A5065325423- Microwave-Assisted Synthesis and Applications
- Advanced ceramic materials synthesis
- Ferroelectric and Piezoelectric Materials
- ICT Impact and Policies
- Quantum Dots Synthesis And Properties
- Advanced Photocatalysis Techniques
- Microwave Dielectric Ceramics Synthesis
- Dielectric materials and actuators
- Gas Sensing Nanomaterials and Sensors
- Advanced Sensor and Energy Harvesting Materials
- Academic Writing and Publishing
- Science, Technology, and Education in Latin America
- Microwave Engineering and Waveguides
- Biomedical and Engineering Education
- Calcium Carbonate Crystallization and Inhibition
- Big Data and Business Intelligence
- Energy Harvesting in Wireless Networks
- Nuclear materials and radiation effects
- Electrical and Thermal Properties of Materials
- Material Selection and Properties
- Metallurgical Processes and Thermodynamics
- ICT in Developing Communities
- Materials Engineering and Processing
- AI in Service Interactions
- Engineering Education and Technology
Universidad Autónoma de Nuevo León
2016-2025
Multilayer ceramic capacitors (MLCC) are essential components for determining the reliability of electronic in terms time to failure. It is known that MLCCs depends on their composition, processing, and operating conditions. In this present work, we analyzed lifetime three similar X7R type based BaTiO₃ by conducting High Accelerated Life Tests (HALT) at temperatures up 200 °C 400 V 600 V. The results were adjusted an Arrhenius equation, which a function activation energy (Ea) voltage stress...
Dielectric and thermal properties of polyvinyl butyral (PVB) were studied in this work, using dynamic electrical analysis (DEA) at frequencies from 100 Hz to 1 MHz temperatures 293 K 473 K. Two relaxation processes investigated: glass transition interfacial polarization. Above the temperature (~343 K), polarization dominates conductive behavior butyral. The framework complex electric modulus was used obtain information about viscoelastic analyzed through mechanical (DMA), where only...
Results on the synthesis of ZnS nanoparticles from ZnSO 4 and Zn(CH 3 COO) 2 as precursors under microwave (MW) heating conditions are reported. An MW oven (1650 W) operating at 60 100% nominal power in periods for s was employed. The obtained dispersions were analyzed by UV-Vis spectroscopy, X-ray diffraction, photoluminescence, transmission electron microscopy. results show that dispersion concentration depends mainly applied power, whereas luminescent properties related with employed...
Dielectric approaches for estimating microwave heating of ceramics and polymers assuming that resistive effects are small enough to be neglected have been applied quite often. However, these not valid semiconductors. Permittivity resistivity very sensitive chemical composition; therefore it is difficult extrapolate properties from similar materials as can done with thermal properties. The objective this work estimate the dielectric contributions during heating, solving electromagnetic heat...
Perlite is an igneous mineral composed by silicon, aluminum, oxygen and water. It can be expanded heating it upat temperatures above 870 °C, then becomes plastic, the steam formed inside pressures out of mineral.Maximum expansion possible if particles are heated up quickly, since degree strongly dependson remaining water in at time that they reach temperature where become plastic. Thetypical process consist pouring rotary kilns operated with natural gas, but proposed inthis research quickly...
Nanoparticles of SiC have been synthesized employing a sol-gel based method to prepare precursor on pheniltrimethoxysilane (PTMS), followed by microwave pyrolysis under N2 atmosphere, aimed produce the cubic polytype 3C-SiC, known as β-SiC, separated hexagonal or rhombohedral polytypes (α-SiC). Experiments at 2.45 GHz and 5.8 were conducted different conditions, multimode single mode, susceptor configurations, confirming presence β-SiC means FTIR, Transmission Electron Microscopy electron...
Synthesized PbMoO4 from H2MoO4 and Pb(NO3)2 with microwaves was compared, in terms of its photocatalytic activity as catalyzer for decomposing rhodamine B (RhB), against samples prepared by hydrothermal sonochemical methods the same precursors. Microwave synthesis lasted 20 minutes; hydrothermal, 10 minutes method, 1 hour. X-rays diffraction patterns show that these three routes is compounded phase. It found microwave synthesized particles are rounder, an intermediate size (250 nm), compared...
Barium titanate (BaTiO3) doped with rare-earth elements (REE) is used as dielectric in the manufacture of multilayer ceramic capacitors (MLCCs). The most common REE oxide employed dopant for this application Y2O3. behavior Y3+ BaTiO3 structure depends on its concentration and sintering conditions, among other factors, which can induce formation secondary phases that are a potential cause detriment to electrical properties BaTiO3. purpose work perform phase characterization different...
Our society is consuming energy figures which are so large that sometimes they become meaningless when mentioned; electricity alone in 2012 was 20,900 TWH (IEA World energy statistics), 68% from fossil fuels, 11% nuclear and 21% ‘renewable’; the that comes resources not significantly depleted by their use, such as sunlight, wind, rain, tides, waves geothermal heat. It estimated consumed the buildings (residential commercial end users) accounts for 20.1% of this total ([International...
A comparison of microwave and conventional, in an electric resistance furnace, sintered layers dielectric base barium titanate (BaTiO3) the kind employed for multilayer ceramic capacitors (MLCC) was performed. Two kinds samples were used each processing method; alone without electrodes, green MLCC with electrodes interdigitated. Samples exposed to microwaves 20 minutes heated up 1050°C 1150°C sintering a crucible graphite that acted as reduction agent susceptor. Conventional performed same...