Results 181 to 190 of about 2,931 (212)
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Preparation of nanocrystalline ferroelectric BaBi4Ti4O15 by Pechini method
Materials Letters, 2006A gel was formed when an aqueous solution of BaCl2, BiNO3, TiOCl2 and citric acid in stoichiometric ratio is heated on a water bath. This gel on decomposition at 600 °C produced the nano crystallites of ternary oxide, BaBi4Ti4O15 (BBT). The phase contents and lattice parameters were studied by the powder X-ray diffraction (XRD).
A. Vadivel Murugan, S.C. Navale, V. Ravi
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Modified Pechini synthesis of hexaferrite Co2Z with high permeability
Materials Letters, 2012Abstract Magnetic ceramic hexagonal ferrites with strong magnetocrystalline anisotropy are considered for application in high frequency antennas. In particular, Ba 3 Co 2 Fe 24 O 41 (Co 2 Z) is expected to exhibit a high permeability and low loss at frequencies > 1 GHz.
Lang Qin, Henk Verweij
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Chemical Synthesis by Pechini Method for Obtation of ZnO Varistors
Materials Science Forum, 2005The zinc oxide varistors are ceramic semiconductor devices doped with some metallic oxides such as: bismuth, nickel, manganese, cobalt, and others. The aim of this work is to characterize the varistors, obtained by the Pechini’s method, regarding their microstructure and electrical features.
P.C. Ribeiro +4 more
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BaTi1–xZrxO3 nanopowders prepared by the modified Pechini method
Journal of Thermal Analysis and Calorimetry, 2007The results reported here based on a study of BaTi1–xZrxO3 (x=0, 0.2 and 1) nanometric powders prepared by the modified Pechini method. The powder samples annealed from 600 to 1000°C/2 h were characterized by thermogravimetric analysis (TG), differential scanning calorimetry (DSC), X-ray diffraction (XRD) and scanning electron microscopy (SEM ...
M. I. B. Bernardi +5 more
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Kinetics of Nanoscale Cerium Dioxide Prepared by Pechini Process
Journal of Materials Engineering and Performance, 2010The crystallization kinetics of nanoscale cerium dioxide particles prepared by Pechini method was investigated by various non-isothermal methods using differential scanning calorimetry. The activation energies for the crystallization calculated from modified Kissinger and Ozawa equations are 19.7 and 22.4 kJ/mol, respectively, which are much lower than
Teng Zhang +3 more
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Synthesis and luminescent properties of YGG:Tb phosphors by Pechini method
Journal of Luminescence, 2007Abstract A novel green phosphor Y 3 Ga 5 O 12 :Tb (YGG) was successfully synthesized by Pechini method. The differential scanning calorimetric (TG-DSC) analysis and X-ray powder diffraction were used to determine the crystallization temperature and the pure phase phosphors were obtained by calcining the gel at 800 °C.
Nanfei Zhu +3 more
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Synthesis and characterization of nanocrystalline Yb:Lu2O3 by modified Pechini method
Materials Science and Engineering: B, 2008Abstract Cubic nanocrystalline Yb:Lu 2 O 3 in the size range of 50–100 nm were synthesized by modified Pechini sol–gel method. Differential thermal analysis and thermogravimetric analysis (DTA–TG) were used to study the thermal evolution of the precursor powder. Moreover, together with the results of X-ray powder diffraction (XRD) indicated that the
M. Galceran +3 more
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2006
Nickel-oxide-yitria-stabilized zirconia (NiO-YSZ) powder mixtures were prepared using a Pechini-type sol-gel route. Metal chlorides/nitrates and citric or ascorbic acid were used to prepare the metal-carboxylic acid complexes. Their subsequent polyesterification with ethylene glycol at moderate temperatures yielded a homogeneous polymer resin.
Francetič, Vojmir +2 more
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Nickel-oxide-yitria-stabilized zirconia (NiO-YSZ) powder mixtures were prepared using a Pechini-type sol-gel route. Metal chlorides/nitrates and citric or ascorbic acid were used to prepare the metal-carboxylic acid complexes. Their subsequent polyesterification with ethylene glycol at moderate temperatures yielded a homogeneous polymer resin.
Francetič, Vojmir +2 more
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SÍNTESE DE HIDROXIAPATITA PELO MÉTODO PECHINI
Proceedings of the 2nd (ICAIC) International Conference for Academia and Industry Co-operation & 2nd (IMMSEM) International Meeting in Materials Science and Engineering of Maranhão, 2021José Rosa de Souza Farias +5 more
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