Nano grain size blue tungsten oxide is a new type of nanomaterial that may be applied for producing heat-insulating glass window film. As you may have known, what we usually call blue tungsten oxide powder refers to agglomerates on the metallurgical definition. The agglomerates are the basic composition of the powder. Therefore, the study of the microstructure needs to start with the formation of the agglomerates.
Firstly, the surface morphology of the powder, that is, the appearance of the agglomerate, was studied by scanning electron microscopy. As the scanning electron microscope has the characteristics of wide variable magnification range, large depth of field and high resolution, the original surface of the large-sized sample can be directly observed. Secondly, the internal structure of blue tungsten oxide powder was studied by transmission electron microscopy, that is, observing the constitution of the agglomerates and the morphology of the crystal grains constituting the agglomerates, as the transmission electron microscope has the characteristics of high magnification and good resolution.
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