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In particular, in it was shown that ZnO sample with 1% Fe shows diamagnetic behavior though samples from 2 and 3% Fe show the ferromagnetic nature, and samples with higher doping level of Fe show paramagnetism; in NPs O (, 0.04, 0.06, 0.08, 0.10), received by the sol-gel method, show the room temperature ferromagnetism (RTFM) at 2% Fe; other ...
12%y mol% Fe-doped Ba (Zr 0.2 Ti 0.8 )O 3 — x mol% (Ba 0.7 Ca 0.3 )TiO 3 (abbreviated as y Fe:BCZT x) ferroelectric ceramics with y = 0, 0.375, 0.75, and 1.5 across the morphotropic phase boundary (MPB) with x = 44 and 56 were fabricated via conventional solid state reaction methods.
The solid state route needs high calcinations temperature to get perovskite phase and often results in the formation of multiphase and inhomogeneous powders .High energy ball milling is also reported to produce 10nm particle size but the approach suffers from small batch size, high processing time and energy consumption.
2% Fe, 1.5% La 0.5% Pb0.985La0.015Zr0.60Ti0.38Fe0.02O3 6.5% Fe, 6% La 0.5% Pb0.94La0.06Zr0.60Ti0.335Fe0.065O3 7% Fe, 6% La 1% Pb0.94La0.06Zr0.60Ti0.33Fe0.07O3 After the solid state reaction the compounds were again milled in ethanol under the same conditions as before, dried at 80 C, and sieved to reduce the agglomerate size to less than 180 m.
Pure and doped BaTiO 3 were prepared through mechanical milling and conventional solid-state reaction methods. The XRD analysis revealed the formation and progressive increase of a hexagonal phase with the addition of Fe 3+.
The Ni- and Ti-modified BiFeO 3 nanoceramic (i.e., Bi(Ni 0.45 Ti 0.45 Fe 0.10 )O 3 ) with various effective ball milling times (i.e., 10 h, 20 h and 30 h) were blended by planetary (high energy) ball milling method in conjunction with a traditional solid-state reaction route. The outcome of milling time on various properties, such as structural, electrical and ferroelectric features of Ni/Ti ...
A series of morphotropic phase boundary (MPB) compositions of (1–x)Na 1/2 Bi 1/2 TiO 3-xBaTiO 3 (x = 0.05, 0.055, 0.06, 0.065, 0.07), with and without 0.5 mol% Zn-doping was synthesized using the solid-state route. The samples were characterized using X-ray diffraction, dielectric analysis, and electromechanical measurements (piezoelectric d 33 coefficient, coupling factor k p, mechanical ...
The purpose of this work is to analyze the magnetic and structural properties of Fe-doped ZnO obtained by mechanical alloying changing the concentration of Fe and the milling times. Experimental Elemental powders of ZnO and Fe (>99.9 % purity) were utilized with …
LiFeSi0.03P0.97O4/C composite materials with variations in duration of milling are 4, 8, 12, and 16 h have been synthesized successfully by solid-state process. The iron stone from Tanah Laut Kalimantan used as source of ion Fe and Glucose used as material coating. The result of XRD have shown all of the samples have a olivine LiFePO4 phase except for milling 16 h.
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 ...
In Mn-doped BaTiO3 film [20], Mn ions were in Mn2+ state, 62 along with less amount Mn3+ and Mn4+ ions. ... On the other hand, the imaginary part of the 398 393 solid state and mechanical alloyed samples in complex modulus electrical modulus (M00 ) responds to the smallest capacitance, 399 20 (a) BTMO-bulk (d) contribution from grains 0.5 15 ...
Nb doped BaTiO3 ceramic powders were homogenized by conventional mechanical milling method and ultrasonic method. Nb doped BaTiO3 powders were prepared by solid state reaction.
, such as chemical and solid-state methods [10-14]. Nevertheless, most of the current methods face some issues like low production yield and the use of some toxic chemical compounds. Therefore, the development of a new fabrication method is still required. High energy mechanical milling is a solid-state method used to dope Fe in TiO 2
Lead zirconate-titanate [Pb(Zr,Ti)O 3 (PZT)] is the most widely used piezoceramic material for electromechanical device applications. The toxicity and environmental impacts of lead have been known since the ancient times, 1 1. S. J. S. Flora, G. Flora, and G. Saxena, " Environmental occurrence, health effects and management of lead poisoning," in Lead: Chemistry, Analytical Aspects ...
