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I声明本人郑重声明我所呈交的学位论文是我个人在导师指导下进行的研究工作及取得的研究成果。尽我所知,除了文中已经标明引用的内容外,本论文不包含其他个人或集体已经发表或撰写过的研究成果,也不包含本人或其他人在其它单位已申请学位或为其它用途使用过的成果。与我一同工作的同志对本研究所做的所有贡献均已在论文中作了明确的说明并表示了致谢。申请学位论文与资料若有不实之处,本人承担一切相关责任。论文作者签名:日期:关于学位论文使用授权的说明本人完全了解西安建筑科技大学有关保留、使用学位论文的规定,即:学校有权保留并向国家有关部门或机构送交学位论文的复印件和电子版,允许论文被查阅和借阅;学校可以公布学位论文的全部或部分内容,可以采用影印、缩印或者其它复制手段保存学位论文。(保密的论文在论文解密后应遵守此规定)论文作者签名:导师签名:日期:……………………………………………………………………………………………………………………….本人授权中国科学技术信息研究所、中国学术期刊(光盘版)杂志社等单位将本学位论文收录到有关“学位论文数据库”之中,并通过网络向社会公众提供信息服务。同意论文提交后滞后:□半年;□一年;□二年发布。论文作者签名:导师签名:日期:注:请将此页附在论文首页。西安建筑科技大学硕士学位论文氢氧化铝微粉制备研究摘要氢氧化铝微粉因其颗粒细,又具有阻燃自熄性能,在塑料、橡胶等复合材料中填加后使产品具有阻燃消烟效果,而且抗漏电、耐电弧、耐磨性能增强,因而被广泛用在电缆、绝缘子、热塑材料、电力电器设备、橡胶、塑料等行业中。本文在对国内外先进产品性能的综合分析的基础上,开展了对微粉氢氧化铝性能优化系统的研究。研究表明利用气流分级技术能有效的去除氢氧化铝微粉填料中的粗颗粒,微粉填料2μm的牛顿分级效率是82.72%。生产工艺容易控制,成本低,产品-500目粒度为99.5%。采用低电导率的蒸馏水作为产品的洗涤用水,在洗涤流程中引入立式压滤机降低滤饼水份,使微粉产品尽可能少吸附可溶性电解质,能有效地降低产品电导率,由大于100us/cm降低到34.3us/cm。用磷酸作为改性剂溶质的干法改性工艺可提高微粉的热稳定性。通过对氢氧化铝微粉合成、深加工工艺的研究,形成H-WF-1、H-WF-2、H-WF-3三个品种,产品的质量档次达到了国外先进水平。研究成果在工业生产应用推广后,提高了产品质量,增加了产品品种,并使之系列化,从而使产品的销售量大增,国内外市场占有份额得以提高,为企业带来良好的经济收益。关键词:氢氧化铝;粒度;电导率;改性论文类型:应用研究专业:冶金工程姓名:冯晓明导师:宋永辉副教授西安建筑科技大学硕士学位论文ProductionTechnologyofFineAluminumTrihydroxideAbstractSuperfinealuminumhydroxideisappliedtomakingelectronicmaterial.itscharacter,usage,andtechnologicflowwasintroducedinthispaper.Asitswonderfulvirtue,itwaswidelyusedinmanyfields,suchascable,insulator,thermoplastic,wiring,rubber,plastic,etc.Accordingtothegeneralanalysisaboutthecapabilityofoverseaadvancedproductandthefeedbackfromuser,theoptimizedsystemofSuperfinealuminumhydroxidewasstudied.1)Byusingthetechniqueofairflowgrading,removingcoarseparticlesinSuperfinealuminumhydroxide,whichcanimprovinggranularitydistributing.Testproved,UsingjetClassificationtechnologycaneffectivelyremovethealuminumhydroxidepowderpackingofcoarseparticles,Newtongradeefficiencyof2μmpackingpowderwas82.72%.Bythis,itwaseasytocontroltheproductionprocess,reducecosts,andgranularityof500meshproductcanreach99.5%.2)Studiedoptimizationofproductperformance,lowelectricalconductivityofdistilledwaterasaproductofthewashingwaterinthewashingprocessintoverticalfilterpressdown,lowcakemoisture,soproductswithminimalpowdersolubleelectrolyteabsorption,caneffectivelyreduceproductconductivity,thereismorethan100us/cmreducedto34.3us/cm.Solutewithphosphoricacidasamodifierofdrypowdermodificationprocesscanincreasethethermalstability.Withthemodifieddrypowderbywetthandrymodificationtechnologyisnotonlysimpleequipment,lowinvestment,lowcostmodification,andthereisnowastewatertreatment;drypracticalityandeconomyarebetterthanwet.3)Researchingnewproductdevelopmenttestaccordingtomarket.Throughsynthesis,deepprocessingtechnology,formedH-WF-1,H-WF-2,H-WF-3threevarieties,thequalityofproductshavereachedinternationaladvancedgradelevel.Afterthepopularizationofthisresearchresultinindustrialproduction,itcanimprovingtheproductquality,increasingproductvariety,andmakingtheseries,whichgreatlyincreasedsalesandmarketshareofourproductsbothindomesticandabroad,andbringeconomicbenefitsforcompany.KeyWords:finealuminumtrihydroxide;grainsize;specificconductivitycoated;flameretardantClassificationofthepaper:ApplicationresearchSpecialty:MetallurgicalEngineeringName:FengXiaomingInstructor:SongYonghui西安建筑科技大学硕士学位论文I目录1文献综述.........................................................................................................................11.1引言..................................................................................................................11.2氢氧化铝微粉的性质与用途...........................................................................21.2.1物理化学性质........................................................................................21.2.2阻燃机理.................................................................................................41.2.3用途.........................................................................................................51.2氢氧化铝微粉的制备工艺...............................................................................61.2.1微乳液法................................................................................................61.2.2溶胶-凝胶法............................................................................................71.2.3有机铝水解法.........................................................................................71.2.4均匀沉淀法............................................................................................71.2.5机械粉碎法............................................................................................71.2.6铝酸钠溶液分解制备氢氧化铝微粉.....................................................81.3课题来源和主要内容......................................................................................82实验原料、设备及方法................................................................................................92.1实验原料...........................................................................................................92.2仪器、设备......................................................................................................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