ZnO压敏陶瓷的研究现状-豆柴文库

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ZnO压敏陶瓷的研究现状
摘要
本文主要介绍了目前关于ZnO压敏陶瓷的研究现状，包括其制备工艺、性能表现及应用等方面。针对ZnO压敏陶瓷在电子器件和传感器等领域的广泛应用，对其未来的发展趋势进行了展望。
关键词：ZnO压敏陶瓷，制备工艺，性能表现，应用，发展趋势
Introduction
Zincoxide(ZnO)varistors,alsoknownasZincoxide(ZnO)ceramicsurgeabsorbers,arenewtypesofsemiconductorceramicsthathaveemergedinrecentyears.Asthecorecomponentofsurgearresters,ithasthecharacteristicsofhighvoltagewithstandcapability,fastresponse,andlargeenergyabsorptioncapacity.Inrecentyears,thedownstreamindustriesrepresentedbyelectronicinformationhaveundergonetremendouschanges,andtherapiddevelopmentofZnOvaristorshasalsodriventheoverallgrowthofthisindustry.ThispapermainlyintroducesthecurrentresearchstatusofZnOvaristors,includingpreparationtechnology,performance,andapplicationprospects,aimingtoprovideareferenceforsubsequentresearchanddevelopmentinthisfield.
PreparationtechnologyofZnOvaristors
Atpresent,thepreparationmethodsofZnOvaristorsincludesolid-statereactionmethod,sol-gelmethod,andhydrothermalsynthesismethod.Amongthem,thesolid-statereactionmethodisthemostwidelyusedandmaturemethodinthepreparationofZnOvaristors.ThebasicprincipleistomixmetaloxidepowderscontainingZnOwithcertainadditivesandthensinteredunderspecificconditions.TheadditivesareusuallyCoO,MnO2,NiO,andotheroxides.Thesol-gelmethodcanobtainauniformandfine-grainedZnOpowderbyadjustingthepreparationprocessparameters,butitsdisadvantagesarelowyieldandhighcost.Thehydrothermalsynthesismethodischaracterizedbysimplepreparationstepsandlowcost,butitisnoteasytocontrolthepurityandmorphologyofthefinalproducts.
PerformanceofZnOvaristors
TheperformanceofZnOvaristorsismainlyrelatedtoitselectricalandmicrostructuralproperties.Theelectricalpropertiesrefertothevaristorvoltage,leakagecurrent,andnonlinearcoefficient,whilethemicrostructuremainlyincludesgrainsize,grainboundary,anddefectstructure.ThegrainsizeoftheZnOvaristorsisusuallylessthan10μm,andthesmallerthegrainsize,thebettertheelectricalproperties.Theadditionofappropriateamountsofmetaloxidescanformadensegrainboundary,whichcaneffectivelyimprov