Production stages

1 DECOMPOSITION

DECOMPOSITION

Process purpose — germanium tetrachloride making from source raws and reverts. Process is carried on decomposition reactors.

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2 HYDROLYSIS

HYDROLYSIS

Process purpose — germanium dioxide making. Process is carried on interaction between germanium tetrachloride and water.

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3 RECOVERING

RECOVERING

Process purpose — polycrystalline metallic germanium making. Process is carried on in hydrogen service in tube-type furnaces with two temperature zones.

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4 ZONE REFINING

ZONE REFINING

Process purpose — metallurgical refining by multiple recrystallization, zone refined polycrystalline germanium making. Process is carried on multiple-tube units with moving inductors.

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5 PULLING

PULLING

Process purpose — making of monocrystalline germanium with defined electrophysical and optical specification. Crystal growing made by Czochralski method.

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6 MACHINING

MACHINING

Process purpose — making of different shapes germanium blanks. Machining is made by using of different types of equipment: calibration, shearing, grinding equipment for flat and spherical surfaces, chamfering and irregular shapes machining equipment.

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