Abstract
The aim of this work was to fabricate glass-ceramic substrates using aqueous tape casting technique of the parent glass powder in the SiO2-Al2O3-MgO-Li2O system with addition of ZrO2 and B2O3. The powder mixture was melted at 1650°C/1h and the obtained glass (frit) was milled and processed by tape casting in thin substrates with 700 μm thickness. Suspensions were prepared by aqueous medium and latex emulsion binder. Flexible green tapes with few defects were obtained using suspensions prepared with 7 and 10 wt% of binder in relation to glass powder. Substrates were submitted to burn out at 700 °C and thermal treatment at 950 oC/30min, 950 oC/4h and 1000 °C/1h. The green density of the substrates was around 1.55 g/cm3 and 2.10 g/cm3 after sintering/crystallization. Microstructure in all treatments showed high porosity. The major crystalline phases identified by XRD were Li0,6Al0,6Si2,4O6, ZrO2 and ZrSiO4.
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