Ceramic materials Ba(1−x)SrxTiO3 for electronics — Synthesis and characterization

Berbecaru, C.; Alexandru, H.V.; Poroşnicu, C.; Velea, A.; Ioachim, A.; Nedelcu, L.; Toacsǎn, M.I.

doi:10.1016/j.tsf.2008.04.031

Cited by 37 publications

(31 citation statements)

References 11 publications

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“…The measured Archimedean density shows a decrease from 4,450 to 3,710 kg/m 3 as x is increased from 0.05 to 0.2, for samples sintered at 1250°C for 2 h (see Table 1 for other sintering times). This is in agreement, within experimental error, with the highest range of Sr content of the previously mentioned results [31,32]. The observed decrease in density of our samples is attributed to the increased porosity associated with increasing of Sr content [32], as well as, the fact that the atomic weight of Sr (87.62) is lower than that of Ba (137.3).…”

Section: Densitysupporting

confidence: 92%

“…Variations of bulk density of Ba (1-x) Sr (x) TiO 3 ceramics, where 0.25≤x≤0.9, have been investigated [31,32]. The reported results showed that the measured density (gm/cm 3 )…”

Section: Densitymentioning

confidence: 99%

“…Reported results [31,32] showed that density was increased for sintering temperatures in the range from 1200 to 1230°C, and maintained constant beyond 1230°C up to 1260°C. Also, an increase in density was observed [33] as sintering time was increased from 2 h to 4 h for soaked pellets sintered at the same temperature.…”

Section: Densitymentioning

confidence: 99%

“…Dependences of bulk density of BST ceramics on sintering temperature [31,32] and on sintering temperature and soaking time [33] were investigated. Reported results [31,32] showed that density was increased for sintering temperatures in the range from 1200 to 1230°C, and maintained constant beyond 1230°C up to 1260°C.…”

Section: Densitymentioning

confidence: 99%

“…Also, the grain size was increased with increasing of Ba content or, in other words, substitution of Ba by Sr inhibited growth of grains. Therefore, the ceramic microstructure, by this way, has its effect on ultrasonic velocity, elastic modulus, and attenuation of ultrasonic waves as follows: increasing of Sr content would increase porosity [32], and decreases the particle sizes [34,37] in the formed perovskite polycrystalline structures. This in turn decreases the attenuation of ultrasonic waves propagated in these ceramics, increases elastic modulus, and ultrasonic velocity [36], as obtained in Fig.…”

Section: Attenuation Elastic Modulus and Ultrasonic Velocitymentioning

confidence: 99%

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Structural and mechanical properties characterization of barium strontium titanate (BST) ceramics

et al. 2011

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Ba (1-x) Sr (x) TiO 3 ceramics, where x=0.05, 0.10, 0.15, and 0.20, were prepared by solid state reaction technique. X-ray diffraction analysis confirmed the formation of single phase perovskite structures. Mechanical properties such as ultrasonic attenuation, longitudinal wave velocity, and longitudinal elastic modulus were studied by an ultrasonic pulse echo technique at 2 MHz. Investigations of ceramic microstructures and mechanical properties showed its dependence on composition and sintering time. Increasing of Sr content, x, resulted in a decrease in bulk density and ultrasonic attenuation and an increase in velocity and modulus. Also, size of crystallites and c/a ratio were found to decrease with increasing of x, and increased with increasing of sintering time. High temperature ultrasonic studies showed, in addition to Curie phase transition, two relaxation peaks and its origin was investigated. The acquired structural and mechanical results were correlated and discussed.

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Section: Densitysupporting

confidence: 92%

“…Variations of bulk density of Ba (1-x) Sr (x) TiO 3 ceramics, where 0.25≤x≤0.9, have been investigated [31,32]. The reported results showed that the measured density (gm/cm 3 )…”

Section: Densitymentioning

confidence: 99%

Section: Densitymentioning

confidence: 99%

Section: Densitymentioning

confidence: 99%

Section: Attenuation Elastic Modulus and Ultrasonic Velocitymentioning

confidence: 99%

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Structural and mechanical properties characterization of barium strontium titanate (BST) ceramics

et al. 2011

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Abnormal Electromechanical Property of Nonlinearly Graded Lead‐Free Ferroelectric Thin Films

Lich

Bui

Shimada

et al. 2021

Advcd Theory and Sims

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A phase field model for nonlinearly graded ferroelectric thin films is developed based on the Ginzburg–Landau theory. The developed phase field model is validated by comparing simulated results and available experiment data. Via phase field simulations, effects of gradient index on polarization field and electromechanical response are systematically investigated. Anomalously large electromechanical responses are explored in nonlinearly graded ferroelectric thin films made of Ba1−x$_{1-x}$SrxTiO3, where SrTiO3 mole fraction varies across the film thickness according to power‐law relationships. In addition, a large gradient of polarization can be stabilized in graded ferroelectric thin films, where both magnitude and gradient of polarization can be manipulated by controlling the gradient index of thin films. The remarkable enhancement of electromechanical properties originates from the large gradient of polarization in thin films, which makes the polarization field more susceptible to external excitation. An optimal gradient index for maximizing the electromechanical response is also identified. Furthermore, a consideration of energy properties of graded thin films suggests that both energy storage density and charge–discharge efficiency increase with increasing gradient index of thin films.

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Barium strontium titanate-based perovskite materials from DFT perspective: assessing the structural, electronic, vibrational, dielectric and energetic properties

et al. 2021

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Ceramic materials Ba(1−x)SrxTiO3 for electronics — Synthesis and characterization

Cited by 37 publications

References 11 publications

Structural and mechanical properties characterization of barium strontium titanate (BST) ceramics

Structural and mechanical properties characterization of barium strontium titanate (BST) ceramics

Abnormal Electromechanical Property of Nonlinearly Graded Lead‐Free Ferroelectric Thin Films

Barium strontium titanate-based perovskite materials from DFT perspective: assessing the structural, electronic, vibrational, dielectric and energetic properties

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