INVESTIGATION AT HEIDENHEIM WITH PROF. DR. PAUL GUNTHER UNIVERSITY AND HOCHSCHULE OF BRESLAU ON SILICON CRYSTALS

摘要

In operation the oven Is heated to 750°C and the systems evacuated for ten to twenty Minutes. When the pressure is down to 10-4 mm. and the Si C14 has purged the system of air, temperature is held at between 720° and 950° for three to 6 hours. The temperature of the SiCI4 normally rises from -20 C to -15°C and the pressure or the system is 40.mm. of mercury. The conditions give a super-saturated vapor of silicon which condenses on the carbon. The aluminum chloride apparently remain in the aluminum container although according to Dr. Bartels it condenses on the tube and acts as an indicator of reaction.