Now showing items 1-6 of 6
Comportamento elétrico a alta temperatura de termistor cerâmico alfa-Fe2O3 com coeficiente de temperatura negativo
(Cerâmica, 2008-12-01) [Artigo]
O comportamento elétrico da cerâmica densa de α-Fe2O3, sintetizada pelo método Pechini, foi investigado por espectroscopia de impedância na faixa de freqüência de 5 Hz a 13 MHz. As medidas foram realizadas entre 298 K e ...
Structural characterization and Curie temperature determination of a sodium strontium niobate ferroelectric nanostructured powder
(Journal of Solid State Chemistry, 2011-05-01) [Artigo]
The Curie temperature and its correlation with the magnitude of the displacement of the niobium atom from the center of [NbO6] octahedra in NaSr2Nb5O15 nanostructured powder were investigated. A single powder was prepared ...
Spray layer-by-layer films based on phospholipid vesicles aiming sensing application via e-tongue system
(Materials Science & Engineering C-materials For Biological Applications, 2012-05-01) [Artigo]
The Layer-by-Layer (LbL) technique via spraying (spray-LbL) has been applied as new and alternative methodology to fabricate ultrathin films due to its versatility in relation to the conventional dipping-LbL method, mainly ...
Electrical characterization of poly(amide-imide) for application in organic field effect devices
(Organic Electronics, 2012-10-01) [Artigo]
The admittance spectra and current-voltage (I-V) characteristics are reported of metal-insulator-metal (MIM) and metal-insulator-semiconductor (MIS) capacitors employing cross-linked poly(amide-imide) (c-PAI) as the insulator ...
Electrical conductivity of silicate glasses with tetravalent cations substituting Si
(Journal of Non-Crystalline Solids, 2012-10-15) [Artigo]
The effects of substituting Si by M4+ cations in soda-lime silica glasses were analyzed by impedance spectroscopy in the frequency range of 1 Hz-1 MHz. The glass composition was (mol%) 22Na(2)O center dot 8CaO center dot ...
Electrical conductivity of Ag-Na ion exchanged soda-lime glass
(Solid State Ionics, 2014-11-01) [Artigo]
This paper reports on a study of the influence of silver on the electrical conductivity of Ag-Na ion exchanged soda-lime-silica glass. A glass of 22Na(2)O.8CaO.70SiO(2) (mol %) composition was prepared and silver was ...