Seminerler

Prof.Dr.Ender Suvacı
Anadolu Üniversitesi

Tarihi ve Yeri : 06.05.2015-14:00, İyte Kimya Bölümü Seminer Odası , Urla, İzmir
Konusu:Innovative R&D to Develop Novel Ceramic Materials for Sustainable Growth.
Özet: Recently, R&D activities have become much more important for development of novel materials. Moreover, these novel materials are expected to result in innovative products which create value for both producers and end-users. From this perspective, R&D activities should be tailored in such a way that they can either develop a basic understanding or use the currently available knowledge that lead to technological innovation. However, these developments should not be interfering but supporting sustainability. Such R&D activities can be called as Innovative R&D which focuses on solving problems of the industry and the society while keeping sustainability in mind. Manufacturing efficiency, cost reduction, proper resource utilization, harmony between mankind and environment, resource availability and environmental impact are some of the main points that should be considered for sustainable growth. In this presentation, following three examples of Innovative R&D to develop novel ceramic materials will be discussed:

i) Development of Better Diesel Injection Systems for a Sustainable Future in which ceramic processing conditions are tailored to achieve textured ceramics that enable utilization of “hidden treasure” crystal anisotropy in materials for outstanding properties;

ii) High Stain Resistant Porcelain Stoneware Tiles where basics of materials science such as microstructure-property and sintering conditions-microstructure relations are optimized to achieve high stain resistant tiles without requiring any additional coating; and

iii) MicNo® Particle Technology which utilizes designed, platelet shaped micron particles that are composed of nano primary particles in order to solve sunscreen manufacturers’ problems.

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Dr.Hasan Şahin
University of Antwerp, Belgium

Tarihi ve Yeri : 23.02.2015-10:30, İYTE Kimya Bölümü, Seminar Odası , Urla,İzmir
Konusu:Computational Materials Engineering: from Nanoscale to Macroscale

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Dr.Aligül Büyükaksoy
University of Calgary, Canada

Tarihi ve Yeri : 21.01.2015-10:30, İYTE Kimya Bölümü, Seminar Odası , Urla,İzmir
Konusu:Towards the Elimination of Anode Related Problems in Solid Oxide Fuel Cells

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Dr.Çınar Öncel

Tarihi ve Yeri : 12.01.2015 -15:00, İYTE Kimya Bölümü, Seminer Odası , Urla,İzmir
Konusu:Performance degrading interface reaction in LSGM-based SOFC and its solution
Özet: In the first part of the talk short summaries of a couple projects were explained, such as; (i) production of Turkey’s first commercial NTC thermistor, (ii) development of single-SOFC production method, (iii) microwave assisted ceramic production, (iv) ultra smooth alumina crucible production, (v) ruby synthesis, (vi) novel coating material and method for vacuum solar collector tubes, (vii) novel heat sink for high-power LEDs ,(viii) a new shear thickening fluid for armor application and (ix) moisture absorbing thermoplastic elastomer for window seals.
In the second part or the talk the study in the title was summarized; LSGM based SOFC cells suffer from performance degradation during operation, especially when they are used with Ni-containing anodes. In this study, one of the causes for performance degradation in an LSGM-based SOFC system was investigated. XRD and electron microscopy studies coupled with EDX measurements revealed that formation of an insulating LaNiO3 layer is highly possible in such cells depending on the processing conditions. This ionic insulator phase may form a layer on the anode side of the LSGM and block oxygen ion diffusion through electrolyte. Possible solutions to hinder the formation of LaNiO3 phase were suggested in an SOFC assembly when Ni-containing anode, and lanthanum doped ceria (LDC) was used as the protective layer. In terms of interface reactions, disadvantage of samarium doped ceria (SDC) protective layer was demonstrated. Moreover, an inexpensive and feasible production method for SOFC assembly was demonstrated with a thin (1-5 µm) and dense protective layer-electrolyte coating onto the anode.

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Prof.Dr.Tahir Çağın
Texas A&M University

Tarihi ve Yeri : 22.12.2014 -14:00, İYTE Kimya Bölümü, A209 , Urla,İzmir
Konusu: Hypervelocity impact resistance of polymers and polymer nanocomposites
Özet: Dynamic response of material under large/fast mechanical impact covers their behaviour over a range of pressures up to hundreds of GPa, and temperatures to thousands of degrees. This limits the use of experimental techniques constraining the results to macro-scale. Furthermore, dynamic behaviour behind a shock front occurs at extremely short rise times in the range of nanoseconds, and length scales in the range of nanometers, posing difficulties in characterizing the material using current experimental capabilities. Some studies have investigated high strain rate phenomena in materials, such as in metals, ceramics and polymers. However, contributions of nanoscale morphologies of polymers to the high strain rate are still poorly understood.
Direct MD shock simulations of polymers and polymer composites are rare; some previous MD simulations explored the shock response of molecular crystals and chemistry. As an attempt on direct MD simulations of shock response of polymers and polymer composites, we choose phenolic resin and its carbon-nanotube (CNT); and polyurethane and its nanocomposites with graphene inclusions. We will present simulations of
the shock compression of these polymers and their composites containing carbon-nanotubes and graphene flakes. From these direct molecular-level
simulations of shock-wave generation and propagation we construct the appropriate shock-Hugoniot relations. Through this study, we determined the influence of inclusions on dynamic response of the polymers upon extreme –both mechanical and in terms of strain rate.

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Dr.Ersan Üstündağ
IOWA State University

Tarihi ve Yeri : 28.04.2014-10:30, İYTE Kimya Bölümü, Seminar Odası , Urla,İzmir
Konusu:Engineering Diffraction: The Stressful Quest for Internal Strain

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Ufuk Şentürk

Tarihi ve Yeri : 31.03.2014, İYTE Kimya Bölümü, Seminar Odası , Urla,İzmir
Konusu: Thermal and thermoelectric transport in carbon based materials

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Hâldun Sevinçli

Tarihi ve Yeri : 03.03.2014, İYTE Kimya Bölümü, Seminar Odası , Urla,İzmir
Konusu: Thermal and thermoelectric transport in carbon based materials

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Yaşar Akdoğan

Tarihi ve Yeri : 17.02.2014,İYTE Kimya Bölümü, Seminar Odası , Urla,İzmir
Konusu: Applications of EPR Spectroscopy in Structural Biology and Materials Science

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Hadi Zareie

Tarihi ve Yeri : 28.01.2014,İYTE Kimya Bölümü, Seminar Odası , Urla,İzmir
Konusu: Decorating Nanostructures for Nanodevice and Plasmonic Biosensor Applications

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