Bismuth sodium titanate (BNT) (Bi 0.5 Na 0.5 TiO 3) emerges as a prospective lead-free piezoelectric ceramic with improved characteristics, boasting a high residual polarization (P r) of 38 μC/cm 2 and coercive fields (E c) of 73 kV/cm [[7], [8], [9]]. The challenges associated with high coercive field, conductivity, and domain switching ...

Nayak, P., Badapanda, T., Pattanayak, R. et al. Structural, Electrical, and Optical Behavior of Strontium Bismuth Titanate Ceramic. Metall Mater Trans A 45, …

Therefore, the grains in BIT ceramics generally present anisotropic piezoelectric properties, yet the net macro polarization is zero because of randomly distributed polarization directions of ferroelectric domains in the ceramic. Download : Download high-res image (2MB) Download : Download full-size image; Fig. 1. …

Lead-free piezoelectric ceramics have been widely used for aerospace and power generating industrial and medical imaging applications in ultrasonic transducers and noninvasive therapy. Bismuth-layered structure ferroelectrics (BLSF) are the potential candidates for high-temperature piezoceramics. In the present work, the influence of …

In this paper, the variation of piezoelectricity of sodium bismuth titanate-barium titanate (NBBT) ceramics after high temperature reduction was researched. A kind of ceramic with piezoelectric and flexoelectric properties was obtained by reducing one surface of ceramics at a high temperature. The relationship between the reduction …

Bismuth-germanate glasses, which are well known as a promising active medium for broadband near-infrared spectral range fiber lasers and as an initial matrix for nonlinear optical glass ceramics, have been synthesized in a 5–50 mol% Bi2O3 wide concentration range. Their structural and physical characteristics were studied by Raman and FT-IR …

Abstract. Piezoelectric ceramics, as essential components of actuators and transducers, have captured significant attention in both industrial and scientific research. The "entropy …

Glasses and glass ceramic materials with the compositions (in moles) 2Bi2O3; 3SiO2 and 2Bi2O3; 3GeO2 were irradiated with γ-rays at doses 105 and 106 rad. The pre- and post-irradiation absorption spectra, microhardness and refractive indices of the glass and glass ceramic samples were studied. It was shown that gamma radiation …

Bismuth layered ceramic solid solution with high temperature piezoelectricity endurance and low sintering temperature - ScienceDirect. Sensors and Actuators A: …

The perovskite-structured BNT-based ceramics exhibit a strong ferroelectric response, since Bi 3+ has a lone pair of electrons (6s 2 ), which strongly hybridizes with the oxygen 2p orbital [19].

1. Introduction (Bi 0.5 Na 0.5)TiO 3 (BNT) was first reported by Smolenskii et al. in 1960 [].BNT ceramic is a kind of ABO3 type ferroelectrics which is replaced by Na + and Bi 3 + complex ions at A …

Fe doped sodium bismuth titanate ceramics were synthesized by solid state reaction. ... Download : Download high-res image (552KB) Download : Download full-size image; Fig. 1. (a) PXRD patterns of the unpoled and poled ceramics (b) Rietveld refinement fit of unpoled NBTFO1 (bottom panel) and NBTFO2 (top panel).

Dielectric studies were carried out on a lead free Sodium Bismuth Titanate, NBT, (Na0.5Bi0.5TiO3) composition. The material was synthesized by conventional ceramic method (CS) and microwave ...

The classical view of the structural changes that occur at the ferroelectric transition in perovskite-structured systems, such as BaTiO3, is that polarization occurs …

BiFeO3-BaTiO3 (BF-BT)-based lead-free ceramics are promising piezoelectric materials exhibiting high Curie temperatures and excellent electrochemical properties.

