In this study, amorphous SiO₂ (a-SiO₂) gel powder was prepared by an acid-base two-step catalytic sol-gel method and pre-burned at different temperatures (150 °C, 400 °C, 600 °C, and 800 °C) to obtain mesoporous formed by the accumulation of a-SiO₂ nanoparticles, in which CeO₂ was coated to form CeO₂@a-SiO₂. The CeO₂@a-SiO₂ obtained by the above-mentioned method was used as a precursor, a crystalline silica-(c-SiO₂) coated γ-Ce₂S₃ (γ-Ce₂S₃@c-SiO₂) red pigment with a plum pudding mosaic structure was obtained by sulfidation at 900 °C in CS₂ atmosphere, and calcination at 1300 °C in an Ar-protected atmosphere. A systematic study examined the influence of different pre-sintering temperatures on the morphology and microstructure of the precursor particles along with the chromaticity and thermal stability of the coated pigment. The results reveal that at a pre-sintering temperature of 400 °C, the surface area and pore volume of the precursor reached maximum values of 274 m²/g and 0.27 cm³/g, respectively, while the average aperture reached 3.49 nm. Under this experimental condition, the obtained coated pigment exhibited the highest chromaticity values of L* = 30.46, a* = 37.73, and b* = 26.41. At these values, and following calcination at 900 °C for 10 min in air, the pigment still maintained a bright-red color (L* = 27.61, a* = 29.06, and b* = 17.25); this indicates that the plum pudding mosaic-type γ-Ce₂S₃@c-SiO₂ red pigment can increase the thermal stability of γ-Ce₂S₃ from 350 °C to 900 °C. It shows that mesoporous SiO₂ can be applied to novel fields of coated pigments by structural design and high-temperature calcination.

本研究采用酸碱两步催化溶胶-凝胶法制备无定形SiO ₂（a-SiO ₂）凝胶粉，并在不同温度（150°C，400°C，600°C，和800℃），以获得中孔通过-的SiO的积累形成₂纳米颗粒，其中的CeO ₂涂布形成的CeO ₂ @一个-的SiO ₂。所述的CeO ₂ @一个-的SiO ₂通过上述方法获得的被用作前体，结晶二氧化硅（C-的SiO ₂）涂覆的γ-的Ce ₂小号₃（γ-的Ce ₂小号₃ @ C-的SiO ₂）通过在CS ₂气氛中于900°C的条件下硫化，并在Ar保护的气氛中于1300°C的条件下煅烧，获得具有李子布丁镶嵌结构的红色颜料。一项系统的研究检查了不同的预烧结温度对前驱体颗粒的形态和微观结构以及涂层颜料的色度和热稳定性的影响。结果表明，在400℃的预烧结温度下，前体的表面积和孔体积分别达到最大值274m ² / g和0.27cm³/ g，而平均孔径达到3.49nm。在该实验条件下，获得的涂层颜料表现出最高的色度值L *  = 30.46，a * = 37.73，b *  = 26.41。在这些值下，在空气中在900°C下煅烧10分钟后，颜料仍保持亮红色（L *  = 27.61，a *  = 29.06，b *  = 17.25）；这表示李子布丁马赛克型γ-的Ce ₂小号₃ @ C-的SiO ₂的红色颜料可提高γ-Ce的热稳定性₂小号₃从350℃至900℃。结果表明，通过结构设计和高温煅烧，介孔SiO ₂可以应用于涂层颜料的新领域。