HERSTELLUNG VON MG2-SI UND TERNAERER VERBINDUNGEN MG2 (SI,E); (E=GE, SN, PB SOWIE UEBERGANGSMETALLE; KLEINER ALS 10 GEW.%) AUS MGH2 UND SILIZIUM SOWIE VON MAGNESIUMSILICIDFORMKOERPERN MITTELS PULS-PLASMA-SYNTHESE

DE 10117924 A UPAB: 20030121 NOVELTY - Production of magnesium silicide compounds (I) comprises reacting magnesium hydride (MgH2) and optionally one or more alkali, alkaline earth and/or rare earth metals and/or their hydrides with silicon and optionally germanium, tin, lead and/or transition metals. DETAILED DESCRIPTION - Production of magnesium silicide compounds of formula Mg(2-y)MzSi(1-x)Ex (I) comprises reacting MgH2 and optionally one or more alkali, alkaline earth and/or rare earth metals and/or their hydrides with silicon and optionally germanium, tin, lead and/or transition metals: M = one or more alkali, alkaline earth and/or rare earth metals; E = Ge, Sn, Pb and/or transition metals; x = 0-0.1; y = 0-0.2; z = 0-0.4. INDEPENDENT CLAIMS are included for: (1) a process for producing (I) comprising reacting MgH2 and optionally a M-containing compound with a silicon compound and optionally an E-containing compound by means of pulsed plasma synthesis; (2) a hybrid material comprising (I); and (3) a shaped product produced as above. USE - The products, especially magnesium silicide (Mg2Si), are useful for making low-density building materials for exposure to moderate thermal and/or mechanical stresses. ADVANTAGE - The process gives high-purity products without the oxide contamination associated with silicides made from magnesium metal.