Preparation of finely-divided refractory powders of groups III-V metal borides, carbides, nitrides, silicides and sulfides
Single-crystal hexaborides and method of preparation
Preparation of rare earth borides Patent #: 4999176
ApplicationNo. 276664 filed on 11/28/1988
US Classes:423/263, RARE EARTH COMPOUND (AT. NO. 21, 39, OR 57-71)423/289Binary compound (e.g., boride, etc.)
ExaminersPrimary: Niebling, John F.
Assistant: Bolam, Brian M.
Attorney, Agent or Firm
International ClassC01F 017/00
Foreign Application Priority Data1987-11-26 FR
AbstractThe rare earth borides, e.g., the tetraborides and hexaborides of lanthanum, cerium and praseodymium, are directly prepared by heating/reacting a mixture of at least one rare earth chloride and elemental boron at an elevated temperature, e.g., a temperature ranging from 1,200° to 1,500° C.