نتایج جستجو برای: batio3

تعداد نتایج: 1820  

Journal: :Energy & environmental materials 2023

Compared to organic–inorganic hybrid perovskites, the cesium-based all-inorganic lead halide perovskite (CsPbI3) is a promising light absorber for solar cells owing its higher resistance thermal stress. Nonetheless, additional research required reduce nonradiative recombination realize full potential of CsPbI3. Here, diffusion Cs ions participating in ion exchange proposed be an important facto...

Journal: :Materials Science and Engineering: C 2021

Piezoelectric ceramics, such as BaTiO3, have gained considerable attention in bone tissue engineering applications thanks to their biocompatibility, ability sustain a charged surface well improve cells' adhesion and proliferation. However, the poor processability brittleness of these materials hinder fabrication three-dimensional scaffolds for load bearing applications. For first time, this stu...

پایان نامه :دانشگاه تربیت معلم - سبزوار - دانشکده علوم پایه 1390

در این پژوهش خواص الکترونیکی شامل: نوارهای انرژی، چگالی حالت های کلی و جزئی وچگالی ابر الکترونی، و همچنین خواص اپتیکی از جمله: تابع دی الکتریک ،ضریب شکست، طیف اتلاف انرژی الکترون، بازتابش اپتیکی و هدایت اپتیکی مورد بررسی قرار گرفت. ترکیبات مورد نظر سرامیک های فروالکتریک batio3 و bati0.91zr0.09o3 و سرامیک پاراالکتریک bazro3 می-باشد. محاسبات بر اساس نظریه تابعی چگالی (dft) با استفاده از امواج تخ...

Journal: :Coatings 2021

Beta-titanium alloys are promising materials for bone implants due to their advantageous mechanical properties. For enhancing the interaction of cells with this perspective material, we developed a ferroelectric barium titanate (BaTiO3) coating on Ti39Nb alloy by hydrothermal synthesis. This was analyzed scanning electron and Raman microscopy, X-ray diffraction, piezoresponse force photoelectro...

Journal: :Physica Status Solidi A-applications and Materials Science 2021

The Schottky barrier formation between polycrystalline acceptor-doped BaTiO3 and high work function RuO2 is studied using photoelectron spectroscopy. heights for electrons of ?1.4 eV are determined, independent doping level oxygen vacancy concentration the substrates. insensitivity height related to permittivity BaTiO3, which results in space-charge regions (SCRs) being considerably wider than ...

Journal: :Materials Letters 2022

Polyvinylidene fluoride (PVDF) exhibits favorable piezoelectric properties for energy storage applications. However, their application has been hindered owing to low dielectric constant. To overcome this, studies have reported the incorporation of BaTiO3 fillers induce a phase transition in PVDF phase, i.e., β phase. In this study, effect self-assembled filler aggregates on α–β BaTiO3/PVDF comp...

Journal: :Journal of the Ceramic Society of Japan 2022

In order to obtain material design guidelines for next-generation multilayer ceramic capacitors (MLCCs) from the viewpoint of polarization behavior, we investigated changes in behavior with AC- and Uni-poling treatment using (Ba,Ca)(Ti,Zr)O3-based MLCC samples which a part BaTiO3 core was modified Ca Zr. Comparisons DC-aging measurements confirmed that treated clearly showed unique phenomenon d...

2007
Young-Han Shin Jong-Yeog Son Byeong-Joo Lee Ilya Grinberg Andrew M Rappe

We report the displacive and order–disorder characters of PbTiO3 analyzed using a classical atomic model which was developed under the inverse relation between the bond length and the bond valence. The ferroelectric phase changes to the paraelectric phase around 700 K, and the histograms of Ti–O and Pb–O bond lengths have three peaks which become a single peak above the phase transition tempera...

Journal: :Processing and Application of Ceramics 2021

Monodispersed tetragonal barium titanate (BaTiO3) nanopowders were synthesized by a convenient hydrothermal route at low temperature of 200?C in only 24 h. The key point this method is to promote the generation ultrafine titanium hydroxide precipitation precursors with help absolute ethyl alcohol and ammonia solution during hydrolysis Ti(OC4H9)4. results X-ray diffraction Raman spectra show tha...

Journal: :Advanced materials 2016
Madeleine R Morris Stephanie R Pendlebury Jongin Hong Steve Dunn James R Durrant

Spontaneous polarization is shown to enhance the lifetimes of photogenerated species in BaTiO3 . This is attributed to polarization-induced surface band bending acting as a thermal barrier to electron/hole recombination. The study indicates that the efficiencies of solar cells and solar fuels devices can be enhanced by the use of ferroelectric materials.

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