Now showing items 601-609 of 609
Influence of the common varistor dopants (CoO, Cr2O3 and Nb2O5) on the structural properties of SnO2 ceramics
(Materials Characterization, 2004-07-01) [Artigo]
The influence of dopants commonly used in SnO2 varistor ceramics, such as CoO, Cr2O3 or Nb2O5, on the structural properties of SnO2 was investigated. Several SnO2-based ceramics containing only one of the dopants were ...
Synthesis and optical property of MgMoO4 crystals
(Electroceramics Vi, 2014-01-01) [Trabalho apresentado em evento]
In this work, we report on the synthesis of MgMoO4 crystals by oxide mixed method. The powder was calcined at 1100 degrees C for 4h and analyzed by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), Field emission ...
Influence of the preparation route on the structural, morphological and spectroscopic properties of SrTiO3 and SrTiO3:eu3+ powders
(MRS Proceedings, 2013) [Artigo]
This research shows the influence of the synthesis route in the structural and morphological characteristics as well as in the luminescent properties of doped with europium and pure SrTiO3 (STO) powders prepared by microwave ...
SnO2 dense ceramic microwave sintered with low resistivity
(Materials Sciences and Applications, 2012) [Artigo]
The Hall-Héroult process is used for alumina reduction by the use of graphite anodes even though it involves a high emission of carbon dioxide (CO2) and several other organic compounds. Proposals have been made aiming at ...
Piezoresponse force microscopy behaviour of Bi4Ti3O12 ceramics with various excess bismuth
(Processing and Application of Ceramics, 2011) [Artigo]
Bismuth titanate (Bi4 Ti3 O12 - BIT) ceramics derived from different amounts of excess Bi2 O3 were prepared using the polymeric precursor method. In spite of excess bismuth, single phase ceramics were obtained with a ...
Synthesis and characterization of NaNbO3 mesostructure by a microwave-assisted hydrothermal method
(MRS Proceedings, 2014) [Artigo]
In the present work, we report the synthesis and characterization of NaNbO3 particles obtained by microwave-assisted hydrothermal method from Nb2O5 and NaOH. The synthesis was made at different periods at 180 °C and 300W. ...
Modification of complex materials using a pressure-assisted heat treatment
(Recent Advances in Complex Functional Materials: From Design to Application, 2017-07-12) [Capítulo de livro]
Investigation of electrical properties of tantalum doped SnO2 varistor system
(Ceramics International, 2005-01-01) [Artigo]
Ta2O5 doped SnO2 varistor systems containing 0.5 mol% ZnO and 0.5 mol% Coo were prepared by mixed oxide method. Considering that ZnO and Coo oxides are densification additives only the SnO(2)center dot ZnO center dot CoO ...
Ferroelectric and dielectric properties of lanthanum-modified bismuth titanate thin films obtained by the polymeric precursor method
(Journal of Electroceramics, 2004-07-01) [Artigo]
Lanthanum-modified bismuth titanate, Bi4-xLaxTi3O12 (BLT), thin films with a La concentration of 0.75 was grown on Pt/Ti/SiO2/Si substrates by using the polymeric precursor solution and spin-coating method. The scanning ...