A5029968629- Microwave and Dielectric Measurement Techniques
- Microwave Engineering and Waveguides
- Microwave-Assisted Synthesis and Applications
- Electromagnetic Compatibility and Noise Suppression
- Food Drying and Modeling
- Synthesis and properties of polymers
- Magnetic and Electromagnetic Effects
- Microwave Dielectric Ceramics Synthesis
- Soil Mechanics and Vehicle Dynamics
- Materials Engineering and Processing
- Electromagnetic wave absorption materials
- Conducting polymers and applications
- Electromagnetic Compatibility and Measurements
- Antenna Design and Analysis
- Advanced Fiber Optic Sensors
- Injection Molding Process and Properties
- Additive Manufacturing and 3D Printing Technologies
- Advanced Surface Polishing Techniques
- Aerosol Filtration and Electrostatic Precipitation
- RFID technology advancements
- Millimeter-Wave Propagation and Modeling
- Energy Harvesting in Wireless Networks
- Advanced Antenna and Metasurface Technologies
- Railway Engineering and Dynamics
Universidad Politécnica de Cartagena
2020-2023
Prefeitura Municipal de Campos dos Goytacazes
2021
Permittivity of materials is utmost importance for microwave applicators’ design and to predict high-frequency dielectric heating materials. In the case aromatic plant biomass, however, there are few data that help researchers applicators microwave-assisted extraction. this work, permittivity cypress rockrose biomass samples were measured versus temperature, density, moisture content. A resonant technique based on a coaxial bi-reentrant cavity was employed obtain complex as function those...
AbstractFor a large variety of food products, the moisture content can be indirectly determined by measuring their dielectric properties. In case coffee, permittivity knowledge applied to determine or for online meters in automatic control coffee dryers. However, there is little data on properties roasted ground near 2.45 GHz ISM band. this contribution, was measured versus temperature, bulk density, and content. A resonant technique based coaxial microwave cavity employed obtain complex as...
Quinoa is a nutrient-rich pseudocereal that gaining popularity in European countries since it gluten-free and an interesting source of fat, proteins, minerals, amino acids. However, up to date, the electric permittivity quinoa seeds has not been measured and, therefore, this hampers possibility designing optimized recipes for its microwave processing. In work, both raw boiled around 2.45 GHz at several conditions temperature, moisture content, bulk density. The grain kernel also estimated...
Fabric permittivity is critical for the manufacturing of wearable sensors and antennas as well predicting how fabrics interact with electromagnetic fields. Engineers should also understand changes under different temperatures, densities, moisture content values, or when several are mixed in aggregates, designing future applications such microwave dryers. The cotton, polyester, polyamide fabric aggregates investigated this paper a wide range compositions, levels, density temperature...
Metallic stirrers are commonly used in mode-stirred reverberation chambers but less common microwave ovens, because the use of a metallic axis creates coaxial port cavity wall where is introduced, which may result significant leakage levels. However, due to electromagnetic, mechanical, temperature, or chemical requirements, axes must be some cases. In this paper, we present high power filter that enables applications. The employs two-port cavities analyzed determine their design parameters....
Many efforts are being made to find innovative ways of recycling rubber from end-of-life tires (ELTs), also called ground tire Rubber (GTR). Recycling through devulcanization allows the reintroduction back into manufacturing industry. Such a process requires providing enough energy break sulfur links, while preventing damage polymeric chain. Microwave heating is controllable, efficient, and it does not rely on conventional mechanisms (conduction, convection) which may involve high losses,...
Microwave dielectric heating has been demonstrated to have substantial advantages over traditional procedures. Nonetheless, the sample temperature must be continuously monitored during microwave irradiation procedure. Despite fact that various sensors exist directly obtain temperature, this is still an issue for microwave-heating processes. The typically measured with use of a calibrated external sensor capable monitoring surface container from predetermined distance. significant limits...
Devulcanizing ground-tire rubber (GTR) properly requires the removal of sulphur linkages that crosslink polymer. The volatile compounds (VSCs) released during process must be extracted from reactor to avoid any chemical recombination, and gas concentrations conveniently sensed extraction, along with a thermal sensoring payload, can used monitor whole devulcanization process. In this contribution, modified conventional microwave oven was devulcanize GTR. microwave-processed GTR evaluated by...
Devulcanizing ground-tire rubber (GTR) properly requires the removal of sulphur linkages that crosslink polymer. The volatile compounds (VSCs) released during process must be extracted from reactor to avoid any chemical recombination, and gas concentrations conveniently sensed extraction, along with a thermal sensoring payload, can used monitor whole devulcanization process. In this contribution, modified conventional microwave oven was devulcanize GTR. microwave-processed GTR evaluated by...
The main problems of the traditional foundry dewaxing processes in fine arts workshops are emission gases, loss 80% wax, high electrical consumption, and risks for operators. introduction microwave technology ceramic shell molds allows to minimize some these problems, although use electromagnetic susceptors that capture radiated energy transform it into heat is required. This article describes different tests using TiO2 graphite as susceptors. results obtained show this technique viable,...