Abstract
In order to improve the bending strength of mullite ceramic thin tiles, SiO2-ZnO-Na2O-Y2O3 glass was prepared on the surface of the tiles. The influences of the thermal properties and thermal expansion coefficient of the glass and the sintering temperature on the structure and the property of the composites were investigated by differential thermal analysis (DTA), X-Ray Diffraction (XRD), Raman and scanning electron microscopy (SEM). The bending strength of the composites was measured with an universal testing machine. Results show that the crystallization temperature of the SiO2-ZnO-Na2O-Y2O3 glass is higher than that of SiO2-ZnO-Na2O glass. The corresponding crystallites show more complex structure for the SiO2-ZnO-Na2O-Y2O3 glass. The thermal expansion coefficients of both glasses are lower than the mullite ceramic tiles. The bending strength of the composites after sintering at 1150°C was obviously improved by 10.7% to 106.2 MPa, compared with the mullite ceramic tiles.
Highlights
IntroductionLarge ultra-thin dry-pressing thin ceramic tiles have many excellent properties, such as thinness, large size (900 mm × 1800 mm × 5.5 mm), lower weight (only 1/3 - 1/2 of regular ceramic wall and floor tile) and saving of source material and energy and reducing of dust and gas
Large ultra-thin dry-pressing thin ceramic tiles have many excellent properties, such as thinness, large size (900 mm × 1800 mm × 5.5 mm), lower weight and saving of source material and energy and reducing of dust and gas
The influences of the thermal properties and thermal expansion coefficient of the glass and the sintering temperature on the structure and the property of the composites were investigated by differential thermal analysis (DTA), X-Ray Diffraction (XRD), Raman and scanning electron microscopy (SEM)
Summary
Large ultra-thin dry-pressing thin ceramic tiles have many excellent properties, such as thinness, large size (900 mm × 1800 mm × 5.5 mm), lower weight (only 1/3 - 1/2 of regular ceramic wall and floor tile) and saving of source material and energy and reducing of dust and gas It is becoming one of developing low-carbon green environmental new product advocated by all the countries in the world [1]. Ceramic tile is used as a matrix and about 5 - 10 mm microcrystal glass frit is added on its surface It is sintered at high temperature and the glass/ceramic composites are obtained. The influences of the thermal properties and thermal expansion coefficient of the glasses and the sintering temperature of the composites on the structure and the property of the composites were investigated
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