C - Chemistry – Metallurgy – 30 – B
Patent
C - Chemistry, Metallurgy
30
B
148/1
C30B 27/02 (2006.01) C22C 1/00 (2006.01) C30B 29/46 (2006.01) C30B 29/48 (2006.01)
Patent
CA 2292853
A process for producing polycrystalline compounds of high purity and correct stoichiometry, comprising the steps of: placing stoichiometric amounts of at least two reactants in a first region; placing an amount of an encapsulant in a second region sufficient to completely surround the reactants when the encapsulant is in a molten state, the second region being suitable for the transfer of the encapsulant in a molten state into the first region and thew first and second regions being capable of being heated separately from each other; creating a suitable environment of gas around the first and second regions; heating said second region to a first temperature sufficient to melt the encapsulant while not heating the first region, the first region being maintained at a temperature sufficient to avoid vaporization of said reactants thus causing said encapsulant, in a molten state, to move from said second region into said first region and surround said reactants; heating the reactants to a second temperature sufficient to melt and cause reactants to react; and heating the reaction product to a third temperature sufficient to melt for a time sufficient to synthesize and homogenize.
Gorog Tamas
Zanotti Lucio
Zappettini Andrea
Zha Mingzheng
Zuccalli Giovanni
Corning O.t.i. S.p.a.
Kirby Eades Gale Baker
Pirelli Cavi E. Sistemi S.p.a.
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