rietveld refinements of X- ray powder diffraction patterns at room temperature indicate that the samples crystallize in tetragonal structure with group symmetry P4mm. Because of the oxygen vacancies, the volume of the unit cell increases with increasing x. Field emission scanning electron microscopy revealed that the particle size of pure BTO ceramics was affected by the Al content. Dielectric, ferroelectric and piezoelectric properties of pure BTO as well as Al-doped BTO were studied. It was found that the dielectric permittivity (ε′) increases significantly with increasing x while the transition from ferroelectric phase to a paraelectric phase changes slightly. The Curie-Weiss law is verified over a wide temperature range. Both ferroelectric and piezoelectric properties of BTO are enhanced by the substitution of Ti{sup 4+} by Al{sup 3+} ions. Piezoelectric strains of Al-doped BTO showed a suitable behavior for application compared with that of pure BTO compound. Finally, the results obtained in this work are discussed and compared with those for similar materials.

• OSTI ID: 22492345
• Journal Information: AIP Advances, Vol. 5, Issue 9; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINATES
BARIUM COMPOUNDS
CERAMICS
COMPARATIVE EVALUATIONS
CONCENTRATION RATIO
CURIE-WEISS LAW
DOPED MATERIALS
FERROELECTRIC MATERIALS
FIELD EMISSION
PARTICLE SIZE
PERMITTIVITY
PIEZOELECTRICITY
POLYCRYSTALS
POWDERS
SCANNING ELECTRON MICROSCOPY
STRAINS
TETRAGONAL LATTICES
TITANATES
VACANCIES
X-RAY DIFFRACTION