Dependence of the direct piezoelectric effect in coarse and fine grain barium titanate ceramics on dynamic and static pressure

Barium titanate (BaTiO3) ceramics with grain size varied from 1000 to 8 nm were prepared by two step sintering method (TSS) and spark plasma sintering (SPS), respectively. Mixture structures of BaTiO3 ceramics were proved by in-situ temperature high resolution x-ray diffraction. Multiple ferroelectric domains present in nano-crystalline BaTiO3 ceramics were observed by transmission electron microscope. The evolution of phase transitions supported the existence of intrinsic mechanism. Dielectric loss of fine grain size BaTiO3 was higher than coarse grain size during Curie phase transition due to diffuse phase transition and grain boundary effects.

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EFFECT OF Co3O4 NANOPARTICLE ON THE PROPERTY OF BARIUM TITANATE CERAMIC

Journal of Advanced Dielectrics ◽

10.1142/s2010135x11000215 ◽

2011 ◽

Vol 01 (02) ◽

pp. 229-235 ◽

Cited By ~ 3

Author(s):

W. C. VITTAYAKORN ◽

D. BUNJONG ◽

A. RUANGPHANIT ◽

N. VITTAYAKORN

Keyword(s):

Barium Titanate ◽

Dielectric Behavior ◽

Cubic Phase ◽

X Ray Diffraction ◽

Cell Parameters ◽

Fine Grain ◽

Barium Titanate Ceramic ◽

Lower Temperature ◽

Titanate Ceramics ◽

Titanate Ceramic

Effects of the Co3O4 nanoparticle on the phase formation, microstructure and dielectric properties of barium titanate ceramics are investigated in this study. Co3O4 -doped BaTiO3 ceramics were prepared by the conventional mixed oxide method followed by normal sintering in air. Systematic studies of X-ray diffraction (XRD), scanning electron microscopy and dielectric spectroscopy with varying doping levels were performed. The cell parameters, tetragonality and crystallite size of doped ceramics also were calculated from XRD data. Results showed that the single phase of BaTiO3 gave no evidence of unwanted peak forms in any of the samples. Cubic phase occurred after adding Co3O4 at 0.25 mol%. Various grain sizes and shapes were found in this system. Finally, adding Co3O4 in BaTiO3 ceramics resulted in shifting of the Curie point to a lower temperature. The composition, x = 0.25, showed different dielectric behavior, which related to appearance of the cubic phase and fine grain microstructure.

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Contribution of the irreversible displacement of domain walls to the piezoelectric effect in barium titanate and lead zirconate titanate ceramics

Journal of Physics Condensed Matter ◽

10.1088/0953-8984/9/23/018 ◽

1997 ◽

Vol 9 (23) ◽

pp. 4943-4953 ◽

Cited By ~ 190

Author(s):

Dragan Damjanovic ◽

Marlyse Demartin

Keyword(s):

Barium Titanate ◽

Lead Zirconate Titanate ◽

Domain Walls ◽

Piezoelectric Effect ◽

Lead Zirconate ◽

Zirconate Titanate ◽

Titanate Ceramics ◽

Irreversible Displacement

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DC AND AC ELECTRICAL PROPERTIES OF PTC BARIUM TITANATE CERAMICS

Le Journal de Physique Colloques ◽

10.1051/jphyscol:19901152 ◽

1990 ◽

Vol 51 (C1) ◽

pp. C1-979-C1-984

Author(s):

S. HISHITA ◽

J. F. BAUMARD ◽

P. ABELARD

Keyword(s):

Electrical Properties ◽

Barium Titanate ◽

Ac Electrical Properties ◽

Titanate Ceramics

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Piezoelectric Energy Harvesting Solutions: A Review

Sensors ◽

10.3390/s20123512 ◽

2020 ◽

Vol 20 (12) ◽

pp. 3512 ◽

Cited By ~ 12

Author(s):

Corina Covaci ◽

Aurel Gontean

Keyword(s):

Energy Harvesting ◽

Piezoelectric Effect ◽

Piezoelectric Transducers ◽

Piezoelectric Energy Harvesting ◽

Piezoelectric Energy ◽

Direct Piezoelectric Effect ◽

Harvesting Technique ◽

Different Shapes ◽

Piezoelectric Devices ◽

Review Current

The goal of this paper is to review current methods of energy harvesting, while focusing on piezoelectric energy harvesting. The piezoelectric energy harvesting technique is based on the materials’ property of generating an electric field when a mechanical force is applied. This phenomenon is known as the direct piezoelectric effect. Piezoelectric transducers can be of different shapes and materials, making them suitable for a multitude of applications. To optimize the use of piezoelectric devices in applications, a model is needed to observe the behavior in the time and frequency domain. In addition to different aspects of piezoelectric modeling, this paper also presents several circuits used to maximize the energy harvested.

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