Influence of Na, Sm substitution on dielectric properties of SBT ceramics

Ravikiran, U.; Sarah, P.; Anand, Gagan; Zacharias, Elizabeth

doi:10.1016/j.ceramint.2019.06.172

Cited by 11 publications

(3 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The dielectric loss tangent (tan δ ) values at room temperature for the frequencies 10 kHz, 100 kHz, and 1 MHz are 0.031, 0.065, and 0.084, respectively. The dielectric tangent loss values are low at a temperature <500 • C. When the temperature exceeds the Curie temperature, the dielectric loss sharply increases because of the increment in the thermally conductive current, which can be attributed to the creation of oxygen vacancies (16) . The lower values of tan δ will be beneficial for designing the high signal-to-noise ratio pyroelectric device.…”

Section: Resultsmentioning

confidence: 99%

Structural, Dielectric Properties and Conduction Mechanism of SrBi4Ti4O15 Ceramics

Lakshmipathi¹,

Kumar²,

Sreelekha³

et al. 2022

IJST

View full text Add to dashboard Cite

Objectives: 1. To prepare SrBi 4 Ti 4 O 15 ceramics via solid-state reaction method. 2. To make a systematic investigations on structural and dielectric properties of SBT ceramics. Methods: The structural information of Strontium Bismuth Titanate (SBT) ceramics is examined by X-ray diffraction and Raman spectroscopy techniques. The surface morphology and elemental analysis of SBT ceramic is employed by scanning electron microscope attached with energydispersive X-ray spectroscopy. The dielectric measurements of SBT ceramics were performed using the impedance analyzer HIOKI-3532 LCR meter. Findings: From the X-ray diffraction studies, SBT exhibits a strongest diffraction peak (1 1 9) with the lattice parameters a = 5.428 Å, b = 5.423 Å, and c = 42.146 Å. The diffraction patterns were indexed to the orthorhombic phase. The surface morphology of the samples shows plate-like morphology with a grain size of ~1µm. The temperature-dependent ac conductivity confirms the thermally activated conduction mechanism. The ac conductivity of SBT ceramic was increased from 2.25 × 10 -5 to 7.16 × 10 -4 Ω.m -1 with an increase of frequency from 10 kHz to 1 MHz. The high curie temperature at ~540 • C, and low dielectric loss of ~0.031 for SBT ceramics can be appropriate for high-temperature electronic applications. Novelty: SBT ceramic exhibits enhanced electrical conductivity value (7.16 × 10 -4 Ω.m -1 )and makes it suitable for electronic device applications.

show abstract

Section: Resultsmentioning

confidence: 99%

Structural, Dielectric Properties and Conduction Mechanism of SrBi4Ti4O15 Ceramics

Lakshmipathi¹,

Kumar²,

Sreelekha³

et al. 2022

IJST

View full text Add to dashboard Cite

show abstract

“…Research on the pure BLSFs or modified BLSFs is mainly focused on achieving high piezoelectric behavior for high-temperature piezoelectric applications and also maintaining low dielectric loss, high resistivity, and good ferroelectric properties. It is observed that the properties of the BLSFs are strongly dependent on the number of perovskite units (A m-1 B m O 3m+1 ) 2− , which can be controlled to great extent by doping the suitable dopant at A or B -sites [ 13 , 14 ]. Strontium bismuth titanate, or SrBi 4 Ti 4 O 15 (SBT), with m = 4 ceramics is the widely studied material among the BLSFs family; it possesses the orthorhombic symmetry with A 21 am space group at room temperature, which transforms to tetragonal ( I 4 /mmm ) above transition temperature T C [ 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

“…It is observed that the properties of the BLSFs are strongly dependent on the number of perovskite units (A m-1 B m O 3m+1 ) 2− , which can be controlled to great extent by doping the suitable dopant at A or B -sites [ 13 , 14 ]. Strontium bismuth titanate, or SrBi 4 Ti 4 O 15 (SBT), with m = 4 ceramics is the widely studied material among the BLSFs family; it possesses the orthorhombic symmetry with A 21 am space group at room temperature, which transforms to tetragonal ( I 4 /mmm ) above transition temperature T C [ 14 , 15 , 16 ]. The suitable A and B -site dopants for SBT have recently shown interesting behaviors regarding the piezoelectric, ferroelectric, and pyroelectric properties.…”

Section: Introductionmentioning

confidence: 99%

Boosting of Magnetic, Ferroelectric, Energy Storage Efficiency, and Piezoelectric Properties of Zn Intercalated SrBi4Ti4O15-Based Ceramics

et al. 2022

View full text Add to dashboard Cite

An appropriate amount of Zn-ions are incorporated into the high Curie temperature bismuth layer-structure ferroelectric material to fabricate Sr0.2Na0.4Pr0.4Bi4Ti4O15:xwt%ZnO; (SNPBT:xZn), with x = 0, 0.10, 0.15, and 0.20 ceramic series to investigate the magnetic, ferroelectric, and energy storage efficiency and piezoelectric properties. Pure SNPBT and SNPBT:xZn ceramics have maintained their structure even after the intercalation of Zn-ions at the lattice sites of SNPBT. The addition of ZnO in SNPBT has improved the multifunctional properties of the material at x = 0.15. At room temperature, SNPBT:0.15Zn has shown a high relative density of 96%, exhibited weak ferromagnetic behavior along with a low saturation magnetization (Ms) of 0.028 emu/g with a low coercive field of 306 Oe, a high remnant polarization (Pr) of 9.04 µC/cm2, a recoverable energy density (Wrec) of ~0.5 J/cm3, an energy conversion efficiency (η) of ~41%, a high piezoelectric co-efficient (d33) of 21 pC/N, and an impedance of 1.98 × 107 Ω, which are much improved as compared to pure SBT or pure SNPBT ceramics. Dielectric Constant (ɛr) versus temperature plots present the sharp peak for SNPBT:0.15Zn ceramic at a Curie temperature (TC) ~ 605 °C, confirming the strong ferroelectric nature of the ceramic. Moreover, SNPBT:0.15Zn ceramic has shown strong, piezoelectric, thermally stable behavior, which remains at 76% (16 pC/N) of its initial value even after annealing at 500 °C. The achieved results clearly indicate that SNPBT:0.15Zn ceramic is a promising candidate for future wide-temperature pulse power applications and high-temperature piezoelectric devices.

show abstract

Piezoelectric Materials for Sustainable Energy and Fitness Monitoring of Civil Structures

Anand

2022

Lecture Notes in Civil Engineering

View full text Add to dashboard Cite

Influence of Na, Sm substitution on dielectric properties of SBT ceramics

Cited by 11 publications

References 16 publications

Structural, Dielectric Properties and Conduction Mechanism of SrBi4Ti4O15 Ceramics

Structural, Dielectric Properties and Conduction Mechanism of SrBi4Ti4O15 Ceramics

Boosting of Magnetic, Ferroelectric, Energy Storage Efficiency, and Piezoelectric Properties of Zn Intercalated SrBi4Ti4O15-Based Ceramics

Piezoelectric Materials for Sustainable Energy and Fitness Monitoring of Civil Structures

Contact Info

Product

Resources

About