Calcined talc powder is an inorganic powder material obtained by crushing, grinding and high-temperature calcination of natural talc ore to remove crystal water. It appears as white or slightly yellow powder, odorless and tasteless, with low hardness (Mohs hardness 1-2), density of about 2.7-2.8g/cm³, and good lubricity, heat resistance and dispersibility. It is insoluble in water, acid (except hydrofluoric acid) and most organic solvents, has stable chemical properties, is resistant to acid and alkali, aging, and high temperature. It has excellent compatibility with polymer materials such as plastics, rubber, and coatings, and has certain reinforcing, toughening, and filling functions. Industrially, it is mainly used in the plastic processing field (as an inorganic filler and modifier to reduce production costs), the rubber industry (as a reinforcing filler); it is also used in the coating and ink industry, the paper industry (as a filler and sizing agent), and can also be used in ceramic glazes, cosmetic raw materials (to adjust skin feel), pharmaceutical excipients (anti-adhesive agents) and other fields.