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About: Molybdenum disilicide     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : umbel-rc:ChemicalSubstanceType, within Data Space : dbpedia.org associated with source document(s)

Type: Thingdul:ChemicalObjectchemical substanceChemical compoundyago:WikicatCeramicMaterialsyago:WikicatMolybdenumCompoundsyago:WikicatSemiconductorMaterialsyago:Abstraction100002137yago:Chemical114806838yago:Cognition100023271yago:Compound105870180yago:Compound114818238yago:Concept105835747yago:Content105809192yago:Idea105833840yago:Material114580897yago:Matter100020827yago:Part113809207yago:PhysicalEntity100001930yago:PsychologicalFeature100023100yago:Relation100031921yago:WikicatGroup6Silicideschemical compoundyago:Silicide115040129yago:Substance100019613yago:Whole105869584yago:WikicatRefractoryMaterialsumbel-rc:ChemicalSubstanceType New Facet based on Instances of this Class

Molybdenum disilicide (MoSi2, or molybdenum silicide), an intermetallic compound, a silicide of molybdenum, is a refractory ceramic with primary use in heating elements. It has moderate density, melting point 2030 °C, and is electrically conductive. At high temperatures it forms a passivation layer of silicon dioxide, protecting it from further oxidation. The thermal stability of MoSi2 alongside its high emissivity make this material, alongside WSi2 attractive for applications as a high emissivity coatings in heat shields for atmospheric entry. MoSi2 is a gray metallic-looking material with tetragonal crystal structure (alpha-modification); its beta-modification is hexagonal and unstable. It is insoluble in most acids but soluble in nitric acid and hydrofluoric acid.