In order to reveal the raw material formula and production process of the kiln furniture such as the porcelain set bowl and mat cake of the Imperial Kiln Factory,the elemental composition,firing temperature and microstructure of the early Ming porcelain kiln furniture excavated from the northwest corner of the site of the Imperial Kiln Factory in Jingdezhen in 2021 were systematically tested by utilizing EDXRF,thermal expansion meter and other analytical means.The results show that the imperial kiln factory site excavated in the northwest corner of the early Ming porcelain set bowl and pad cake,composition and the same period of official kiln ceramic body composition is basically the same,should be the use of the same raw material production,but the porcelain set bowl and pad cake composition compared to porcelain samples of the elemental composition of the dispersion is slightly larger,combined with the comprehensive analysis of the literature to estimate that the porcelain set bowl and pad cake should be the use of the porcelain"leftover soil"The Cushion cake on the surface of a layer of artificial paint traces of obvious white small cracks without light material,composition analysis shows that an average content of Al2O3 for 36.8%of the high-alumina refractory clay,its main role is to prevent the pad burned artifacts and its adhesion,thereby reducing the artifacts fired deformation.
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