Electrochromism refers to a stable and reversible change in the color or transmittance of a material under the action of an applied voltage or electric field. At present, electrochromic materials are considered to be one of the most promising smart materials, and it is expected to have great potential application value, such as smart window, automobile anti-glare rearview mirror and electrochromic display.

There are three main types of tungsten disulfide catalysts that have high chemical activity. They are hydrogenation active catalyst, non-polar functional material catalyst and photocatalyst. Tungsten Disulfide Catalysts have high application value in petroleum industry and other important fields.

Nano tungsten disulfide can be processed by ball mill. This is a simple and low-cost method while the precision and size of nano tungsten disulfide are uncontrollable during the processing.

Biscuit shaped nano tungsten disulfide can be prepared by calcining tungsten powder, sulfur powder and K₂HPO₄ salt at the temperature of 500°C. This method is simple, low-cost and suitable for mass production.

A new kind of grease with good lubricating performance is formed by adding tungsten disulfide to lithium base grease, which is a simple and time-saving preparation method.

Tungsten disulfide is added to lithium base grease to form a new kind of grease that has good colloid performance and friction performance. It is an ideal lubricating material, which can effectively reduce the friction loss.

Supercritical carbon dioxide solvent is used to assist the extraction of tungsten disulfide and obtain less layers or single layer of tungsten disulfide. The extraction process is safe and free of pollution, which provides a reference for the preparation of other layered materials.

Tungsten disulfide coating can be used to treat three important parts of automobile engine---piston, piston ring and piston pin---with its good lubricating performance. These three parts are closely connected with the running of engine.

Tungsten disulfide has a molecular formula of WS₂ and a molecular weight of 247.97. Lubricity, conductivity and optical properties of tungsten disulfide make it an important material in mechanical lubrication and other relevant fields.

Tungsten disulfide has a molecular formula of WS₂ and a molecular weight of 247.97. It is a compound of tungsten and sulfur with grey metallic luster. Tungsten disulfide has properties including anisotropy, reactivity and catalytic activity, which make it an important material in petroleum industry and other fields.