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1、西安建筑科技大學(xué)碩士學(xué)位論文嚷霧熱解法合成鎂鑷尖晶夏緞米粉末茲割餐與表征專業(yè)：材料學(xué)磺究生：張小會導(dǎo)師：蔣明學(xué)教授摘要本文用噴霧熱解法合成了Mg加204納米粉末，設(shè)計(jì)并制作了乙烘和氧氣助燃的噴霧熱解裝置，用此設(shè)備合成了一次粒徑為10—60納米、團(tuán)聚顆粒直徑為1802晦米的球形失晶石粉寒。爰X-ray、SEM幫激光越發(fā)分援鉸對尖翕夏羧末進(jìn)行’歹表，玨。通過研究得到如下結(jié)論：1．水，乙醇，硝酸鎂和硝酸鋁適宜作為合成尖晶石的起始物，因?yàn)橥ㄟ^試驗(yàn)發(fā)現(xiàn)氯化甥系統(tǒng)對設(shè)鐮的腐蝕陡較大；硫酸鹽系統(tǒng)愆到的羚末較耀：害毒乙醇豹系統(tǒng)褥筏的耱末斃沒有乙醇熬系統(tǒng)得羈納粉末
2、蓬松，易收祭。2．影響粉末一次粒徑和顆粒粒徑的因索很多。隨酒精和水的比值的減小，粒徑和顆粒粒徑都增加；糠徑隨溶液濃度的減小，先減小后增加；一次粒徑隨篷力的變化，變化綴，j、，瞧隧壓力鞫漉羹茲增翔，鞠聚體增多、鬻聚粒徑增大。3．從產(chǎn)率上來看，壓力和流量對產(chǎn)率的影響最大。隨壓力和流髓的增加，產(chǎn)窀明顯增大。4．囂蔻怒潮瓣耪束冗乎黎為球形，毽頹蔽越徑分露蒗圈}￡較寬。這也是唆霧熱薅粉末的典型特點(diǎn)。麓繼字：噴舅熱解納米尖晶石合成與表征西安建筑科技大學(xué)碩士學(xué)位論文TheSynthesisandCharacterizationoftheNano-SpinelP
3、owdersbySpray—PyrolysisSpecility：MaterialSciencePost-graduate：ZhangXiaohuiInstructor：Prof．JiangMiugxueAbstractMgAl204nano—powderswerepreparedbythespray-pyrolysismethod．Anethane—oxygen—assistedspray-pyrolysisequipmentwasdesignedandconstructed，bywhichthesphericalpowdersofcrysta
4、llinewith10-60nmindiameterandagglomerationparticlewith180nmindiameterwereprepared．MgAl204nano-powderswerecharacterizedbyX·raydiffraction，SEM，lasergranularityanalysisequipment．Thefollowingconclusionshavebeenapproachedfromthisstudy：1Water,alcohol，magnesiumnitrateandaluminumnitr
5、atearemorefeasiblestartmaterialsforpreparingthespinel．Otherwisewefoundfromtheexperimentsthatthechloridesystemerodesseriouslytheequipment，andthatthepowdersfromthesulfatesystemaretoolargeinsize．Therefore，onlythepowdersfromthesystemcontainingalcohol，comparedwiththepowdersfromthe
6、systemwithoutalcoh01．a(chǎn)IeflemcierandC．a(chǎn)nbecollectedmoreeasily．2SeverMfactorsaffectthecrystallinesizeandtheparticlesizeofthepowders．Astheratioofalcoholtowaterdescends，bothofthemrise．Asthesolutionconcentrationofnitratesdescends，thecrystallinesizefirstlydescendsandthenrises．Theno
7、zzlepressurebringsforthlittleaffluenceonthecrystallinesizeofthepowder,buttheelevatedpressurecanenlargethequantityandthesizeoftheagglomeration．3Thenozzlepressureandthesolutionfluxsetupamagnificentinfluenceonthepowderyield，andtheyieldevidentlyriseasthepressuredose．4Themostparto
8、fpowderisspheficalwithabroadparticlesizedistribution．Thisisthetypica
