Ferroelectric and piezoelectric properties of (1 − x) (Bi0.5Na0.5)TiO3–xBaTiO3 ceramics

Parija, B.; Badapanda, T.; Panigrahi, S.; Sinha, T. P.

doi:10.1007/s10854-012-0764-z

Cited by 49 publications

(35 citation statements)

References 60 publications

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“…Moreover, BNT-5BT and BNT-6BT also present anomalies associated with the rhombohedral-tetragonal structural phase transition [18]. The second region, around the temperature of maximum dielectric permittivity, T εm , which occurs around 262°C, 275°C and 223°C for BNT-5BT, BNT-6BT and BNT-7BT respectively, shows any appreciable relaxation, this process occurs in a wide temperature range being characterized by different authors as a diffuse phase transition between the antiferroelectric and the paraelectric phases [16,17]. Internal friction, Q -1 , and storage modulus, E', measured at different frequencies as a function of temperature, for the analyzed compositions (Figs.…”

Section: Resultsmentioning

confidence: 98%

“…The first region (between room temperature and 170°C), T ε1 , shows maxima around 114°C, 105°C and 96°C (at 10kHz) for BNT-5BT, BNT-6BT and BNT-7BT respectively. This observation indicate a relaxation process which can be related to ferroelectricantiferroelectric phase transition [16,17]. Moreover, BNT-5BT and BNT-6BT also present anomalies associated with the rhombohedral-tetragonal structural phase transition [18].…”

Section: Resultsmentioning

confidence: 99%

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Analysis of the Phase Transitions in BNT-BT Lead-Free Ceramics Around Morphotropic Phase Boundary by Mechanical and Dielectric Spectroscopies

Silva¹,

Diaz²,

Florêncio³

et al. 2016

Archives of Metallurgy and Materials

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In this work, the syntheses and characterization by mechanical and dielectric spectroscopies of (1-x) Bi0.5Na0.5TiO3-xBaTiO3 (BNT-100xBT), with x = 0.05, 0.06 and 0.07, lead-free piezoelectric ceramics is reported. Ceramic samples of BNT-BT have been prepared by mixed-oxide method and then conventionally sintered. X-ray diffraction patterns of sintered samples, indicated for BNT-7BT the presence of tetragonal (P4mm) complex perovskite structure, whereas for BNT-5BT and BNT-6BT the samples exhibit a mixture of tetragonal (P4mm) and rhombohedral (R3c) crystalline phases, which reveal the presence of a morphotropic phase boundary (MPB) in the BNT-BT system. Measurements of internal friction, Q-1, and the storage modulus, E’, as a function of temperature at various frequencies were carried out in a Dynamic Mechanical Analyzer (DMA), in the temperature range from 0ºC to 600ºC. Dielectric profiles are recorded in the frequency range from 1kHz to 100kHz and the temperature range from room temperature to 475ºC. Mechanical loss spectra obtained for investigated compositions of BNT-BT samples showed different frequency-independent anomalies. Two main anomalies for BNT-5BT and BNT-6BT, observed around 100ºC and 430ºC were associated with the ferroelectric-antiferroelectric and antiferroelectricparaelectric phase transitions, respectively. The results obtained from mechanical loss measurements were supported by dielectric relaxation spectra. For BNT-7BT, outside the MPB, four different frequency-independent processes were observed.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Analysis of the Phase Transitions in BNT-BT Lead-Free Ceramics Around Morphotropic Phase Boundary by Mechanical and Dielectric Spectroscopies

Silva¹,

Diaz²,

Florêncio³

et al. 2016

Archives of Metallurgy and Materials

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“…The values of maximum breakdown field, coercive field and remnant polarization are increased with increasing the content of BT in (Bi 0.5-Na 0.5 )TiO 3 -BaTiO 3 ceramics. The dielectric constant and diffusivity values become more significant at higher concentration of BT [45]. The dielectric constant of polyvinylidene fluoride (PVDF) doped BT increases significantly by reducing particle size This may be attributed to space charge polarization at interface between BT and PVDF.…”

Section: Brief Introduction To Ferroelectricsmentioning

confidence: 99%

Dielectric behavior of perovskite glass ceramics

Yadav

Gautam

2014

J Mater Sci: Mater Electron

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The recent developments of energy storage devices are concerned with larger energy storage ability, low loss and good temperature stability. It has a great technological importance in engineering science. The dielectric materials like ceramics and glass ceramics have great interest in electronic ceramic industry due to above concern. The ceramic dielectrics are used as a capacitive element in electronic circuits. The perovskite glass ceramics have very high dielectric constant and low dielectric loss. The high dielectric constant in glass ceramics is attributed to space charge polarization. In order to produce glass ceramics of high dielectric constant, barium titanate glass ceramics is the first discovered ferroelectric perovskite. In this review article, we are summarizing the dielectric behavior of perovskite glass ceramics such as

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“…This additional line is already considerably seen for the compositions which exhibit the tetragonal phase. It is evident that the arising of the additional line (≈ 310 cm −1 ) is connected with the appearance of tetragonal symmetry [22].…”

Section: Samplementioning

confidence: 92%

Dielectric and Raman Studies of 0.935(Bi_0.5Na_0.5TiO₃)-0.065BaTiO₃ Lead Free Ceramics

2016

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The 0.935(Na0.5Bi0.5)TiO3−0.065BaTiO3 lead free ceramic was synthesized by conventional solid state reaction technique. Sintering was done at 1200• C for 4 h in air atmosphere. Dielectric and Raman spectroscopic studies have been performed as a function of temperature from 25 to 450• C. The phase transitions from ferroelectric to antiferroelectric and from antiferroelectric to paraelectric order were observed through the dielectric measurements. Further support for the obtained results was drawn from the Raman spectroscopy measurements.

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Ferroelectric and piezoelectric properties of (1 − x) (Bi0.5Na0.5)TiO3–xBaTiO3 ceramics

Cited by 49 publications

References 60 publications

Analysis of the Phase Transitions in BNT-BT Lead-Free Ceramics Around Morphotropic Phase Boundary by Mechanical and Dielectric Spectroscopies

Analysis of the Phase Transitions in BNT-BT Lead-Free Ceramics Around Morphotropic Phase Boundary by Mechanical and Dielectric Spectroscopies

Dielectric behavior of perovskite glass ceramics

Dielectric and Raman Studies of 0.935(Bi_0.5Na_0.5TiO₃)-0.065BaTiO₃ Lead Free Ceramics

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Ferroelectric and piezoelectric properties of (1 − x) (Bi0.5Na0.5)TiO3–xBaTiO3 ceramics

Cited by 49 publications

References 60 publications

Analysis of the Phase Transitions in BNT-BT Lead-Free Ceramics Around Morphotropic Phase Boundary by Mechanical and Dielectric Spectroscopies

Analysis of the Phase Transitions in BNT-BT Lead-Free Ceramics Around Morphotropic Phase Boundary by Mechanical and Dielectric Spectroscopies

Dielectric behavior of perovskite glass ceramics

Dielectric and Raman Studies of 0.935(Bi0.5Na0.5TiO3)-0.065BaTiO3 Lead Free Ceramics

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Dielectric and Raman Studies of 0.935(Bi_0.5Na_0.5TiO₃)-0.065BaTiO₃ Lead Free Ceramics