Changxing Mingwang Rubber & Plastic Technologies Co.,Ltd. , https://www.cxmingwang.com
Specific surface area refers to the total area per unit mass of material. There are two types of external surface area and internal surface area. The unit is m2 / g. Ideal non-porous materials only have external surface areas, such as portland cement, some clay mineral powder, etc .; porous and porous materials have external and internal surface areas, such as asbestos fiber, rock (mineral) wool, diatomaceous earth . Measurement methods include volumetric adsorption method, gravimetric adsorption method, flow adsorption method, ventilation method, and gas adhesion method. Specific surface area is one of the important indicators for evaluating the industrial utilization of catalysts, adsorbents and other porous materials such as asbestos, mineral wool, diatomaceous earth and clay minerals. The specific surface area of ​​asbestos has obvious influence on its thermal properties, adsorption capacity, chemical stability, and degree of opening cotton.
November 04, 2020