Patent ID: 7528177
Filing Date: 2009-05-05
Classification: B82Y,C01G,C01P,C09C

Abstract:
1. A preparing method for nanometer grade zinc oxide crystalline (zincite) sol, having more than 90% visible light transmission at 20 wt % and ≦15 nm average particle size, comprises of: a.) Neutralizing under pH 8˜11 an ethylene glycol solution of inorganic zinc salt with an ethylene glycol solution of inorganic alkali; b.) Optionally thicken the precipitate by settling or filtering and removing of excess supernatant until reaching a zinc concentration to 0.3˜3 mole/liter; c.) Ageing the thickened precipitate at 40˜100 deg C for 1˜6 hours until turns into transparent sol.