Effect of mechanical alloying synthesis process on the dielectric properties of (Bi{sub 0.5}Na{sub 0.5}){sub 0.94}Ba{sub 0.06}TiO{sub 3} piezoceramics

Journal Article · Sat Aug 15 00:00:00 EDT 2015 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2015.03.047· OSTI ID:22475853

Amini, Rasool ^[1]; Shams, Seyyedeh Fatemeh ^[2]; Alizadeh, Morteza; Ardakani, Hamed Ahmadi ^[1]

---

1. Department of Material Science and Engineering, Shiraz University of Technology, 3619995161 Shiraz (Iran, Islamic Republic of)
2. Department of Material Science and Engineering, Ferdowsi University of Mashhad, 9177948974 Mashhad (Iran, Islamic Republic of)

Highlights: • MA samples show higher dielectric permittivity and Curie temperature. • In MA samples, dielectric loss is almost 27% less than conventional ones. • In MA samples, sintering time and temperature are lower than conventional ones. • In MA samples, particle morphology is more homogeneous conventional ones. • In MA samples, crystallite size is smaller conventional ones. - Abstract: In present work, in order to study the effects of synthesis techniques on dielectric properties, the BNBT lead-free piezoceramics with (Bi{sub 0.5}Na{sub 0.5}){sub 0.94}Ba{sub 0.06}TiO{sub 3} stoichiometry (called as BNBT6) were synthesized by mechanical alloying (MA) and conventional mixed oxides methods. The structural, microstructural, and dielectric properties were carried out by X-ray diffractometer (XRD), scanning electron microscope (SEM), and impedance analyzer LCR meter, respectively. Based on results, the density of MA samples is considerably higher than conventional samples owning to smaller particles size and more uniformity of particle shape of MA samples. Moreover, the dielectric properties of MA samples are comparatively improved in which the dielectric loss of these samples is almost 27% less than conventional ones. Furthermore, MA samples exhibit obviously higher dielectric permittivity and Curie temperature compared to the conventional samples.

• OSTI ID: 22475853
• Journal Information: Materials Research Bulletin, Vol. 68; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM COMPOUNDS
BISMUTH COMPOUNDS
CERAMICS
CURIE POINT
DENSITY
DIELECTRIC MATERIALS
MICROSTRUCTURE
NANOSTRUCTURES
OXIDES
PARTICLE SIZE
PERMITTIVITY
PIEZOELECTRICITY
SCANNING ELECTRON MICROSCOPY
SINTERING
SODIUM COMPOUNDS
STOICHIOMETRY
SYNTHESIS
TITANATES
X-RAY DIFFRACTION
X-RAY DIFFRACTOMETERS