Method for processing images of transmissive electron microscope in high resolution for crystallite of coke

Abstract

The invention discloses a method of dealing with coke microlite distinguish transmission electricity glass image, including the steps of: 1.imaging filtration, making two-dimensional fast Fourier to the primitive coke HRTEM picture, filtering frequency chart in range of certain frequency, again carrying on anti-fast Fourier to transform for the substantive chart; 2. imaging division, in 0-255 definite values, and filtering division substantive chart for the black and white two values chart. 3. Striping skeleton: Transforming stripe the in black and white two values chart into the single picture element stripe. This invention provides a method of processing the coke microlite high distinguishes the radio mirror picture, its may obtain the primitive coke HRTEM picture transformation the clear graphite microlite stripe chart, and may be directly used to calculate graphite microlite size and slice space parameter, and so on.

Description

technical field [0001] The invention relates to a processing method for high-resolution transmission electron microscope images of coke microcrystals. Background technique [0002] As a lattice imaging technique, high-resolution transmission electron microscopy (HRTEM) has a resolution of 0.14nm and can directly observe the microstructure of crystals. On the one hand, it can provide the most direct evidence for the crystal structure at the atomic level. On the other hand, , if it is a regular crystal, the structural parameters of the crystal can be directly calculated through the HRTEM lattice image, so that the macroscopic properties of the substance can be theoretically explained, and the relationship between the microscopic structure and the macroscopic properties of the substance can be revealed. [0003] Coke is obtained from coal through coking. In the metallurgical industry, especially in the field of ironmaking, coke has a very important application. The research on...

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Problems solved by technology

like figure 1 As shown, it is a typical original HRTEM image of coke, obviously figure 1 The information shown in can not meet the above requirements. This is because the diameter of the graphite layer in coke is very small, that is, the size of the microcrystalline unit is very small, usually only about a few nanometers, which is limited to the resolution that can be achieved by the transmission electron microscope. The clarity and sharpness of the coke crystallite image obtained by HRTEM is not enough to support the calculation of various crystal structure parameters directly from the image, so that the research of coke crystallite structure by high-resolution transmission electron microscopy is only in the qualitative stage , image quality becomes the bottleneck in the leap from qualitative to quantitative

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