Tungsten trioxide applied for producing glass curtain wall thermal insulating coating is tungsten trioxide nanopowder. And it is also one of many kinds of metal oxides. What should be noted is that the raw material tungsten trioxide is often doped with alkali metals. And it can be CsxWO3 with good near infrared absorption. So, the glass curtain wall thermal insulating coating prepared using tungsten trioxide nanopowder as a dingal material is a smart heat-shielding material.
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You know, nowadays, nanopowders are mainly produced by using different physical methods, mechanical methods, and chemical methods. For example, the nanopowders can be produced by the sol-gel technique - one of the chemical methods. The sol-gel technique uses three main routes for preparing metal oxides. The routes include:
1.0 Hydrolysis and condensation of metal alkoxides;
2.0 Gel making of aqueous solutions contain metal-chelates;
3.0 Esterification reaction between carboxylic acids (acetic, formic, oxalic) and polymer molecules (ethylene glycol) also known as the Pechini's method.
