制备高纯氟化钡和微乳液合成纳米氟化钡的过程的的研究

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1、AbstractBaF2hasspecialphotoluminescencecharacteristicsasnewscintillatingcrystalandgoodopticalmatrixmaterial．ThehighpurityBaF2waspreparedwithammoniumfluorideandbariumchlorideasrawmaterialinaqueoussolution．ItWasstudiedonthechangesofthestructuralparametersofW／O

2、microemulsionsystemsCTAB／alcohol／n-heptane／waterwimtheincreasingofWoorcarboatomicnumbersofstraightchainalcoh01．BaF2andBaF2：Ce3+nanoparticleswerepreparedfromW／Omicroemulsionsystems吼婚

3、n-butanol／n-heptane／water．AnewtechnologyWasthepreparationofthehighpurityBaF2

4、fromammoniumfluorideandbariumchloride．TheoptimumoperationalconditionsforthepreparationofBaF2werereactiontemperature25℃，reactiontime60min,initialmassconcentrationofbariumchloride10％，n(NI-hF)：n(BaCl2)--2．2，theratioofwashingamounttofiltercakeamount=10：1，washed3

5、times．ThepurityofBaF2Wasupto99％．Theprocedurehasshortflowrouteandgoodeconomicbenefits．DilutionWasusedtomeasureandcalculatethestructuralparametersofW／OmicroemulsionsystemsCTAB／alcohol／n-heptane／wateratdifferentmoisturecontentsanddifferentalcoh01．IntheW／Omicroe

6、mulsionsystemsCTAB／alcohol／n-heptane／water,谢mtheincreaseofmoisturecontent，theradiusofinnerwaterdropletrtw，theeffectiveradiusofparticle＆，thelengthofinterfacelandtheaverageaggregationnumberofsurfactantngraduallyincreased．Butthetotalinterracialareaofdispersedph

7、aseAdandthetotalparticlecountNdgraduallydecreasedinthissystems．Whenn-ButanolWasthecosuffactant，thesystemof-△Gc0“linearlydecrease．WhenmediumchainalcoholandlongchainalcoholWasthecosurfactant，thesystemof_△Gc0斗idecreasedandthenincreased．Asthecarboatomicnumbersof

8、straightchainalcoholincreased，theradiusofinnerwaterdropletRw,theeffectiveradiusofparticle＆，thelengthofinterface1，theaverageaggregationnumberofsurfactantnandGibbsFreeEnergy-△Gkgraduallyincreased．ButthetotalparticlecountNdandthetotalinterracialareaofⅡdispersed

9、phase～graduallydecreased．BaF2andBaF2：Ce3+nanoparticleswerepreparedfromW／OmicroemulsionsystemsCTAB／n-butanol／n-heptane／water．BaF2andBaF2：Ce3+nanoparticleswerenallosphericalparticles，andthediamete