Yazar "Gürmen, Sebahattin" için listeleme
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Estimation of yttrium oxide microstructural parameters using the Williamson-Hall analysis
Emil Kaya, Elif; Gürmen, Sebahattin (Taylor & Francis Ltd, 2018)Yttrium oxide (Y2O3) particles were synthesised from a yttrium nitrate solution via ultrasonic spray pyrolysis (USP) method. The effects of temperature and precursor concentration on morphology and microstructural parameters ... -
Fabrication and characterization of Yb-doped Y2O3 powders and thin films
Emil Kaya, Elif; Ünal, Fatma; Kazmanlı, Kürşat; Gürmen, Sebahattin (Carl Hanser Verlag, 2020)Yttrium oxide (Y2O3) and ytterbium (Yb)-doped Y2O3 particles were synthesized via the sol-gel method from the aqueous solution of their nitrate salts. The synthesized powders were then deposited on Corning glass substrates ... -
Hydrometallurgical recycling of waste NdFeB magnets: design of experiment, optimisation of low concentrations of sulphuric acid leaching and process analysis
Uysal, Emircan; Al, Serhat; Kaya, Elif Emil; Stopic, Srecko; Gürmen, Sebahattin; Friedrich, Bernd (Taylor & Francis, 2022)Efficient recovery of rare earth elements (REEs) from scrap NdFeB magnets is a significant requirement for a circular economy. Therefore, the development of a cost-effective and environmentally friendly leaching process ... -
NdFeB Magnets recycling process: an alternative method to produce mixed rare earth oxide from Scrap NdFeB Magnets
Kaya, Elif Emil; Kaya, Ozan; Stopic, Srecko; Gürmen, Sebahattin; Friedrich, Bernd (MDPI, 2021)Neodymium iron boron magnets (NdFeB) play a critical role in various technological applications due to their outstanding magnetic properties, such as high maximum energy product, high remanence and high coercivity. Production ... -
New proposal for size and size-distribution evaluation of nanoparticles synthesized via ultrasonic spray pyrolysis using search algorithm based on image-processing technique
Emil Kaya, Elif; Kaya, Ozan; Alkan, Gözde; Gürmen, Sebahattin; Stopic, Srecko; Friedrich, Bernd (Mdpi, 2020)Nanoparticle properties are correlated to their size, size distribution, and shape; it is essential to accurately measure these features in the field of nanoscience. In this study, silver nanoparticles (AgNPs) were synthesized ... -
Novel strategy for one-step production of attenuated Ag-containing AgCu/ZnO antibacterial-antifungal nanocomposite particles
Çakmak, Tolga; Emil Kaya, Elif; Küçük, Demet; Ebin, Burçak; Balcı, Onur; Gürmen, Sebahattin (Springer, 2020)Novel strategies have been developed to comply with Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulations to provide the same performances for antibacterial and antifungal materials. The ... -
Production of rare earth element oxide powders by solution combustion: a new approach for recycling of NdFeB magnets
Kaya, Elif Emil; Stopic, Srecko; Gürmen, Sebahattin; Friedrich, Bernd (Royal Society of Chemistry, 2022)NdFeB magnets are employed in various technological applications due to their outstanding magnetic properties, such as high maximum energy product, high remanence and high coercivity. Production of NdFeB has gathered more ... -
Recovery of rare earth elements from spent NdFeB-magnets: separation of iron through reductive smelting of the oxidized material (second part)
Chung, Hanwen; Stopic, Srecko; Kaya, Elif Emil; Gürmen, Sebahattin; Friedrich, Bernd (MDPI-Multidisciplinary Digital Publishing Institute, 2022)This paper proposes a pyrometallurgical recycling method for end-of-life NdFeB magnets by oxidizing them in air and subsequently smelting them. The smelting process enabled the recovery of rare earth elements (REEs), ... -
Recovery of rare earth elements through spent NdFeB magnet oxidation (first part)
Stopic, Srecko; Polat, Buse; Chung, Hanwen; Kaya, Elif Emil; Smiljanic, Slavko; Gürmen, Sebahattin; Friedrich, Bernd (MDPI-Multidisciplinary Digital Publishing Institute, 2022)Due to their remarkable magnetic properties, such as a high maximum energy product, high remanence, and high coercivity, NdFeB magnets are used in a variety of technological applications. Because of their very limited ... -
A straightforward approach for the synthesis of nanostructured Y2O3 particles: synthesis, morphology, microstructure and crystal imperfection
Emil Kaya, Elif; Gürmen, Sebahattin (Elsevier, 2020)A facile and straightforward approach has been implemented for the synthesis of nanostructured Y2O3 particles via sol-gel method from yttrium nitrate solution. The individual effects of calcination temperature, ... -
Tuning the morphology of ZnO nanostructures with the ultrasonic spray pyrolysis process
Emil Kaya, Elif; Alkan, Gözde; Gürmen, Sebahattin; Rudolf, Rebeka; Jenko, Darja; Friedrich, Bernd (Mdpi, 2018)Nanostructured zinc oxide (ZnO) particles were synthesized by the one step Ultrasonic Spray Pyrolysis (USP) process from nitrate salt solution (Zn(NO3)(2)center dot 6H(2)O). Various influential parameters, from Zn(NO3)(2)center ...
