A5091395205- Glass properties and applications
- Thermal and Kinetic Analysis
- Pigment Synthesis and Properties
- Luminescence Properties of Advanced Materials
- Material Dynamics and Properties
- Recycling and utilization of industrial and municipal waste in materials production
- Nuclear materials and radiation effects
- Advanced ceramic materials synthesis
- Metallic Glasses and Amorphous Alloys
- Bauxite Residue and Utilization
- nanoparticles nucleation surface interactions
- Mineralogy and Gemology Studies
- Natural Fiber Reinforced Composites
- Agricultural and Food Sciences
- Lignin and Wood Chemistry
- Iron oxide chemistry and applications
- Epoxy Resin Curing Processes
- Inorganic Fluorides and Related Compounds
- Advanced Photocatalysis Techniques
- Zeolite Catalysis and Synthesis
- X-ray Diffraction in Crystallography
- Chemical Thermodynamics and Molecular Structure
- Clay minerals and soil interactions
- Phase-change materials and chalcogenides
- Electromagnetic wave absorption materials
Instituto Federal do Maranhão
2014-2024
Centro Científico Tecnológico - San Luis
2018
Universidade Federal do Maranhão
2011
Universidade Federal de São Carlos
2003-2010
Federal Center for Technological Education Celso Suckow da Fonseca
2009
Federal Center for Technological Education of Minas Gerais
2003-2008
In this work, Faujasite zeolite (FAU) was used as support for photoactive ZnO particles, which were prepared by in situ assembly to photocatalyst degrade emerging organic pollutants like pharmaceuticals water bodies. Physicochemical characterization techniques such PXRD, FTIR, solid-state NMR, N2 adsorption-desorption, SEM, and DRS-UV revealed good compatibility between the inorganic components, resulting intriguing surface properties chemical reactions. This material efficiently degraded...
Glass and glass-ceramics (GCs) of the CaO-SrO-B2O3-TiO2-SiO2 system are promising candidates as sealants for solid oxide fuel cells (SOFCs), mainly because possibility formation Sr2SiO4 Sr(TiO3) crystalline phases, which minimizes interfacial reaction between interconnection elements sealant. Four glass compositions this system, with different TiO2 content, were obtained. The phases formed after crystallization identified by X-ray diffraction (XRD). Combining Differential Scanning...
Crystallization kinetics parameters of a stoichiometric glass with the composition Li1.5Al0.5Ge1.5(PO4)3 were investigated by subjecting parallelepipedonal samples (3 × 3 1.5 mm) to heat treatment in differential scanning calorimeter at different heating rates (3, 5, 8 and 10 °C/min). The data analyzed using Ligero's Kissinger's methods determine activation energy (E) crystallization, which yielded, respectively, E = 415 ± 37 kJ/mol 378 19 kJ/mol. method was also employed calculate Avrami...
In this study, lithium disilicate ( LS 2 ) glass samples with different particle sizes ranging from less than 105 to 850 μm were prepared. These specimens inserted in a Pt‐Rh DSC crucible and heated 850°C at rates (ϕ = 0.5–30 K/min) identify their crystallization peaks. The activation energies for the overall E Avrami coefficient n evaluated using nonisothermal models. Specifically, was Augis–Benett model Ozawa method, Kissinger Ligero methods. As expected, coarse particles mainly...
Quantity of cubic (α-phase) and hexagonal (β-phase) KLaF<sub>4</sub> nanocrystals (NCs) tailored by doping.
PURPOSE: The association of direct resin composites with simple thermal treatments may improve the mechanical properties these materials. However, ideal temperature for heat application depends on behavior each material, such as glass transition (Tg) and initial degradation temperatures. To propose a treatment methodology, this study evaluated five commercial using differential scanning calorimetry (DSC) thermogravimetric analysis (TGA). METHODS: Photo-irradiation was achieved in cylindrical...
Several wood species from the Amazon region are used in manufacture of furniture, which leaves behind large amounts waste (slabs, sawdust, sanding dust and bark), thus causing serious environmental impacts. An interesting alternative for use these wastes is particleboards. However, few studies have focused on behavior Amazonian tree resulting production with this type material. This paper discusses potential Tauari (Couratari oblongifolia) as a raw material particleboards, using castor...
In this study, the change of height crystallization peak, (δ T ) p , and reciprocal peak temperature, 1/ were investigated as a function nucleation heat‐treatment time for two silicate glasses: (2 BaO · TiO 2 ·2 SiO — B TS lithium disilicate ( Li O LS ). Then, monolithic pieces heat‐treated in differential scanning calorimetry furnace. The results demonstrated that these glasses behave similarly with respect to i.e., decreases heating rate (φ n However, samples increases rising rates...