-
公开(公告)号:US4022872A
公开(公告)日:1977-05-10
申请号:US631241
申请日:1975-11-12
申请人: Donald R. Carson , Calvin B. Holden
发明人: Donald R. Carson , Calvin B. Holden
IPC分类号: C04B35/626 , B01J12/00 , B01J12/02 , C01B17/20 , C01B21/06 , C01B21/064 , C01B21/068 , C01B21/072 , C01B31/30 , C01B33/06 , C01B35/02 , C01B35/04 , H05H1/00 , H05H1/32 , H05H1/34 , H05H1/40 , H05H1/42
CPC分类号: H05H1/00 , B01J12/002 , B01J12/02 , C01B21/064 , C01B21/068 , C01B21/072 , C01B31/30 , C01B33/06 , C01B35/04 , H05H1/32 , H05H1/3405 , H05H1/42 , C01P2006/12 , H05H1/40 , H05H2001/3468 , Y10S422/906 , Y10S423/10
摘要: Helical flow of hot plasma gas, e.g., hydrogen gas, produced by a gas vortex stabilized plasma arc is cancelled by introducing attenuating gas, e.g., hydrogen gas, into the hot plasma gas in a manner such that the attenuating gas assumes a vortical direction opposite to the helical flow of the hot plasma gas. The resulting gas stream is well-collimated. The well-collimated plasma gas stream is used in the preparation of finely-divided refractory metal and metalloid carbides, borides, nitrides, silicides and sulfides. Reactants for the preparation of the aforementioned refractory powders are introduced into the collimated plasma gas stream. The reaction is conducted in the gas phase within a reactor and solid, finely-divided refractory powder removed from the reactor.
摘要翻译: 通过将气体涡旋稳定等离子体电弧产生的热等离子体气体(例如氢气)的螺旋流动通过将衰减气体(例如氢气)引入热等离子体气体而被消除,使得衰减气体呈现相反的涡旋方向 到热等离子体气体的螺旋流。 得到的气流是准确的。 准直的等离子体气流用于制备细小的难熔金属和准金属碳化物,硼化物,氮化物,硅化物和硫化物。 用于制备上述耐火材料粉末的反应物被引入准直等离子气体流中。 反应在反应器内的气相中进行,并从反应器中除去固体,细分的耐火粉末。