Within the broad field of transition metal compounds, ferrous tungstate (FeWO₄) stands out as a representative example of an iron-group element combined with tungstate, gaining prominence in chemical and materials science research due to its unique physicochemical properties and versatile application potential. This tungstate, formed by Fe²⁺ and (WO₄)²⁻, not only inherits the magnetic commonality of iron-group elements but also exhibits rich functional characteristics due to the introduction of the tungsten-oxygen framework, opening new pathways in catalysis, energy storage, and inorganic material preparation.

Anti-fog glass usually prevents fog condensation by embedding or coating a conductive material (such as tungsten wire or conductive film) on the glass surface and heating it with electricity. Tungsten wire is often used as a heating element in anti-fog glass systems that require heating, such as car rearview mirrors, bathroom mirrors or refrigerator glass doors, due to its high melting point, high resistivity, high temperature resistance and corrosion resistance.

Defrosting glass usually uses tungsten wire as a heating element because tungsten has a high melting point, high temperature resistance and good conductivity, which is suitable for generating uniform heat on the glass surface or in the interlayer to remove frost or ice.

The main role of tungsten wire in electric heated glass windows is to act as a heating element. By using its high resistance and high temperature resistance, the glass windows are heated by the resistance heat generated when the current flows through the tungsten wire to meet the various functional requirements such as anti-fogging, defrosting and temperature regulation.