Grain size dependence of the rayleigh coefficients in barium titanate ceramics

2000 ◽  
Vol 240 (1) ◽  
pp. 1317-1324 ◽  
Author(s):  
Liliana Mitoseriu ◽  
Vasile Tura ◽  
Dan Ricinschi ◽  
Catalin Harnagea
Keyword(s):  
Grain Size ◽  
Barium Titanate ◽  
Size Dependence ◽  
Titanate Ceramics

Grain Size Dependence of the Microstructure and Dielectric Properties of Potassium Niobate-Barium Titanate Ceramics

2013 ◽  
Vol 566 ◽  
pp. 34-37
Author(s):  
Kenta Yamashita ◽  
Ichiro Fujii ◽  
Kouichi Nakashima ◽  
Nobuhiro Kumada ◽  
Yoshihiro Kuroiwa ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Grain Size ◽  
Dielectric Properties ◽  
Barium Titanate ◽  
Size Dependence ◽  
Potassium Niobate ◽  
Titanate Ceramics

In this study, 0.8 KNbO3(KN) -0.2 BaTiO3(BT) ceramics were prepared using KN powder with the diameter of 100 nm and BT powders with the diameter of 100, 300, or 500 nm. The relative densities were more than 96 % of the theoretical densities of the samples. The dielectric constant of the samples was temperature-stable at temperatures between-50 and 300 °C and it was found that the dielectric constant of the 0.8KN-0.2BT ceramics increased as the BT diameter increased.

Grain-Size Effects on Diffuse Phase Transitions of Batio3 Ceramics Obtained by Alkoxide Precursors

1994 ◽  
Vol 346 ◽  
Author(s):  
R. P. S. M. Lobo ◽  
R. L. Moreira ◽  
N. D. S. Mohallem
Keyword(s):  
Grain Size ◽  
Phase Transitions ◽  
Barium Titanate ◽  
Size Effects ◽  
Sol Gel ◽  
Simple Relationship ◽  
Titanate Ceramics ◽  
Charged Defects ◽  
Alkoxide Precursors ◽  
Diffuse Phase

ABSTRACTBarium titanate ceramics have been obtained by sol-gel methods. The dielectric investigations of these materials revealed the existence of diffuse ferroelectric transitions. By using a phenomenological model, we could demonstrate the existence of a simple relationship between the diffuse character of the transition and the sample grain-size. This effect has been attributed to interactions between charged defects on the grain surfaces and the spontaneous polarization of the material.

Effects of phase composition and grain size on the piezoelectric properties of HfO2-doped barium titanate ceramics

2019 ◽  
Vol 54 (19) ◽  
pp. 12392-12400
Author(s):  
Hong-Mei Yin ◽  
Wen-Jun Xu ◽  
Heng-Wei Zhou ◽  
Xing-Yu Zhao ◽  
Yi-Neng Huang
Keyword(s):  
Grain Size ◽  
Phase Composition ◽  
Barium Titanate ◽  
Piezoelectric Properties ◽  
Doped Barium Titanate ◽  
Titanate Ceramics

Effect of Grain Size on Phase Transitions and Dielectric Properties of Nano-Crystalline Barium Titanate Ceramics

2012 ◽  
Vol 602-604 ◽  
pp. 192-196
Author(s):  
Li Ming Wang ◽  
Xiang Yun Deng ◽  
Hai Tao Zhang ◽  
Jian Bao Li ◽  
Di Chen ◽  
...  
Keyword(s):  
Phase Transition ◽  
Grain Size ◽  
Phase Transitions ◽  
Barium Titanate ◽  
Fine Grain ◽  
Nano Crystalline ◽  
Plasma Sintering ◽  
Transmission Electron ◽  
Spark Plasma ◽  
Titanate Ceramics

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.

scholarly journals Characterization of mechanical properties of barium titanate ceramics with different grain sizes

2018 ◽  
Vol 36 (1) ◽  
pp. 151-156 ◽  
Author(s):  
Tomasz Trzepiecinski ◽  
Magdalena Gromada
Keyword(s):  
Grain Size ◽  
Compressive Strength ◽  
Barium Titanate ◽  
Testing Machine ◽  
Compression Tests ◽  
Grain Sizes ◽  
Average Grain Size ◽  
Uniaxial Testing ◽  
Different Grain Size ◽  
Titanate Ceramics

AbstractIn this paper, three BaTiO3 powders of various particle size distributions were obtained as a result of mechanical activation in the mixer mill. Green barium titanate pellets and cylindrical specimens were fabricated by both uniaxial and isostatic pressing methods. As a result of the application of different maximal sintering temperatures, the obtained materials were characterized by various average grain sizes: 0.8 μm, 20 μm and 31.0 μm. The basic properties of sintered pellets and cylinders were determined and the influence of materials average grain size on their Young’s modulus and compressive strength were determined through compression tests in a uniaxial testing machine, Zwick/Roell Z100. The elastic properties were similar for tested materials with a different grain size. However, the microstructure of BaTiO3 strongly influenced the compressive strength.

A comparative study of the grain size effects on ferro-para phase transition in barium titanate ceramics

1999 ◽  
Vol 223 (1) ◽  
pp. 99-106 ◽  
Author(s):  
Liliana Mitoseriu ◽  
Vasile Tura ◽  
Constantin Papusoi ◽  
Toshio Osaka ◽  
Masanori Okuyama
Keyword(s):  
Phase Transition ◽  
Grain Size ◽  
Barium Titanate ◽  
Comparative Study ◽  
Size Effects ◽  
Para Phase ◽  
Titanate Ceramics ◽  
Grain Size Effects
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