@misc{etde_21268881, title = {Magnetic and dielectric properties of barium titanate-coated barium ferrite} author = {Chao, Wang, Han Xijiang, E-mail: hanxj63@yahoo, Ping, Xu, Xiaohong, Wang, Xueai, Li, and Hongtao, Zhao} abstractNote = {Flaky barium ferrite with hexagonal molecular structure was …Web

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The autoclave was maintained at 200 °C in air dry oven for 24 h and barium titanate/cobalt ferrite core/shell composite was obtained. Composites were prepared by mixing BTO or BTO/CFO (75 wt. %) and paraffin wax uniformly and then pressed into toroidal-shaped samples with an outer diameter of 7.00 mm and an inner diameter of …Web

Preparation of barium titanate-coated barium ferrite composite particles ... Sample D is taken as an example to compare the calculated value from Eq. (6) and measured value in Fig. 5 (d). The calculated value is lower than the measured, which may be caused by the interfacial effect between BaTiO 3 and BaFe 12 O 19 particles.Web

1. Introduction. Bismuth titanate (Bi 4 Ti 3 O 12) belongs to the Aurivillius family and has attracted considerable interest due to its potential application in a variety of electronic devices such as capacitors, memory devices and sensors [1], [2], [3].The structure of these ferroelectrics consists of [Bi 2 O 2] 2+ layers interleaved with perovskite-like [A …Web

It was also documented that in the case of M-type barium hexa ferrite, the lattice parameter c = 23.17 Å and a = 5.89 Å, but in the case of SrM ferrite, the lattice parameters c = 23.03 Å and a = 5.86 Å for PbM ferrite, the lattice parameters are c = 23.02 Å and a = 5.88 Å the cross-section view of the M-type ferrite structure.Web

The barium titanate (BaTiO 3) crystal is ferroelectric at room temperature.The crystal structure is perovskite, cubic above the Curie temperature, and tetragonal below the Curie temperature. BaTiO3 has photorefractive properties and other associated effects and applications, such as phase conjugation, volume holography for optical storage, two …Web

In this manuscript, we propose applications of barium titanate core-gold shell nanoparticles for hyperthermia treatment against cancer cells. We explored the effect of increasing concentrations of these nanoshells (0-100 μg/mL) on human neuroblastoma SH-SY5Y cells, testing the internalization and intrinsic toxicity and validating the ...Web

The dielectric constant of the BaTiO 3 ceramics first increases with decreasing average grain size, reaching a maximum value in the ~ 0.8–1.1 μm grain size range and then rapidly decreases with ...Web

The characteristic peaks of cobalt ferrite (CFO-ICSD # 98553, Fd-3m) and barium titanate (BTO-ICSD # 29147, P4mm) are observed, which is evidence of the successful synthesis of the composites. However, for the x = 0.1–0.5 concentrations, there are trace amounts of the secondary phase BaCo 0.856 Fe 10.288 Ti 0.856 O 19 (BCFTO …Web

Since solid state synthesis of barium ferrite / barium titanate composite at T = 1300 °C proved to be impossible due to the presence of a eutectic (compacted raw …Web

We report the magnetic properties of Ba0.99Sm0.01TiO3 (BSmT1) sample synthesized through the sol–gel process. The sample consisted of crystallites of nanometric sizes (33.2 nm). The magnetization was measured at different temperatures and different magnetic applied fields using the vibrating-sample magnetometer (VSM) technique. The …Web

Introduction As oxide perovskite material, barium titanate BaTiO3 ( BTO) is widely studied by researchers owing to its physical properties [ [1], [2], [3]]. The particular …Web

temperatures (180–380 K). The best compromise between barium titanate and gadolinium ferrite in the composition was calculated in order to obtain a potential material for electrical energy storage. The sample with 25% gadolinium ferrite presented the best results. The dielectric constant reached values of the order of 2000, at 1 kHz and …Web

Practical High Piezoelectricity in Barium Titanate Ceramics Utilizing Multiphase Convergence with Broad Structural Flexibility. Journal of the American …Web

Interaction parameter, δ M, as a function of applied d.c. field for barium ferrite inks milled for various times. The cryo-VSM technique was used to keep the ink frozen in order to eliminate particle motion. Much information about the ink can be obtained by observing the motion of the particles in a magnetic field.Web

Composites based on barium titanate and nickel zinc ferrite doped with cooper and samarium were prepared by a mixing method. The formation of barium titanate tetragonalcrystal structureand nickel zinc ferrite cubic spinel structure was identified. Polygonal grains were formed in all three types of ceramics. Due to the veryWeb

