Pt can reduce the harm done

Pt crucible use and protection
Usually a Pt crucible(lcd module), generally with two layers of refractory protective outer layer using a sintered products, the inner refractory filler filling. Sintered products Pt main role is to provide sufficient strength to the crucible, the sintering temperature of such products 1500 ~ 1650 ℃, in the usual optical glass glass melting, fining temperature is far lower than this, so in such products have a very high temperature good high temperature strength; filling material is generally used Al2O3 and high temperature cement (the main component of Al2O3, SiO2 with a small amount of a lithium salt made of cement binder). From the "flash" from the narrative learned that, in a high temperature Pt crucible must be isolated as much as possible the air, so the installation must be good filler wrapped Pt, that during the repair, (Graphic LCD Display)Pt crucible was not good coverage, the filler and a Pt layer of air is formed directly, and the crucible wall as the filler there is a temperature difference between, on one side at a low temperature that a large number of Pt particles condense here.
However, at high filler shrinkage after sintering of Pt difficult to isolate the air, then gas may be considered a method to prevent the reaction.