NOVELTY - The stirring apparatus (A) has a moving blade (2) which rotates along the internal peripheral surface of a cylindrical stirring tank (1) supplied with liquid substance containing the dissimilar material which has to be stirred inside the stirring tank. A diamond like carbon (DLC) film (100) is formed in the internal peripheral surface of the stirring tank.    USE - Stirring apparatus used for mixing and stirring of liquid or powder raw materials used in manufacture of secondary battery, fuel cell, electrode material of capacitor, foodstuff, pharmaceutical, and cosmetics (all claimed).    ADVANTAGE - The mixing of foreign material such as a metal component to the mixture can be prevented, even when abrasion occurs by the friction with the liquid substance which carries out rotation flow. The DLC film which is excellent in thermal conductivity improves the heat radiation performance of the apparatus. The fall or peeling-off or damage of the film can be prevented effectively. High degree stirring can be performed continuously for a long time, without causing the fall of heat radiation performance. The cooling effect is heightened, hence a prolonged continuous operation of the stirring apparatus is attained, without causing the situation of a quality-change of the liquid mixture by temperature rising.    DETAILED DESCRIPTION - The stirring tank is provided such that the bottomed cylindrical stirring container (10) such that the outer edge side of the top opening is closed. The moving blade is provided in the front-end portion of a rotation shaft (3) passing inside the stirring container through a center outflow hole (11A) of a blocking plate (11). The moving blade is provided in the front-end portion of the shaft, following the perimeter of the internal peripheral surface of the stirring container and is set with a porous cylindrical board (20) made of ceramics. Several supply tubes (5) are provided for supplying the raw material of the liquid substance to the bottom portion (10A) of stirring container.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the stirring apparatus.    Stirring tank (1)    Moving blade (2)    Rotation shaft (3)    Supply tube (5)    Stirring container (10)    Bottom portion (10A)    Blocking plate (11)    Center outflow hole (11A)    Cylindrical board (20)    DLC film (100)    Stirring apparatus (A)