method and device for the quantitative study of the structure of porous materials

摘要

The boundary lines of pictures of sectioned samples are tested with the electron scanning microscope and the resulting pictures added to give a summation which is used to analyse for porosity. The summation is done with a positive and negative picture of the granular structure of the sample and converted to give a view of the crystalline contour. The pairs of pictures are taken in increasing magnification and marked using characteristic morphological features. The unit consists of an electron scanning microscope (1), a picture taking block (3) whose output signals are connected to light supervision units (2, 4) a brightness control (4) and a light writing pen (5). The output signals are passed to a calculator (9) for analysis with the results stored in a data scratch pad (6).