BaTiO 3 was synthesized by using conventional solid state reaction method from fine powder of BaCO 3 (99.9%) and TiO 2 (99.9%). These powders were mixed in appropriate ratio and ball milled for 3 h. The mixed powder was calcined at 1100 °C for 1.5 h.
For NBT6BT-0.5, T F-R increases by 40 °C. In the prior work on Zn 2+-doping 15, the change in T F-R is the same as reported here except for the difference in the doping concentration, which can be attributed to the sensitivity of NBT to the Na + and Bi 3+ concentration, since they are volatile. For NBT9BT-0.5, T F-R increases to 196 °C (Table 1).A further increase in T F-R by 15-17 o C is ...
Barium titanate (BaTiO3) powders of varying particle sizes were grown under hydrothermal conditions at a temperature of 240 °C. This was accomplished by varying the hydroxide concentration of the reaction medium as well as the time required for synthesis. The spectroscopic, thermal, and microscopic characteristics of three BaTiO3 powders with average particle sizes 0.09, …
The oxidation state of the metal ions in the sintered samples analysed by means of X-ray photoelectron spectroscopy showed the presence of Ti⁴⁺2p3/2 and Ti⁴⁺2p1/2 peaks in Fe-doped BaTiO3 ...
Such a reduction of Fe 3+ to Fe 2+ at the surface has indeed been reported for other rare earth orthoferrites prepared by mechanical milling such as PrFeO 3 [49] or by the conventional ceramic ...
Möss characterization of Fe-doped ZnO prepared by mechanical milling. Download. Related Papers. Möss study on Zn1 − x Fe x O semiconductors prepared by high energy ball milling. By L. Damonte. Trivalent dopants on ZnO semiconductor obtained by mechanical milling.
12%Fine (Ba0.98Ca0.02)1.002TiO3 powders for high capacitance multilayer ceramic capacitors (MLCCs) application were synthesized by solid state reaction method. The effects of mechanochemical activation using high energy milling and the starting materials properties on the reaction temperature and on the final powder properties were investigated. Previous heavy …
Abstract A comparative study of the surface morphology, dielectric and magnetic properties of the BaTi0.5Mn0.5O3 (BTMO) ceramics has been carried out by synthesizing the samples in different routes. BTMO samples have shown single phased 12R type hexagonal structure with R 3 ¯ m space group. Interfacial effects on the dielectric properties of the samples have been understood by Cole–Cole ...
Abstract In this work, we present a study of the structural, optical, ferroelectric and dielectric properties of BaTiO3 doped with diluted quantities of Fe3+ (x = atomic fraction; x = 0, 0.01, 0.02, 0.04; BaFexTi1-xO3). Pure and doped BaTiO3 were prepared through mechanical milling and conventional solid-state reaction methods. The XRD analysis revealed the formation and progressive increase ...
In this work, we report a rapid stability phenomenon of ferroelectric polarization in the Ca, Ce hybrid doped BaTiO3 ceramics (BCaxT+BTCe8) (x …
Abstract The structural and magnetic properties of Fe-doped ZnO are reported in this study, as obtained by mechanical alloying from elemental powders of ZnO and Fe. The properties of Zn 0.90Fe 0.10O samples alloying while varying the milling time (6, 12, 24 and 36 h) are also reported.
using solid-state reaction. Analytical-grade BaCO3, Fe2O3, Bi2O3, TiO2, Nd2O3, Li2CO3 and Nb2O5 powders were weighed in the appropriate stoichiometric proportions and balled milled for 16 h. After calcination, 0.1 wt% of Mn2O3 was added, followed by further milling for 16 h.
Fe-doped BaTiO 3 has been prepared by the solid state reaction method. Nanonization of sample has been achieved by using high energy ball milling. Tetragonal phase along with a small amount of hexagonal phase has been identified by room temperature …
