METHOD OF OBTAINING ARRANGEMENT FOR A ROTARY SHAFT, DISPOSED IN AN OIL CHAMBER FILLED WITH OIL AT PRESSURE LOWER THAN AMBIENT PRESSURE, IN PARTICULAR FOR USE IN IMMERSION TYPE ROTARY MACHINES

摘要

Method for producing micropowder of a solid boron solution in silicone carbide, characterised in that a carbothermal reaction of reduction of amorphous silica, containing atomically dispersed boron and obtained through hydrolysis of a solution of organic silicon compounds and boric acids, is carried out with carbon derived from decomposition of organic compounds, or with dispergated charcoal, or carbon black in an atmosphere of an inert gas in the temperature range 1473-2173 K.