Designing lead-free bismuth ferrite-based ceramics learning …
Bismuth ferrite (BiFeO3, BFO) possesses very large spontaneous polarization, which provides a great potential in dielectric energy-storage capacitors. However, the presence of large remanent polarization heavily restricts the achievement of excellent performance in the energy storage field. Herein we designed local …
New lithium bismuth phosphate ceramic: crystal …
New lithium bismuth phosphate ceramic: crystal structure, microstructure, microwave dielectric properties and co-firing compatibility with aluminum electrode. …
Large strain of lead-free bismuth ferrite ternary ceramics at elevated
Here we observed a large strain of lead-free BiFeO 3 ternary ceramics by the composition design [(0.70-x)Bi 1.05 FeO 3-0.30BaTiO 3-xBi(Mg 2/3 Nb 1/3)O 3].Positive temperature dependence of strain under E = 4 kV/mm can be observed in the ceramics with x = 0.07.Large strain property (S = 0.32% and d 33 * = 800 pm/V) and low …
Multiferroic bismuth ferrite-based materials for …
Among the different types of multiferroic compounds, bismuth ferrite (BiFeO3; BFO) stands out because it is perhaps the only one being simultaneously …
Properties and Structure of Bismuth-Borate Glasses (Review)
The intensification of research on bismuth-containing borate systems has stimulated the development of an entire series of new glass compositions distinguished by high fusibility, special electric properties, high region of transmission, and nonlinear-optical properties. ... such as thermal and mechanical sensors, glass ceramics, reflecting ...
Grain growth behavior in bismuth titanate-based ceramics
Bismuth titanate and lanthanum-doped bismuth titanate ceramics were prepared from freeze-dried powders employing conventional solid state reaction and sintering procedures. The sintering process was carried out at 1150 °C from 4 up to 48 h. X-ray diffraction analysis showed that preferred orientation was reduced in bismuth …
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 …
In-depth understanding of {110}-type domain walls in bismuth …
In summary, the layered perovskite structure of BIT ceramics was directly observed at atomic-scale. The domain structures were then investigated by TEM and HRTEM, revealing the existence of in-plane {110}-type Ps (a) -90° DWs in BIT ceramics from the nano- and atomic-scale views, respectively.
Optimization of polarization and electric field of bismuth …
In this work, novel bismuth ferrite-based lead-free ceramics of (1-x)(0.67BiFeO 3-0.33BaTiO 3)-xNa 0.73 Bi 0.09 NbO 3 ((1-x)BFBT-xNBN) were designed and fabricated successfully by optimizing the polarization and electric field. With increasing the content of NBN, the remnant polarization decreased rapidly as well as the slim and …
New lithium bismuth phosphate ceramic: crystal structure
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 …
Particle transport mode during flash sintering of sodium bismuth …
However, the effect of liquid phase on particle transport has not been explained definitely. Moreover, flash sintering has a prominent contribution in the preparation ceramics with highly volatile species, such as KNbO 3 [ 24 ], NaNbO 3 [ 25] and BiFeO 3 [ 26 ]. Sodium bismuth titanate (Na 0.5 Bi 0.5 )TiO 3 (NBT) is the best-known electronic ...
The DC Electrical Resistivity Curves of Bismuth-2212 Ceramic
In this study the samples of Bismuth ceramic superconductors were synthesized by the melt textured growth methods from a 2212 stoichiometric composition in order to obtain a large amount of pure ...
Effect of grain size on domain structures, dielectric and …
The microscopic origin of the grain size effects on the dielectric, piezoelectric, and thermal depoling properties of Aurivillius phase Bi 3.15 Nd 0.85 Ti 3 O 12 was investigated. Using atomic force microscopy, domain walls were observed in micrometer grain size ceramics, but gradually disappeared with reducing grain size and were not …
Glaze Recipe: Alison Thyra Grubb : Ceramic Review
Lustre glazes can be quite unpredictable so I take notes during every firing to learn from my mistakes and recreate successful results. BASE GLAZE RECIPE. Calcium borate frit 60g. Nepheline …
Journal of the American Ceramic Society
Journal of the American Ceramic Society (JACerS) is a ... The bismuth layer-structured ferroelectric (BLSF) bismuth titanate-ferrite (Bi 5 Ti 3 FeO 15, BTF) has recently attracted considerable attention because of its high Curie temperature (T C) of ∼761°C. However, the piezoelectric properties of BTF-based compounds have not been ...
