液相一步合成金红石型超细TiO2

Rutile titania crystals were directlyprepared in liquid system without anatase-to-rutile transformation，while Ti(SO₄)₂and ammonia are the raw materials．The process of preparation can be divided into twoparts one is precipitating，the other is peptizing．The conditions of precipitatinginfluence the structure of the resulted crystals，even though Ti(OH)₄precipitates obtained during precipitating are amorphous．Peptizing is the process of theformation of crystals，the amorphous Ti(OH)₄ precipitates changing intotitania with the change of rutile structure．