Zirconium Oxide
Mostrando 1-12 de 48 artigos, teses e dissertações.
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1. Preparation and performance of magnetic zirconium-iron oxide nanoparticles loaded on palygorskite in the adsorption of phosphate from water
Magnetic zirconium-iron oxide nanoparticles loaded on palygorskite as a low-cost adsorbent was produced by one-step co precipitation technique and its properties for phosphate adsorption were overall investigated. The Brunauer Emmett Teller (BET) specific surface area analysis, scanning electron microscopy (SEM), thermo gravimetric analysis (TGA), Fourier tr
Química Nova. Publicado em: 2022
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2. Adsorption of Calcium(II), Cadmium(II) and Copper(II) Ions from Water by Prepared Silicon-Aluminum-Zirconium Oxide Using Sol-Gel Process
Ternary oxide silica-alumina-zirconia (SiO2/Al2O3/ZrO2) obtained by the sol-gel process was applied as novel adsorbent of ions in aqueous solution. Batch isotherms were performed using standard CuII, CdII and CaII solutions at variable pH and different concentrations. Adsorption capacity was best at weakly acidic pH. The maximum adsorption capacities were 2.
J. Braz. Chem. Soc.. Publicado em: 2021-07
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3. CHARACTERIZATION OF SILICON-ALUMINUM-ZIRCONIUM OXIDE OBTAINED BY THE SOL-GEL PROCESS
A new silicon-aluminum-zirconium ternary oxide (SiO2/Al2O3/ZrO2) was prepared by the sol-gel method followed by one-step washing with absolute ethanol or two-step washing with absolute ethanol followed by ultra-pure water. Both ternary oxides presented high surface area (over 340 m2 g-1). The binding energy values for Zr3d and Al2p levels showed the insertio
Quím. Nova. Publicado em: 18/07/2019
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4. Thermomechanical Characteristics of a Functionally Graded Mounted Uniform Disc with/without Rigid Casing
ABSTRACT In the present paper, thermomechanical attributes of a power-law graded uniform mounted disc with or without rigid casing are investigated analytically under centrifugal and steady-state thermal loads within the framework of axisymmetric infinitesimal plane-stress elasticity theory. Young's modulus, material density, thermal expansion coefficient an
J. Aerosp. Technol. Manag.. Publicado em: 13/06/2019
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5. A randomized clinical trial of cavity liners after selective caries removal: one-year follow-up
Abstract Alternatives for the treatment of caries disease, such as minimally invasive approaches, have been developed in recent years. Objective: To carry out clinical and radiographic evaluations of three cavity liners after selective caries removal. Methodology: Thirty-six primary molars with deep occlusal caries lesions without pulp involvement (from ch
J. Appl. Oral Sci.. Publicado em: 03/06/2019
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6. 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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7. Effect of blisters and rims on radial hydride precipitation in fuel elements under dry storage conditions
ABSTRACT Hydrogen enters in Zry clads during fuel element life in service; when hydrogen exceeds the terminal solid solubility, circumferential hydrides are precipitated. In the presence of thermal gradients, produced for instance by oxide spallation, localized concentration of hydrides - known as blisters - can be formed. Due to the fact that zirconium hydr
Matéria (Rio J.). Publicado em: 19/07/2018
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8. Propiedades de superficies de Zr hexagonal y ZrO2 tetragonal de bajo índice a partir de cálculos DFT
ABSTRACT The use of nuclear reactor as a source of electric energy has been extended and consolidated during the second half of last century and the beginnings of XXI century. The continuity of this resource relies on the reliability and security of nuclear plants, requiring the improvement of all features related to their operation. Among them, the structur
Matéria (Rio J.). Publicado em: 19/07/2018
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9. Durasphere® EXP: a non-biodegradable agent for treatment of primary Vesico-Ureteral reflux in children
ABSTRACT Introduction: Durasphere® EXP (DEXP) is a compound of biocompatible and non--biodegradable particles of zirconium oxide covered with pyrolytic carbon. The aim of this study is to evaluate the durability of off-label use of DEXP in the treatment of primary vesicoureteral reflux in children. Materials and Methods: Patients who underwent subureteric
Int. braz j urol.. Publicado em: 2018-06
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10. Effect of addition of nano-hydroxyapatite on physico-chemical and antibiofilm properties of calcium silicate cements
ABSTRACT Objective Mineral Trioxide Aggregate (MTA) is a calcium silicate cement composed of Portland cement (PC) and bismuth oxide. Hydroxyapatite has been incorporated to enhance mechanical and biological properties of dental materials. This study evaluated physicochemical and mechanical properties and antibiofilm activity of MTA and PC associated with z
J. Appl. Oral Sci.. Publicado em: 2016-06
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11. Solubility and bacterial sealing ability of MTA and root-end filling materials
ABSTRACT Objective To evaluate solubility and sealing ability of Mineral Trioxide Aggregate (MTA) and root-end filling materials. Material and Methods The materials evaluated were: MTA, Calcium Silicate Cement with zirconium oxide (CSC/ZrO2), and zinc oxide/eugenol (ZOE). Solubility test was performed according to ANSI/ADA. The difference between initial
J. Appl. Oral Sci.. Publicado em: 2016-04
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12. P(VDF-TrFE)/ZrO2 Polymer-Composites for X-ray Shielding
Poly(vinylidene fluoride – tryfluorethylene) [P(VDF-TrFE)] copolymers were mixed with zirconia nanoparticles. The investigation was conducted with the intention to produce nanocompounds with potential to be used as protective patient shielding in radiological procedures. Polymer based nanocomposites with 1, 2, 3, 5 and 10 wt% of ZrO2 nanoparticles were pre
Mat. Res.. Publicado em: 26/02/2016