نتایج جستجو برای: hexaferrite

تعداد نتایج: 389  

BADAEE A., , GHOBEITI HASAB M., , SEYYED EBRAHIMI S.A., ,

In this research the sol-gel auto-combustion method was used to prepare strontium hexaferrite nanopowder. A solution of distilled water, ferric and strontium nitrates, citric acid, trimethylamine, and n-decyltrimethylammonium bromide cationic surfactant, was heated to form a viscous gel. The gel was heated and then ignited automatically. As-burnt powder was calcined at temperatures from 700 to ...

2007
Philip Shepherd Kajal K. Mallick Roger J. Green

Stoichiometric and single-phase barium hexaferrite (BaM) has been synthesized by co-precipitation and an additional solid state preparative method using high-purity nitrates, oxides and carbonates of iron (III), barium (II) and ammonium hydroxide. The isochronally and isothermally measured permeability and magnetic loss tangents over 1MHz–1GHz in frequency remained moderately constant until a s...

Synthesis of BaFe12O19 magnetic nano particles via precipitation in different pH conditions have been reported. The certain molar ratio of Fe/Ba = 12 selected and sodium hydroxide was used as a precipitant agent. X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and vibrating sample magnetometer (VSM) were used to consider the structural, morphological and magnetic properties of bariu...

Journal: :Materials Chemistry Frontiers 2021

Texture and magnetic properties of aligned hexaferrite obtained from spark plasma sintering nanosized sixline-ferrihydrite platelets resulting in (BH)max = 33 kJ m−3.

Journal: :iranian chemical communication 2016
kamellia nejati shabnam alizade sara samuey zolfaghar rezvani

in the present work, the synthesis of barium hexaferrite (bafe12o19) nanoparticles in thepresence of a large excess amount of oh− anions by the hydrothermal method in the presence and absence of surfactants such as sodium dodecyl benzene sulfonate and triton x-114 was reported. the optimized temperature in the absence of surfactant was determined (200 °c) and then barium hexaferrite nanoparticl...

Journal: :international journal of nano dimension 0
s. abedini khorrami department of chemistry, azad university, north tehran branch, tehran, iran. r. islampour department of chemistry, azad university, north tehran branch, tehran, iran. h. bakhtiari department of chemistry, azad university, north tehran branch, tehran, iran. q. sadr manuchehri naeini department of chemistry, azad university, north tehran branch, tehran, iran.

nanocrystalline particles of barium hexaferrite has been prepared by the sol–gel auto- combustion method using iron and barium nitrate with a ba:fe molar ratio of 1:10. the effect of fuel such as citric acid and aspartic acid was investigated on the structure and magnetic properties of nanoparticles. the results revealed that the formation of barium hexaferritefine particles is influenced by mo...

2009
S V Salvi V H Joshi

Samples of Ba1.266Ti2.956 Fe7.6Li0.844O19 hexaferrite have been prepared using anatase and rutile phases of TiO2 by classical ceramic route. A pure sample of Ba Fe12O19 has also been prepared for comparison. The structural, electrical and magnetic characteristics have been studied by XRD, SEM, FTIR, two probe method, hysteresis loop and susceptibility curves. The samples exhibit hexagonal magne...

Journal: :Physical review research 2022

Understanding ultrafast magnetization dynamics on the microscopic level is of strong current interest due to potential for applications in information storage. In recent years, spin-lattice coupling has been recognized as essential dynamics. Magnetoelectric multiferroics type II possess intrinsic correlations among magnetic sublattices and electric polarization $(P)$ through coupling, enabling ...

2016
S. Torres A. Bravo

This paper focuses on the loading and release studies of tetracycline as model drug from spherical aggregates of micron size (approx. 1.2 μm in diameter) of barium hexaferrite (BaO·6Fe2O3) synthetized from wet chemical sol-gel method via spray drying. BaO·6Fe2O3 aggregates were characterized using x-ray diffraction and scanning electron microscopy. The load capacity of BaO·6Fe2O3 systems was re...

2015
Shivani Malhotra Mansi Chitkara

Microwave ferrites require high coercivity for their use as microwave absorbers. Strontium hexaferrite is one of the best material due to its magnetic properties , high coercivity, large unilateral magnetic anisotropy and very low cost in comparison to others make it suitable for the use as microwave components specifically microwave absorber .Strontium nano hexa ferrites were successfully synt...

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