قائمة الطعام
Bismuth sodium titanate (Bi0.5Na0.5TiO3, 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 Sr0.7Bi0.2TiO3 (SBT) and ferroelectric …
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 …
Ceramics of bismuth titanate family Bi4Ti3O12 were prepared by the classic sintering process. A composition with a W6+ ion substitution and an addition of a small amount of Cr2O3 was perfected.
In the first synthetic method, high energy ball milling of bismuth metal with either MgO or SiO2 was found to produce nanostructured bismuth dispersed on a ceramic material.
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 …
Calcium bismuth niobate CaBi2Nb2O9 (CBN) ceramic is a promising candidate for high-temperature piezoelectric applications due to its high Curie temperature. However, the extremely low piezoelectric properties hinder its application. A combination method with element doping and texturing was used to improve the electric properties of …
Important ferroelectric or antiferroelectric oxide ceramics for dielectric, ferroelectric, piezoelectric, electrostrictive, and/or pyroelectric applications are restricted to perovskite …
Bismuth is a semimetal with interesting physical, electrical, and chemical properties 1, 2. Its unique properties, low toxicity 3, and availability lead to many …
The aim of this study is to determine the effect of the addition of bismuth (III) oxide on the properties of low-melting boron frits applied for the production of ceramic …
In the present study, formation of single-phase Strontium Bismuth Niobate (SBN) composition is investigated and the phase evolution is understood by studying the reaction mechanism between the raw materials and their combinations. The ceramics compositions were prepared using conventional solid-state reaction method. TG/DTA …
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 …
An open-circuit voltage of 6.9 V was received on oriented ceramic bismuth ferrite (BFO) thin-film solar cells working in an "out-of-plane" mode. The above-band-gap voltage is strongly related to the crystallinity, orientation, and thickness of the BFO film contributing to the bulk photovoltaic effects, which have been further verified by powder X …
Bismuth subnitrate supplies Bi2O3. A bismuth compound used in overglaze lusters. Soluble in acids but not in plain water [Parmelee]. May contain arsenic, lead, and silver as impurities. Linda Arbuckle's Ceramic Materials Guide: Can give mother‐of‐pearl luster in reduction. Low‐melting flux that replaces lead in more contemporary China paints.
For the synthesis of both ceramics powders were milled individually in a planetary mill with polyethelene containers and yittrium stabilized zirconia (YSZ) milling balls with ethanol and ammonium polyacrylate surfactant, until the mean particle size < 1 μm. ... Samarium substituted bismuth ferrite (BiFeO 3) ceramics prepared by sol-gel ...
2.3.2.Bi 2 X 3 (X = O, S). For Bi 2 O 3, Singh et al. calculated that the direct band gap of α-Bi 2 O 3 is 2.29 eV and lies between the (Y-H) and (Y-H) zone (Fig. 3 e) [73].Furthermore, they followed up with a study on the total DOS and partial DOS of α-Bi 2 O 3 (Fig. 3 f), showing that the valence band maximum (VBM) below the Fermi level is …
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 …
Lead-free bismuth sodium titanate piezoceramics were processed by a solid-state route with a novel precursor approach. By carefully controlling the processing …
The ceramics of bismuth sodium titanate was prepared by traditional technology [5] and was used as the target. The starting components of Bi 2 O 3, TiO 2, Na 2 СO 3 were weighed in ...
The Mn + 1AXn phases (M = early transition metal; A = group A element and X = C and N) are materials exhibiting many important metallic and ceramic properties. In the present study powder ...
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The average grain and domain sizes are noticeably different between the SSR and MAS ceramics, as extracted from PFM images using the autocorrelation function approach [36].The grains of the SSR ceramics are slightly larger (1.2–6 μm) as compared to those of MAS ceramics (0.3–3 μm; see Table 1).The average domain size of the SSR …
Pure (BNT) and iron-doped bismuth sodium titanate (Fe-BNT) ceramics were produced according to the formula Bi0.5Na0.5Ti1−xFexO3−0.5x, where x = 0 to 0.1. The addition of Fe2O3 enables decreasing the sintering temperature to 900 °C in comparison with 1075 °C for pure BNT, whilst also achieving lower porosities and greater …
The bismuth layered perovskite can be obtained with a significant decrease in temperature (of about 500 °C) and reaction time (several days), as compared with the conventional ceramic synthesis ...
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 ...
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 …
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 In this work, …
Lithium borate-bismuth tungstate glass-ceramics is a good candidate to exhibit photocatalytic activity for dye degradation. However, their photocatalytic activity will be strongly dependent on their crystal structure and morphology, which can be controlled by the laser-induced crystallization technique [17], [18], [19]. ... Ball mill-induced ...
PDF | Nanosized bismuth titanate, Bi4Ti3O12, was prepared via a high-energy ball milling process through mechanically assisted synthesis directly from... | …
Developed for high temperature applications, our modified bismuth titanate has an unusually high Curie temperature coupled with extremely stable piezoelectric activity over the entire temperature range. Frequently used in ultra high temperature accelerometers, pressure, knock, flow and NDT transducers. K-15.
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 …
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