Gallium extraction and aggregation studies in some amine extraction systems.

Başol, Sacit


Thermal effects of gate connected field-plates and surface passivation on AlGaN/GaN HEMTs
Kara, Doğacan; Okutucu Özyurt, Hanife Tuba; Dönmezer, Nazlı; Department of Mechanical Engineering (2018)
AlGaN/GaN high electron mobility transistors (HEMTs) are widely preferred in automotive, space, and military applications due to their superior electrical and thermal properties. However, when operated in full capacity, their electrical reliability drops significantly due to electron collapse, device degradation, concentrated heating, and mechanical stresses. To increase the reliability and maximum performance of GaN HEMTs, field-plate and surface passivation technologies are used frequently. Although signi...
Multi-criteria feasibility assessment of the monorail transportation system in metu campus
Tarighi, Amin; Sayın, Erol; Department of Industrial Engineering (2011)
The overall objective of this thesis is to assess the financial, technical and social feasibility of investing in modern Automated People Movers (APM) transportation systems, generally known as monorails, in METU campus which presents a unique opportunity to fulfill the modern-day transportation needs of METU campus. This study complements the Presidency Office’s long term goal to integrate environmental, social and economic sustainability into the policies, practices and culture of the university and ultim...
Extraction of some transition metals with N,N-dibutyl-N '-benzoylthiourea into molten paraffin at 65 degrees C
Merdivan, M; Gungor, A; Savasci, S; Aygün, Rüveyde Sezer (2000-10-02)
The solid-liquid extraction behaviour of some transition metals (Cu(II), Co(II), Ni(II), Cd(II) and Pb(II)) by the use of N,N-dibutyl-N'-benzoylthiourea as an extractant in paraffin (58-60 degrees C) has been investigated at 65.0 +/- 0.5 degrees C. The effect of equilibration time, pH of the aqueous phase, concentration of extractant and solid solvent used on the extraction efficiency of these metals have been discussed. The interferences of various ions are examined. The method has been applied to the dete...
Toughening of Polylactide by Bio-Based and Petroleum-Based Thermoplastic Elastomers
Meyva, Y.; Kaynak, Cevdet (2015-11-01)
The purpose of this study was to improve toughness of inherently very brittle polylactide (PLA) without sacrificing strength and thermal properties, so that biopolymer PLA could be used in engineering applications. For this purpose, PLA was blended with various amounts of two different thermoplastic elastomers; TPU (petroleum-based thermoplastic polyurethane) and TPE (bio-based thermoplastic polyester). Melt blending and specimen shaping were achieved by using a twin-screw extruder and injection molder, res...
Phase mixing in GaSb nanocrystals synthesized by nonequilibrium plasma aerotaxy
Üner, Necip Berker; Thimsen, Elijah (2020-05-01)
III-V semiconductor nanocrystals are an important class of optoelectronic materials. However, the gas-phase synthesis of these materials, especially of the stibnides, has been left relatively unexplored. In this study, we demonstrate the synthesis of free-standing GaSb nanocrystals for the first time, using a novel gas-phase process. We show that when elemental aerosols are used as precursors for Ga and Sb, the elements mix at the nanometer length scale as the aerosols pass through a nonequilibrium plasma r...
Citation Formats
S. Başol, “Gallium extraction and aggregation studies in some amine extraction systems.,” Ph.D. - Doctoral Program, Middle East Technical University, 1968.