Chemistry of inorganic compounds – Phosphorus or compound thereof
Patent
1974-03-28
1976-11-09
Vertiz, Oscar R.
Chemistry of inorganic compounds
Phosphorus or compound thereof
75134T, 75149, C01B 2500, C22C 2800, C22C 1200
Patent
active
039911632
ABSTRACT:
A process for the production of compact polycrystalline III A - V B compounds such as GaP through direct synthesis from the components in a closed horizontal system, in which at least one of the components has a substantially higher partial vapor pressure over the molten compound being produced than do the other components. In carrying out the process, the components which are more difficult to vaporize are heated in a narrow reaction zone to a temperature in the range of 100.degree. to 500.degree. C below the congruent melting temperature of the compound being produced while the pressure of the easily vaporized components is adjusted so that it amounts to between 0.14 and 0.33 times the decomposition vapor pressure of the compound being produced and thus to 50 to 120 times the decomposition vapor pressure of the solution of the compound being produced in the components which are difficult to vaporize at the reaction temperature.
REFERENCES:
patent: 2938816 (1960-05-01), Gunther
patent: 3305313 (1967-02-01), Sirgo et al.
patent: 3366454 (1968-01-01), Folberth et al.
patent: 3690846 (1972-09-01), Akai et al.
Raab Gunter
Zeuch Klaus
Heller Gregory A.
Siemens Aktiengesellschaft
Vertiz Oscar R.
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