As glass coating of W₁₈O₄₉ can guarantee high visible light transmissivity and good thermal insulating property of the glass at the same time, it has high application value in architectural windows. This kind of glass coating can effectively control the energy exchange through the window.

Monoclinic W₁₈O₄₉ can be successfully prepared by the annealing of WO3 · H2O, which is synthesized by microwave irradiation, at the temperature of 600°C. This kind of preparation method can improve the production efficiency effectively. It is simple, time-saving and green.

With good light absorbing ability and thermal insulation performance, near infrared shielding material of W₁₈O₄₉ is widely used in the windows of modern buildings and automobiles. Its application is of great importance to energy saving and environmental protection.

W₁₈O₄₉ can be prepared by solid phase method. During the preparation process, WO₃ powder and urea at a mass ratio of 1:3 are heated in a tube furnace to prepare nanosphere W₁₈O₄₉ with hollow structure. This is an efficient preparation method with low cost.