Bismuth-oxide-base red pigment for glass digital inkjet printing and preparation method thereof

The invention relates to a bismuth-oxide-base red pigment for glass digital inkjet printing and a preparation method thereof. The invention is characterized in that the bismuth-oxide-base red pigment for glass digital inkjet printing is prepared from bismuth oxide (alpha-Bi2O3), amorphous silicon oxide (SiO2), boron oxide (B2O3), lithium oxide (Li2O), aluminum oxide (Al2O3), zirconium oxide (ZrO2) and iron red. The preparation method comprises the following steps: uniformly mixing the bismuth oxide (alpha-Bi2O3), amorphous silicon oxide (SiO2), boron oxide (B2O3), lithium oxide (Li2O), aluminum oxide (Al2O3) and zirconium oxide (ZrO2), carrying out sufficient machine alloying by high-energy ball milling, mixing the powder obtained by ball milling with the iron red, and carrying out ball milling. The maximum particle size of the bismuth-oxide-base red pigment for glass digital inkjet printing is less than 2 mu m, the sintering temperature on glass is 600-700 DEG C, and the sintered bismuth-oxide-base red pigment for glass digital inkjet printing has high binding force with glass. Thus, the bismuth-oxide-base red pigment for glass digital inkjet printing has wide application prospects in the field of digital inkjet printing.