Mineralogical, crystallographic and technological characteristics of Yaylayolu kaolin (Kütahya, Turkey)
Abstract:The Yaylayolu kaolin deposit is situated in the vicinity of Tavşanlı, Kütahya, western Turkey. Mineral identification and characterization studies were conducted using powder X-ray diffraction (XRD), differential thermal analyses (DTA), scanning electron microscopy with an energy dispersive X-ray spectrometer (SEM-EDX), X-ray fluorescence (XRF) and Fourier transform infrared spectroscopy (FTIR) techniques. The degree of crystallinity, Hinckley's index (HI) and the Stoch index (SI) values were determined for kaolinite from the deposit.
Five representative samples from the kaolin deposit were used for ceramic technological tests. Particle size distribution, pH value, loss on ignition, Al2O3, Fe2O3 and TiO2 contents were determined, drying shrinkage, firing shrinkage, dry bend strength, fired bend strength, water absorption, pfefferkorn plasticity index, whiteness of the fired and unfired samples (L* value) and bulk density were measured. The kaolin was found to be suitable for making white cement and wall tiles, floor tiles, and tableware items which are shaped by dry pressing and extrusion.
Document Type: Research Article
Publication date: September 1, 2011