The hollow structure of hollow ammonium metatungstate balls has multiple roles, and the following are the clearly summarized points of roles and their explanations:
High specific surface area
The hollow structure makes the ammonium metatungstate spheres have a higher specific surface area. High specific surface area means more active sites, which is favorable for improving catalytic activity and efficiency in catalytic reactions.
For example, the hollow ammonium metatungstate spheres prepared by spray-drying method had an average particle size of 1.03 μm and a wall thickness of about 100 nm, and this structure provided a large specific surface area.
Controlled release
The hollow structure allows the hollow ammonium metatungstate spheres to be used as carriers of drugs, catalysts or other active substances for slow or controlled release.
By adjusting the size of the hollow structure and the thickness of the shell layer, the rate and duration of substance release can be controlled to meet the needs of different applications.
Lightweighting
The hollow structure makes ammonium metatungstate spheres have lower density, which is conducive to the lightweighting of the material.
Hollow ammonium metatungstate spheres have potential application value in fields that need to reduce the weight of materials, such as aerospace, new energy and so on.
Improvement of mechanical properties
The hollow structure can improve the mechanical properties of ammonium metatungstate balls, such as impact resistance and compression resistance.
In some applications that need to withstand external pressure or impact, hollow ammonium metatungstate balls can show better stability.
Optimizing Optical Properties
In some optical applications, the hollow structure of hollow ammonium metatungstate spheres can optimize their optical properties, such as refractive index and transmittance.
This makes hollow ammonium metatungstate spheres potentially valuable for applications in optical devices, sensors, and other fields.
Enhanced thermal stability
The hollow structure can improve the thermal stability of ammonium metatungstate spheres to a certain extent.
Under the high temperature environment, the hollow structure can reduce the direct influence of heat on the internal material, thus improving the thermal stability of the material.
In summary, the hollow structure of hollow ammonium metatungstate spheres not only provides unique properties such as high specific surface area and controllable release, but also helps to achieve lightweight materials, improve mechanical properties, optimize optical properties, and enhance thermal stability. These effects make the hollow ammonium metatungstate spheres have a wide range of applications in the fields of catalysis, energy, aerospace, optics and so on.
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