Preparation of waterborne nano-antimony doped tin oxide (ATO) slurry

A waterborne nano-ATO slurry with a stability for more than 2 months was developed by using silane coupling agent to chemically modify and dispersant to physically cover the surface of nano-ATO in combination with adjusting dispersion process, viscosity and pH value of the slurry. FTIR analysis showed that silane coupling agent can be connected to the surface of nano-ATO. The optimal coverage effect was obtained when silane coupling agent KH570 was adopted with a dosage of 1.5% of the mass of nano-ATO, and the optimal dispersion effect was obtained when block copolymer dispersant 3275 was adopted with a dosage of 0.2% of the mass of slurry. The slurry has an optimal stability at viscosity 88 mPa·s and pH = 10. The transmission electron microscopic observation indicated that nano-ATO particle has a good dispersion in the slurry.