On the importance of the comparative surface area and pore size analysis accuracy of the intelligent degassing unit

With the development of nanotechnology and new energy materials this year, more and more materials need to be analyzed for specific surface area and pore size, which are no longer limited to traditional porous, catalytic and powder materials.

The first step is to discuss how to prepare the sample correctly to make the subsequent data analysis more reliable. Before performing the experiment, solid surface contaminants and free water should be removed, and this preparation process is called degassing. The specific surface area value is related to the degassing temperature, degassing time and degassing vacuum, so there is a deviation in the BET specific surface results. Intelligent degassing can accurately control the temperature, time, vacuum atmosphere and other conditions of degassing, which provides a good basis for subsequent accurate measurement of specific surface area.

The SSA4000 and SSA7000 specific surface area and pore size analyzers are equipped with AI intelligent degassing system (MD200S intelligent degassing system), for some special samples, such as easy to oxidize, easy to decompose, and sensitive materials, intelligent degassing can automatically select the appropriate degassing strategy according to the sample characteristics, maintain the original characteristics of the sample, and achieve fast and effective degassing.

MD-200S intelligent degassing system, built-in pressure sensor real-time measurement of pressure changes in the system, △P change rate will not increase sharply, IPID system automatically adjusts the pumping rate, if the pressure remains stable within 15 minutes, it can automatically judge the completion of degassing; Equipped with a special degassing scheme for ultra-light and ultra-fine samples, it is easy to operate and can be completed with one button.