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Also known as quartz ceramic fused silica ceramics, quartz glass, quartz glass ceramic sintered products, fused silica sintered products (fused silica or fused silica ceramic) is the use of fused quartz or quartz glass as raw material, crushing, molding, sintering and a series of ceramic production process for preparation of products. Quartz ceramic was first developed in 1963 by the United States, and the first to achieve industrial production. In 1972, China Refractory Material Research Institute of China began to develop the new material, which was put into production in refractory material factory. The quartz ceramic not only has many good properties, such as quartz glass thermal expansion coefficient, good thermal shock resistance, good electrical properties, good performance, nuclear chemical…
All vanadium redox flow battery, using vanadium ion solution as positive and negative electrode active material, the cathode is V (IV) /V (V) of V cathode, (II) /V (III) on the electric potential difference, the standard is about 1.25 V. The battery has the advantages of large capacity, long service life, deep discharge and no damage to the battery, and can realize the instantaneous recharging. At present, the development of vanadium battery is hindered by the electrode material, and the electrode material target is PAN base felt. At present, the production of PAN carbon felt is mainly used as thermal insulation material, the conductivity and electrochemical activity can not meet the requirements of the battery. The effect of heat treatment…
Flexible graphite, which is really flexible and resilient, is called expanded graphite and vermicular graphite, who is pure graphite material not containing any binder or adhesive substances, and which owns features of corrosion resistance, high temperature resistance, low temperature resistance, radiation resistance and anisotropic resistance, and which also can be applied in lubricating. Flexible graphite particles can be produced into mechanical sealing product, such as, graphite sheet foil, graphite packing ring, stainless steel graphite spiral-wound gasket. By the way, flexible graphite product can produced in different shape to meet different shape demands. As for property, in crystral structure aspect, there is no difference existing between flexible graphite and ordinary graphite. However, because of different produce flow, flexible graphite has its…
