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Fabrication and characterization of carbon fiber rod [1] Carbon fiber rod is made of high - tech composite carbon fiber [2] raw silk impregnated with vinyl resin (high temperature curing). Carbon fiber has become the most important one of high performance fiber; carbon fiber with high strength, long service life, corrosion resistance, light weight, low density etc., are widely used in aviation kites, model aircraft, lamp bracket, PC equipment shaft, etching machine, medical equipment, sports equipment and other machinery and equipment. A series of excellent properties such as dimensional stability, conductivity, thermal conductivity, small coefficient of thermal expansion, self lubrication and energy absorption. It has the characteristics of high specific modulus, fatigue resistance, creep resistance, high temperature resistance, corrosion resistance…
Carbon brush, also known as brush, as a sliding contact, in many electrical equipment has been widely used. Carbon materials in the application of products are mainly graphite, graphite impregnated graphite, metal (including copper, silver) graphite. The carbon brush is the energy transfer device or signal between motor or generator or other rotating machinery of the fixed part and the rotating part, it is generally made of pure carbon coagulant, the general shape is square, stuck in the metal bracket, which has spring pressed it on the shaft, when the rotation of the motor, the power through the change which is delivered to the coil, as its main components are carbon, known as carbon brush, it is easy to wear.…
The electrode material is one of the key materials for vanadium redox flow battery. Due to the large surface area and good stability, the graphite felt is dominant. However, the graphite felt material has poor hydrophilicity, and its electrochemical activity is not good enough. This paper on the graphite felt electrode respectively chromic acid oxidation method, mixed acid electrochemical oxidation method and hydrothermal ammoniation method for processing vanadium redox flow battery to improve its activity, the main conclusions are as follows: after chromic acid oxidation, hydrophilicity and electrochemical activity of the Shi Mozhan electrode increased, the optimum processing time is 5 h. In the 10 to 70mA/cm2, the battery with the graphite felt after the treatment with the chromate has…
