Browsing by Author "Özbayoğlu, Gülhan"

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Citation - WoS: 22
Citation - Scopus: 23
Comparison of Different Synthesis Methods To Produce Lithium Triborate and Their Effects on Its Thermoluminescent Property
(Springer, 2010) Depci, Tolga; Özbayoğlu, Gülhan; Ozbayoglu, Gulhan; Yilmaz, Aysen; Özbayoğlu, Gülhan; Energy Systems Engineering; Energy Systems Engineering; 06. School Of Engineering; 01. Atılım University
Lithium triborate (LiB3O5) was produced by different synthesis methods, which included high-temperature solid-state reaction, microwave-assisted high-temperature solid-state reaction, and precipitation-assisted high-temperature solid-state reaction. After the synthesis, metal oxides (CuO and Al2O3) were doped into LiB3O5 to enhance its thermoluminescent (TL) properties, and the TL intensities were compared with each other. The identification and characteristics of undoped and doped LiB3O5 were determined by X-ray diffraction (XRD), Fourier transform infrared (FTIR) analyses, differential thermal analyses (DTA), scanning electron microscopy (SEM), and particle size analyzer. The glow curves were obtained by using a TL reader. The results showed that synthesis routes affected the physical and structural properties of lithium triborate, which have an important effect on its TL intensity.
Use of Boric Acid as a Binder for Briquetting Some Boron Mine Wastes and Their Calcined Products
(Parlar Scientific Publications (p S P), 2010) Sener, Savas; Özbayoğlu, Gülhan; Ozbayoglu, Gulhan; Ozdemir, Zeynep; Özbayoğlu, Gülhan; Energy Systems Engineering; Energy Systems Engineering; 06. School Of Engineering; 01. Atılım University
In this study, boric acid as a binder for briquetting some boron mine wastes, such as colemanite and ulexite fines and calcined products, which do not meet the market specifications with respect to particle size, were investigated. Effects of water and binder contents, applied pressure, and curing and drying conditions on the briquette quality were evaluated in terms of mechanical strength, water-proofing characteristics and wearing resistance. The best briquettes were obtained at 62.4 MPa pressure (cured at ambient temperature for 24 h and dried at 105 C for 2 h). Only binder free briquettes of uncalcined ulexite gave satisfactory result. The briquette strength increased with an increase in the percentage of binder. The optimum binder content was found to be 5 % by weight for uncalcined ulexite and colemanite as well as calcined colemanite, but 10 To by weight for calcined ulexite. The water-proof briquettes of ulexite and calcined products of ulexite and colemanite fines could be produced. According to wearing resistance, ulexite and colemanite fines as well as calcined product of colemanite showed resistance to abrasion action during transportation and loading.