نتایج جستجو برای: bismuth ferrite
تعداد نتایج: 13366 فیلتر نتایج به سال:
This paper reports for the first time the use of perovskite bismuth ferrite (BiFeO3 or BFO) on ZnO-based solid state solar cells using only chemical solution methods for materials synthesis. As ZnO has poor chemical stability in acidic and corrosive environments, a buffer method using aminosilane ((3-aminopropyltriethoxysilane or H2N(CH2)3Si(OC2H5)3)) coating was used to provide a protective co...
Piezoelectric materials, which convert mechanical to electrical energy and vice versa, are typically characterized by the intimate coexistence of two phases across a morphotropic phase boundary. Electrically switching one to the other yields large electromechanical coupling coefficients. Driven by global environmental concerns, there is currently a strong push to discover practical lead-free pi...
Stimulus-responsive shape-memory materials have attracted tremendous research interests recently, with much effort focused on improving their mechanical actuation. Driven by the needs of nanoelectromechanical devices, materials with large mechanical strain, particularly at nanoscale level, are therefore desired. Here we report on the discovery of a large shape-memory effect in bismuth ferrite a...
The present research reports fabrication of nanoand submicrometer-sized BiFeO3 (BFO) powders from bismuth nitrate and iron chloride by a simple hydrothermal method at 180°C for 16 h in the presence of various MOH mineralizers (M = K, Na and Li). The final products were characterized by X-ray powder diffraction (XRD) and high-resolution transmission electron microscope (HR-TEM). Alkaline mineral...
Ultrathin BiO x and FeO layers were obtained by Atomic Layer Deposition (ALD) on the surface of a flexible Kapton substrate (poly (4,4’-oxydiphenylene-pyromellitimide)) at temperature 250 °C. The layer thickness was 50 - 100 nm. Surface morphology, electrical polarization, mechanical properties investigated Force Microscope, Piezoelectric Microscopy Modulation Microscopy. Chemical analysis perf...
The aim of this work was to investigate the structure, optical and magnetic properties bismuth-doped cobalt ferrite nanoparticles (Co $$_{{1-x}}$$ BixFe2O4, x = 0, 0.05, 0.10) prepared by sol-gel technique. X-ray diffraction indicated that samples were cubic spinel with space group Fd3m. crystallite size, lattice parameter, unit cell volume decreased increasing bismuth ion content, which explai...
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