Design of new polar oxide materials p shiv halasyamani university of houston dmr 0652150
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Design of New Polar Oxide Materials P. Shiv Halasyamani, University of Houston, DMR 0652150 PowerPoint PPT Presentation


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Design of New Polar Oxide Materials P. Shiv Halasyamani, University of Houston, DMR 0652150. Translational Motor (Up/Down). Polar Materials exhibit a variety of technologically important properties including piezoelectricity and ferroelectricity. Rotation Motor. Seed Rod (Pt wire).

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Design of New Polar Oxide Materials P. Shiv Halasyamani, University of Houston, DMR 0652150

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Design of new polar oxide materials p shiv halasyamani university of houston dmr 0652150

Design of New Polar Oxide MaterialsP. Shiv Halasyamani, University of Houston, DMR 0652150

Translational Motor

(Up/Down)

  • Polar Materials exhibit a variety of technologically important properties including piezoelectricity and ferroelectricity.

Rotation Motor

Seed Rod

(Pt wire)

  • New polar oxides may be synthesized by utilizing cations susceptible to second-order Jahn-Teller (SOJT) distortions. These cations are d0 transition metals (Ti4+, Nb5+, W6+, etc.) and lone-pair cations (Se4+, Te4+, Sb3+, etc.).

Observation

Window

Heating Coil

  • Using this methodology, we have synthesized and characterized a variety of new piezoelectric oxides, including, Li2Ti(IO3)6, Na2Ti(IO3)6, and large single crystals of Na2TeW2O9.

Crystal Seed

Flux

Pt Crucible

Thermocouple

  • We have grown > cm size single crystals of Na2TeW2O9, a piezoelectric oxide material, through a top-seeded solution growth (TSSG) technique. A schematic of the furnace is shown to the right.

Crystal

Insulation


Design of new polar oxide materials p shiv halasyamani university of houston dmr 06521501

Design of New Polar Oxide MaterialsP. Shiv Halasyamani, University of Houston, DMR 0652150

Funding from the NSF through the Division of Materials Research supports an interdisciplinary and broad research and educational program in inorganic solid state materials chemistry.

  • Undergraduates:Antonio Pontifes* and Stephen Tam

*Under-represented group member

  • Graduate Students:Jaewook Baek (MS 2009 – Chief Chemist ExperTox), Hong Young Chang (PhD 2009 – Post-doctoral Associate at UT-Austin), Jeongho Yeon (PhD 2011), Sau Doan Nguyen (PhD 2012), Sun-woo Kim (PhD 2013)

  • Post-doctoral Associates:Dr. Jun Ho Kim (PhD 2006, MSU – DC Chemicals, Seoul, Korea), Dr. Sang-Hwan Kim (PhD 2007, Arizona State University), Dr. Weiguo Zhang (PhD 2009, Shandong University)

  • Collaborators:Prof. Alexander Norquist (Haverford College); Prof. Simon Clarke (University of Oxford); Prof. Michael Hayward (University of Oxford); Prof. Patrick Woodward (Ohio State University); Prof. Ram Seshadri (University of California – Santa Barbara); Prof. Santiago Alvarez (University of Barcelona); Prof. Matthew Rosseinsky (University of Liverpool); Prof. Yoshiyuki Inaguma (Gakushuin University)

Large Single Crystal of Na2TeW2O9


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