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Bletchley, United Kingdom

Mucklejohn S.A.,Ceravision Ltd
Journal of Physics D: Applied Physics | Year: 2011

Molecular constants and dissociation energies reported in the literature, supplemented by some estimated parameters, have been used to derive the molar heat capacities, molar entropies and molar standard enthalpies of formation for the lanthanide monohalides, LnX〈g〉, for Ln = Ba, La to Lu and X = F, Cl, Br, I. © 2011 IOP Publishing Ltd.

Han Q.,Fudan University | Ye Z.,Jiangsu University | Zhao J.,Jiangsu University | Lister G.,Ceravision Ltd | Zhang S.,Fudan University
Chemosphere | Year: 2013

A study of dimethylamine photo-dissociation in the gas phase has been conducted using UV radiation delivered from a KrBr* excilamp, driven by a sinusoidal electronic control gear with maximum emission at wavelength of 207nm. The electrical input power and radiant power of the lamp were measured to determine their effects on the degradation. The influence of flow velocity and initial concentration of dimethylamine were also examined. In order to evaluate the photo-dissociation process comprehensively, several parameters were investigated, including removal efficiency, energy yield, carbon balance and CO2 selectivity. It is shown that the removal efficiency increases with enhanced input power and decreased gas flow rate. A high removal efficiency of 68% is achieved for lamp power 102W and flow velocity 15m3h-1. The optimum dimethylamine initial concentration is around 3520mgm-3, for which the energy yield reaches up to 442gkWh-1 when the input power is 65W. In addition, two chain compounds (1,3-bis-dimethylamino-2-propanol; 3-penten-2-one, 4-amino) and three ring organic matters (1-azetidinecarboxaldehyde, 2,2,4,4-tetramethyl; N-m-tolyl-succinamic acid; p-acetoacetanisidide), were identified by GC-MS as secondary products, in order to demonstrate the pathways of the dimethylamine degradation. © 2013 Elsevier Ltd.

Kroupa A.,Academy of Sciences of the Czech Republic | Andersson D.,Swerea IVF | Hoo N.,ITRI Ltd | Pearce J.,ITRI Ltd | And 3 more authors.
Journal of Materials Engineering and Performance | Year: 2012

The substitution of lead in the electronics industry is one of the key issues in the current drive towards ecological manufacturing. Legislation has already banned the use of lead in solders for mainstream applications (T M≈220 °C), but the use of lead in the solders for high-temperature applications (>85% lead, T M≈250-350 °C) is still exempt in RoHS2. The search for proper substitutes has been ongoing among solder manufacturers only for a decade without finding a viable low cost alternative and is the subject of intensive research. This article tries to map the current situation in the field of high-temperature lead-free soldering, presenting a short review of current legislation, requirements for substitute alloys, and finally it describes some existing solutions both in the field of promising new materials and new technologies. Currently, there is no drop-in replacement for lead-containing solders and therefore both the new materials and the new technologies may be viable solutions for production of reliable lead-free joints for high-temperature applications. © ASM International.

Mucklejohn S.A.,Ceravision Ltd
Journal of Light and Visual Environment | Year: 2013

Ionisation potentials reported in the literature and estimated molecular constants have been used to derive the heat capacities, entropies and standard enthalpies of formation for the lanthanide monohalide gaseous cations, LnX +, Ln=Ba &La to Lu and X=F, Cl, Br, I.

Ceravision Ltd | Date: 2014-03-21

Apparatus and components for microwave powered lamps; high frequency power supplies; power control circuits, electronics and devices; control circuits for magnetrons; current and voltage regulators; high voltage converters; oscillators; transformers; rectifiers; electric resistances; capacitors; diodes; magnetrons; microwave generators; solid state microwave power amplifiers; computer heat sinks; heat sinks for magnetrons; computer cooling pads; internal cooling fans; matching circuits; coaxial cables; bandpass filters; tuning filters; antennas; waveguides; resonators; Faraday cages; crucibles; microprocessors and software for controlling microwave powered lamps; lighting ballasts; optical lamps; projection apparatus. Medical apparatus and instruments; probes for medical purposes; quartz lamps for medical purposes; surgical apparatus and instruments; ultraviolet ray lamps for medical purposes. Architectural lamps; architectural burners; entertainment lamps; entertainment burners; electric lamps; electrodeless lamp; electrodeless burner; horticultural lamps; horticultural burners; laboratory burners; laboratory lamps; high bay lighting systems; high bay luminaires; high-efficiency plasma lamps; lamp casings; lamp reflectors; lamps, burners for lamps; operating theatre lighting; lamps (electric); lamps for directional signals of automobiles; light bulbs; light bulbs electric; light bulbs for directional signals for vehicles; light diffusers; lighting apparatus and installations; lighting apparatus for vehicles; lighting installations for air vehicles; driving lights; lights for automobiles; lights for vehicles; microwave-powered lamp; microwave-powered burner; projector lamps; lamp reflectors; vehicle reflectors; radio-frequency powered lamps; radio-frequency powered burners; safety lamps; searchlights; ultraviolet ray lamps, not for medical purposes; vehicle headlights; lighting apparatus for vehicles; lights for vehicles; water filtering apparatus; water purification installations; water purifying apparatus and machines; sports lighting; sports stadia lighting; amenity lighting.

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