A New Colossal Dielectric Constant Material and its Potential Applications

Prof Yun Liu, Head of the Functional Materials Research Group
Australian National University
Nov 21, 2013.

Presentation Summary

  • Materials: (In,Nb) co-doped rutile TiO2, cheap, light, non-toxic and abundant
  • Polarisation mechanism: electron-pinned defect dipoles
  • Materials property: dielectric constant-over 10000 and dielectric loss -lower than 5% over 400oC temperature span. Temperature- and frequency- independence.
  • Potential applications:-
- High capacitance capacitors for electric system
- Energy storage

Speaker Biography (Yun Liu)

Yun Liu is an Australian Research Council Future Fellow and an Associate Professor, leading a Functional Materials Research Group at the Australian National University (ANU). She received her PhD degree in 1997, worked in the National Institute of Advanced Industrial Science and Technology, Japan in 1998-2001, and then move to the ANU since 2001.
She has been working in the field of functional materials and smart devices. Her main research direction is to explore the correlation between local structure/defects and property of functional materials though diffraction techniques, and then to develop the new materials and associate devices for practical applications. This includes giant dielectric constant materials for charge/energy storage, lead-free ferroelectric and piezoelectric materials for uses in sensors, actuators, transducers and energy harvesting devices.

Company Profile (Australian National University)

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