Specific measurements on powders
CETIM CERMAT is working with two types of devices to characterise powders:
A Laser Granulometer:
The principle of the Laser sensor relies on analysis of the diffraction pattern of a laser beam modified by particles present in solution. The granulometer is equipped with a measuring cell called “Micro Volume" (12 ml) allowing extremely small quantities to be worked on in solution with all solvents. Thus, the granulometer measures the quantity of particles directly in solution as well as their distribution in terms of size. The measurement range is between 0.375µm-2000µm. This device is also used for characterisation of polymers in solution.
Results of granulometry with size distribution of the sample
A specific surface measurement device:
The specific surface (that is the surface developed by a gram of product) can vary considerably in relation to the size, shape and porosity of the powder. The effect of porosity can often be preponderant over size and shape. The B.E.T. (Brunauer, Emmett and Teller) monopoint method allows powders to be characterised and offers the advantages of simplicity and speed of analysis.
CETIM-CERMAT / 21, rue de Chemnitz BP 2278 - 68068 Mulhouse Cedex
Tél : 03 89 32 72 20 / Fax : 03 89 59 97 87