The precipitated silica matting agent was synthesized by chem-deposit method,sodium silicate and sulfurric acid as raw materials,appending dispersant and surfactant.The optimal parameters for the required precipitated...The precipitated silica matting agent was synthesized by chem-deposit method,sodium silicate and sulfurric acid as raw materials,appending dispersant and surfactant.The optimal parameters for the required precipitated silica with excellent properties are temperature 70~85℃,pH value 9,reaction liquid mass concentration 20%,the calcined temperature between 450~480℃.The result shows that the prepared precipitated silica pore volume is 1.0~1.3cm3/g,the partical size is smaller than 10um,D50 approximately 5um.The surface area is 320~430m2/g,the pore size is between 147~388.展开更多
文摘The precipitated silica matting agent was synthesized by chem-deposit method,sodium silicate and sulfurric acid as raw materials,appending dispersant and surfactant.The optimal parameters for the required precipitated silica with excellent properties are temperature 70~85℃,pH value 9,reaction liquid mass concentration 20%,the calcined temperature between 450~480℃.The result shows that the prepared precipitated silica pore volume is 1.0~1.3cm3/g,the partical size is smaller than 10um,D50 approximately 5um.The surface area is 320~430m2/g,the pore size is between 147~388.