Study on Preparation and Properties of Precipitated Silica
In this paper silica are made in the production line and its properties are investigated. It shows that the content of SiO2 of BSZ1 is 90.24%, its specific surface area of BET is 204.70m2/g, its CTAB is 240m2/g, its oil absorption value of DBP is 2.82cm3/g, and its particle size of D50 is 5.71μm. The content of SiO2 of BSZ2 is 94.16%, its specific surface area of BET is 245.07m2/g, its CTAB is 212m2/g, its oil absorption value of DBP is 2.86cm3/g, and its particle size of D50 is 2.82μm. The content of SiO2 of BSZ3 is 92.43%, its specific surface area of BET is 355.90m2/g, its CTAB is 273m2/g, its oil absorption value of DBP is 2.70cm3/g, and its particle size D50 is 5.71μm. BSZ2 and BSZ3 are amorphous state with silanol groups on their surfaces, and they are the spherical particle with some irregular granules. BSZ1 and BSZ2 are good application in rubber as reinforcing agent.