2019 Peter Day Award Winner

Professor Derek Sinclair

Professor Derek Sinclair

University of Sheffield


Awarded for the application of impedance spectroscopy to understanding the defect chemistry and functional properties of oxides.


About the Winner

Derek Sinclair holds a chair in Materials Chemistry at the Department of Materials Science and Engineering, University of Sheffield and is Interim Head of Department. He received BSc (Hons) Chemistry and PhD degrees from Aberdeen University and was a lecturer at the School of Materials, Leeds University (1993-94) and the Chemistry Department, Aberdeen University (1994-99) prior to moving to Sheffield in 1999. 

His research contribution includes elucidating structure-composition-property relationships in a variety of material types with particular expertise in chemical doping (and distribution) to manipulate the defect chemistry and conduction mechanisms of perovskite-based oxides for energy applications. The range of functionality has spanned from polar dielectrics, incipient ferroelectrics, thermoelectrics, high Tc superconductors to mixed ionic/electronic conductors and solid electrolytes. Device applications include; multilayer ceramic capacitors, thermoelectric generators and solid oxide fuel cells.  

An expertise of the group is to use impedance spectroscopy to characterise the electrical microstructures of heterogeneous electroceramics that contain (via dopant and/or defect segregation) core-shell intra-grain architectures and/or Schottky-barrier dominated grain boundaries/surface layers. Recent efforts (in collaboration with Dr Julian Dean at Sheffield) include simulation of impedance spectroscopy data from conventional and micro-probe contact electrodes on heterogeneous microstructures to provide a more complete understanding of current flow on both an average and local scale.  

He works with industry and a Knowledge Transfer Project with AVX Ltd (Coleraine, NI) led to a new range of BaTiO3-based Multilayer Ceramic Capacitors.

Related Links

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University of Sheffield

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