Effects of Additive on the Formation of Calcium Carbonate by Homogeneous Precipitation Method

摘要

Calcite and aragonite are formed by homogeneous precipitation method utilized hydrolysis of urea. Calcite is formed by agitating the reaction solution, aragonite is formed by without agitating the reaction solution. But, the yield of them were about 40 percent. Then, the formation area with addition of hydrogen peroxide and glutamic acid were investigated. As a result, calcite and aragonite were obtained with more than 90 percent yield by adding a hydrogen peroxide. Vaterite was obtained with more than 90 percent yield by adding hydrogen peroxide and gultamate.