Quantitative XRD analysis of porcelains was performed and showed that the internal standard method using fluorite as the standard is appropriate for phase quantification. The presence of free quartz in the ball clays reduces the amount of alumina available for mullite formation, thereby limiting mullite levels in the fired porcelains. The XRD results were supported by SEM analysis of polished and etched samples. Preliminary in-situ XRD results show tat the technique is well suited for tracking the phase formation in porcelains. Future work will focus on using this technique for the development of fast-firing schedules for electrical porcelains.
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