Effect of Precursor Preparation Methods on the Microstructure and Properties of Ba2+Doped γ-Ce2S3 Pigments
In this work,the precursor of Ba2+doped γ-Ce2S3 pigments was prepared by low-temperature combustion synthesis (LCS) and the co-precipitation method,respectively. The effects of different preparation methods on the phase composition,pore size,micromorphology of the γ-Ce2S3 pigment precursors,sulfuration temperature and particle size of the pigment obtained were systematically studied. The results show that the ultrafine precursor particles synthesized via LCS possess a three-dimensional network porous structure,demonstrating a higher specific surface area (27.05 m2/g) compared to the co-precipitation method. Additionally,the sulfuration temperature for the γ-Ce2S3 pigment precursors prepared by LCS was reduced from 900℃ to 850℃,resulting in an average particle size of the pigment obtained decreasing from 14.07 μm to 3.89 μm. Under the condition of maintaining a stable value a*,the values b* and L* of γ-Ce2S3 prepared by the LCS method are higher than those prepared by co-precipitation,resulting in a brighter overall color for the pigment.
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