Kurum Yazarı "Suvacı, Ender" Malzeme Bilimi ve Mühendisliği Bölümü İçin Listeleme
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Anisotropic mechanical and functional properties of graphene-based alumina matrix nanocomposites
Çelik, Yasemin; Çelik, A.; Flahaut, Emmanuel; Suvacı, Ender (Elsevier Sci LTD, 2016)Graphene platelets (GPLs) containing Al2O3 nanocomposites, which exhibit anisotropic microstructure, have been prepared by spark plasma sintering (SPS), and effects of this anisotropy on mechanical, electrical and thermal ... -
Anisotropic sintering shrinkage in alumina ceramics containing oriented platelets
Özer, I. Ozgür; Suvacı, Ender; Karademir, B.; Missiaen, J. M.; Carry, C. P.; Bouvard, D. (Wiley, 2006)The effect of oriented alpha-Al2O3 platelets on densification and shrinkage behavior of tape-cast alpha-Al2O3 during solid-state sintering was studied using dilatometric sintering shrinkage experiments and microstructural ... -
Antimicrobial activity of designed undoped and doped MicNo-ZnO particles
Demirel, Rasime; Suvacı, Ender; Şahin, İsmail; Dağ, Sevinc; Kılıç, Volkan (Elsevier Science BV, 2018)The research objective of the present study was to evaluate antimicrobial activity of ZnO powder systems in different size, shape and array platelet forms with undoped and doped Ag at different concentrations. In particular, ... -
Application of Homogeneously Precipitated Nanosized Fe-Doped Alumina Powders to Carbon Nanotube Growth
Çelik, Yasemin; Suvacı, Ender; Flahaut, Emmanuel; Weibel, Alicia; Peigney, Alain (Wiley, 2010)Homogeneous precipitation of hydroxides was investigated as an alternative method to synthesize Fe-doped aluminum oxide (alpha-Al2-2xFe2xO3) particles over which carbon nanotubes (CNTs) were grown via a catalytic chemical ... -
Chemical stability of KNbO3, NaNbO3, and K0.5Na0.5NbO3 in aqueous medium
Özmen, Özcan; Özsoy-Keskinbora, Çiğdem; Suvacı, Ender (Wiley, 2018)In recent years, potassium sodium niobate (K0.5Na0.5NbO3, KNN) has become popular and promising among perovskite lead-free piezoceramic systems. In this study, the chemical stability of KNN powders in aqueous medium was ... -
A comparative study on few-layer graphene production by exfoliation of different starting materials in a low boiling point solvent
Çelik, Yasemin; Flahaut, Emmanuel; Suvacı, Ender (Elsevier Science BV, 2017)Three different graphite-based powders (expandable graphite and two different nano-graphite powders) were investigated as starting materials for an effective liquid phase exfoliation process in isopropyl alcohol (IPA). The ... -
Computational analysis on cymbal transducer
Özgür, AE; Doğan, A; Suvacı, Ender; Newnham, RE (Taylor & Francis Inc, 2003)Finite Element Analysis in collaboration with experimental studies was conducted to investigate the effects of dimensional parameters on the performance of the cymbal transducer. ANSYS 5.5 FEM code was used for computational ... -
Deaging of heat-treated iron-doped lead zirconate titanate ceramics
Granzow, T.; Suvacı, Ender; Kungl, H.; Hoffmann, M. J. (Amer Inst Physics, 2006)Doping strongly influences the properties of ferroelectric perovskite materials. One striking difference between donor- and acceptor-doped materials is the transition from "soft" to "hard" ferroelectric behavior. The ... -
Dopant effects on sintering and microstructure development in zinc oxide-based electroceramics
Özdemir, N; Suvacı, Ender (Trans Tech Publications LTD, 2004)In this study, effects of dopants including Bi2O3, Ta2O5, Sb2O3 on sintering and microstructure development in ZnO-based electroceramics were investigated. Bi2O3 addition to ZnO enhances the densification process and results ... -
Effect of Precursor Type on Zinc Oxide Formation and Morphology Development during Hydrothermal Synthesis
Semiconducting metal oxide sensors have been widely studied due to their small dimensions, low cost and low power consumption. ZnO is a potential material for gas sensor applications because of its high piezoelectric ... -
