The term " pyroplasticity" refers to the deformation of the white ware that occurs during firing. In particular, this phenomenon is particularly important for tiles fired in roller kiln (especially thin and large dimensions) and the roughness created on the surface by vertical weight. In this study, 1, 3 and 5% of nanosilica and microsilica were replaced in porcelain tile batch. The effect of nano and micro silica on the pyroplasticity, flexural strength and physical properties were investigated. XRD and SEM analyzes were performed on the samples for phase and microstructural studies. The results showed that nano-silica caused more pyroplastic than micro-silica. The results showed that 1% nano silica had the lowest pyroplastic content among samples containing nano silica and micro silica. The results also showed that adding 1% nanosilica increased the flexural strength by 21.18%. The XRD results showed that the highest quartz peak intensities belonged to the microsilica sample and the lowest to the nanosilica sample.

Keywords: Porcelain tile, Pyroplastic, Micro silica, Nano silica.

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