Transitions of barium strontium titanate ferroelectric ceramics for different strontium content

Ioachim, A.; Toacsǎn, M.I.; Banciu, M.G.; Nedelcu, L.; Dutu, A.; Antohe, S.; Berbecaru, C.; Georgescu, L.; Stoica, G.; Alexandru, H.V.

doi:10.1016/j.tsf.2006.11.097

Cited by 27 publications

(21 citation statements)

References 10 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%

“…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%

“…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%

“…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%

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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%

Section: Densitymentioning

confidence: 99%

“…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%

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

et al. 2011

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“…Figure 2 illustrates microstructure of (1 − x)NKN-xBST ceramics sintered at 1075°C for 2 h. It could be seen that the pure NKN ceramics were consisted of very large and dense grains compared with other specimens. However, as increasing of BST content, the grain size became small, due to the low sinterability of BST at relatively low sintering temperature of 1075°C [21,22]. Figure 3 exhibits the line shrinkage of (1 − x)NKNxBST ceramics sintered at 1075°C for 2 h.…”

Section: Methodsmentioning

confidence: 99%

Synthesis and piezoelectric properties of (1 − x)(Na0.5K0.5)NbO3–x(Ba0.95Sr0.05)TiO3 ceramics

Kim

Song²,

Choi³

et al. 2008

J Electroceram

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1 − x)(Na 0.5 K 0.5 )NbO 3 -x(Ba 0.95 Sr 0.05 )TiO 3 [(1 − x)NKN-xBST] ceramics were synthesized by the conventional solid-state sintering, and their microstructure and piezoelectric properties were investigated. The sintering temperature of the specimens was 1075°C in air atmosphere and a morphotropic phase boundary (MPB) was observed in the specimens with 0.03 ≤ x ≤ 0.05. Compared with the piezoelectric properties of the NKN ceramics, the enhanced d 33 value of 136 pC/N and ɛ 3 T

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Structural and dielectric properties of iron doped barium strontium titanate for storage applications

Saeed

Balachandran

Wong

et al. 2015

J Mater Sci: Mater Electron

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Barium strontium titanate (BST) and iron doped barium strontium titanate (BSTF) ceramics with general formula (Ba 0.5 Sr 0.5 Ti 1-y Fe y O 3 ) and different iron (Fe) contents were prepared by slow rate injection sol-gel technique. The phase analysis, morphology and dielectric properties of BSTFs were investigated. The phase analysis was carried out using XRD which revealed the crystallization of BSTF in perovskite structure with single phase. The Fe doped BST peaks shifted toward higher angles and the calculated crystallite size was 19 nm on average. The BSTF morphology was studied using TEM which showed that the particle size was affected by Fe content. The average particle size was found to be 37 nm for (Ba 0.5 Sr 0.5 Ti 1-y Fe y O 3 ) with Fe concentration of (y = 0.01, 0.05 and 0.1) calcined at (600, 800 and 1000°C). The dielectric measurements were carried out using impedance analyzer at room temperature as a function of frequency in the range of 10 Hz to 1 MHz. The dielectric constant and dielectric loss of the 1 mol% Fe-doped Ba 0.5 Sr 0.5 TiO 3 at 1 kHz were 1453.69 and 0.0063, respectively. The BSTF ceramics with high dielectric constant and low dielectric loss were obtained for the application DRAM cell capacitor.

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Transitions of barium strontium titanate ferroelectric ceramics for different strontium content

Cited by 27 publications

References 10 publications

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

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

Synthesis and piezoelectric properties of (1 − x)(Na0.5K0.5)NbO3–x(Ba0.95Sr0.05)TiO3 ceramics

Structural and dielectric properties of iron doped barium strontium titanate for storage applications

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