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Morphology
Dispersed powder materials.
The following parameters are defined:
Jeol JEM-100CX and JEM-2010 electron microscopes (Japan) are designated for recording of transmission electron images with the magnification up to 1500 000 times. Accelerating voltage is 100 kV for JEM-100CX and 200 kV for JEM-2010. The lattice resolution is 0.2 nm at JEM-100CX, 0.14 nm at JEM-2010.
There are goniometers available for sample inclination up to 45° around the axes x and y and tomographic holder for the samples inclination up to 72° around the axe x. It used detachable device for the sample heating (up to 900°C) and cooling (to –170°C).
Electron microscopes are equipped with video-recording electron system, JEM-2010 is equipped by X-ray microanalyzer EDAX (EDAX Co) with semi-conductor detector, energy resolution is not worse than 130 eV. The elements from B to U are determined.
Dispersed sample in a quantity of several milligrams.
An example of reconstruction of the shape of metallic particle and carbon filament that formed on the particle in oxidation of hydrocarbons. The method of electron tomography (in High Angle Centered Dark Field regime).
The model of the surface of metal particle (reconstruction) | |
The model of carbon filament with metal particle (reconstruction) |
Dr. V.I. Zaikovskii. Catalysts and adsorbents.