Ferrite Materials. R.K. Kotnala, Jyoti Shah, in Handbook of Magnetic Materials, 2015 10.1 Barium Ferrite. Hexagonal barium ferrite is used as good microwave absorber due to high resistivity, large permeability, high magnetization value, and good dielectric properties at microwave frequency. Barium ferrite exhibits magnetoplumbite structure in which the …Web

1. Introduction. A barium ferrite with basic formula BaFe 12 O 19, space group P6 3 /mmc, has been widely used as a hard magnetic material for permanent magnets since its first introduction by Philips [1].Their magnetic properties arise from interactions between metallic ions occupying particular positions relative to the oxygen …Web

3.1 Introduction. The word 'ferrite', derived from the Latin 'ferrum' means iron. The first type of magnetic material known to human was lodestone which is made up of the ore magnetite (Fe 2 O 3 ). Ferrite is a ceramic material made by mixing iron oxide with a metallic element. They are electrically non-conducting insulators.Web

Read this article. Samples of ceramics based on barium ferrite (BF) and barium titanate (BaTiO 3) were obtained and studied. We have analyzed the elemental …Web

Effective pyromagnetic * 3 (a and c) and electromagnetic * 33 (b and d) Coherence Coefficients for Ferrite / barium titanate composite with different polydisperse structures: (1, 3 and 5 ...Web

incorporation of the barium titanate phase and have been proven. In the composite ceramics with a higher amount of magnetic phase a distortion in the crystal lattice occurred and can be correlated with Figure 1. IR spectra of Nickel ferrite. Figure 2. IR spectra of Nickel ferrite—Barium titanate. Figure 3. XRD of Nickel Ferrite. Figure 5.Web

Multiferroic composite materials based on antimony doped barium titanate/nickel ferrite were prepared by a mixing route. In order to obtain fine grained microstructure composite materials, pure constituent phases were prepared via chemical methods.The optimization of processing parameters has been made in order to reduce …Web

Energy harvesting utilizing piezoelectric materials has become an attractive approach for converting mechanical energy into electrical power for low-power electronics. Structural …Web

Barium ferrite-barium titanate composite systems, (1-x)BaFe12O19 – (x)BaTiO3 with different weight fractions of x = 0.0, 0.1, 0.3 and 0.5 were prepared via the conventional solid state reaction method using nano-sized starting materials. The x-ray diffraction peaks of the composite samples show two phases which can be indexed by the hexagonal ...Web

The material with high permittivity with low power loses are suitable for ferroelectric material of Barium titinate [1,2]. The necessary and the required magnetic and electric coupling behavior can be adjusted with proper tuning of volume ratio by changing the phases between the cobalt ferrite and barium titanate [[3], [4], [5], [6]].Web

Barium ferrite addition to barium titanate increases the permittivity of the composite and also diffuses the ferroelectric phase transition and shifts the permittivity maximum temperature by 10 ...Web

A preparation method of a doped bismuth ferrite-barium titanate lead-free piezoelectric ceramic material belongs to the field of lead-free piezoelectric ceramic materials. The preparation method is represented by the chemical formula (1-x) Bi 1‑y M y Fe 1‑z N z O 3 ‑xBaTiO 3 Calculating the mass of each raw material, accurately …Web

barium titanate and cobalt ferrite are the same, the intensity of the BaTiO3 diffraction peaks are higher than that of the cobalt ferrite peaks. This is because the high electron density of the ...Web

In this paper, single-phase and fine-grain hexagonal barium ferrite powder was prepared based on the optimal calcination condition. The influence of calcination conditions including temperature and holding time on microstructure and magnetic properties of powder were studied in detail. Firstly, θ–2θ scan X-ray diffraction (XRD) …Web

Barium titanate is one of the most studied perovskite materials owing to its ability to the substitution in both sites, to its high dielectric constant and to its stability. ... Dielectric and magnetic properties of Nickel ferrite ceramics using crystalline powders derived from DL alanine fuel in sol–gel auto-combustion. Ceram. Int., 41 (2015Web

This work investigates the dielectric properties of barium titanate/gadolinium ferrite ceramic composites, with different concentrations of each material. Our objective …Web

In this work, an affordable liquid phase based method to fabricate a magnetoelectric multiferroic nanocomposite film is reported. Ferroelectric BaTiO3 (BTO) nanotube …Web