Бидний тухай
Бүтээгдэхүүн
Холбоо барихХязгааргүй брэндийн үнэ цэнэ
Sofol-ийн хийж байгаа зүйл бол хэрэглэгчдэд хэмнэлттэй, тохиромжтой үйлдвэрлэлийн шугамыг тохируулах, брэндийн үнэ цэнийг бий болгох явдал юм.
Нүүр хуудас
021-58386189
Цэс
Sofol-ийн хийж байгаа зүйл бол хэрэглэгчдэд хэмнэлттэй, тохиромжтой үйлдвэрлэлийн шугамыг тохируулах, брэндийн үнэ цэнийг бий болгох явдал юм.
In this work, we report the synthesis and investigations of Ba1−xFexTiO3 (BFeT) and BaTi1−x FexO3 (BTFe) ceramics by solid state reaction method. BFeT show relaxor behaviour in the studied frequency range i.e., 10 kHz to 100 kHz with high dielectric constant in a wide temperature range of 75 °C. BTFe shows frequency dispersion at 10 …
Fe doped samples exhibit ferroelectric transition with transition temperature (T cF) in the range of 390 K for x=0.0–312 K for x=0.2. The dielectric constant, ε′ is found to …
The XRD patterns of undoped, La-doped, Nb-doped and La–Nb-co-doped BaTiO 3 samples show that the tetragonal BaTiO 3 phase (space group P4mm) has been prepared throughout with no impurity phases detected after La and Nb doping. 44 The shift in the 101/110 reflection positions indicates that the La and Nb doping changes the lattice …
Fe-doped BaTiO3 is a promising multiferroics material due to its appealing physical properties and potential applications in sensors, transducers and non-volatile memories and multilayer ...
Fe-doped BaTiO3 thin films were grown on (001) oriented SrTiO3 substrates using pulsed-laser deposition technique. These films had a single-phase character and good epitaxial relationship with the ...
The iron distribution in iron-doped BaTiO3 ceramic with an average grain diameter of 0.3 μm is measured in a scanning transmission electron microscope with a field-emission gun.
Abstract. Electrical properties of acceptor (Mn, Mg or Mn+Mg)-doped BaTiO3 ceramic have been studied in terms of oxygen vacancy concentration, various doping levels and electrical degradation ...
Additionally, the composite of BaSO4 and BaTiO3 was doped with copper, iron, sulfur, and nitrogen. By doping BaTiO3, acid red 151 and acid blue 113 achieved 86.7% and 89.2% efficiency ...
In these first-principles calculations, the plane-wave energy cutoff was set as 500 eV.The Brillouin-zone (BZ) was sampled by 7 × 7 × 7 (pure BaTiO3) and 3 × 3 × 3 (doped BaTiO3) Monkhorst-Pack [23] k meshes. The relaxation of the electronic degrees of freedom will be stopped if the total energy change and the band structure energy change …
T. K. Kundu. Cobalt (Co) ion-doped barium titanate (BaTiO3, BT) nanoparticles were synthesized through the sol–gel route using polyvinyl alcohol. The concentration of Co2+ varies from 0 to 1.6 ...
The structural, magneto-optical, optical, and magnetic properties of BaTi1−xFexO3 films grown by pulsed laser deposition onto MgO (100) have been investigated for Fe content, x=0.15, 0.2, 0.3, and 0.5. Saturation Faraday rotation varies from 0.033deg∕μm for x=0.2 to 0.109deg∕μm for x=0.5 at a 1.55-μm wavelength, with …
The doping of magnetic element Fe brings about ferromagnetic order for the samples, and the measured magnetic moment for each Fe atom increases from 0.70 μ B to 1.55 μ B in BFTO samples. The origin of ferromagnetism of the BFTO samples should be attributed to the double exchange interactions of Fe 3+ – O 2 – Fe 4+ ions.
Fe-doped BaTiO 3 ceramics produced from powders prepared by solid state reaction at various processing parameters (temperature, time) were investigated and …
See more on link.springer
WebFe 3+ incorporation into the structure of BaTiO 3 promotes the stabilization of a non-ferroelectric hexagonal phase instead of a tetragonal one. •. The processing …
The higher values of this parameter are known in the Fe doped BaTiO3 ceramics [28] and they are due to Fe 3+ and oxygen ion vacancies and/or other defects. BTFWO compound shows lower values (0.1-0 ...
While x = 0.00 (only Fe-doped) stabilizes in the undesirable paraelectric-hexagonal phase, x = 0.02 (Bi-Fe codoped) is engineered to possess a low band gap (∼1.55 eV), high FE polarization (∼5 ...
For Ce-doped BaTiO3, it was evident that the substitution of Ce for the Ba site slightly decreased the band gap from 2.081 eV to 2.023 eV, whereas the band gap was significantly decreased from 2. ...
