What is nano-alumina?
Nano-alumina has the characteristics of high strength, high hardness, good wear resistance, good heat resistance, and large specific surface area, and is widely used in various fields such as ceramic materials, composite materials, aerospace, environmental protection, catalysts and their carriers. This has also prompted the continuous improvement of its research and development technology. At present, scientists have prepared nano-alumina materials with various shapes from one-dimensional to three-dimensional, including spherical, hexagonal flakes, cubes, rods, fibers, nets, flowers, curls, etc.
Nano-alumina under scanning electron microscope
There are many methods for the preparation of nano-alumina, which can be divided into three categories according to the different reaction methods: solid-phase method, gas-phase method and liquid-phase method. In order to verify whether the results of the prepared nano-alumina powder meet expectations, it is necessary to characterize the alumina structure under each process. Among the many characterization methods, the most intuitive one is the microscopic observation method.
As a conventional microscopic characterization equipment, scanning electron microscopy has the advantages of large magnification, high resolution, large depth of field, clear imaging, and strong stereoscopic effect. It is the preferred equipment for characterizing nano-alumina structures.
The figure below shows the alumina powder prepared under different processes observed by the field emission scanning electron microscope SEM5000, which contains nano-alumina powder with cubic, flake and rod shapes, and the particle size is tens to hundreds of nanometers.
Field Emission Scanning Electron Microscope SEM5000
SEM5000 is a field emission scanning electron microscope with high resolution and rich functions. It has advanced lens barrel design, deceleration inside the lens barrel, low aberration and no magnetic leakage objective lens design, which realizes low-voltage high-resolution imaging and is applicable to on magnetic samples. SEM5000 has optical navigation, complete automatic functions, well-designed human-computer interaction, and optimized operation and use process. No matter whether the operator has rich experience or not, he can quickly get started and complete high-resolution shooting tasks.
Electron gun type: high brightness Schottky field emission electron gun
Resolution: 1 nm @ 15 kV
1.5nm @ 1kV
Magnification: 1 ~ 2500000 x
Acceleration voltage: 20 V ~ 30 kV
Sample stage: five-axis automatic sample stage
