bismuth ceramic hp

Pure and niobium doped bismuth titanate ceramics Bi4Ti3−xNbxO12(Nb−BiT) with x ranging from 0% to 2% are prepared by sol–gel method. Pellets are sintered by pressureless sintering (PLS) and ...

The current study investigates the NTC characteristics of a Bi 2 O 3 based ceramic doped with WO 3, TiO 2 and Ta 2 O 5 over a temperature range of 100 to …

Electrical and conductivity performances of secondary phase in 0–3 type bismuth ferrate–based composite ceramics. Wenshuo Kang, Wenshuo Kang. Shanghai Institute of Ceramics, Key laboratory of Inorganic Functional Materials and Devices, Chinese Academy of Sciences, Shanghai, People's Republic of China ...

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 …

The DC Electrical Resistivity Curves of Bismuth-2212 Ceramic Superconductors: Evaluation of the Hole-Carrier Concentrations per-Cu Ion April 2016 Journal of Aceh Physics Society 5(1):9-13

Piezoelectric Properties of Bismuth Sodium Titanate Ceramics - Nagata - 2006 - Ceramic Transactions Series - Wiley Online Library.

Fig. 3 shows hysteresis loops of the BNdT ceramic capacitors measured under different applied voltages. The capacitors exhibit well-saturated polarization–electric field (P – E) switching curves.The remanent polarization (2 P r) of the capacitor is about 43 μC/cm 2 at an applied electric field of 180 kV/cm.This value is much larger than that of …

Posted December 9, 2015. Bismuth NitrateMolecular formula Bi(NO3)3.5H2OMolecular weight 485.07Bismuth SubnitrateMolecular formula Bi5O(OH)9(NO3)4Molecular weight 1461.99. Ok, so if I understand this right then molecular weight is a unit that can be anything you want it to be. First the Subnitrate has 5 Bi compared to the Nitrate so I think you ...

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 ...

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 …

Glass ceramics in the 20MO.55Bi 2 O 3.25B 2 O 3 (M = Sr, Ba) system were prepared by conventional melt quenching method, followed by heat treatment. XRD patterns show that the crystalline phase boron sillenite (Bi 24 B 2 O 39) was formed on thermal treatment.The variation in the microstructure of the sample as a function of …

Fig. 1 presents the XRPD patterns of unmodified and cerium-modified BTN ceramic pulverized powders with different cerium contents. The JCPDS card (No. 73-2180) was used in the analysis of the phases within the samples. The diffraction peaks were well indexed according to the standard powder diffraction data, which revealed only a …

Abstract. 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 …

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 …

We included all randomized trials using bismuth-containing quadruple regimens for treatment of H. pylori infection in China from 2006 to 2013. The experience consisted of 16 studies with 25 arms involving 1,971 patients. The definition of a successful regimen was based on the treatment success per protocol using the grading system ≥95% ...

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 …

In this chapter, new bismuth sodium titanate ceramics were synthesized and characterized, the ferroelectric properties, phase transition behaviors under external fields and related applications, such as …

Strontium Bismuth Niobate ceramics with excess Bismuth doping (0%wt – 20%wt) were prepared using solid state reaction method. ... KSGBN2 and KSGBN3 were obtained at some set frequencies in the ...

2. Bismuth Titanate (BiTi)—Material Properties. Bismuth titanate (BiTi) was discovered in 1949 by Bengt Aurivillius [].It is a bismuth layered ferroelectric oxide that belongs to the Aurivillius family—structures that are described by the formula (Bi 2 O 2)2+ (M n − 1R n O 3 n + 1)2−, where n is 1 to 6. The (M n − 1R n O 3 n + 1)2− formula is the …

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 …

BST246 ceramic was successfully synthesized by a solid-state reaction. High-resolution neutron diffraction and TEM analysis revealed two distinct phases, cubic …

A recent trend in the study on piezoelectric and/or pyroelectric ceramic compounds is the use of lead-free materials. The other trend is the use of grain orientation techniques as the ceramic fabrication methods. Recently, bismuth layer-structured ferroelectrics (BLSF), which form one of BO6 octahedral ferroelectric groups, have been ...

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 Bismuth-based lead-free incipient piezoceramics have potential in piezoactuators owing to their large strain response. However, a substantial strain hysteresis and poor ...

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 …

Bismuth titanate-based ceramics, pure and doped with 5 mol% WO 3, were prepared by reaction-sintering using a microwave oven.High densities, ≥96% of theoretical density were achieved with very short thermal treatments, with soaking time ranging from 5 to 15 min. Relatively small platelet-like grains were formed, and microstructure seemed …

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. …

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

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 …

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 Bi-excess bismuth sodium titanate, (Bi 1/2 Na 1/2)TiO 3 [BNT] + Bi 2 O 3 x wt.% [BNT-x] and hot-pressed BNT [HP-BNT] ceramics were prepared and their …

Particle Orientation During Tape Casting in the Fabrication of Grain-Oriented Bismuth Titanate. Hidenori Watanabe, Hidenori Watanabe. Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223, Japan. ... The slurry with a large powder content is favorable for preparing dense grain-oriented ceramics. References

Important ferroelectric or antiferroelectric oxide ceramics for dielectric, ferroelectric, piezoelectric, electrostrictive, and/or pyroelectric applications are restricted to perovskite …

Textured Nb-doped bismuth titanate ceramics (Bi 4 Ti 3−x/5 - Nb x/5 O 12, where x= 0.02) were fabricated by templated grain growth. It was found that the use of a fine precursor powder led to enhanced densification of the ceramic, while Nb doping reduced electrical conduction and dielectric loss, which enabled poling at high temperatures and …

Lead-free bismuth sodium titanate piezoceramics were processed by a solid-state route with a novel precursor approach. By carefully controlling the processing …

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 sintering … Expand

In this chapter, new bismuth sodium titanate ceramics were synthesized and characterized, the ferroelectric properties, phase transition behaviors under external fields and related applications, such as application in energy storage, energy conversion and pyroelectric detection were proposed. BNT-based piezoelectric ceramics.

The ceramics of bismuth sodium titanate was prepared by traditional technology [5] ... (HP) method. The resistivities of BKT ceramics hot-pressed at 1060 and 1080°C (hereafter abbreviated as BKT ...

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 …

High‐performance bismuth titanate‐ferrite (Bi5Ti3FeO15) for high‐temperature piezoelectric applications - Wang - Journal of the American Ceramic …