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3:MaterialStudioMorphologyBFDH,CastepZrO2(101)、(110)、(002),,、、,120nm。:;;:TB383:A:1008-5548(2009)04-0045-04SimulationofCrystalSurfaceMorphologyandCalculationofMinimumandOptimumNano-particlesofZrO2ZhangLi,WuYe,XiaoBing,LiXiaodong(FacultyofMaterialsScienceandChemicalEngineering,ChinaUniversityofGeosciences,Wuhan430074,China)Abstract:BasedonBFDHlaw,theMorphologymodelofquantumchemistrysoftwareMaterialStudiowasusedtodetectthespecificcharac-teristicsoftetragonalzirconia.Andbasedonpseudopotentialmethod,Castepmodelwasusedtocalculatetheelectrondensityoftypicalthestabilitysurface(101)、(110)、(002).Thecrystalmorphologycalcula-tionresultsweretakenasafundamentalnanometercalculationwhichwasusedtocalculatethecrystalcellnumbers,theatomicity,thesurfacelayercrystalcellnumbers,thesurfacelayeratomicityanditsproportion.Theresultsshowedthattheoptimumdimensionofitsnano-particleswasabout120nm.Keywords:zirconia;nanometercrystal;crystalmorphology、、,,、、、、、、、[1-2]。,5nm~1μm,50nm[3]、10nm[4]、1μm[5],,。,,。,MaterialStudio[6]Morphology,BFDH,,,、、。1ZrO2,P42/nmc,a0=0.364nm,c0=0.527nm,α=90°,Z=2,V=0.0698nm3[7],1,ZrO2,81,,4dZr—O=0.20722nm,4dZr—O=0.24527nm,OZr[ZrO4],。ZrO2,,,(,430074):2008-10-14。:()2008()。:(1989-),,,。:15926392508,E-mail:zlcugedu@126.com。1ZrO2Fig.1CrystalstructureofZrO2Vol.15No.4Aug.200915420098CHINAPOWDERSCIENCEANDTECHNOLOGYdoi:10.3969/j.issn.1008-5548.2009.04.011··152ZrO2Fig.2MinimumdimensionofnanometerZrO222.1MaterialStudioMorphology,BFDHZrO2,fine。Castep,,ZrO2(1×1×1),(GGA),,300eV,2×10-6eV,K12,。(3×3×3)。2.2,8,1/8,,,26,a、b、c27,27,,。,,2。,c,,c500、400、300、200、100、50、35、20、10、5、2nm,。,[8]:Ntc=V/Vc,Nta=Ntc×Na,。[9]:Vc=V-V1,V1=(c-c0)3×sin60,Nsc=Vsc/Vc,Nsa=Nsc×Na,P=Nsa/Nta×100%。33.13,,(101)77.5669%,(001)8.2959%,(110)14.1371%,0.29950、0.26350、0.25739nm。4。,ZrO2,,,,7eV。(101)、(110)、(002)3,(110),,ZrO2。3.212、、、、。,、、、,。5~6、。,,、、,3ZrO2Fig.3CrystalmorphologyofZrO2(a)(101)(b)(110)(c)(002)4Fig.4Electrondensityoftypicalcrystalsurface(101)、(110)、(002)··46··3,,,,,。7。,,,,,100nm,,。3.3,1()Tab.1Dimensionofcompoundparticlesvaried()c/nm2510203550100200300400500a/nm1.38143.45356.907013.814024.174634.535169.0702138.1404207.2106276.2808345.3510b/nm1.38143.45356.907013.814024.174634.535169.0702138.1404207.2106276.2808345.3510V/nm310.0307156.72971253.837310030.698253758.2730156729.66001253837.3000100306983385360680245585156729659Ntc/143.65402244.594017956.7524143654.0188769895.75712244594.044017956752.3500143654018.8000484832313.500011492321512244594044Nta/1723.848226935.1285215481.02821723848.22609238749.085026935128.5300215481028.20001723848226581798776213790785806269351285282()Tab.2Dimensionofcompoundparticlesvaried()c/nm2510203550100200300400500V1/nm34.0073112.21161065.86849258.477351366.2914151825.84691234117.81409951609.620033675495.360079928795.1500156234529.1000/nm36.0234644.5181187.9689772.22092391.98164903.812119719.458179088.5564178110.9859316790.2543495129.8692Nsc/86.2641637.56292691.984611059.313634256.615870229.6391282410.99031132661.83102550805.38404536891.88507090971.5660Nsa/1035.16897650.755232303.8145132711.7628411079.3891842755.66853388931.884013591941.970030609664.610054442702.620085091658.7900P/%0.60050.28400.14990.07700.04450.03130.01570.00790.00530.00390.00325Fig.5RelationbetweensurfacelayercrystalcellnumberandgranularityofZrO26Fig.6RelationbetweensurfacelayeratomicityandgranularityofZrO27Fig.7RelationbetweensurfacelayeratomicityanditsproportionandgranularityofZrO2··47··15,,,,。,(8),,,,,,[10],,120nm。5BFDH,ZrO2,(101),77.5669%。CastepZrO2(101)、(110)、(002),120nm,,,。(References):[1],.[J].,2005,6(8):46-48[2],,,.[J].,2003,32(2):87-91[3],.[J].:,2007,38(1):46-50[4],.[J].,2006,20(z2):130-133[5],,,.[J].,2000(8):21-24[6]SEGALKLM,PROBERTM,PPCIKARDC,etal.First-principlessim-ulationideas,illustrationsandtheCASTEPcode[J].Phys:CondMatt,2002,14(11):2717-2743[7].[M].:,2001:595-596[8],,,.Mn(C2Cl3O2)Cl(C12H8N2)2、[J].,2008,14(2):18-21[9],.[M].:,2006:239-265[10],,.[J].,2005,24(2):139-1448Fig.8OptimumdimensionofZrO2nano-particles··48··
本文标题:ZrO-2纳米晶体形貌模拟及其最佳纳米尺度计算
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