A5053538925- Advanced ceramic materials synthesis
- Advanced materials and composites
- Agricultural and Food Sciences
- Recycling and utilization of industrial and municipal waste in materials production
- Aluminum Alloys Composites Properties
- Innovations in Concrete and Construction Materials
- Advanced Photocatalysis Techniques
- Materials Engineering and Processing
- Ferroelectric and Piezoelectric Materials
- Microwave Dielectric Ceramics Synthesis
- Pigment Synthesis and Properties
- Horticultural and Viticultural Research
- Powder Metallurgy Techniques and Materials
- Additive Manufacturing and 3D Printing Technologies
- Recycling and Waste Management Techniques
- Academic Research in Diverse Fields
- TiO2 Photocatalysis and Solar Cells
- Injection Molding Process and Properties
- Clay minerals and soil interactions
- Polymer Foaming and Composites
- Electrophoretic Deposition in Materials Science
- High Entropy Alloys Studies
- Tribology and Wear Analysis
- Grouting, Rheology, and Soil Mechanics
- Building materials and conservation
Universidade Federal de Santa Catarina
2015-2024
Universidade do Vale do Rio dos Sinos
2021-2022
University of California, Davis
2019
Eletrobras (Brazil)
2017
Universidade Sociedade Educacional de Santa Catarina
2006-2008
Serviço Nacional de Aprendizagem Comercial
2007
Instituto de Cerámica y Vidrio
2007
A detailed study of a novel synthesis via colloidal sol–gel route for obtaining nanoparticulate Nb 2 O 5 was performed. Parameters such as temperature and H + :Nb 5+ :H molar ratios were controlled in order to determine the best conditions synthesis. Moreover, particle size distribution, zeta potential, structure by X‐ray diffraction, photocatalytic activity particulate sols also evaluated. The obtained results indicate that is good alternative either stable sol or nanosized powder....
Using rheological parameters of ceramic suspensions, it is possible to taylor the structure foams produced by replica. This method consists in impregnation a polymeric flexible template (polyurethane foam) with suspension (slurry) containing appropriate additives, followed burning out organic compounds and additives sintering structure. In this work, were replica from Al 2 O 3 3% Y -ZrO . Rheological suspensions investigated improve mechanical performance final structures. Different types...
This paper deals with the rheological characterization of agar and foaming surfactant‐containing suspensions for obtaining stoichiometric cordierite samples tailored open macroporosity their through density microstructural studies. The influence processing parameters solid loading (20, 30, 45 vol%), slip temperature (65°C, 45°C, 40°C), agar/surfactant ratio (10.2, 8.0, 5.6) on obtained bodies is discussed. Open Porosity (up to 76 vol%) average cell size were found be strongly dependent...
This work reports the processing steps of Al 2 O 3 (1–5 vol%) nanoparticulate ( d V.50 = 13 nm) LZS glass–ceramic matrix (19.58Li O·11.10ZrO ·69.32SiO , mol%, v.50 3.5 μm) composites for production multilayered materials with thermal expansion gradients obtained by tape casting. Suspensions were prepared in water to solids contents ranging from 40 47 vol% using ammonium polyacrylate as a deflocculant, and an acrylic copolymer polyvinyl alcohol binders. Optimum performance was achieved...
Abstract An increase in hardness with reducing grain sizes is commonly observed oxide ceramics particular for below 100 nm. The inverse behavior, meaning a decrease critically small size, may also exist consistently observations metal alloys, but the causing mechanisms are still under debate. Here we report direct thermodynamic data on boundary energies as function of size that suggest relation intimately related to size‐induced excess energies. Microcalorimetry combined nano and...
Abstract This work describes the role of manganese (Mn) as a sintering aid for magnesium aluminate (MgAl 2 O 4 ) nanoparticles. Mn‐doped MgAl nanoparticles, synthesized by coprecipitation method, showed increased surface area when contrasted to undoped . Fast firing compacted‐doped nanoparticles achieved high degree densification at temperatures low 1100°C with very moderate grain growth, resulting in average sizes nanoscale (~60 nm). Differential scanning calorimetry was used quantify...
In this study, powder technology was used to obtain Fe-SiC composites in which SiC particles act as precursors generate a large amount of turbostratic graphite dispersed the composite matrix. The selection alloy composition studied employing Thermo-Calc® software temperature and range for stabilization phase iron with high yield. extracted 2D were mineral oil order evaluate potential these lubricating additive. structure morphology examined by Raman spectroscopy transmission electron...
An original discrete element model for coupling thermo-mechanics with sintering is presented to disclose the thermo-micromechanical behavior of particulate systems and their densification process under rapid firing. This paper focuses on numerical formulation application fast firing Al 2 O 3 , including its verification literature. Particular emphasis given evolution thermal gradients over conditions sample length, zeroing in shrinkage characteristic phenomena. Relationships between defects,...
Large-format ceramic tiles are prone to dimensional variation that is detected as warping, which often due the appearance of a defect called delayed curvature. This problem associated with residual stresses generated inside these large pieces via formation liquid phase during sintering. The present study aims correlate influence interaction between raw materials and production process parameters on absorption water variation. was achieved by developing an alternative control procedure...