New Bismuth Sodium Titanate Based Ceramics and Their
However, because of its strong ferroelectricity, BNT-based ceramics also exhibit great potential in the fields of energy storage, energy conversion and pyroelectric applications. In this chapter, new bismuth sodium titanate ceramics were synthesized and characterized, the ferroelectric properties, phase transition behaviors under external ...
Ultrahigh energy storage in high-entropy ceramic …
The BTO-based ceramic with S config = 1.25R exhibits domain sizes of 2.0 to 7.0 nm (Fig. 2C and fig. S4), and the domain sizes decrease to 0.8 to 3.6 nm with the …
Conduction mechanism in excess Bismuth doped Strontium Bismuth Niobate
It is interesting to note from Fig. 3 that the c-axis orientation is found to be minimum for SBN ceramic prepared with 5% excess bismuth whereas with further increase in excess bismuth content during processing (10%, 15% & 20%), SBN ceramics show a much stronger c-axis orientation.This may be explained on the basis of the …
Dielectric, impedance, and ferroelectric performances with …
The room-temperature XRD patterns of the BF-BT-xSBT ceramics are shown in Fig. 1 (a).All samples exhibit a typical perovskite phase structure with no trace of secondary impurity phases for x < 0.2, while the weak impure phase of Bi 25 FeO 39 can be gradually identified for x ≥ 0.2 [3, 17].Notably, the splitting of the (211) diffraction peak …
Effects of oxide additives on structure and properties of bismuth
Effects of oxide additives (Bi2O3, MnO2, La2O3, Sm2O3, SnO2, and Nb2O5) on structure and properties of 0.70Bi1.05FeO3–0.30BaTiO3 ceramics were investigated. Their microstructure and electrical properties were dependent on the types and contents of oxide additives. A large piezoelectric constant (d 33) of 135–200 pC/N …
Low-melting bismuth–borate glass: composition development
The properties of low-melting lead-free glass based on the system ZnO–Bi 2 O 3 –B 2 O 3 with K 2 O, Al 2 O 3, and SiO 2 additions are studied experimentally and the results are presented. The complete spreading and softening temperature ranges are determined. The computed values of the CLTE and refractive indices of the glasses are …
Piezoelectricity and flexoelectricity of sodium bismuth …
Although sodium bismuth titanate-based lead-free piezoelectric ceramics are a good substitute for lead oxide-based piezoelectric ceramics, their piezoelectric properties are still inferior to those of lead oxide-based ceramics. In this paper, the variation of piezoelectricity of sodium bismuth titanate-barium titanate (NBBT) ceramics after high …
Bismuth titanate based piezoceramics: Structural evolutions …
Here, a type of bismuth titanate based ceramics (Bi 3.96 Ce 0.04 Ti 2.97 W 0.015 Nb 0.015 O 12, abbreviated as BCTWN) was prepared by traditional solid-phase reaction technology, and the effects of sintering temperature on the multiple microstructures and electrical properties for BCTWN ceramics were investigated in details. The results …
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 …
Piezoelectric and Ferroelectric Properties of Bismuth Tungstate …
Single-phase bismuth tungstate (Bi 2 WO 6) ceramics with high relative density (>99%) were fabricated by spark plasma sintering.Ferroelectric, dielectric, and piezoelectric properties of Bi 2 WO 6 ceramics were investigated. Almost saturated polarization–electric field (P–E) hysteresis loops with a remanent polarization (P r) of …
Conduction mechanism in excess Bismuth doped Strontium Bismuth …
Strontium Bismuth Niobate ceramics with excess Bismuth doping (0%wt – 20%wt) were prepared using solid state reaction method. X-ray diffraction studies reveal the decrease in c-axis orientation as bismuth content increases up to 5 wt%, beyond that it increases. The dielectric studies were carried out at room temperature as well as at …
Phase evolution and electrical behaviour of samarium …
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 …
Structural evolution of thermal sprayed bismuth sodium titanate …
