Combustion synthesis of calcium phosphate bioceramic powders.pdf

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1、JournaloftheEuropeanCeramicSociety20(2000)2389±2394CombustionsynthesisofcalciumphosphatebioceramicpowdersA.CuÈneytTas*,1DepartmentofMetallurgicalandMaterialsEngineering,MiddleEastTechnicalUniversity,Ankara06531,TurkeyReceived6January2000;receivedinrevisedform10May2000;accepted14May2000Abstrac

2、tCalciumphosphate(hydroxyapatiteandtri-calciumphosphate)bioceramicscloselyresembling,inchemicalcomposition,thosefoundinvivoinhumanboneshavebeensynthesizedbyusingnovelsyntheticbody¯uidsolutionsviatheself-propagatingcom-bustionsynthesis(SPCS)method.PowdercharacterizationwasperformedbyXRD,ICP-AE

3、S,FTIRandSEM.#2000ElsevierScienceLtd.Allrightsreserved.Keywords:Apatite;Body¯uid;Ca3(PO4)2;Combustionsynthesis;Hydroxyapatite1.Introductionformedphaseafterhigh-temperature(1100±1300C)sintering.SynthesisofHAinneutral5orslightlyacidicCalciumhydroxyapatite(HA:Ca(PO)(OH)),themedia8isknowntobeamo

4、recomplicatedanddicult10462majorinorganicphaseofbones,isamemberofthetask.Thesynthesisofbi-phasicmixturesofHAand``apatite''family.However,biologicalapatites,whichTCPhasalsobeenachievedbyaqueouscoprecipita-comprisethemineralphasesofcalci®edtissues(enamel,tion.11dentinandbone),dierfrompureandsyn

5、theticallyThesyntheticbody¯uid(SBF)preparedinaccordproducedcalciumhydroxyapatite(HA)instoichio-withthechemicalanalysisofhumanbody¯uids,withmetry,composition,crystallinity,andalsoinotherionconcentrationssimulatingthehumanbloodplasma,physicalandmechanicalproperties.1Minorelements,was®rstusedbyK

6、okuboandhisco-workers,12ÿ14tosuchas,Na+,Mg2+,K+,acidphosphate(HPO)2-,provethesimilaritybetweeninvitroandinvivobeha-4Clÿ,andFÿ,andsomedivalenttraceelements,suchas,viorsofcertainglass-ceramiccompositions.Tas15,16hasSr,Ba,Cu,Zn,orFe,arealsoassociatedwithbiologicalrecentlysynthesizednanosizedHApo

7、wders,undertheapatitesandmaybeseenassubstituentsintheapatitebiomimeticconditionsof37CandpH=7.4,byusingstructure.Ontheotherhand,thesmallerpresenceofsyntheticbody¯uids(SBF),insteadofwater,astheresorbablecalciumphosphatesinhumanbones(suchprecip