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tungsten nanopowder is available in various particle sizes for various applications.
It is a useful material in certain displays and imaging applications because it offers unique optical properties at smaller scales, unseen at larger ones. Moreover, it is also used in a variety of industrial and commercial applications across diverse industries like aerospace, medical, defence etc.
Compared to bulk material, tungsten nanopowder offers more precise control of its size. This makes it a valuable material for certain applications such as lasers and microchips.
In addition, it can be utilised in various other research and commercial applications due to its high thermal conductivity. It is a good option for heat sinks, anti-armor alloys and circuit breakers.
However, it has some drawbacks, mainly in terms of its flammability and ignition potential. Therefore, it should be processed with care in a high vacuum-sealed glass capsule to avoid oxidation.
A very important factor in determining the mechanical behavior of NPs during consolidation is their initial particle size. The smaller the particle size, the less pronounced will be the grain growth during sintering. This results in a material with a more finely structured structure and denser lattice defects.
This can be largely mitigated by using a lower temperature of sintering. Alternatively, sintering can be carried out in current pulses. This method is also able to reduce the temperature and duration of the process and thus yields a more dense, well-defined material.
Similarly, the dielectric behavior of BT ceramics based on nanostructured powders can also be influenced by some specific characteristics such as their morphology and surface state. This was shown in nanoscaled BaTiO3 ceramics (Fig. 8.15A and B) synthesized by different routes: a low-temperature precipitation (
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