Dielectric studies and AC conductivity of piezoelectric barium titanate ceramic polymer composites

In this work, ceramics barium titanate (BT) polymer composites were prepared with BT/polyvinyl alcohol (PVA) having a ceramic concentration of 10, 30, and 50% by weight using solution casting method. The prepared thin film samples were characterized by X-ray diffraction for phase analysis. Scanning electron microscope (SEM) studies on composite films revealed ceramic crystallites are well dispersed in the polymer matrix. The dielectric constant ( εr) and the AC conductivity at room temperature and at different frequencies (100 Hz–5 MHz) of the piezoelectric composites with different concentrations were investigated. The result shows that the dielectric constant of ceramic-PVA composites was found to increase as ceramic concentration increases and the dielectric loss tangent decreased with increasing concentration. AC conductivity of the composites increased with increasing frequency.

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Barium Titanate Ceramic/Ceramic 0–3 Composites for Ultrasonic Transducer Applications

MRS Proceedings ◽

10.1557/proc-574-347 ◽

1999 ◽

Vol 574 ◽

Author(s):

M. C. Cheung ◽

H. L. W. Chan ◽

Q. F. Zhou ◽

C. L. Choy

Keyword(s):

Barium Titanate ◽

Ceramic Composite ◽

Ultrasonic Transducer ◽

Ferroelectric Properties ◽

Sol Gel ◽

X Ray Diffraction ◽

X Ray ◽

Barium Titanate Ceramic ◽

Sol Gel Process ◽

Titanate Ceramic

AbstractBarium titanate (BaTiO3) 0–3 ceramic/ceramic composite thick films (∼16μm) for ultrasonic transducer applications were fabricated by a modified sol-gel process. Nano-sized BaTiO3 powder was dispersed in a sol-gel matrix of BaTiO3 to form a 0–3 composite solution. Films were prepared by spin coating and then annealed at various temperatures. The crystallization of the composite film was studied by X-ray diffraction. The dielectric permittivity and the ferroelectric properties of the film were also measured.

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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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Microstructure and dielectric properties of dysprosium-doped barium titanate ceramics

Cerâmica ◽

10.1590/s0366-69132005000300007 ◽

2005 ◽

Vol 51 (319) ◽

pp. 214-218 ◽

Cited By ~ 26

Author(s):

Y. Pu ◽

W. Chen ◽

S. Chen ◽

Hans T. Langhammer

Keyword(s):

Dielectric Constant ◽

Dielectric Properties ◽

Barium Titanate ◽

Field Strength ◽

Electric Field ◽

Electric Field Strength ◽

Vacancy Concentration ◽

Breakdown Electric Field ◽

Barium Titanate Ceramic ◽

Titanate Ceramic

The substitution behavior and lattice parameter of barium titanate between solid_solubility with a dopant concentration in the range of 0.25 to 1.5 mol% are studied. The influences of dysprosium-doped fraction on the grain size and dielectric properties of barium titanate ceramic, including dielectric constant and breakdown electric field strength, are investigated via scanning electronic microscopy, X-ray diffraction and electric property tester. The results show that, at a dysprosium concentration of 0.75 mol%, the abnormal grain growth is inhibited and the lattice parameters of grain rise up to the maximum because of the lowest vacancy concentration. In addition, the finegrain and high density of barium titanate ceramic result in its excellent dielectric properties. The relative dielectric constant (25 °C) reaches to 4100. The temperature coefficient of the capacitance varies from -10 to 10% within the temperature range of -15 °C -100 °C, and the breakdown electric field strength (alternating current) achieves 3.2 kV/mm. These data suggest that our barium titanate could be used in the manufacture of high voltage ceramic capacitors.

