Materials Literature
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University of Minnesota Ph.D. dissertation.June 2016. Major: Chemical Engineering. Advisors: Eray Aydil, Lorraine Francis. 1 computer file (PDF); xviii, 170 pages.
The specific removal of molecules from various media is an area receiving increasing attention. Affnity membranes, i.e. membranes containing ligands, which can specifically \ncapture target molecules, can meet this demand. One important area, in which the use of affinity membranes will be beneficial, is blood filtrati…
Το νερό ψύξης παίζει σημαντικό ρόλο στην εξαγωγή θερμότητας τόσο από το καλούπι χύτευσης όσο και του μετάλλου που στερεοποιείται κατά τη διάρκεια της Αμέσου Ψύξης Χύτευσης κραμάτων αλουμινίου και χαρακτηρίζεται από πολύπλοκα φαινόμενα βρασμού (στρωματική εξάτμιση, πυρηνικός αναβρασμός) στα στάδια μεταφοράς θερμότητας.…
Nowadays the demand for Gas Insulated Substation (GIS) is increasing over the world for efficient utilization of electric power and space. In this thesis a gas insulated substations is investigated or studied since they are more advantageous though, they use same protective devices or equipment when compared to air in…
Στην παρούσα eργασία πραγματοποιήθηκαν πeιράματα προσδιορισμού της καμπύλης υγρασίας, θ ( Η ), και πeιράματα eκροής eνός βήματος για τον προσδιορισμό της υδραυλικής αγωγιμότητας, Κ ( θ ), σe μια άμμο, ένα αμμοπηλώδeς και ένα πηλώδeς έδαφος. Οι πeιραματικές τιμές συγκρίθηκαν μe τις προβλeπόμeνeς από το eυρέως διαδeδομέ…
Η ανάλυση γραμμικής συσχέτισης βροχομeτρικών παρατηρήσeων μeταξύ μeτeωρολογικών σταθμών χρησιμοποιeίται για να απeικονίσeι τη σχέση μeταξύ μιας eξαρτημένης μeταβλητής(συνήθως ο μeτeωρολογικός σταθμός μe τη μικρότeρη πeρίοδο καταγραφής δeδομένων) και των ανeξαρτήτων μeταβλητών(γeιτονικοί σταθμοί μe μeγάλη πeρίοδο καταγ…
Purpose: Dynamic recovery is interesting as it limits the maximal deformation strength of crystalline materials. Due to its small grain size, nanocrystalline Ni reaches its maximal strength after small strains < 0.1. It is shown that dynamic recovery contributes to strain and that its kinetics differs from that of har…
We have developed a quantum molecular dynamics simulation method which can widely search hydrogen systems from an isolated hydrogen molecule to condensed hydrogen liquid, solid and supercooled liquid of strong nuclear quantumness such as zero-point energy and nuclear delocalization. We will report our recent results o…
Uniform and thin polyaniline/carbon nanofiber (PANi/CNF) hybrid nanofibers has been prepared using electrospinning method. Three polymer solutions with different components were examined for synthesis of PANi/CNF electrospun nanofibers. The SEM technique and FT-IR analysis were used to characterize the hybrid nanofibe…
This thesis reports on modelling the morphological of Block Copolymers (BCPs) byusing computer simulation. In this work, the Cell Dynamics Simulation (CDS) methodis used, which is a good compromise between computational speed and physical accuracy.First, it has been performed a 3-dimensional study of diblock copolymer…
Formation of liquid films through the deposition of droplets and spray onto a solid surface was studied experimentally. Experiments were done to observe the coalescence of highly viscous liquid droplets (87 wt% glycerin-in-water solutions) deposited onto a flat, solid steel plate. Droplets were deposited sequentially…
The effects of tempering temperature
Sepiyolitin; yapisi ile iliskili olarak ozgul yuzey alanlari, adsorpsiyon kapasitesi, kimyasal bilesimi, beyaz rengi, gozenekli yapisi, dusuk ozgul agirligi ve katalitik ozelliklerinden dolayi en onemli endustriyel minerallerden birisidir. Tetrahedral ve oktahedral oksit tabakalarinin istiflenmesi sonucu olusan lifsi…
https://doi.org/10.5604/18972764.1229423
The paper studies the thin film of TiO2 nanotube arrays about diameter of 40 μm, which grown by electrochemically second anodization using titanium foil. The structure and compositions of nanotube arrays were characterized by scanning electron microscopy (SEM). Use the same electrolytes solution can grown three sample…
Durante los anos transcurridos en el desarrollo de esta tesis, la generacion de energia electrica mundial habra crecido a un ritmo medio anual del 3.6%, que refleja las crecientes necesidades de la sociedad en terminos de suministro electrico (voltaje, densidad de potencia, frecuencia de uso, fiabilidad o temperatura…
A series of Zn1–xNixFe2O4 nano ferrite (with x=0, 0.2, 0.4, 0.6, 0.8, and 1) compositions were synthesized using the combustion technique. The powder samples were characterized by XRD. The X-ray analysis showed that the samples were single phase spinel cubic structure. The AC resistivity decreases by increasing the fr…
Silicon carbide ceramic matrix composites (SiC/SiC-CMCs) are promising materials for application in the hot section of gas turbines. SiC forms a protective SiO2 scale (TGO) which sufficiently protects the underlying material from oxidation at high temperatures in dry air. However, if rapidly flowing water vapour in a…
In the last twenty years, the continuous seek for alternative energy sources to power micro- and nano-electronic devices has marked the rise of interest toward thermoelectricity. Thermoelectric materials can turn directly, by Seebeck effect, the temperature difference into useful electric power. The energy lost as was…
In the last two decades, inorganic nanoparticles have become an active field of research due to their unique physical properties. The advancements in the control over size, shape and composition opened up many potential applications in a wide range of fields from optoelectronics to medicine. A lot of research focusses…