火焰辅助的喷雾热分解法制备纳米氧化钇.pdf

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1、第55卷第3期化工学报Vol.55N32004年3月JournalofChemicalIndustryandEngineeringMarch2004妥、妥妥妥妥、妥妥研究快报妥NANOSIZEDY妥、妥妥妥妥、妥2O3POWDERSMADEBYFLAME-ASSISTEDSPRAYPYROLYSISFANYiCun!范益群"#FENGJun!冯君"#XUNanping!徐南平"andS~IJun!时钧"

2、aterialsorientedChemicalEngineeringofJiangsuProuince,Nanjing210009,Jiangsu,China>KeyWordsnanoparticle,premixedflame,flamespraypyrolysis,yttriaCLCnumberTG036DocumentcodeAArticleID0438-1157<2004>03-0512-02phaseWithoutanypostprocessingandhenceINTRODUCTIONmaterialsofhighpuritycanbeobtained.Further,Na

3、noparticlesynthesisinflameisanattractivetheproductparticlesareofnarroWsizedistribution[1]andeffectivemethod.Nanoparticlecanbeandsmallparticlesize,Whicharetheimportant[5]synthesizedinflamebyeithergas-to-particlecharacteristics.Themorphology,sizedistribution[2-4]conversionorparticle-to-particleconv

4、ersion.andcompositionofproducednanoparticlescanbeSinceprecursorsingas-to-particleconversionmustaccuratelycontrolledthroughvaryingprocessbegases,itisreCuiredthatthecorrespondedliCuidparameterssuchasflametemperature,typeofprecursorshavehighvolatility.IncomparisonWithprecursorandoxidant,residencetim

5、eofgas-to-particleconversion,precursorsinparticle-particles,presenceofadditivesoradditionalto-particleconversionarelesslimited,varyingelectricfield.fromflammableorganometallicsolutionstovariousaCueousmetalsaltsolutionssuchasmetal1EXPERIMENTALchlorides,metalnitratesandmetalacetates.TheInthepresent

6、Work,nanosizedyttriaisprecursormaterialisatomizedandcarriedbyagassynthesizedusingaCueousyttriumnitrateasintotheflame.GenerallyspeakingorganometallicprecursorinapremixedC~4/airflame.AcompoundsaremoreexpensiveWhileaCueousschematicset-upfortheexperimentsisgiveninmetalsaltsolutionsarereadilyavailable

7、.Fig.1.AirasoxidantisdividedintotWostreams,ThereforeflamespraypyrolysisusingaCueousoneactsascarriergasWhichisusedtoatomizemetalsaltsolutionsasprecursorshasgreateraCueousyttriumnitrate,theotherdeliveredintoadvantages.th