高透明高掺杂Nd：YAG透明陶瓷的制备及工艺研究

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1、摘要摘要相较于单晶和玻璃等常规激光工作物质，Nd：YAG(掺钕钇铝石榴石)透明陶瓷材料具有良好的光学性能和机械强度以及稳定的物理化学性质。因此，Nd：YAG透明陶瓷引起了人们的广泛关注，在激光和发光领域得到了广泛的应用。本文用固相反应法、溶胶一凝胶法合成了Nd：YAG纳米前驱粉体。经单轴单向在lOMPa压力下预压成型后，将生坯体置于热压烧结炉中进行无压真空(10吗Pa)烧结，最终得到了性能良好的光学陶瓷。论文中系统地研究了透明陶瓷的制备及烧结工艺。研究了固相反应法、溶胶一凝胶方法制备Nd：YAG纳

2、米粉体的工艺及透明陶瓷的烧结机理；并对烧结制度控制方法进行了初步研究，最后得到了一条较为合理的烧结制度。实验中，应用了X-ray衍射仪(XRD)、扫描电镜(SEM)、紫外可见分光光度计(Uv—VIS)、能谱分析仪等测试仪器及手段对Nd：YAG超细粉体和Nd：YAG多晶陶瓷进行表征。考察了粉体成形方法和烧结制度与透明陶瓷微观形貌和透过率的关系，最后找出了影响陶瓷透光性的各种因素。关键词：掺钕钇铝石榴石固相反应法溶胶凝胶法多晶陶瓷AbstractComparedwitllsinglecrystalan

3、dglassandotherconventionallasermaterials,Nd：YAG(neodymium—dopedyttriumaluminumgarnet)transparentceramicsmaterialhasgoodopticalperformanceandmechanicalstrengthandstabilityofthephysicalproperties．Nd：YAGtransparentceramicshavebeenatopicofconcern,Luminesc

4、enceiIlthefieldoflaserandhasbeenwidelyapplied,owingtoitsgoodproperties．Inthisdissertation,Nd：YAGsuperfinepowderswereobtainedthroughsolidstatemethod，sol-gelmethod．Theas-preparedNd：YAGpowderswereuniaxiallypressedat10MPa．Thenpoly—crystalNd：YAGceramicswit

5、hgoodopticalpropertieswerefabricatedbysinteringthesamplesundervacuumatmosphere(×10-3Pa)．Thepreparationtechniquesoftransparentceramicsandthesinteringprocesseswerediscussedsystemicallyinthisdissertation．Thesolidstatereactionmethod，s01．gelmethodofprepara

6、tionofNd：YAGnano-powdersoftheprocessandtransparentceramicsinteringmechanismwerestudied；thenthesinteringsystemcontrolmethodwaspreliminarystudiedandfinallygotamorereasonablesinteringsystem．TheX-raydiffractionmeter(XRD)，thescanningelectronmicroscope(SEM)

7、，theultravioletobviousspectrophotometer(ov-vls)，thespectrumanalyzersandothertestinstrumentsandmeanswereusedtocharacterizetheNd：YAGultrafmepowderandNd：YAGpolycrystallineceramicsintheexperiment．Therelationshipbetweenpowderformingmethods，sinteringsystema

8、ndtransparentceramicmicro-morphologyandtransmittanceWasfullystudied．Finallyidentifiedthefactorsinfluencethetransparentoftheceramics．Keywords：Nd：YAGsolidstatemethodSol·-Gelpoly·crystalceramics创新性声明本人声明所呈交的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，除了文中特别