Synthesis and chromatic properties of zircon encapsulated ceramic black pigment with carbon sphere as carbon source

Submicronic spherical inclusion black pigment by double‐shell reaction sintering

“…The optical properties of ceramic pigments depend on the particle scale and morphology . Hence, the CZS demonstrates deep dark hue, whose L * value is much lower than previously reported, as shown in Figure D (specific parameters are shown in Table ). And then the uniform of the CZS makes each CSs as an independent chromophore.…”

“…To CSs@ZrO 2 @SiO 2 microspheres, Si–OH stretching vibration and Si–O–Si stretching vibration are characterized by the peaks at 949 and 1075 cm −1 , respectively . Furthermore, the peak at 1049 cm −1 is related to the Si–O–Zr stretching vibration . It can be seen that three‐phase coexistence appears on the shell of CZS (see Figure B).…”

“…A, Particle size distribution of the inclusion pigments. B, Photographs of the pigments dispersed in glycol after 24, 48 h (the CZS in this work [left one] are compared with that [right one] our previous work) [Color figure can be viewed at wileyonlinelibrary.com]…”

“…First, 0.05 g CSs synthesized by hydrothermal method (the synthesis procedure was reported previously elsewhere) were dispersed into 200 mL deionized water (DIW) by ultrasound for 10 minutes, and further 0.0355 g zirconium sulfate were added into CSs suspension with stirring at room temperature for 2 hours to form CSs@ZrO 2 . The CSs@ZrO 2 microspheres were collected by centrifugation and sequentially rinsed with DIW and ethanol alternately for three times.…”

“…Consequently, in order to achieve the same level of tinting strength as the spinel black pigments, the following research interests have gained considerable popularity: (a) breakthroughs in the synthesis method of inclusion black pigments; (b) Carbon as the colorant for the inclusion black pigments, innovation in the selection of carbon source is indispensable. Gradually expanding to various forms of carbon source starting from CB . It is undeniable that these efforts have made the chromatic properties of inclusion black pigments reach a good level ( L * <20) .…”