Abstract Described is an improvement in the method of producing filamentary monocrystals by precipitation of crystal substance from a vaporous compound in a reaction vessel at elevated temperature, which comprises supplying the reaction space in the vessel with a mist of droplets formed of seed material for the monocrystals to be produced, said droplet material having a melting point 50* to 500* C. below that of the monocrystals to be produced; maintaining said reaction space at a temperature between the respective melting points of said droplet material and said monocrystals; and contacting the vaporous compound in said reaction space with said mist of droplets, whereby filamentary monocrystals grow onto the droplets. Also described is apparatus for performing the method.
The method according to claim 1, which comprises supplying said droplet material in coherent constitution into the reaction vessel, and dispersing it inside the vessel to thereby form said mist of droplets in said reaction space.
Claim 2
Dependent Claim
80 words
The method according to claim 1, which comprises continuously supplying said droplet material in coherent constitution into the vessel and dispersing it inside the vessel into said mist of droplets, passing said vaporous compound in a continuous flow through said vessel from an inlet point near the dispersing locality of said droplet material so as to entrain the droplets and the filamentary monocrystals, and collecting the monocrystals at a vessel locality spaced in the entrainment direction from said dispersing locality.
Claim 3
Dependent Claim
33 words
The method according to claim 1, which comprises supplying said droplet material and said vaporous compound near the top of said vessel, and collecting the filamentary monocrystals at the bottom of said vessel.
Claim 4
Dependent Claim
22 words
The method according to claim 1, which comprises dispersing said droplet material inside said vessel by feeding it through a plasma burner.
Claim 5
Dependent Claim
20 words
The method according to claim 5, which comprises operating the plasma burner with a mixture of hydrogen and noble gas.