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1).The High Purity Graphite The high purity graphite generally refers to the amount of carbon containing more than 99.99% of graphite and in the organizational structure it can be divided into three categories: coarse grain structure, fine grain structure and ultra-fine grain structure. The basic material of the integrated circuit is mainly silicon single crystal chip, at present silicon single crystal growth process is mainly uses in Czochralski (CZ), Czochralski silicon accounted for about 80% of the total amount of silicon in the global electronics industry, the graphite piece in Czochralski silicon furnace is a consumable,we use the high purity graphite material to process the Czochralski silicon furnace heating system. Another important use of high purity graphite is process various…
The graphite heating unit is the electric furnace heating heater parts which are made of the graphite materials. The graphite has excellent electrical conductivity and thermal conductivity. In the special industrial furnace, graphite is used as a heating unit. In the early selection of industrial furnace , the graphite electrode is the heating unit, the high density of high power electrode is used as heating unit later (smelting quartz glass also use graphite electrode as the heating unit). Along with semiconductor industry development, the heating furnace which refine silicon, single crystal germanium, gallium, indium, indium and other materials select high purity ,fine structure graphite and isotropic graphite for heating. Some special industrial furnace and experimental furnace used carbon cloth or…
To prevent the heating material out, the crucible does not usually carry the melting stuff too full, and let the air for oxidation of free import and possible. The crucible for the bottom is very small, generally need to frame in the mud triangle to fire direct heating. Crucible in the iron triangle with is placed or diagonal can be seen, the requirement of experiment can be placed. The crucible after heating can not immediately be placed in cold metal on the desktop, in order to avoid it because of rapid cooling and rupture. Could not be immediately placed on a wooden table, to avoid scalding desktop or cause a fire. The correct approach for detaining natural cooling in iron…
