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1、中文摘要本實(shí)驗(yàn)利用掃描電子顯微鏡、金剛石單顆?？箟簭?qiáng)度測定儀等測試設(shè)備，系統(tǒng)地研究了在陶瓷剛玉磨料的制備過程中原料的初始濃度、氨水的加入方式、球磨時(shí)間、添加劑的成分、配比和加入量、燒結(jié)溫度對磨料的顯微結(jié)構(gòu)、單顆?？箟簭?qiáng)度的影響。實(shí)驗(yàn)結(jié)果表明，原料的初始濃度、氨水的加入方式、球磨時(shí)間、添加劑的成分、配比、加入量、燒結(jié)溫度對磨料的性能均有很大的影響。磨料的晶粒尺寸隨原料初始濃度的升高而增大，而單顆粒抗壓強(qiáng)度則隨原料初始濃度的升高而降低；氨水加入速度過快導(dǎo)致磨料的晶粒尺寸變大，致密性變差，單顆?？箟簭?qiáng)度下降；球磨時(shí)間并非越長越好，采用合理的球磨時(shí)問，既能提
2、高磨料性能，又能提高生產(chǎn)效率；選取合適的添加劑成分能有效地控制晶粒的大小，提高磨料的致密性；適當(dāng)?shù)奶砑觿┡浔炔坏梢杂行У卮龠M(jìn)氧化鋁燒結(jié)，抑止晶粒的長大，同時(shí)可以提高磨料的單顆?？箟簭?qiáng)度；加入適量的添加劑能夠細(xì)化晶粒，提高磨料的單顆?？箟簭?qiáng)度；燒結(jié)溫度對磨料的性能影響較為明顯，采用合適的燒結(jié)溫度才能得到較佳性能的氧化鋁磨料。關(guān)鍵詞：陶瓷剛玉，磨料，制備工藝，性能ABSTRACTInthepreparationprocessofceramiccorundumabrasives，theeffectsoftheinitialconcentrationofr
3、awmaterials，theaddingmethodsoftheammonia，ballmillingtime，differentadditivesandtheircomposition,additionamountandsinteringtemperatureonthemicrostructure，singleparticlecompressivestrengthoftheabrasivesw．ereresearchedsystematicallyviascanningelectronicmicroscope(SEMlanddiamondsing
4、leparticlecompressivestrengthtester．Theresultsshowedthatthepropertiesoftheabrasiveswereinfluencedremarkablybytheinitialconcentrationofthematerials，theballmillingtime，theaddingmethodsofammonia，additivesandtheircomposition，additionamountandsinteringtemperature．Withtheincreaseofth
5、einitialconcentrationofrawmaterials，thegrainsizeofabrasivesincreased，buttheabrasive’Ssingleparticlecompressivestrengthreduced．Theexcessiveaddingspeedoftheammoniawouldinducetherapidgrowthofabrasivegrains，thepoorcompactnessoftheabrasivesandthedeclineofsingleparticlecompressivestr
6、ength．Longerballmillingtimedidn’tconsequentiallyresultinbeRerpropertiesofabrasives，properballmillingtimewouldnotonlyimprovethepropertiesofabrasives，butincreasetheproductionefficiency．Thegrainsizecouldbecontrolledeffectivelyandthecompactnessoftheabrasiveswouldbeimprovedgreatlyby
7、choosingsuitableadditives．Properadditivescompositionwouldpromotethesinteringofalumina，restrainthegrowthofgrainsandimprovethesingleparticlecompressivestrengthofabrasives．Thegrainscouldbefreedandthesingleparticlecompressivestrengthofabrasivescouldbeincreasedbyaddingappropriateamo
8、untofadditives．Sinteringtemperaturehadobviouseffectont
