What Are The Methods For Testing The Fineness Of Micro Silica Powder (Silica Fume)?

The following are some common methods for testing the fineness of Ewende micro silica powder

The following are some common methods for testing the fineness of Ewende micro silica powder:

Sieving method

Weigh a certain amount of micro silica powder, pour it slowly into the corresponding mesh sieve, such as 320 mesh sieve, rinse evenly with water until the micro silica powder in the sieve is no longer falling, and then take out the residual micro silica powder in the sieve screen drying, weighing, and calculating the roughness and fineness of the passing rate through a formula, which leads to the fineness of micro silica powder.

Laser particle size analysis

The size and intensity of scattered and diffracted laser light in the sample is used to analyze the particle size distribution of the particles in the sample, which can accurately measure the fineness of the micro silica powder and reflect the proportion of particles in different particle size intervals, and the operation is simple, fast and the result is highly accurate, which is widely used in scientific research and industrial production.

Transmission Electron Microscope Method

Through the electron beam penetrates the sample of micro silica powder, observe the morphology and particle size, can visualize the microscopic morphology and size distribution of micro silica powder particles, can accurately measure the particle size of individual particles, but the sampling requirements are high, the operation is complicated, the detection speed is slow, commonly used in the fineness of micro silica powder requirements are very high or need to study the microstructure of the particles in-depth situation.

Gas Adsorption

Under specific temperature and pressure, the gas is adsorbed on the surface of micro silica powder samples, and the specific surface area of micro silica powder is calculated by measuring the amount of adsorbed gas, which in turn reflects its fineness, and it is suitable for micro silica powders with a large specific surface area, and it can provide indirect information about the surface properties and fineness of micro silica powders.