Structural and electrical properties of La-modified BiFeO3–BaTiO3 composites

Behera, C.; Choudhary, R. N. P.; Das, Piyush R.

doi:10.1007/s10854-014-1844-z

Cited by 40 publications

(9 citation statements)

References 28 publications

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“…The slightly increased tanδ in x = 0.07 ceramic may be caused by the extra Bi 3+ volatilizaiton from BNT. Additionally, an anomaly is observed in tanδ for all BF‐BT‐ x BNT ceramics, which is ascribed to the distribution of thermally activated charge carriers . Thus, the decreased thermally activated charge carriers derived from reduced

V \ddot{normalo}

are responsible for the reduced anomaly intensity.…”

Section: Resultsmentioning

confidence: 89%

Enhanced insulating and piezoelectric properties of BiFeO₃‐BaTiO₃‐Bi_0.5Na_0.5TiO₃ ceramics with high Curie temperature

et al. 2019

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BiFeO3‐BaTiO3 ceramics are promising lead‐free piezoelectric ceramics due to their high piezoelectric properties and high Curie temperature, but their high leakage current density makes the poling difficult. In this study, a decreased leakage current density by three orders of magnitude was obtained in Bi0.5Na0.5TiO3 (BNT) added 0.67BiFeO3‐0.33BaTiO3 (BF‐BT) ceramics. It was found that the largely improved insulating properties benefit from the reduced oxygen vacancies and weak reduction of Fe3+ to Fe2+ as confirmed by photoluminescence and X‐ray photoelectron spectroscopy measurements, thereby contributing to high‐temperature and high‐field poling. In addition, the introduction of BNT leaded to increased grain size. Due to the grown grains as well as reduced oxygen vacancies and Fe2+, enhanced insulating and optimal piezoelectric properties with Pr = 24.2 µC/cm2, d33 = 183 pC/N, kp = 0.28, and TC = 467°C were achieved in BF‐BT‐0.05BNT ceramics.

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V \ddot{normalo}

are responsible for the reduced anomaly intensity.…”

Section: Resultsmentioning

confidence: 89%

Enhanced insulating and piezoelectric properties of BiFeO₃‐BaTiO₃‐Bi_0.5Na_0.5TiO₃ ceramics with high Curie temperature

et al. 2019

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“…11 Dependence of a dielectric constant, e r and b dissipation factor, tand with temperature at different frequencies for the glass ceramic sample 8PL5B726S [187] Fig. 12 Dependence of a dielectric constant, e r and b dissipation factor, tand with temperature at different frequencies for the glass ceramic sample 6PL7B796S [190] J Mater Sci: Mater Electron (2014) 25:5165-5187 5181 ceramic [189][190][191]. Ce-modified lead zirconate titanate ceramics have dielectric constant more than 700 [192].…”

Section: Lead Strontium Titanate Glass Ceramicsmentioning

confidence: 99%

“…The ac conductivity follows trend of Jonscher's universal power law. The conductivity of BT increases with increasing theconcentration of La 2 O 3 [12]. Komatsu et al [13] has reported the superconducting nature in Bi 2 Sr 2 CaCu 2 O x glass ceramics and it is controlled by grain orientation at thesurface.…”

mentioning

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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“…20 These two peaks are due to three different types of ferroelectric compounds present in the system. 21 These two peaks are due to different phase transitions of BiFeO 3 and BaTiO 3 and the dielectric peak is shifted towards the low-temperature side on the increasing frequency. It is due to the occurrence of electromagnetic effect in the Bi 0:8 Tb 0:1 Ba 0:1 Fe 0:9 Ti 0:1 O 3 material.…”

Section: Introductionmentioning

confidence: 98%

“…These type of two peaks has been observed in samples due to the high percentage of dopant ion (>5%). [20][21][22][23][24] With the increase in temperature, the dielectric constant rises up to 170 C and then decreases up to 235 C. After 235 C, dielectric constant increases again up to 320 C. The two maximum values of dielectric constant (" 1 max : and " 2 max : ) with two transition temperatures at different frequencies (1-100 kHz) are shown in Table 1. Figure 3 shows the variation of log ac (s=m) versus 1/T (K À1 ) of BTBFT ceramics at 1-100 kHz frequencies in the temperature range from 325 C to 345 C. The ac electrical conductivity was obtained from the impedance data using the formula ¼ !""…”

Section: Introductionmentioning

confidence: 99%

Dielectric, electrical conduction and magnetic properties of multiferroic Bi0.8Tb0.1Ba0.1Fe0.9Ti0.1O₃ perovskite compound

2017

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This work focuses on the structural, electrical and magnetic properties of Bi 0:8 Tb 0:1 Ba 0:1 Fe 0:9 Ti 0:1 O 3 ceramics, fabricated by solid state reaction procedure. XRD forms of the samples at RT exhibited perovskite phase through the hexagonal structure at room temperature. Dielectric studies of the materials with frequency at different temperatures (25-400 C) exhibit two dielectric anomalies, first at 175 C (ferroelectric-ferroelectric transition) and second at around 320 C (ferroelectric-paraelectric transition). The Curie temperature moved towards the low side temperature with the increase in frequency. The less value of activation energy got for these samples could be attributed to the influence of electronic contribution to the conductivity. A significant change in the magnetic studies was observed for Bi 0:8 Tb 0:1 Ba 0:1 Fe 0:9 Ti 0:1 O 3 ceramic. The impedance analysis confirms the non-Debye type nature of the ceramic and relaxation frequency moved to a higher temperature. The Nyquist plot and conductivity studies showed the NTCR behavior of samples. The highest magnetization field was found at temperature À268.15 C.

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Structural and electrical properties of La-modified BiFeO3–BaTiO3 composites

Cited by 40 publications

References 28 publications

Enhanced insulating and piezoelectric properties of BiFeO₃‐BaTiO₃‐Bi_0.5Na_0.5TiO₃ ceramics with high Curie temperature

Enhanced insulating and piezoelectric properties of BiFeO₃‐BaTiO₃‐Bi_0.5Na_0.5TiO₃ ceramics with high Curie temperature

Dielectric behavior of perovskite glass ceramics

Dielectric, electrical conduction and magnetic properties of multiferroic Bi0.8Tb0.1Ba0.1Fe0.9Ti0.1O₃ perovskite compound

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Structural and electrical properties of La-modified BiFeO3–BaTiO3 composites

Cited by 40 publications

References 28 publications

Enhanced insulating and piezoelectric properties of BiFeO3‐BaTiO3‐Bi0.5Na0.5TiO3 ceramics with high Curie temperature

Enhanced insulating and piezoelectric properties of BiFeO3‐BaTiO3‐Bi0.5Na0.5TiO3 ceramics with high Curie temperature

Dielectric behavior of perovskite glass ceramics

Dielectric, electrical conduction and magnetic properties of multiferroic Bi0.8Tb0.1Ba0.1Fe0.9Ti0.1O3 perovskite compound

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Enhanced insulating and piezoelectric properties of BiFeO₃‐BaTiO₃‐Bi_0.5Na_0.5TiO₃ ceramics with high Curie temperature

Enhanced insulating and piezoelectric properties of BiFeO₃‐BaTiO₃‐Bi_0.5Na_0.5TiO₃ ceramics with high Curie temperature

Dielectric, electrical conduction and magnetic properties of multiferroic Bi0.8Tb0.1Ba0.1Fe0.9Ti0.1O₃ perovskite compound