International Conference and Expo on Ceramics August 17-18, 2015 Chicago, USA

J.Karthik is a Doctoral Research Scholar from School of Mechanical and Building Sciences VIT University, Chennai Campus India. He has worked as an Assistant Professor in Department of Aeronautical Engineering for 2.5 years. He is one of the academic medalists in his Post Graduate Studies and published research paper in Springer Notes and various conferences. Currently he is doing his Doctoral Research in Energy Harvesting from Smart Structures at VIT University, Chennai,India.

The recent trends in electro-mechanical technology have created a demand for low power consuming and efficient technologies to cater the needs of Industries. Energy harvesting using piezoelectric devices is one of possible way to accomplish this short term goals. The application of Piezoceramic materials is unanimously increasing in areas of Energy harvesting as it has minimum weight and appealing efficiency. In this paper we are comparing Piezoceramic material as a Single crystal and Series of Piezoceramic crystals are crystal placed in a cantilever beam are tested under excitation in a Subsonic Wind tunnel. Cantilever beam when subjected to airflow vibrates in lateral axis along with Piezoceramic crystals which produces an electrical response. The electrical response are recorded in an Oscilloscope and plotted to compare their characteristics and evaluate the maximum voltage generated for a particular force of vibration. Piezoceramic material used for our research is Brass coated with Zinc which is used in electrical buzzers. Wind Tunnel which is used for exciting the crystals is a subsonic wind tunnel and maximum speed input is 1200 rpm. From this paper we can able to compare the efficiency of electrical response of Single and Series Piezoceramic crystals under excitation

Dr. P.S. Solanki has completed his Ph.D. in 2010 from Saurashtra University, Rajkot, India and he has been selected as Fast Track Young Scientist under Department of Science and Technology (DST), New Delhi, India. Presently, he is an Assistant Professor in Physics at Department of Physics, Saurashtra University, Rajkot, India. He is working in the field of ceramic manganite and multiferroic based thin film devices for spintronic based potential applications. He has published 41 research articles in internationally and nationally reputed high impact journals.

Manganites are oxide ceramics having the general chemical formula: R1-xAxMnO3 (R is the rare earth ions and A is monovalent / divalent / trivalent / tetravalent ions) with ABO3 type perovskite structure. Manganites are known to exhibit metal – insulator transition temperature (TP), ferromagnetic – paramagnetic transition temperature (TC), magnetoresistance (MR), charge ordering (CO), orbital ordering (OO), spin ordering (SO), different ground electronic – magnetic states, etc which have been understood on the basis of zener double exchange (ZDE) mechanism, Jahn – Teller (JT) effect, charge – spin – lattice – orbital couplings, etc. In this communication, we report the results of the studies on manganite based LaMnO3– / La0.7Ca0.3MnO3 / LaAlO3 (LMO / LCMO / LAO) thin film composite fabricated by low cost and vacuum free chemical solution deposition (CSD) method. Presently studied bi-layered thin film composite was studied by X-ray diffraction (XRD) measurements for structural properties which reveal that two layers of composite, i.e. LMO and LCMO, are grown in parallel epitaxial orientations. Temperature dependent current – voltage (I – V) characteristics have been investigated for transport properties suggesting the transition from normal to backward diode like characteristics of the LMO / LCMO junction. This transformation strongly depends upon an applied voltage and temperature. Electric field dependent electroresistance (ER), recorded at different temperatures, has been discussed on the basis of various phenomena such as charge injection mechanism, tunneling phenomenon, depletion region modifications and thermal processes across LMO / LCMO interface.

Pius Augustine is a Research Scholar at the Department of Physics, IIT Madras. His research work is on ‘Ferroelectric and Piezoelectric thin film development for device applications’. His research interests are relaxors in general and Pb(Mg1/3Nb2/3)O3-PbTiO3 in particular. Synthesis of pyrochlore frees PMN-PT through a modulated heating in combination with a partial covering method.

