PLZT柠檬酸盐前驱体的热分解

19883JournalofInorganieMaterialsVol.3,No.1Mareh,1988PLzT()7.9/70/30PLZTPLZT500450~500,;;,;,,,AndertonBaythounl!Lacoo3Lacrosrcoo:MnoSrMnO3,Anderton,PLzTPLzTPLzT,7.9/70/30PLzT,:,,pH1,,,PTpH4.04.29599.5%-----__.87525,1987611283,PLZT7.9/70/30PLzT21pHTablelConeentr.tionandPHofthecitratesolutionsNameofeitteSOlutionsRaWmaterialsWeightofrawmaterials(g)Weightofeitricaeid(g)Water(ml)!SolutonpHCitrate501ionsofPbPbo9~10CittesolutionsofZrZrOC12SH:06~7CitratesolutionsofTi(CH,O)Ti5~6CitratesolutlonsofLaLa,10006~72.T.beZChemic.l.oalysisothePrecursorPLZTCitrieaeidNH,+Water3,%1569%53%15%63%1.1(DTA)3,13,500()(),,()Co07H,(2ce07H+,02,12CO:+8Hzo),,212,3T.ble3Celourandweiht1055oftheprecuoratdifferenttempor.ture-Temperature()f20}250{250350{450450,lhCOlourofPreeursorwhite}whitebr0WnbrOWnblaCkgreygreyyel.and10Weight1055(%){o6433,1:PLzO!10QZ1000300400500600TemPerature())200300400500600700800Trature(.C)1Fig1DTAeurveofthePreeursorinoPensystem2F192.DTAeurveofthePreursorinelosedsystem,00.C400.C4,I_,500.C400(),n”U!1023Fig.3.DTAeurveofthePureeitieaeidin~~~-20,c--,OPensystem1.Dehydration;2.Melt;3.Pyrolysis4.Oxidaion4XF19.4.XraydiffraetionPatternsofthePyrolytieProduetformedatdifferenttemPeraturefor4h,,2.4xl450lh,,4PLzT,5004hPLzTJO;5(6004h)Fig5.TEMPhotograPhofPLZTProdueedbyPyrolyzingeitrateat600CCfor4hFig6.600h)TEMphotograPhofPLZTProdueedbyProlyzingeitrateat800for4h450~500PLzT[JPLzT850,PLzT,,PLZT,,,PLzT4,,56600004h8004h,,,3.;PLzT,,6,,(EDS)18x24mZ,1000,4(900)Toble4.Ho.ogeityofthepyrolytproduet.t900PboZrO2!1|^reanalyse,jPoin:nalyses59.07%6021%59.18%5943%La:03796%745%711%713;26.73%25.72%2673%27.29%625%6.62%697%615%l:PLzjl49004h(4La:03TIO:),PLZT,,,500450500PLzT,PLZT,EDsPLzTPzT,:,,[1Anderton,D.J.[2Baythoun,M.5.andSale,F.R.:PowderMetallurgy,(1)1979:14Sale,F.R.:Jour.Mater.Sei.,17,1982:275734]Brown,L.M.a:,ndMazdiyasni,K.5.:G.and:10(1)1982:JOUr.Amer.6929Ceram.Soe.,.,(5)55(11)1972:5415Jll:,[6Li,C.E.Ni,H.Y.Yin,2.(4)1985:W.:Trans.J.Br.Ceram.Soe1983:155PyrolysisofPLZTCitratePreeursorZhuangHe,LICesenadYinZhiwen(ShanghaiInstituteofCeramies,AeademiaSiniea)AbstCtThesolidamorphous7.9/70/30pLzTeitratepreeursorhasbeenpreredbyusingthemetbodofthealeoholdehydrationofeitratesolutions.Pure,ultrafineandaetivePLZTpowderseanbeobtainedbyPyyzingthePrecursor.InthisPaper,theehemicalreaetionsoccurredduringthePyrolytieproeessandtheehemiealhomoge-neityofthePyrolytieProduethavebeenstudied.TheresultsobtainedshowthatthePyrolysisofthePreeursorwillfinishat500CC,andtheerystallinetemperatureofthepyrolytieProduet15from450CCtoSOOCC.ThePyrolytieProduethasagoodeom-,tioDalhomogeneityKwords:Preeursor,501gel,Crystallinetemperature,Pyrolysis