Ferroelectric and piezoelectric properties of bismuth titanate ceramic …
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 ...
Laser induced crystallization in lithium borate-bismuth …
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.
New design of bismuth borate ceramic/epoxy composites …
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 …
New Bismuth Sodium Titanate Based Ceramics …
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 …
Core–Shell Grain Structure and High Energy Storage
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 …
Processing and properties of translucent bismuth sodium titanate ceramics
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 …
New design of bismuth borate ceramic/epoxy composites …
The manufacturing process for the composite materials is illustrated in Fig. 1.Bismuth oxide and boric acid (molar ratio of Bi to B = 4:2.5–4) are mixed according to Table 1, heated in a muffle furnace to 500 °C for 3 h, and then finely ground to obtain ceramic powder. The ceramic powder was mixed with deionised water, WSM-R, and …
Structural, Electrical, and Optical Behavior of Strontium …
Nayak, P., Badapanda, T., Pattanayak, R. et al. Structural, Electrical, and Optical Behavior of Strontium Bismuth Titanate Ceramic. Metall Mater Trans A 45, …
On Corrosion Properties of Ceramic Materials for Pump
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 ...
Interactions between bismuth oxide and ceramic substrates …
PDF | We investigated the interactions between screen printed and fired layers of Bi2O3 and ceramic substrates of alumina and beryllia. It was found... | Find, read and …
Effect of gamma radiation on the properties of bismuth …
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 …
Investigation of Dielectric, Ferroelectric and Conduction …
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 …
(PDF) Enhanced energy storage properties in sodium bismuth …
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].
New design of bismuth borate ceramic/epoxy composites …
Download : Download high-res image (148KB ... we first prepared a bismuth borate ceramic skeleton using boric acid and bismuth oxide as the main raw materials and then successfully prepared a shielding composite with a three-dimensional interwoven structure using an epoxy resin containing dispersed Gd 2 O 3 powder vacuum-infiltrated …
Interactions between bismuth oxide and ceramic substrates …
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 ...
Sodium Bismuth Titanate-Based Ceramics | SpringerLink
Sodium Bismuth Titanate-Based Ceramics. Tadashi Takenaka & Hajime Nagata. Chapter. First Online: 13 October 2011. 2378 Accesses. 5 Citations. Abstract.
Influence of sintering temperature on the properties of high Tc bismuth
Sintering characteristics of bismuth layer structure Ca 0.82 (NaCe) 0.09 Bi 4 Ti 4 O 15 ceramics are shown in Fig. 3.The relative density, i.e. the ratio of the sample density to the theoretical X-ray density, is above 90% for samples fired at 1140–1190 °C.The optimum firing temperature is 1185 °C and the corresponding relative density is about …
Origin of Polarization in Bismuth Sodium Titanate-Based Ceramics …
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 | SpringerLink
Bismuth-based Piezoelectric Ceramics. Tadashi Takenaka. Chapter. 8486 Accesses. 4 Citations. Important ferroelectric or antiferroelectric oxide ceramics for dielectric, …
New design of bismuth borate ceramic/epoxy composites …
New design of bismuth borate ceramic/epoxy composites with excellent fracture toughness and radiation shielding capabilities - ScienceDirect. Abstract. …
Bismuth layer-structured piezoelectric ceramics with high
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 …
Origin of Polarization in Bismuth Sodium Titanate-Based Ceramics …
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 …
Physical properties and sinterability of pure and iron-doped bismuth …
Pure (BNT) and iron-doped bismuth sodium titanate (Fe-BNT) ceramics were produced according to the formula Bi 0.5 Na 0.5 Ti 1−x Fe x O 3−0.5x, where x = 0 to 0.1. The addition of Fe 2 O 3 enables decreasing the sintering temperature to 900 °C in comparison with 1075 °C for pure BNT, whilst also achieving lower porosities and greater …
Effect of Nd3+ substitution on structural, morphological, and
Bi1-xNdxFeO3 (x = 0, 0.1, 0.15, 0.20) bulk ceramics were successfully synthesized by solid-state method and influence of Nd3+ substitution on the electrical properties of polycrystalline BiFeO3 (BFO) was studied at lower electric fields (≤ 2 kV/cm) and reported for the first time. With progressive Nd3+ substitution a change in the …
Bismuth layered ceramic solid solution with high …
Bismuth layered ceramic solid solution with high temperature piezoelectricity endurance and low sintering temperature - ScienceDirect. Sensors and Actuators A: …
Investigation of BiFeO 3 -BaTiO 3 lead-free piezoelectric ceramics …
BiFeO3-BaTiO3 (BF-BT)-based lead-free ceramics are promising piezoelectric materials exhibiting high Curie temperatures and excellent electrochemical properties.
Synthesis and Characterization of Homovalent and …
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 …
Microstructure evolution and properties of dissimilar …
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 …
Nonstoichiometric Effects in the Leakage …
July 2017 Nonstoichiometric Effects in the Leakage Current and Electrical Properties of Bismuth Ferrite Ceramics 325 (1) Here, R is the resistance [Ω], A is the specimen cross-section
Effect of calcination temperature on structural, dielectric and
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 …
