Microwave heating resource

Microwave heating and Process of Materials Seminar 2011 It was an action packed programme with key note and student presentations, followed by Q&A sessions by the review panel, concluding with an awarding ceremony for the best presentation prize.

The presentations were first class and generated lots of discussion from the attendees at the event. It provided a unique speaking opportunity to young engineers who have limited experience in presenting at a professional seminar in a supportive environment.

There is also a seminar digest available for download, containing the following presentations and abstracts.

 

 

Large industrial microwave used to cook bacon

Microwave generator technology for the 21st century

Microwave processing is an expensive form of power used to deliver transformational economics enabling butter tempering, bacon cooking, rubber vulcanisation and artificial diamonds. 


 

 

Photograph of a microwave microscope system

Measurement of the microwave permittivity of mineral specimens at the micron scale

We describe a Near-field Scanning Microwave Microscope (NSMM) which images the complex permittivity of materials at a micron scales, and also allows traceable measurements at particular locations to be made at an increased level of precision.


ThruVision Systems Ltd 250GHz Imagery system showing different imaging techniques

Detectors, sources and optics for materials processing from 100-500Ghz

Until recently, the lack of the basic building blocks (sources, detectors optical feeds and measurement tools) in the so called ‘Terahertz Gap’ has severely limited any thought of heating of materials or industrial processing except with the use of high power Gyrotrons. These can output 10 100’s of kilowatts in the millimetre wave region but they are complex and highly specialised.


Graph showing results for experiment looking at the Effect of Heating Rate on The Dielectric Properties of Wood

Microwave processing for forestry waste

In the biomass action plan of 2005, the EU sets a target of 150 million tonnes of oil equivalent to be derived from biomass by 2020 to reduce dependence on foreign energy and to help meet obligations under the Kyoto agreement.


 

 

Photograph of photoelectrodes

Microwave-assisted low temperature fabrication of nanostructured α-Fe2O3 electrodes for solar-driven hydrogen generation

Finding a renewable source of energy to replace fossil fuels has been the focus of many research activities around the world. Generation of hydrogen through phototelectrochemcial (PEC) water splitting, also known as solar-driven water splitting is one of the most promising alternatives for the production of hydrogen as a fuel.


Photograph of resonator for microcapillaries

Efficient microwave heating and dielectric characterisation of microfluidic systems

This paper presents a 2.45 GHz microwave cavity resonator with the novel dual function of both sensitive dielectric characterisation and directed, volumetric heating of fluids in a microfluidic chip. This method has a higher efficiency, higher rate of heating and is more controllable than previous microfluidic microwave heating methods.


Oil contaminated drill cuttings are rock fragments impregnated with oil

Microwave processing of oil contaminated drill cuttings: an alternative treatment to offshore drilling waste

Offshore drilling yields a variety of oily wastes, which need to be treated and disposed of. Oil contaminated drill cuttings are rock fragments impregnated with oil and can be considered to have three distinct main phases the rock, the oil and water.


Drawing of Tesla's wireless transmission of power in the 1890s

Application of high-frequency resonant transformers in the transmission of power

The application of high-frequency resonant transformers in the transmission of power has been described in the literature, but as yet there has been no direct effort to quantify and map the near-field of such electrically small RF structures. This curiosity lead research investigated the feasibility to distribute power using quasi-static fields.


Photograph of multiphase material holding water, material and oil

Microwave-assisted recovery of hydrocarbons from oil-bearing rocks

The depletion of conventional fossil-fuels and the increase in crude oil prices has resulted in the search for alternative energy sources. Civilisation’s reliance on petroleum and its by-products is so embedded that transforming world economies to renewable energy derived systems is still a distant prospect.


 

 

Basis of design for the reactor to be used on POLARIS

New directions in the microwave synthesis of inorganic materials; complex carbides and time-resolved reaction probes

Conventional synthesis of solid state materials is time and energy intensive, often requiring extremely high temperatures and complicated experimental procedures. Microwave (MW) synthesis is emerging as a viable alternative.


Photograph of open-ended single mode resonant applicator integrated with placement machine

Open-ended single mode resonant applicator for microelectronics packaging application

The basic design of the open-ended single mode resonant applicator as shown in Figure 1 (see abstract for figure) creates a resonance within the dielectric block, whilst the fields in the air filled section are below cutoff and therefore evanescent.