Effects of TiO2, ZnO, and Fe3O4 nanofillers on rheological behavior, microstructure, and reaction kinetics of rigid polyurethane foams
Akkoyun, Meral; Suvacı, Ender (Wiley, 2016)Effects of different types and shapes of titanium dioxide, zinc oxide, and magnetite nanofillers on the rheological behavior of polyol/nanofiller suspensions, on the rigid polyurethane foam formation reaction, and hence ... -
Electrophoretic deposition of nano-sized BaTiO3
Doğan, Aydın; Günkaya, Göktuğ; Suvacı, Ender; Niederberger, Markus (Springer, 2006)In this study, a non-aqueous method in a simple one pot reaction process was employed to synthesize nano-sized BaTiO3 particles and then electrophoretic deposition technique was employed for thin film coatings. In the first ... -
Electrophoretic deposition of nanocrystalline BaTiO3 in ethanol medium
Doğan, Aydın; Günkaya, Göktuğ; Suvacı, Ender; Niederberger, Markus (Trans Tech Publications LTD, 2006)Electrophoretic deposition technique is a versatile coating method. With this method not only flat surfaces but also curved or rough surfaces can be coated in various thicknesses. In this study, BaTiO3 nanocrystals were ... -
Electrophoretic deposition of ZnO
Doğan, Aydın; Suvacı, Ender; Günkaya, Göktuğ; Uzgur, Erman (Trans Tech Publications LTD, 2004)Electrophoretic phonemenon is applied in different parts of science. Electrophoretic Deposition (EPD) is effective, fast and controllable process for obtaining various thin or thick film layers. In this study application ... -
Electrophoretic deposition of ZnO thin film in aqueous media
Doğan, Aydın; Suvacı, Ender; Günkaya, Göktuğ; Uzgur, Erman (Springer, 2004)In thin films, controlled porous structures are desired for certain ceramic gas sensors. The aim of this study was to fabricate ZnO coated substrates starting with aqueous suspensions with electrophoretic deposition ... -
Fabrication of functionally graded SiAlON ceramics by tape casting
Açıkbaş, N. Çalış; Suvacı, Ender; Mandal, Hasan (Blackwell Publishing, 2006)Functionally graded SiAlON ceramics (FG-SiAlONs) were successfully prepared by the tape casting and lamination approach. Non-aqueous SiAlON slurries with five different alpha to beta-SiAlON ratios (85 alpha:15 beta, 70 ... -
Hybrid processing and anisotropic sintering shrinkage in textured ZnO ceramics
Keskinbora, Kahraman; Suzuki, Tohru S.; Özer, I. Özgür; Sakka, Yoshio; Suvacı, Ender (Natl Inst Materials Science, 2010)We have studied the combined effects of the templated grain growth and magnetic alignment processes on sintering, anisotropic sintering shrinkage, microstructure development and texture in ZnO ceramics. Suspensions of 0-10 ... -
Microstructure-property relationship in textured ZnO-based varistors
Özer, I. Ozgür; Suvacı, Ender; Bernik, Slavko (Pergamon-Elsevier Science LTD, 2010)The relationship between microstructure texturing and electrical characteristics of a ZnO-based varistor system was investigated in comparison with a varistor system having the same chemical composition but conventional ... -
Modeling anisotropic single crystal growth kinetics in liquid phase sintered ?-Al2O3
Seabaugh, M. M.; Suvacı, Ender; Brahmaroutu, B.; Messing, Gary L. (Kluwer Academic Publishers, Dordrecht, Netherlands, 2000)Single crystals of ?-alumina with {0001}, {11¯20} and {01¯12} orientations were embedded in a matrix of liquid phase sintered alumina to study ?-alumina single crystal growth in the presence of a calcium aluminosilicate ... -
Organized growth of carbon nanotubes on Fe-doped alumina ceramic substrates
Suvacı, Ender; Çelik, Yasemin; Weibel, Alicia; Peigney, Alain; Flahaut, Emmanuel (Pergamon-Elsevier Science LTD, 2012)Polycrystalline Fe-doped alumina (Al2O3) ceramics have been produced and used as a substrate for organized carbon nanotubes (CNTs) growth by catalytic chemical vapor deposition (CCVD). In these substrates, Fe3+ cations, ...