Bismuth sodium titanate (Bi 0.5 Na 0.5 TiO 3, BNT) based ferroelectric ceramic is one of the important lead free dielectric materials for high energy storage applications due to its large polarization.Herein, we reported a modified BNT based relaxor ferroelectric ceramics composited with relaxor Sr 0.7 Bi 0.2 TiO 3 (SBT) and ferroelectric …

Ferroelectric properties of Pb-modified strontium bismuth titanate ceramics with chemical formula Sr 1Àx Pb x Bi 4 Ti 4 O 15 (x = 0–0.4) were investigated. Polycrystalline ceramics were synthesized by soft chemical method to study the effect of …

Download full-text PDF. Read full-text. Download citation. ... Al4Bi2O9 on 99.9% Al2O3 and Bi12SiO20 On 96% Al2O3 Bismuth deeply penetrates in the ceramic interstices in all the cases. Until Bi2O3 ...

The classical view of the structural changes that occur at the ferroelectric transition in perovskite-structured systems, such as BaTiO3, is that polarization occurs due to the off-center displacement of the B-site cations. Here, we show that in the bismuth sodium titanate (BNT)-based composition 0.2(Ba0.4Sr0.6TiO3)–0.8(Bi0.5Na0.5TiO3), this model …

Finally, a bismuth borate ceramic/epoxy shielding composite was cut into 50 mm × 50 mm × 20 mm rectangular specimens to test the shielding and physical …

The results are discussed and compared to those of Bi 3.25 La 0.75 Ti 3 O 12 (BLT) ceramics to elucidate the effects of lanthanum ion addition on grain growth behavior of BIT ceramics. 2. Experimental procedure. Bi 4 Ti 3 O 12 and Bi 3.25 La 0.75 Ti 3 O 12 powders were prepared from binary oxides i.e. Bi 2 O 3 (>98.0%, Fluka), La 2 O 3 …

The dysprosium doped barium bismuth titanate ceramic with general formula BaBi 4−x Dy x Ti 4 O 15 (BBDT) were prepared by solid-state reaction process. The effect Dy 3+ on Bi 3+ sites on the structural, microstructure, dielectric, conductivity and ferroelectric behaviour of BaBi 4 Ti 4 O 15 ceramics were investigated. X-ray diffraction …

The present manuscript explores the impact of Dy doping in the Tantalum based bismuth layer structured ferroelectrics with chemical composition of Sr(Bi 1-x Dy x) 2 Ta 2 O 9 (where x = 0.00, 0.025, 0.05, 0.075 and 0.10) prepared by mixed oxide process. X-ray diffraction study of all the ceramics implement orthorhombic phase without any …

Sodium Bismuth Titanate-Based Ceramics. Tadashi Takenaka & Hajime Nagata. Chapter. First Online: 13 October 2011. 2378 Accesses. 5 Citations. Abstract.

In recent years the microwave sintering has been utilized for the synthesis of materials in enhancement of the properties. In this paper strontium bismuth niobate (Sr 0.8 Bi 2.2 Nb 2 O 9:SBN) bulk ceramic has been synthesized by microwave reactive sintering and conventional heating techniques.A relative density of 99.6% has been achieved for …

An electric-field-induced strain in ferroelectric materials has extensive applications in actuators and sensors. BiFeO3 (BFO) ceramic is a promising candidate for high-temperature electromechanical coupling applications due to its exceptionally high Curie temperature (Tc ∼ 825 °C). Here, we reported an enhan 2017 Journal of Materials …

A new type of lithium bismuth phosphate 3Li2O–Bi2O3–6P2O5 (3L1B6P) microwave dielectric ceramics were prepared via a conventional solid-state route. Crystal structure, microstructure, microwave dielectric properties and aluminum electrode co-firing compatibility of the 3L1B6P ceramics were investigated. The 3L1B6P ceramics mainly …

The real part of the dielectric permittivity of bulk ceramic ferroelectric of composition Bi 1−x Nd x FeO 3 (x = 0, 0.15, 0.2), synthesized by solid-state route, was characterized in the frequency range 0.1–3.5 THz using time-domain Tera-Hertz spectroscopy, and the effect of Nd 3+ concentration on the Terahertz (THz) properties of …

