BET比表面积测试可用于测颗粒的比表面积、 孔容 、 孔径分布 以及氮气吸附脱附曲线。 对于研究颗粒的性质有重要作用。 比表面积是颗粒所有能够接触空气的表面积之和，是外部表面积和内部孔的表面积之和，单位是m2/g；粒径指颗粒的大小,单位一般用 长度单位 或 目数 表示。 比表面积在多孔物质上尤为重要，因为同样粒径大小的颗粒可能因为 孔结构 的不同而拥有不同的比表面积。 测比表面积用 比表面积分析仪，测粒度用 粒度仪。 有的粒度仪最后也会显示一个比表面积 …

Brunauer–Emmett–Teller (BET) theory aims to explain the physical adsorption of gas molecules on a solid surface and serves as the basis for an important analysis technique for the measurement of the specific surface area of materials.

BET Specific Surface Area is the most widely recognized technique for determining the surface area of solids and powders. Samples are first prepared by drying, with a flow of inert gas or vacuum atmosphere, to clear the surface of any contaminants.

The Brunauer–Emmett–Teller (BET) method was used to determine the specific surface area of fly ash and coated fly ash. The specific surface area of coated fly ash is found to be 8.69–10.01 m 2 g −1, which is three times greater than that of fly ash whose specific surface area is …

The dBET is an average surface diameter calculated from the measurement of the specific surface area assuming the particles are spherical and monodisperse. It is calculated using the formula dBET [μm]=6/(S×ρ) with S = BET specific surface area [m2/g] and ρ = …

著名的Brunauer-Emmett-Teller法（BET法）就是基于这种现象，用于确定材料的表面积。 材料SSA的第二个定义是几何 比表面积。 相关的测量结果是通过使用光学显微镜测量颗粒尺寸来获得的。 第三个定义称为湿表面积。 该定义考虑了微观表面纹理。 具有可忽略不计的润湿角的液体对颗粒的润湿导致在颗粒与其环境之间形成相界面。 表面积是根据创建界面所需的液体体积确定的。 湿表面积在与固体材料在液体中的化学反应相关的研究中更有用。 BET方法是评估粉末材料 …

2024年11月10日 · Determining the exact surface area based on the volume of gas adsorbed at various pressures offers crucial details about a material’s porosity, roughness, and available surface area for chemical reactions. The BET equation, which connects the gas pressure and the amount of gas adsorbed, is used to examine the data.

The AMI-Meso series specific surface area and pore size analyzer is a fast and economical instrument that can meet multiple pharmaceutical test methods. This instrument can not only reliably test ultra-low specific surface area samples, but it can also help determine product performance and even help predict the promise of a specific sample’s ...

The specific surface area of a powder is determined by physical adsorption of a gas on the surface of the solid and by calculating the amount of adsorbate gas corresponding to a monomolecular layer on the surface.

2023年9月19日 · BET Specific Surface Area is the most widely recognized technique for determining the surface area of solids and powders. The ability to measure a broad range of surfaces from non-porous solids to highly porous powders has proven the technique valuable across multiple industries including pharmaceutical, environmental, automotive, chemical ...