Explanation

The specific surface refers to the total area of materials per unit mass. There are two categories: external surface area and internal surface area. Ideal non porous materials only have surface area, such as Portland cement, some clay mineral particles, etc; Porous and porous materials have external and internal surface areas, such as asbestos fiber, rock (mineral) wool, diatomite, etc. The measurement methods include volume adsorption method, weight adsorption method, flow adsorption method, permeability method, gas adhesion method, etc. specific surface is one of the important indicators to evaluate the industrial utilization of catalysts, adsorbents and other porous materials such as asbestos, mineral wool, diatomite and clay minerals. The specific surface of asbestos has a significant impact on its thermal properties, adsorption capacity, chemical stability, opening degree, etc.

Classification