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Showing 1 to 20 of 23 for “"microwave processing"”.
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Microwave processing of lignocellulosic biomass for production of fuels
… this thesis applies green and energy efficient microwave technology to transform lignocellulosic biomass into solid and liquid fuels suitable for application in coal burning power plants or upgrading into transportation fuels. Current thermochemical biofuel production (e.g. pyrolysis and …
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Crystallization of Lithium Disilicate Glass Using Variable Frequency Microwave Processing
… a large number of useful glass-ceramic products. Microwave processing of materials such as glass-ceramics offers unique benefits over conventional processing techniques. Variable frequency microwave (VFM) processing is an advanced processing technique developed to overcome the hot spot and the …
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Numerical analysis of microwave processing problems using a multidomain solver approach
… of a numerical model for analysis of practical microwave processing problems. The proposed model adopts a novel multi-domain Eulerian-Lagrangian approach to the problem, defining two discrete numerical domains coupled through a set of data transfer algorithms. One of the numerical domains is …
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Calcium Phosphate Nanoparticle Synthesis and Manufacture using Microwave Processing for Biomedical Applications
… limited their clinical use.</p><p>Conventional processing produces CaP with low crystallinity and large particulates which contributes to the overall brittleness of formed products. This has largely restricted the use of synthetic CaPs to non load-bearing applications. Nanopowders can be used to …
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Role of electric field profiles in continuous microwave processing of thermal runaway materials
Microwave processing presents a relatively new heating source for a large variety of processes and materials. Depositing microwave energy volumetrically, microwave heating appears as a good alternative for sintering ceramics by decreasing the process time, offering better energy efficiency, but …
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Experimental Verification for Microwave Processing of Materials in a Single Mode Rectangular Resonant Cavity
The benefits of applying microwave energy to material processing techniques have been well documented and studied. The potential benefits over conventional oven heating include faster processing times, more uniform heating, more consistent product quality, and the possibility of precise control. …
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An improved finite-element model for simulating microwave processing of polymers and polymer-composites in a cylindrical resonant cavity
… finite-element model developed to simulate the microwave processing of polymers and polymer-matrix composites in a cylindrical resonant cavity was improved. The model consists of two submodels: the electromagnetic submodel and the heat transfer submodel. These two models are coupled together by …
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A coupled electromagnetic and heat transfer finite-element model for simulating microwave processing of composite materials in a cylindrical resonant cavity
… transfer model capable of simulating microwave processing of composite materials in a cylindrical resonant cavity was developed. The two-dimensional model simulates processing of axisymmetric material loads in cylindrical resonant cavities operating in the TM₀₁₀ mode. The model …
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High performance polymeric networks and thermoplastic blends: microwave versus thermal processing
Microwave processing of polymeric adhesives and composites offers great potential for future materials development. However, basic considerations need to be established which will allow the processing of polymeric systems, both as reactive thermosetting systems and as nonreactive thermoplastics. …
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Electromagnetic radiation calorimetry of thermoplastics, elastomers and composites systems
The application of microwave radiation for processing of glassy and semicrystalline thermoplastics, elastomeric polymers and composites was investigated. The goal of this research was to reveal the relationship between polymer structure and microwave absorptivity, and hence processability. The …
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Graphite immobilisation in glass composite materials
… of irradiated graphite prepared by microwave, conventional and sparks plasma sintering methods. Several potential glass compositions namely iron phosphate, aluminoborosilicate, calcium aluminosilicate, alkali borosilicate and obsidian were considered for the immobilisation of various …
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Simulation of Microwave Heating of Mullite Rods
Microwave processing has been studied as an alternate heating technique over conventional heating for industrial applications. Some advantages include quicker and more uniform heating. Also, microwave energy offers the advantage of localized heating and smaller-sized equipment. Many ceramics, …
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Modification, curing and flame retardation of epoxy resin networks
Microwave processing, thermoplastic modification with reactive poly(arylene ether sulfone)s and improved flame retardance of di- and higher functionality epoxy resins were investigated. The influence of curing temperature and time on morphological development and fracture behavior was also studied. …
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Fundamental experiments on the response of solutions, polymers, and modified polymeric materials to electromagnetic radiation
… of bisphenol A was sandwiched between two microwave inactive quartz plates to show selective heating of a 0.002" film. The poly(amide-imide's) dielectric storage and loss values (ɛ', ɛ") were examined as a function of temperature. The metal filled systems showed nonlinear behavior for …
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Field Simulation for the Microwave Heating of Thin Ceramic Fibers
Microwave processing of ceramics has seen a growth in research and development efforts throughout the past decade. One area of interest is the exploration of improved heating control through experiments and numerical modeling. Controlled heating may be used to counteract non-uniform heating and …
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Exploratory studies in the use of microwave radiation to assist the extraction of pollutants from various matrices.
The microwave assisted extraction of organic contaminants from heterogeneous environmental solids was investigated. The mechanisms for the interaction of a microwave field with matter, and the basic equipment used in microwave processing are presented. It was found that water content is the most …
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Production of zinc iron phosphate glasses by microwave and conventional processing methods
… with x = 0, 2.5, 5.0, 7.5, 10.0 (mol%) using microwave and conventional processing methods. The work aiming to investigate the potential use of microwave processing method for the production of zinc iron phosphate glasses. In microwave glass melting, magnetite powder coupled with microwave …
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Experimental and Theoretical Study of Microwave Heating of Thermal Runaway Materials
There is growing interest in the use of microwaves to process materials. The main application of microwave processing of materials is in heating. The most important characteristic of microwave heating is {\it volumetric} heating, which is quite different from conventional heating where the heat …
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Microwave Vacuum Carbothermic Reduction and Sulphidation of a Low Grade Nickeliferous Silicate Laterite Ore
… of nickel than current industrial techniques. Microwave Vacuum Reduction Processing (MVRP) of a nickeliferous silicate laterite ore, followed by magnetic separation was performed. The variables investigated included: processing time, microwave power, system pressure, use of argon as an inert …
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Variable Frequency Microwave Curing of Polyurethane
… there can be a number of differences between microwave and conventional materials treatment techniques [Clark et al, 1996], including enhanced reaction rates, lowered processing temperatures for some products, and selective interactions in composite systems. The primary goals of this research …
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