K2O effect on the crystal structure and crystallization of fresnoite in BaO-TiO2- SiO2 glasses
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To study the K2O effect on the crystal structure and crystallization behavior of BaO-TiO2-SiO2 glasses, the glass-ceramics prepared were characterized using X-ray diffraction, Fourier transform infrared spectroscopy(FTIR) and a scanning electron microscope. The results showed that the K2O contents did not effect the formation of new crystals but increased the lattice constant. Combined with XRD data, the FT-IR peaks assigned to Ti-O and Si-O vibrations indicate the formation of the fresnoite (Ba2TiSi2O8) phase. The crystal shape and crystallization tendency of Ba2TiSi2O8 crystals by the K2O content were also discussed.
Abstract
To study the K2O effect on the crystal structure and crystallization behavior of BaO-TiO2-SiO2 glasses, the glass-ceramics prepared were characterized using X-ray diffraction, Fourier transform infrared spectroscopy(FTIR) and a scanning electron microscope. The results showed that the K2O contents did not effect the formation of new crystals but increased the lattice constant. Combined with XRD data, the FT-IR peaks assigned to Ti-O and Si-O vibrations indicate the formation of the fresnoite (Ba2TiSi2O8) phase. The crystal shape and crystallization tendency of Ba2TiSi2O8 crystals by the K2O content were also discussed.