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Professor Bell's research at Leeds has focussed on the modelling, fabrication, characterization and applications of novel ferroelectric materials in ceramic, composite, thin film and single crystal forms.
A notable achievement has been the development of bismuth ferrite based ceramics as high temperature piezoelectric materials, for which his group has been awarded 2 patents. Initially motivated by the need for piezoelectric components to operate at temperatures up to 450°C in commercial aero-engines, the material has now been proven in a number of applications, including aerospace, automotive and process engineering. Ionix Advanced Technologies Ltd, founded in 2011 as a spin-out from the University with Prof Bell as Chief Scientific Officer, now employs 12 staff and is producing high temperature ultrasound transducers based on the new materials. Prof Bell's group is currently exploring the same material system as a multiferroic material with enhanced coupling between magnetic and ferroelectric order parameters and potential applications in sensing and data storage.
His group's current research focuses on two areas: (i) novel piezoelectric materials for sonar devices, funded by both Thales plc and DSTL, looking at new high activity ceramics and single crystals, including lead-free variants and (ii) the development of functional materials which are tailored for deployment by additive manufacturing processes, such as ink-jet printing.
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