Violet Tungsten Oxide Applied for Building Glass Energy Saving Coating

Violet tungsten oxide may be applied for preparing building glass energy saving coating, which has a wider application for energy saving reconstruction of building. Therefore, violet tungsten oxide nano powder is more and more popular in the field of heat insulation. So, primary scholars may want to know - how to know the specific surface area and pore size distribution of nano violet tungsten oxide particles?

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By BET test. Specifically, the specific surface area of violet tungsten oxide nanoparticles can be tested by the 3H-2000PS/type static capacity method, and the specific surface area of the W18O49 particles is analyzed by using a pore size analyzer. The test instrument adopts the nitrogen adsorption principle to test the specific surface area of the W18O49 powder at an ultra-low temperature of 77K, by applying a certain pressure to the sample space and changing the applied pressure. When the pressure is increased, the W18O49 nanopowder adsorbs nitrogen molecules. When the pressure is reduced, the adsorbed nitrogen molecules desorb. Then, the specific surface area of the W18O49 particles was determined equivalently by the BET theoretical model.

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