Silflex Shielding | American Ceramic Technology | United …
American Ceramic Technology, manufacturer of Silflex Shielding, the flexible silicone, nonhazardous, non-lead radiation shielding for the nuclear industry. Neutron and gamma shielding options including magnetic, stainless steel, …
Bismuth doped Sr2Fe1.5Mo0.5O6-δ double perovskite as a …
Bismuth doped Sr 2 Fe 1.5 Mo 0.5 O 6-δ double perovskite as a robust fuel electrode in ceramic oxide cells for direct CO 2 electrolysis. Author links open overlay panel Meiting Yang a 1, Zhen Yao b 1, Shuai Liu a, Jun Wang a, Anwei Sun c, Haoran Xu c, Guangming Yang a, Ran Ran a, Wei Zhou a, Gang Xiao c, Zongping Shao a d.
Microwave-assisted sintering of non-stoichiometric strontium bismuth …
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 …
Synthesis and characterization of strontium and barium bismuth …
The scanning electron micrographs of the glass ceramic samples obtained by thermal treatment of the glasses at different temperatures are presented in Fig. 3, Fig. 4.It can be observed that the surface microstructures of BBB500 and SBB500 (Figs. 3 a & 4 a) contain crystalline aggregates comprising numerous randomly oriented fine …
Room temperature magnetoelectric coupling in Fe-doped sodium bismuth
Fe doped sodium bismuth titanate ceramics were synthesized by solid state reaction. • Improved ferroelectric and ferromagnetic nature was obtained. • A reinforced self-biased magnetoelectric coupling of 7.38 mV/cmOe was observed. • Electric field induced non-180° domain alignment led to enhanced multiferroic behavior.
Bismuth layer-structured piezoelectric ceramics with …
Bismuth layer structured ferroelectrics (BLSFs) ceramics can be used to manufacture piezoelectric devices under high temperature due to their high Curie temperature [1–3]. So the BLSFs have been given more attentions in recent years [4–11]. Many studies concerning improving the Curie temperature of BLSFs ceramics for high temperature
U-shaped micropores induced dielectric and piezoelectric
Due to their good mechanical properties and stable piezoelectric properties, piezoelectric ceramics are multifunctional materials with a broad range of applications in multiple technological fields such as sensors, ultrasonic transducers, micro displacement devices, and other electronic components [1,2,3].PZT-based ferroelectric materials are …
Bismuth layered ceramic solid solution with high …
New codoped composite bismuth layered compound (CaBi)1-x(LiMn)xBi6NbTi5O24 ceramics were obtained in a wide sintering temperature range. • The highest d33 was achieved at a low sintering temperature of 960 oC despite the moderate density.. The piezoelectricity (d33) was increased about 2 or 3 times of that of the end …
Preparation and study of La-doped bismuth sodium
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 ...
Superior piezoelectric performance with high operating …
The MPB composition with rhombohedral-tetragonal phase coexistence demonstrates enhanced electromechanical properties, including T C of 380 °C, d 33 * of 395 pm V –1, d 33 of 302 pC N –1, and k p of 50%, which is comparable to that of commercial PZT-5A ceramics.. The in-situ d 33 reached 577 pC N –1 at 209 °C and 530 …
Bismuth Ferrite-Based Lead-Free High-Entropy …
The concept of high-entropy lead-free piezoelectric ceramics in this study provides a promising strategy for the exploration and development of the next generation of lead …
Origin of Polarization in Bismuth Sodium Titanate …
Origin of Polarization in Bismuth Sodium Titanate-Based Ceramics. Hangfeng Zhang., Marcin Krynski., A. Dominic Fortes., Theo Graves Saunders., …
Piezoelectric and structural properties of bismuth sodium
The development of piezoelectric ceramics with high energy conversion efficiency is of decisive importance for the requirements of the advanced energy harvesting devices toward miniaturization and integration. Lead titanate-zirconate (PZT) piezoceramics are the most widely used energy harvesting (EH) materials due to their excellent …
Sodium Bismuth Titanate-Based Ceramics | Semantic Scholar
Dielectric, ferroelectric, and piezoelectric properties including phase transition temperatures of perovskite-type bismuth sodium titanate, (Bi1/2Na1/2)TiO3 [BNT]-based lead-free piezoelectric ceramics have been reviewed from the results obtained by our group being superior candidates for lead-free piezoelectric materials to reduce environmental …