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Local Structure Analysis of Lead Zinc Niobate-Barium Titanate Ceramic by X-Ray Absorption Spectroscopy and Density Functional Calculation

Chinese Physics Letters ◽

10.1088/0256-307x/34/8/086102 ◽

2017 ◽

Vol 34 (8) ◽

pp. 086102

Author(s):

Kanokwan Kanchiang ◽

Phakkhananan Pakawanit ◽

Rattikorn Yimnirun

Keyword(s):

Barium Titanate ◽

Local Structure ◽

Density Functional ◽

Density Functional Calculation ◽

X Ray ◽

Barium Titanate Ceramic ◽

Lead Zinc Niobate ◽

Lead Zinc ◽

X Ray Absorption ◽

Titanate Ceramic

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Pyroelectric Effect in Barium Titanate Ceramic

Journal of Applied Physics ◽

10.1063/1.1657195 ◽

1969 ◽

Vol 40 (11) ◽

pp. 4335-4340 ◽

Cited By ~ 35

Author(s):

Sidney B. Lang ◽

Lynn H. Rice ◽

Steven A. Shaw

Keyword(s):

Barium Titanate ◽

Pyroelectric Effect ◽

Barium Titanate Ceramic ◽

Titanate Ceramic

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Effect of Bi and Sm ion doping in barium titanate ceramic: dielectric, optical and ferroelectric study

Applied Physics A ◽

10.1007/s00339-021-04990-z ◽

2021 ◽

Vol 127 (11) ◽

Author(s):

Minakshi Padhy ◽

R. N. P. Choudhary ◽

P. Ganga Raju Achary

Keyword(s):

Barium Titanate ◽

Ceramic Dielectric ◽

Barium Titanate Ceramic ◽

Ion Doping ◽

Titanate Ceramic

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Effect of simultaneous substitution of La and Mn on dielectric behavior of barium titanate ceramic

Journal of Materials Science ◽

10.1007/s10853-006-0985-8 ◽

2007 ◽

Vol 42 (14) ◽

pp. 5490-5496 ◽

Cited By ~ 25

Author(s):

Om Parkash ◽

Devendra Kumar ◽

R. K. Dwivedi ◽

K. K. Srivastava ◽

Prakash Singh ◽

...

Keyword(s):

Barium Titanate ◽

Dielectric Behavior ◽

Barium Titanate Ceramic ◽

Simultaneous Substitution ◽

Titanate Ceramic

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Crystallization and Dielectric Properties of MWCNT /Poly(1-Butene) Composite Films by a Solution Casting Method

Materials ◽

10.3390/ma13030755 ◽

2020 ◽

Vol 13 (3) ◽

pp. 755

Author(s):

Lingfei Li ◽

Qiu Sun ◽

Xiangqun Chen ◽

Yongjun Xu ◽

Zhaohua Jiang

Keyword(s):

Dielectric Constant ◽

Dielectric Properties ◽

Dielectric Loss ◽

Breakdown Strength ◽

Composite Films ◽

Conductive Filler ◽

Interfacial Polarization ◽

Solution Casting ◽

Casting Method ◽

Solution Casting Method

In this work, poly(1-butene) (PB-1) composite films with multi-walled carbon nanotubes (MWCNT) were prepared by a solution casting method. The relationship between the dielectric properties and the crystal transformation process of the films was investigated. It was indicated that there were two crystal forms of I and II of PB-1 during the solution crystallization process. With the prolongation of the phase transition time, form II was converted into form I. The addition of the conductive filler (MWCNT) accelerated the rate of phase transformation and changed the nucleation mode of PB-1. The presence of crystal form I in the system increased the breakdown strength and the dielectric constant of the films and reduced the dielectric loss, with better stability. In addition, the dielectric constant and the dielectric loss of the MWCNT/PB-1 composite films increased with the addition of MWCNT, due to the interfacial polarization between MWCNT and PB-1 matrix. When the mass fraction of the MWCNT was 1.0%, the composite film had a dielectric constant of 43.9 at 25 °C and 103 Hz, which was 20 times that of the original film.

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