Biographical Sketch:
Ph.D., 1994, Montana State University, Bozeman M.S., 1990, University of Oregon, Eugene B.S., 1984, National Taiwan Normal University, Taipei, Taiwan 2005-pres Research Scientist, Montana State University, Bozeman 2002-2005 Research Associate, Montana State University, Bozeman 2001 National Teachers Enhancement Network (NTEN) Instructor, Bozeman, Montana
Interests:
My main research focuses on characterizing the physical and structural properties of high-strain piezo/ferroelectric single crystals such as Pb(Mg1/3Nb2/3)1-xTixO3 (PMNT), Pb(Zn1/3Nb2/3)1-xTixO3 (PZNT), Pb(In1/2Nb1/2)1-x TixO3 (PINT), and Pb(Fe1/2Nb1/2)1-x TixO3 (PFNT) for applications in the next generation of electromechanical transducers and medical imaging devices. Techniques for charaterizing the materials include polarizing light microscopy, In-situ x-ray diffraction (XRD), scanning electron microscope (SEM), dielectric permittivity spectroscopy, and electric hysteresis loop experiments etc. My recent research focuses on investigating and fabricating dense perovskite-structure proton-conducting ceramics such as Y-doped BaZrO3 and BaCeO3 with high conductivity and chemical stability under humid CO2 atmosphere for use in hydrogen separation membranes and intemediate-temperature SOFCs, steam electrolyzers, hydrogen pumps, and hydrogen sensors. Presently, coal is the most economical fossil fuel in the US, and given the vast coal resources within the US, coal will be used for power generation for many years to come. The coupling of coal gasification with SOFCs is being considered by the US Department of Energy as a highly efficient means of electricity production. Therefore, it is the goal that the materials should have high conductivity and chemical stability under humid CO2, H2S, and other contaminant atmosphere for coal syngas application in SOFCs.
Selected Publications:
“Piezoelectric response and origin in (001) Pb(Mg1/3Nb2/3)0.70Ti0.30O3 crystal,” C.-S. Tu, C.-M. Hsieh, V. Hugo Schmidt, R. R. Chien, and H. Luo, Appl. Phys. Lett. 93, 172905 (2008). “Electric-field-induced domain structures and phase transitions in PMN-PT single crystals,” V. Hugo Schmidt, R. R. Chien, and C.-S. Tu, PART 2 FIELD-INDUCED EFFECTS AND DOMAIN ENGINEERING, Handbook of Advanced Dielectric Piezoelectric and Ferroelectric Materials: Synthesis, Characterisation and Applications, edited by Z.-G. Ye, Woodhead Publishing Limited, Abington Hall, Abington, Cambridge, England, 2008. “In-situ temperature-dependent x-ray diffraction study of Ba(Zr0.8-xCexY0.2)O3-δ ceramics,” C.-S. Tu, R. R. Chien, S.-C. Lee, C.-L. Tsai, V. H. Schmidt, A. Keith, S. A. Hall, and N. P. Santorsola, Proceedings of the 32nd International Conference and Exposition on Advanced Ceramics and Composites, Daytona Beach, Florida, January 27-February 1, 2008. “Field-induced orientational percolation to a ferroelectric phase in relaxor Pb(In1/2Nb1/2)1-xTixO3,” C.-S. Tu, R. R. Chien, C.-M. Hung, V. Hugo Schmidt, F.-T. Wang, and C.-T. Tseng, Phys. Rev. B 75, 212101/1-4 (2007).
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