초록

In this study, pumice partially or fully as a replacement for potassium feldspar to chosen hard porcelain compositions. Pumicewas added into the porcelain body in proportions 0, 5, 10, 15, 25 wt.%. The chemical and physical properties, phasemicrostructureanalysis of samples was evaluated and compared with standard porcelain composition. The crystal phases werefound as quartz, mullite and amorphous phase. It was found that the just pumice added porcelain bodies fired at 1380 ℃ hadgood technical features such as lineer shrinkage, water absorption, bulk density, and flexural strength 50.4 MPa. SEM(scanning electron microscopy) and XRD (X-ray diffraction) analysis results showed the high flexural strength was due to theformation of high mullite crystalline content in the porcelain body and the densification of microstructures. The technologicaland microstructural features of new hard porcelain bodies showed the suitability of using pumice instead of potassium feldsparas the fluxing agent in hard porcelain bodies.

키워드

Hard porcelain, Pumice, Fluxing agent, Characterization, Materials.

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