Role of α‐Fe ₂ O ₃ Morphology on the Color of Red Pigment for Porcelain

To produce a new red pigment for Japanese porcelains, some hematite (α‐Fe 2 O 3 ) powders produced by different methods were investigated by mixing them with lead‐free frit powders and firing them on white porcelain plates at 800°C. Commercial hematite powders and uniform α‐Fe 2 O 3 powders 155 and 53 nm in diameter which were prepared using conventional‐ and microwave‐hydrothermal reactions, respectively, were used as sources of red pigments. The morphology and dispersion of the above α‐Fe 2 O 3 powders were found to have a significant effect on the tone of red color for porcelain pigment.