The dielectric study at 100 Hz and 400 °C(max.) indicate the decrement in dielectric constant to 12.76 × 10 3 in Fe +3 doped ceramic and 10.68 × 10 3 in the case of Zr +4 doped ceramic concerning that of 13.02 × 10 3 in pristine ceramic. M−H loop study exhibited ferromagnetic characteristics in doped and pristine ceramics.
Doped BTO is widely studied because of its ferroelectricity and transition to semiconducting behavior upon suitable doping. Here, we report on the effect of Fe …
Abstract. Barium titanate, BaTiO3, has been the first commercial ferroelectric and piezoelectric material. After more than 70 years from its discovery, it is still the most widely used functional ...
We report the ferroelectricity and ferromagnetism coexistence in the Fe-doped BaTiO 3. Our first-principles calculation based on the density-functional theory …
3+. doping on the physical properties of BaTiO. 3. Fe 3+ incorporation into the structure of BaTiO 3 promotes the stabilization of a non-ferroelectric hexagonal phase instead of a tetragonal one. The processing conditions of temperature and time for the samples entail shorter processing times and energy consumption.
The structural and physical properties of pseudocubic thin-film BaTi1−xFexO3(0.5⩽x⩽0.75) grown by pulsed-laser deposition are reported. This material is of interest because the corresponding bulk compounds have hexagonal structure for comparable x, and because the films are both ferroelectric and ferrimagnetic well above …
Co doped BaTiO3 catalyst showed better activity with only 0.5 mol. % doping than Fe and Ni doped BaTiO3 catalysts with maximum nitrobenzene conversion of 91% with 78% selectivity to azoxybenzene.
Electrical properties of Fe-doped BaTiO3. The polymorphism of BaTi 1−x Fe x O 3−δ solid solutions: 0 . x 0.1, prepared by a sol–gel method, has been determined and presented in the form of a temperature–composition phase diagram for T > ∼1000 °C.. With increasing x, the high temperature hexagonal polymorph is stabilised to increasingly lower …
The Fe-doped BaTiO3 ceramics with various iron concentration were prepared by the conventional ceramic technology. Structure of the samples was studied by X-ray diffraction, scanning electron ...
The photocurrent address the the better performance of Fe-doped BaTiO3 in the density obtained with undoped BaTiO3 sample sintered at PEC cell. 900 °C was 0.07 mA cm 2 at 0.5 V/SCE, whereas the maximum photocurrent density recorded in the sample doped with 2.0 4. CONCLUSION atom % Fe was 2.55 mA cm 2 at 0.5 V/SCE (Figure 10) Doping of …
Fe3+ doped BaTiO3 (BaTi1 − xFexO3) with x = 0.0, 0.2, 0.4 and 0.6 of Fe3+ contents was synthesized using the solid–state reaction method. The powders were calcinated at 1100 °C and sintered at 1200 °C for 6 h. The evolution of structural properties of the synthesized Fe3+-doped BaTiO3 particles was analyzed. X-ray diffraction patterns …
Interest in doped BaTiO 3 (BTO) single crystals has increased in the past decade after seminal results showing that (001) cut and poled crystals doped at the Ti 4+ site with either Fe 3+ or Mn 3+ were shown to have large and recoverable electrostrain of up to 0.8%, significantly higher than approximately 0.05% which can be obtained reversibly ...
A single crystal of BaTiO 3 doped with Fe (0.3%) 100) was used for conductivity and PV measurements. We prepared two samples with different iron valance states: reduced and oxidized ones. For the reduced sample, we performed an annealing at an oxygen partial pressure at 900 °C (po 2 900 °C) of 10 −23 atm for 100 h.As a …
Doped BTO is widely studied because of its ferroelectricity and transition to semiconducting behavior upon suitable doping. Here, we report on the effect of Fe doping on the structural, electrical and optical properties of Ba 0.95 La 0.05 Ti 1−x O 3 (BLTO) ceramic samples. Samples with x = 0.0 to 1.0 in step of 0.25 were synthesized by solid ...
In order to further probe the doping-induced structural change, we have recorded Raman spectra BaTi 1−x Fe x O 3 at room temperature. The Raman spectra of BaTi 1−x Fe x O 3 samples recorded at room temperature are shown in Fig. 2.Four prominent Raman peaks at 261, 303, 516, and 720 cm −1 are observed for x = 0, which is …
We have calculated the phonon energy and damping of ω0=264cm−1 in Fe, Mn, and Dy doped BaTiO3 using a microscopic model. By doping with Fe ions, the phonon energy ω and damping γ show ...
The Fe-doped BaTiO3 ceramics prepared by the solid-state-reaction method show simultaneously the ferromagnetic order with the magnetic transition temperature over 680 K and the ferroelectric order ...
These coincide with electronic instabilities of the Fe-doped 3C-BaTiO3-δ pseudocubic polymorph. Moreover, the distribution of iron dopants with frozen magnetic …
Онлайн чат
Шууд утас