Bor esaslı ve bileşiklerin elektro-deoksidasyon yöntemi ile oksitlerinden doğrudan üretimi

A study is carried out into the possibility of synthesizing TiBAl and Fe-4.6%B directly from their oxides. Of these TiBAl is a grain refiner used for casting of aluminum and aluminum alloys and Ti-4.6%B is a soft magnetic material used for transformer core or for other similar applications. The alloys were synthesized using the method of electro-deoxidation for which B2O3 and the other related oxides were used as the starting material. For this purpose, oxides were mixed in the right proportions and were sintered at temperatures around 900 °C. The oxide mixture connected to current collector as cathode were electrolyzed in a molten salt (CaCl2) maintained at 850 °C using a graphite anode. It has been shown that the synthesis of Ti-TiB is possible from their oxides, but the composition which are richer in B such as TiB2 ,i.e. the active ingredient in TiBAl is not possible for the conditions employed in this work. The use of a salt which has much lower melting point than CaCl2 would be necessary for the synthesis of TiB2 or TiBAl. For the latter alloy, the electrodeoxidation, with parameters used in the present work, yielded the composition Fe-4.6%B. The deoxidation was achieved by mixing the boric acide with Fe2O3 which were then sintered at 900 °C electrolysed in CaCl2 at 850 °C .The process yielded Fe-4,6%B powder in crystalline form. The study have demonstrated that the synthesis of boron bearing compounds are possible with processes which can be implemented on a smaller scale than the conventional ones.


Investigations on bulk glass forming ability of titanium based multicomponent alloys
Süer, Sıla; Mekhrabov, Amdulla O.; Department of Metallurgical and Materials Engineering (2008)
The aim of this study is to investigate the bulk glass forming ability (BGFA) of Ti-based alloy systems. These investigations were carried out in two main parts that are complementary to each other: theoretical and experimental. For theoretical studies, which are based on electronic theory of alloys in pseudopotential approximation, Ti-Zr, Ti-Co and Ti-Cu alloys were chosen as the binary systems. Alloying element additions were performed to each binary for the investigation of the BGFA of multicomponent Ti-...
Production and characterization of boron containing flame retardant polyamide-6 and polypropylene composites and fibers
Doğan, Mehmet; Bayramlı, Erdal; Department of Polymer Science and Technology (2011)
The main objective of this study was to produce flame retardant polyamide-6 (PA-6) and polypropylene (PP) composites and fibers containing boron compounds. The synergistic effect on flame retardancy of boron compounds (boron silicon containing oligomer (BSi), zinc borate (ZnB), boron phosphate (BPO4), metal oxide doped BPO4 and lanthanum borate (LaB)) with conventional flame retardants were investigated. The synergistic effect of nano-clay with commercial flame retardants was also investigated in order to r...
Structural and electrical properties of flash memory cells with HfO2 tunnel oxide and with/without nanocrystals
Şahin, Döndü; Turan, Raşit; Department of Physics (2009)
In this study, flash memory cells with high-k dielectric HfO2 as tunnel oxide and group IV (Si, Ge) nanocrystals were fabricated and tested. The device structure was grown by magnetron sputtering deposition method and analyzed by various diagnostic techniques such as X-ray Photoelectron Spectroscopy (XPS) and Raman spectroscopy. The use of HfO2 tunnel oxide dielectric with high permittivity constant was one of the main purposes of this study. The ultimate aim was to investigate the use of Si and Ge nanocrys...
Conjugated polymers with benzothiadiazole and benzotriazole for organic solar cells
Erer, Mert Can; Çırpan, Ali; Department of Chemistry (2019)
In this study two novel random polymers, comprising benzothiadiazole and benzotriazole as the accepting units and benzodithiophene as the donor unit, were examined in terms of their photovoltaic performance. Moreover, effects thiophene and selenophene π bridges on optical, electrochemical and optoelectronic properties of the polymers were investigated. Optical band gap values of selenophene bearing P1 and thiophene P2 were found as 1.63 eV and 1.73 eV, respectively. Characterization of polymers via UV-Vis-N...
Synthesis of liquid crystalline copolyesters with low melting temperature for in situ composite applications
Erdoğan, Selahattin; Bayramlı, Erdal; Department of Polymer Science and Technology (2011)
The objective of this study is to synthesize nematic-thermotropic liquid crystalline polymers (LCP) and determine their possible application areas. In this context, thirty different LCP’s were synthesized and categorized with respect to their fiber formation capacity, melting temperature and mechanical properties. The basic chemical structure of synthesized LCP’s were composed of p-acetoxybenzoic acid (p-ABA), m-acetoxybenzoic acid (m-ABA), hydroquinone diacetate (HQDA), terephthalic acid (TPA) and isophtha...
Citation Formats
T. Örs, T. Öztürk, İ. Karakaya, and M. K. Aydınol, “Bor esaslı ve bileşiklerin elektro-deoksidasyon yöntemi ile oksitlerinden doğrudan üretimi,” 2007. Accessed: 00, 2020. [Online]. Available: