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1 IntroductionChemicalreactionamongmetalsandmetalswithceramicsunderhigh energymechanicalmilling (MM)havebeenwide lystudied[1~ 3] .Untilnow ,solidreactionsbetweenmetaloxidesunderMMhavebeenhardlystudied .ZnFe2 O4isakindofspinelferrite ,whichisgenerallysynth