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1、ResearchArticle研究報告MicrostructureandCurrent-voltageCharacteristicsof(ZnO-CuO)VaristorSysteminthePresenceofAdditiveOxides,Cr2O3,Bi2O3 andNiO在壓敏電阻氧化鋅-氧化銅內中添加氧化鉻,氧化鉍,氧化鎳對顯微結構與電流-電壓特性的改變S.E.Mansour, O.A.Desouky, S.M.Negim and W.A.Kamil作者：馬來西亞聖英大學(Universi
2、tySainsMalaysia)翻譯：晟銘電子技術長&達安企業科學顧問-邱耀弘博士，國立台灣科技大學機械所材料科學組畢業ABSTRACT摘要Themicrostructure,electricalpropertiesanddensityofZnO-basedvaristorceramicswithdifferentCuOcontentpreparedbyballmillingandsinteredat(900~1200°C)wereinvestigated.Thenonlinearcoeffici
3、ent(α)anddensityincreasewithincreasingCuOcontent.Thepresenceofaliquidphasefacilitatedthesinteringprocessanddevelopedatomicallyinterfaces,uniformintergranularphaserequiredfornon-linearconduction.ThepresenceofCr2O3 ingroup(II)absentofgraingrowth(inhibit
4、ionofgraingrowth)andenterinsolidsolutionwithZnO. X-raydiffraction analysisofsinteredsamplesrevealsnoformationofnewphases,butlatticeconstantsofthephaseswerechangedaftersintering.利用球磨法添加不同重量的氧化銅到現有的氧化鋅為基礎的壓敏電阻陶瓷系統中，然後燒結(900~1200°C)後觀察其顯微結構,電子特性以及密度。氧化銅的
5、量增加造成非線性係數(α)與陶瓷體密度的值增加。由於燒結過程液相出現在晶界，其提供原子進出的便利通道、均勻的晶界相，這是非線性傳導的要求。實驗發現添加氧化鉻該第2組(II)的晶粒不成長(被抑制了)同時與氧化鋅發生固溶反應。以X光繞射分析燒結後的試片沒有發現新的相，但在燒結後的相其晶格常數改變。Howtocitethisarticle如何引用本文章S.E.Mansour,O.A.Desouky,S.M.NegimandW.A.Kamil,2011.MicrostructureandCurrent-v
6、oltageCharacteristicsof(ZnO-CuO)VaristorSysteminthePresenceofAdditiveOxides,Cr2O3,Bi2O3 andNiO. CurrentResearchinChemistry,3:29-48.DOI: 10.3923/crc.2011.29.48 URL: http://scialert.net/abstract/?doi=crc.2011.29.48Received: November10,2010; Accepted: No
7、vember14,2010; Published: April22,2011INTRODUCTION簡介Varistorsarematerialswithnonlinearcurrent-voltagecharacteristics.Theyareusedbothasprotectingdevicesagainstovervoltagesinelectronicandindustrialequipmentsandassurgearrestors(Souzaetal.,2003).Commercia
8、lvaristorsusedinprotectionsystemsarebasedonSiC(siliconcarbide)orZnO(zincoxide).SiC-basedvaristorshavelownonlinearitycoefficients(α=5)where α isthenonlinearityconstantdefinedbytherelation:I=KVα,whereIiscurrent,VisvoltageandKisaproportionalityco