(1-x) [Pb(Mg1/3Nb2/3)O3] - x[PbTiO3] belongs to the category of relaxor ferroelectrics, is a suitable material for the piezoelectric applications and exhibit composition dependant response to external stimulus. Wide range of dielectric constants, low dielectric loss and high coupling make PMN–PT outstanding among relaxors. Synthesis of phase pure PMN-PT without pyrochlore is a challenge, which is as much an art as it is science. We could achieve device quality stoichiometric PMN-PT ceramic through novel modulated heating coupled with partial covering method. Samples prepared with and without excess PbO, showed nearly identical electrical behavior. High temperature stabilization was administered to the samples in two different ways and was found to be successful in realizing stoichiometric and device quality ceramic. Phase formation and electrical analysis attested the utility of the ceramic and the method of preparation. The unusual PDF-electric behavior of the samples may be attributed to quality of grinding, stabilization heating and big grains with limited grain boundary free of PbO inclusion. In my presentation, I will be giving a comparative study of piezoelectric, dielectric and ferroelectric behavior of two sets of samples prepared by administering stabilization heating in two different ways. XRD, Raman, XPS and SEM analysis of the composition will be outlined along with PDF-electric studies. PLD grown thin films on bare and La0.5Sr0.5CoO3 (LSCO) deposited platinised silicon substrate and topographic studies using AFM will also be presented. We are trying to develop large area PMN-PT thin films for under water sensor applications.

Marjan Mohammad Ali Zadeh received her BS and MS in Material Engineering, ceramic branch, from Shahrekord University (Shahrekord, Iran) and Material and Energy Research Center (MERC, Karaj, Iran) in 2009 and 2013, respectively. She has worked as a Researcher at Material and Energy Research Center (MERC) for 3 years. Through these years, she has worked with Dr. Kianpour-rad on projects in connection with nano materials, polymers and ceramics. Her MS thesis was on synthesis of mullite nanofibers via electrospinning method and investigation the polymer roles in their morphology. Fortunately she has defended her thesis with A grade. She has published 6 scientific papers in the world journals and international and national conference proceedings. Currently she is working in a CNG- Cylinder maker factory (Pars M.C.S Company) as head of laboratory.

In this work, electrospinning was used for synthesis of fiber with small diameter and high homogeneity. Precursor sol was prepared from aluminum isopropoxide (AIP), hydrated aluminum nitrate (AN) as the alumina sources and tetraethylorthosilicate (TEOS) as the silicon source, and then mixed with polymeric solution, which contains different proportion of polyvinyl alcohol (PVA, as the template). Then synthesized nanofibers sintered at different temperatures in calcination and microwave furnace. The details of crystal development, microstructure and thermal decomposition behavior of the electrospun nanofibers were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). According to the results, sintered samples via microwave furnace had higher thermal stability and the crystallization temperature was lower than those sintered in calcination furnace.

Zviad Kovziridze is the Head of the Department of the technology of composite materials and articles of Georgian Technical University; Scientific supervisor of the center of bio-nanoceramics and nanocomposites material science of GTU. He is the Member of the Council of International Ceramists Federation (ICF); Member of the Council of European ceramists’ Association (ECERS). He is also President of Georgian Ceramic Association and Editor-in-chief of journal “Ceramic” of the Georgian Ceramists Association, “Journal of Ceramic Science and Technology”. He has 168 publications in repute journals, among them 4 textbook, 7 monograph and 13 author’s certificates.

Zviad Kovziridze is the Head of the Department of the technology of composite materials and articles of Georgian Technical University; Scientific supervisor of the center of bio-nanoceramics and nanocomposites material science of GTU. He is the Member of the Council of International Ceramists Federation (ICF); Member of the Council of European ceramists’ Association (ECERS). He is also President of Georgian Ceramic Association and Editor-in-chief of journal “Ceramic” of the Georgian Ceramists Association, “Journal of Ceramic Science and Technology”. He has 168 publications in repute journals, among them 4 textbook, 7 monograph and 13 author’s certificates.