New design of bismuth borate ceramic/epoxy composites with excellent fracture toughness and radiation shielding capabilities - ScienceDirect. Abstract. …

Fig. 3 shows the SEM images of BSF15 and BSF18 ceramics as representative example, while the images of the other compositions are given in the Supporting information as Fig. S6. The Bi 25 FeO 40 phase is mainly present at the grain boundaries, while Bi 2 Fe 4 O 9 is evidenced within the grains, in agreement with …

Bismuth layer structured lead free piezoelectric ceramics in the system Sr1−x Ca x Na0.5Bi4.5Ti5O18 + 1 wt% CeO2 (SC x NBTC; x = 0, 0.25, 0.5, 0.75 and 1) have been prepared through the conventional solid-state reaction method. X-ray diffraction measurement indicates that a single phase layered perovskite was obtained for all …

Experimental. Bismuth sodium titanate (BNT) ceramics of the composition Bi 0.5+x Na 0.5-x TiO 3 with x = 0.005 and 0.010 were prepared by the conventional solid state route. Starting materials were bismuth oxide Bi 2 O 3 (Sigma Aldrich, purity 99.9 %), sodium hydrogen carbonate NaHCO 3 (Merck, purity ≥ 99.7 %) and titanium dioxide TiO …

Lithium borate-bismuth tungstate glass-ceramics is a good candidate to exhibit photocatalytic activity for dye degradation. ... Download : Download high-res image (172KB) Download : Download full-size image; Fig. 1. (a) XRD patterns, and (b) Raman spectra of AQ and Laser-crystallized glass-ceramic.

The impact of bismuth substitution at neodymium (Nd) site in aluminum-replaced Ba3.75Nd9.5Ti18O54 ceramics on dielectric constant (ε r), quality factor (Qf), and temperature coefficient of resonant frequency (τ f ) has been determined (0.05 ≤ x ≤ 0.2). With appropriate quality factor values (Qf > 5000 GHz), the dielectric constant increased …

Traces of Pbam were found in the ceramics using transmission electron microscopy in previous studies [18]. Download : Download high-res image (491KB) Download : Download full-size image; Fig. 1. a) Powder XRD pattern for Bi 0.88 Gd 0.12 FeO 3 with major peaks labelled according to the rhombohedral notation. Inset (left) …

The classical view of the structural changes that occur at the ferroelectric transition in perovskite-structured systems, such as BaTiO3, is that polarization occurs due to the off-center displacement of the B-site cations. Here, we show that in the bismuth sodium titanate (BNT)-based composition 0.2(Ba0.4Sr0.6TiO3)–0.8(Bi0.5Na0.5TiO3), …

Bismuth-based Piezoelectric Ceramics. Tadashi Takenaka. Chapter. 8486 Accesses. 4 Citations. Important ferroelectric or antiferroelectric oxide ceramics for dielectric, …

The network structure of bismuth-based glass ceramic was analyzed by attenuated total reflection infrared spectrum (ATR) and Raman spectrum. It can be observed in Fig. 2 that there are five absorption bands in the infrared absorption spectrum, namely 650-750 cm −1, 790-860 cm −1, 1050-1140 cm −1, 1200-1280 cm −1 and 1690-1760 cm −1.The …

Ca0.4Sr0.6Bi4Ti4O15 ceramics with a-axis preferred orientation were prepared by a solid-state reaction method. The cylindrical Ca(0.4)Sr(0.6)Bi(4)Ti(4)O(15)ceramics were cut into two types of ...

The purpose of this work is a qualitative analysis and evaluation of the interaction of the ceramic and composite materials with the flow of liquid lead–bismuth coolant (coolant flow rate up to 2 m/s, temperature up to 550°C), pumped with oxygen, and the selection of the most heat-resistant material from them for use as friction couples of ...