超纯纳米ZrO2粉体的制备及控制其团聚的措施

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1、浙江大学理学院硕士学位论文超纯纳米ZrO<,2>粉体的制备及控制其团聚的措施姓名：郝秀宁申请学位级别：硕士专业：分析化学指导教师：王敏20081201浙江大学硕士学位论文AbstractThenanotechnologyisanewadvancedsubjectwhichwasdevelopedfromtheendof1980stothe1990s．Thepeople’cognitionofworldhasbeengreatlyexpandedandreinforcedbythetechnology．Peoplecanproducematerialsan

2、ddeviceatthemoleculeandatomlevelbyhenanotechnology．Recentlymoreandmoreinterestshavebeenfocusedonthenanotechnologybecauseitcaninnovateproductiontechnologyandproducenewmaterialsandnewproduction．Thefastdevelopmentofthenanotechnologywillleadtoathoroughlyinnovationcoveredallindustryfi

3、eldatthe21thcentury．Zirconiaisametaloxidematerialwhichhashi曲melting-point(2700*(2)，hi曲boilingpoint，smallcoefficientofheatconductivity，greatcoefficientofthermalexpansion，resistanttohi曲temperature，goodwear-resistance，corrosionresistance．Zirconiahasbeenusedinelectronandnewmaterialin

4、dustry，eveninthedepartmentofmetallurgy，chemicalindustry，glass，medicineandsoon．Nanozirconiahassmallparticlesizeandmayexhibitsmanydifferentpropertiesofquantumsizeeffect，surfaceeffect，andsmalldimensioncomparedtomassivematerials．Sozirconiananomaterialshavesuperphysicalandchemicalprop

5、ertiesandhavebroadapplication．Inthepaper,therecentprogressofZirconiananometermaterialshasbeenreviewed，includingproperties，application，development，and诵thanemphasisonpreparationmethod．Basedonwhich，theobjectivesandtheapplicationsprogramofthepresentstudyinthispaperareoffered．Thispath

6、wayofpreparingnanometerzirconiaisamodifiedsol-gelmethod，usingZrOCl2andoxalicacidasprimaryreactanttoobtaintheprecursorZrOC204。2H20，andthencalcinedunder600。Cfor4hourstogetzirconiapowder．Undertheoptimalcondition，thispathwayyieldfinenanometerzirconiawithaveragesizeof30nmandwitlllittl

7、evariation．SeveralstrategiesincludingaddingsurfaceactiveregentPEG6000，applyingultrasonicinalcohol，pre—calcinationdryingand浙江大学硕士学位论文grindingareharnessedtopreventhardagglomeration．Theentireprojectrequiresneitherpeculiarinstrumentnorapplicationofhightemperatureandpressure，discharge

8、snoharmfulexhaustgassuchasNH3，andcanbesu