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Under normal temperature and pressure, the phenolic resin impregnated carbon graphite block material can increase the weight gain rate, open porosity, hardness and bending strength of the basic performance, and through the muffle furnace and thermogravimetry analysis of its thermal stability. Phenolic resin impregnated graphite block has a better thermal stability from 0 to 450 centigrade, when the impregnated graphite is decomposed and the thermal stability is poor at more than 450 centigrade. The mechanical properties of graphite, easy to crack, fragile, limiting its use, phenolic resin has the characteristics of high thermal stability, integrity and solvent resistance and it a good binder reduce the porosity and improve the mechanical properties of graphite, and phenolic resin impregnated graphite block has…
A groove graphite boat, which comprises a plurality of with the relative groove surface and bottom supporting protrusions W-shaped bidirectional skewed, bottom surface, face, side, side and the upper end relative to the mouth and two corresponding slot surface were designed with at least a vent groove, bottom bulge supports and the relative groove surface intersection, respectively, and the design of an angular slot protective. Bottom surface at either of two adjacent W-shaped bidirectional skewed slots forming the protrusion of the lower design parallel to W-shaped bidirectional skewed slots, section shape is approximate of the V-shaped grooves. The utility model makes the hard alloy strip product uniformly in the process of hydrogen and vacuum sintering, so as to avoid the…
Quartz crucible, with high purity and strong heat resistance, large size, high precision, good heat preservation, energy saving, stable quality and other advantages, is applied more and more widely. Detection of the quartz crucible is a very important link, and the detection of the quartz crucible toward the direction of the development of field detection 1 Quartz crucible can be used in the 1450 degrees below, divided into two kinds of transparent and opaque. With arc discharge method, translucent quartz crucible is pulling large diameter single crystal silicon, the development of large scale integrated circuit essential base material. Today, the world semiconductor industry in developed countries has used this crucible instead of small transparent quartz crucible. He has high purity…
