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Decreasing the time response of calibration-free pH sensors based on tungsten bronze nanocrystals
(Elsevier, 2017)
A considerable improvement of time constants of tungsten bronze pH sensors was achieved by decreasing the crystal size of the tungsten bronze previously reported by the authors. Experiments have been performed on the basis ...
Facile microwave-assisted hydrothermal synthesis of hexagonal sodium tungsten bronze and its high response to NO2
(2016-12-15)
Single-phase hexagonal sodium tungsten bronze (h-NaxWO3+x/2·yH2O) was synthesized via a microwave-assisted hydrothermal method. A reaction time of 4 min was sufficient to obtain well-crystallized nanoplates with a thickness ...
Rankamaite from the Urubu pegmatite, Itinga, Minas Gerais, Brazil: Crystal chemistry and Rietveld refinement
(MINERALOGICAL SOC AMER, 2011)
A new occurrence of rankamaite is here described at the Urubu pegmatite, Itinga municipality, Minas Gerais, Brazil. The mineral forms cream-white botryoidal aggregates of acicular to fibrous crystals, intimately associated ...
Structural characterization and Curie temperature determination of a sodium strontium niobate ferroelectric nanostructured powder
(Academic Press Inc. Elsevier B.V., 2011-05-01)
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 ...
Structural characterization and Curie temperature determination of a sodium strontium niobate ferroelectric nanostructured powder
(Academic Press Inc. Elsevier B.V., 2011-05-01)
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 ...
Structural characterization and Curie temperature determination of a sodium strontium niobate ferroelectric nanostructured powder
(Academic Press Inc. Elsevier B.V., 2014)
A Brief Overview Of Metal Analysis In Alloys And Related Matrices: Some Classical Methods And Modern Spectroscopic Methods [uma Breve Visão Sobre A Determinação De Metais Em Ligas Metálicas E Matrizes Semelhantes: Alguns Métodos Clássicos E Espectroscópicos Modernos]
(Secretaria Regional do Rio de Janeiro da Sociedade Brasileira de Quimica, 2014)