Zirconium Tungstate
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Addition of zirconium oxide to Biodentine increases radiopacity and does not alter its physicochemical and biological properties
Abstract Objectives: To evaluate the radiopacity of Biodentine (BD) and BD associated with 15% calcium tungstate (BDCaWO4) or zirconium oxide (BDZrO2), by using conventional and digital radiography systems, and their physicochemical and biological properties. Materials and Methods: Radiopacity was evaluated by taking radiographs of cement specimens (n=8) u
J. Appl. Oral Sci.. Publicado em: 01/04/2019
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2. Apical adaptation, sealing ability and push-out bond strength of five root-end filling materials
This study compared the fluid filtration, adaptation to the root canal walls, and the push-out bond strength of two resin-based sealers and three calcium silicate-based retrograde filling materials. Fifty maxillary canines were shaped using manual instruments and the apical portion was sectioned. Retrograde cavities of 3-mm depth were prepared. The specimens
Braz. oral res.. Publicado em: 26/08/2014
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3. Avaliação de diferentes potenciais interatômicos no cálculo do tensor de elasticidade do tungstato de zircônio
O Tungstato de Zircônio (ZrW2O8) é um material que exibe Expansão Térmica Negativa (ETN), isotrópica em um amplo intervalo de temperatura (0,3 a 1050 K). Apesar de amplamente estudado, existem controvérsias acerca dos mecanismos microscópicos responsáveis por este comportamento. A fase cúbica deste composto, denominada a-ZrW2O8, já foi motivo de es
Publicado em: 2009
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4. Estrutura e propriedades elásticas das fases alpha e gama do ZrW2O8
The crystalline structure and some elastic properties of the alpha and gamma phases of zirconium tungstate, ZrW2O8, were calculated according to Density Functional Theory using the B3LYP functional (DFT/B3LYP). The structure of alpha ZrW2O8, was optimized at different pressures and its elastic constants were estimates. The interatomic iterations, ranked in t
Publicado em: 2007
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5. Expansão térmica sintonizável do ZrW2O8
Zirconium tungstate (a-ZrW2O8) exhibits isotropic negative thermal expansion over a wide range of temperature. Under high-pressures this material transforms to a metastable amorphous phase (a-ZrW2O8). a-ZrW2O8 can be fully recovered by annealing the amorphous phase at temperatures slightly above 600oC, at room pressure. The amorphous phase, in principle, sho
Publicado em: 2007