Effect of B2O3/SiO2 Ratio on Transparency of Anorthite Based Glass-Ceramic Glazes |
| A. Tunali and N.T. Selli
Eczacıbasi Building Product Co., VitrA Innovation Center, Bozuyuk/Bilecik, Turkey |
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| The present study was undertaken to determine the influence of B2O3/SiO2 ratio on devitrification behaviour, anorthite crystal size and transparency of glass-ceramic glazes. Measurement by X-ray diffraction combined with scanning electron microscopy and energy dispersive X-ray spectroscopy microanalysis show that needle-like crystals of anorthite are formed. Sinterization and devitrification behaviour of system and viscosity change with temperature were analyzed by combining the datas that belong to differential thermal analysis and heating microscope analysis. Crystal size of anorthite was changed by modifying B2O3/SiO2 ratio. It is confirmed that additional B2O3 prevents immediate phase separation during heat treatment in anorthite based glass-ceramic glazes. |
DOI: 10.12693/APhysPolA.125.511 PACS numbers: 81.05.Mh |