Journal of the American Ceramic Society (JACerS) is a leading ceramics journal publishing research across the field of ceramic and glass science and engineering. Abstract The structural evolution of lead-free piezoelectric bismuth sodium titanate (BNT) coatings with excess Bi derived from thermal spray process was investigated with …
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 …
Dielectric, ferroelectric, and energy storage
Ceramic capacitors based on linear or non-linear dielectric in their paraelectric phase can carry out this function due to their high stability and very low losses (< 0.1%). ... High energy storage density over a broad temperature range in sodium bismuth titanate-based lead-free ceramics. Sci. Rep., 7 (2017), p. 8726, …
Electrodeposition and analysis of thick bismuth films
Bismuth is a semimetal with interesting physical, electrical, and chemical properties 1,2.Its unique properties, low toxicity 3, and availability lead to many …
Enhanced piezoelectric performance in Na0.5Bi4.5Ti4O15‐based Bismuth
@article{Mo2022EnhancedPP, title={Enhanced piezoelectric performance in Na0.5Bi4.5Ti4O15‐based Bismuth‐layered ceramics by Nb/Mn doping modification}, author={Wengang Shenzhen Mo and Xin Luo and Yangyang Zhang and Huiyan Niu and Ziyan Fang and Liangwei Hu and Kun Liu and Qifan Li and Yong Chen and Meng Shen}, …
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), …
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 …
Room temperature magnetoelectric coupling in Fe-doped sodium bismuth
Multiferroic ceramics with switchable magnetization as well as high polarization at room temperature have remarkable technological impact. Herein, we report that a small concentration of Fe doping in the B-site of sodium bismuth titanate (NBT) lead to room temperature multiferroic nature with fascinating properties.
Sodium Bismuth Titanate-Based Ceramics
Dielectric, ferroelectric, and piezoelectric properties including phase transition temperatures of perovskite-type bismuth sodium titanate, (Bi 1/2 Na 1/2 )TiO 3 [BNT] …
Bismuth oxide based ceramics with improved …
For these type of applications the stabilized cubic bismuth oxides have significant advantages over the conventional stabilized zirconias, due to their ability to …
Bismuth-based Piezoelectric Ceramics
The electromechanical coupling factor, k33, of ordinarily fired (OF) BNTV-y0.75 ceramic was 0.21, which is one of the highest k33 values for bismuth layer …
Bismuth oxide based ceramics with improved …
Bismuth oxide based ceramics with improved electrical and mechanical properties: Part II. Structural and mechanical properties - ScienceDirect. Abstract. …
Piezoelectric properties of bismuth sodium titanate ceramics
The Bi-excess bismuth sodium titanate ceramics, BNT+Bi 2 O 3 x wt% [BNT-x], and hot-pressed (HP) BNT ceramics were prepared and investigated as aiming to estimate true piezoelectric properties of the BNT ceramic. An electromechanical coupling factor, k 33, and piezoelectric constant, d 33, of the BNT-0.3 ceramic sintered at 1225 °C for 30 min …
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 …
Bismuth titanate based piezoceramics: Structural …
Bismuth titanate piezoceramics are considered as the most promising candidate for high temperature applications, and its multi-functional properties such as …
U-shaped micropores induced dielectric and piezoelectric
Bi0.5Na0.5TiO3 (abbreviated as BNT)-based ceramics are considered the promising candidates for lead-free piezoelectric materials to replace the widely used lead zirconate titanate (PZT)-based piezoelectric ceramics. Piezoelectric properties could be modulated by porous structures to meet the needs of piezoelectric energy converters. …
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 ...
Sodium Bismuth Titanate-Based Ceramics | SpringerLink
The excess Bi 2 O 3-add bismuth sodium titanate, BNT, ceramics (BNT + Bi 2 O 3 x wt.% [BNT-x]) including no excess Bi 2 O 3 (BNT-0) (x = 0–2.0) were sintered at 1,225°C for 5 min to 10 h to compensate for the insufficiency of Bi ions. The measured density ratio to the theoretical density as a function of the sintering temperature on the …