Nano-tungsten trioxide has relatively high thermal stability and can maintain its structural stability and performance under high temperature conditions. Its thermal stability is mainly affected by the following factors:
Crystalline phase
Nano-tungsten trioxide mainly has two common crystal phases, namely monoclinic phase and cubic phase. Monoclinic nano-tungsten trioxide has good thermal stability at high temperature and can maintain the integrity of the crystal structure. The nano-tungsten trioxide in the cubic phase may undergo a phase transition at higher temperatures, resulting in a change in structure and a decrease in performance.
Nano size effect
Nano-tungsten trioxide has a nano-size effect, and its properties may be different from bulk materials. Due to the existence of nanometer size, the surface area of nano-tungsten trioxide increases, and the interaction with the surrounding environment is enhanced. This can alter its thermal stability, enabling it to remain stable at higher temperatures.
Lattice Defects and Surface Defects
The presence of lattice and surface defects in nano-tungsten trioxide also plays an important role in its thermal stability. Defect sites can undertake deformations caused by stress and thermal expansion in the crystal structure, thereby slowing down the change of the crystal structure. In addition, defect sites can also affect the interaction between nano-tungsten trioxide and the surrounding environment, further regulating its thermal stability.
It should be noted that the thermal stability of nano-tungsten trioxide is affected by factors such as the specific preparation method, nanometer size, crystal phase, and doping. In practical applications, if it is necessary to use nano-tungsten trioxide under high temperature conditions, the thermal stability of the material and the temperature requirements of the environment should be considered to ens
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