Compositional investigation and phase identification of 13th century Anatolian Seljuk glazed tiles

Glazed tiles from five madrasas built in Anatolia by Seljuks during 13th century were examined using multianalytical techniques to discover production processes, firing temperatures, raw materials and nature of colorants used. Turquoise colored glazes were assessed to be of the type tin-opacified lead-alkali whereas the violet-brown colored glaze was determined to be of the transparent alkali type. Copper and manganese were identified to be responsible for the turquoise and violet-brown color of the glazes, respectively. Firing temperatures of the glazes were estimated using polymerization indices calculated by using Raman spectra of the samples and assessed to be in the range of 800-1000 degrees C. Bodies of the glazes were determined to be produced using quartz, low calcareous and non-calcareous clays. No slip layers were observed between the glaze and the body in the samples. Gas bubbles observed inside the glaze layers in some of the samples suggested that glazes might have been applied on a non-fired body. Tin-opacified lead-alkali glazes investigated in this study were suggested to be produced in the specialist centers in Anatolia which were limited in quantity during the Seljuk period.


Optical characterization of silicon based hydrogenated amorphous thin films by un-visible and infrared measurements
Kılıç, İlker; Katırcıoğlu, Bayram; Department of Physics (2006)
Various carbon content hydrogenated amorphous silicon carbide (a-Si1ŁxCx:H) and hydrogenated amorphous silicon (a-Si:H) thin films have been deposited on various substrates by using plasma enhanced chemical vapour deposition (PECVD) technique. Transmission spectra of these films have been determined within UV-Visible region and the obtained data were analysed to find related physical constants such as; refractive indices, thicknesses, etc. Fourier transform infrared (FT-IR) spectrometry technique has been u...
Optimization of microwave-assisted extraction of phenolic compounds from tomato: Characterization by FTIR and HPLC and comparison with conventional solvent extraction
Baltacıoğlu, Hande; Baltacıoğlu, Cem; Okur, İlhami; Tanrıvermiş, Arif; Yalıç, Muharrem (Elsevier BV, 2021-03-01)
© 2021 Elsevier B.V.In the extraction of phenolic compounds from tomato, Microwave-Assisted Extraction (MAE) was used as a novel technology in this study and compared to conventional solvent extraction (CSE). The optimal extraction conditions for tomato were determined using the multi-level factorial design. For this purpose, different powers (360, 600 and 900 W) and times (30, 60 and 90 s) were used for MAE and also different temperatures (40, 50 and 60 °C) and times (10, 20 and 30 min) were used for CSE. ...
Temperature dependence of the spetroscopic and structural properties of T1GaS2 and T1InS2 crystals
Açıkgöz, Muhammed; Özkan, Hüsnü; Department of Physics (2004)
The results of photoluminescence (PL) spectra of TlGaS2 single crystal were reported in the 500-1400 nm wavelength and in the 15-115 K temperature range. Three broad PL bands with an asymmetric Gaussian lineshapes were observed to be centered at 568 nm (A-band), 718 nm (B-band) and 1102 nm (C-band). The shift of the emission band peak energy as well as the change of the half-width of the emission band with temperature and excitation laser intensity were also studied. We analyzed the observed results using t...
Material characterization with terahertz time-domain spectroscopy
Köseoğlu, Devrim; Bilikmen, Kadri Sinan; Department of Physics (2010)
Terahertz time-domain spectroscopy systems were developed and used for the anaylsis and characterization of various materials. By using ultra-fast Ti:Sapphire and Er-doped fiber lasers, terahertz time-domain spectrometers of different configurations were constructed and tested. To increase the accuracy and sensitivity of the measurements, the systems were optimized for spectroscopic analysis. MBE grown nominally undoped epitaxial GaAs samples were used for the spectroscopic measurements. These samples were ...
Recovery of Iron from Turkish and Iranian Red Muds
Eray, Said; Keskinkılıç, Ender; Topkaya, Yavuz Ali; Geveci, Ahmet (2022-01-01)
Turkish and Iranian red mud samples of different composition and mineralogy were processed by solid-state reduction followed by wet magnetic separation and smelting, two commonly used pyrometallurgical methods for iron recovery. The application of these two methods on the same samples allowed them to be compared thoroughly and to be examined for versatility. The results showed that it was possible to recover more than 90% of iron using both methods. However, the concentrate obtained by the first method cont...
Citation Formats
B. A. Güney, “Compositional investigation and phase identification of 13th century Anatolian Seljuk glazed tiles,” VIBRATIONAL SPECTROSCOPY, pp. 0–0, 2020, Accessed: 00, 2020. [Online]. Available: