摘要:
SILICON DIOXIDE IN FINELY SUBDIVIDED FORM IS PRODUCED BY PASSING A MIXTURE OF SILICON HALIDES AND OXYGEN THROUGH A TURBULENT, OR FLUIDIZED BED OF HEATED PARTICLES OF SOLIDS WHICH REACT WITH ONE OR BOTH OF THE GASES PASSED THERETHROUGH. EXAMPLES OF SUCH SOLIDS INCLUDE SILICON CARBIDE, FERROSILICON, SILICON, AND THE LIKE. THE BED IS PREFERABLY FLUIDIZED, AND IS MAINTAINED AT A TEMPERATURE OF THE ORDER OF AT LEAST 1000*C.
摘要:
The present invention relates to refractory, corrosion-resistant materials, suitable for the production of crucibles and the like, produced by compressing at elevated temperatures and pressures mixtures comprising 10-16 percent, by weight, of aluminum nitride and 90-40 percent, by weight, of boron nitride containing 5-25 percent, by weight, of boron oxide.
摘要:
A PROCESS FOR MANUFACTURING BORON HALIDES WHICH COMPRISES REACTING A MIXTURE OF BORON CARBIDE OR ITS CONSTITUENT ELEMENTS, AND A BORIDE OF A METAL OF THE FIRST, SECOND OR THIRD MAIN GROUPS OF THE PERIODIC SYSTEM, WITH A HALOGEN.
摘要:
A process for making iron sponge from iron ores containing at least 95 percent by weight of iron oxide, which comprises pulverizing the iron ore and adding silicon carbide thereto, pelletizing the mixture, and subjecting it to direct reduction. The invention also relates to various uses of the iron sponge so made.
摘要:
PROCESS FOR BORATING METALS IN WHICH THE METAL IS TREATED WITH A PULVERIZED BORATING AGENT CONTAINING A FLUOBORATE AND/OR BORON FLUORIDE AS AN ACCELERATING AGENT.
摘要:
In a process for preparing silicon tetrachloride from silicon carbide and/or silicon carbide containing mixtures with hydrogen chloride the improvement which consists in carrying out the reaction in the presence of cobalt chloride or nickel chloride or a mixture of both at temperatures ranging from 400*C to 1,000*C.