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Influence of mechanical activation on the structure of ultrafine BaTiO3 powders
(Journal of Alloys and Compounds, 2009)
The influence of mechanical activation in a planetary ball mill on the change of the structure of BaTiO3 powders has been investigated. The particle size distribution of the nonactivated and activated samples was measured ...
Study of non-isothermal crystallization of Eu3+ doped Zn2SiO4 powders through the application of various macrokinetic models
(Journal of Alloys and Compounds, 2014)
Various macrokinetic models (Avrami, Evans, Tobin, Malkin, Dietz, Nakamura, and modified first-order models) were applied to describe non-isothermal crystallization kinetics of Eu3+ doped zinc silicate powders prepared via ...
Morphological, structural and magnetic properties of alpha-Fe2O3 nanoparticles in an amorphous alumina matrix obtained by aqueous combustion method
(Journal of Alloys and Compounds, 2009)
We report on morphological, structural and magnetic properties of alpha-Fe2O3 nanoparticles in an amorphous alumina matrix synthesized by aqueous combustion method. The sample was characterized by X-ray powder diffraction ...
Structural, mechanical and tribological properties of A356 aluminium alloy reinforced with Al2O3, SiC and SiC plus graphite particles
(Journal of Alloys and Compounds, 2010)
Particulate composites with A356 aluminium alloy as a matrix were produced by compocasting process using ceramic particles (Al2O3, SiC) and graphite particles. The matrix alloy and the composites were thermally processed ...
Unusual magnetic properties of NiO nanoparticles embedded in a silica matrix
(Journal of Alloys and Compounds, 2011)
We have observed unusual magnetic properties of NiO (nickel oxide) nanoparticles embedded in a silica matrix. The sample was synthesized by a method based on the contribution of sol-gel and combustion processes. X-ray ...
Influence of heavy rare earth ions substitution on microstructure and magnetism of nanocrystalline magnetite
(Journal of Alloys and Compounds, 2009)
In this work we report results on the influence of heavy rare earth ions substitution on microstructure and magnetism of nanocrystalline magnetite. A series of Fe(2.85)RE(0.15)O(4) (RE = Gd, Dy, Ho, Tm and Yb) samples have ...
Core and shell structure of ytterbium sesquioxide nanoparticles
(Journal of Alloys and Compounds, 2010)
This paper reports results concerning the crystal structure of core and shell as well as microstructure of 25 nm-ytterbium sesquioxide (Yb(2)O(3)) nanoparticles synthesized using a unique method based on thermal decomposition ...
Room-temperature ferromagnetism in Ni2+ doped TiO2 nanocrystals synthesized from nanotubular precursors
(Journal of Alloys and Compounds, 2014)
Hydrothermal synthetic route for synthesis of Ni2+ doped TiO2 nanocrystals showing room temperature ferromagnetism, using dispersion of titania nanotubes in the presence of Ni2+ ions at different pHs as precursors, is ...
Magnetic properties of NiMn2O4-delta (nickel manganite): Multiple magnetic phase transitions and exchange bias effect
(Journal of Alloys and Compounds, 2014)
We present magnetic properties of NiMn2O4-delta (nickel manganite) which was synthesized by complex polymerization synthesis method followed by successive heat treatment and final calcinations in air at 1200 degrees C. The ...
Experimental and ab initio study of the electric field gradients at Ta and Cd impurities in TiAl3
(Journal of Alloys and Compounds, 2009)
The hyperfine quadrupole interaction parameters and their temperature dependence for Hf-181/Ta-181 probe in TiAl3 compound were determined using the time differential perturbed angular correlation (TDPAC) method. in addition, ...