News
Graphite/resin composite bipolar plate has aroused wide public concern due to its good moldability, high flexural strength and electrical conductivity, good corrosion resistance. In this paper, carbon nanofibers's high strength,high electrical and thermal conductivity as well as excellent surface size effect was utilized to enhance the performance of graphite / resin composite bipolar plates. Expanded graphite is widely used as the conductive filler, polyimide and benzoxazine as binder. The mixing method of expanded graphite and resin with large density difference was studied and the effect of resin content, molding temperature and pressure, holding time were also investigated. Using artificial graphite as the conductive filler and the above two kinds of resin as the binder, the paper investigated the effect of…
How to use the graphite crucible in a right is important. The first time to use it,we should heat the crucible under a 1300~1500 centigrade,and after 2~3 times,the surface of the crucible could form a sinter layer,so the service life will be longer. If we use it without the sinter layer for the first time, and melting the fusible metal,such as tin,vanadium,aluminum etc,the crucible will be broken quickly,and the graphite will be fire when it reach 700 centigrade. The crucible should be put onto the special base,and the Dia of the base should be the same as the crucible. And there should be some graphite powder and coal powder on the base. And the material of the base should also…
The service life of the graphite crucible is mainly affected by the way of using. Many customers say that their crucibles will be broken or crack after several times, and they think the problem is from the crucible quality, however,if we could use it in a better way or a right way,the service life will be longer. 1、the storage of the graphite crucible. The graphite crucible is easy to be wet,because it’s easy to absorb the moisture of in the air,so it’s better to store the crucible in a dry place,it should not be in the wet place. 2、Drying of crucible Before using each type of the crucible,it must be dry,and it should be put as bottom up display,the crucible…
