mgal2o4纳米透明陶瓷的制备及其透明机理

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1、维普资讯http://www.cqvip.com第20卷第4期材料研究学报Vo1．20NO．42006年8月CHINESEJOURNALOFMATERIALSRESEARCHAugust2006MgAl2o4纳米透明陶瓷的制备及其透明机理齐建起·卢铁城·，。常相辉·雷牧云z黄存新z1．四川大学物理系和辐射物理及技术教育部重点实验室成都6100642．中非集团人工晶体研究院北京1000183．中科院国际材料物理中心沈阳110016摘要用传统合成金刚石用的六面顶压机，使用工艺简单的高温焙烧法得到的MgA1204纳米粉体，采用超高压烧结法分别在较低温度800—1100℃和较

2、高压强3—5GPa下尝试进行了纳米透明陶瓷的制备，得到了平均粒径约为50—75nm的MgA1204纳米透明陶瓷，发现烧结陶瓷的最佳温度为1000℃，最佳压力为4GPa．样品的密度直接决定样品的透明度，粉体的性质对透明度也有很大的影响，透明陶瓷的纳米化使其在光学透过率方面具有独特优势．关键词无机非金属材料，MgA12Oa，纳米透明陶瓷，超高压烧结，透明机理分类号TB321文章编号1005—3093(2006)04—0367—05InvestigationonpreparationandtransparentmechanismofMgA1204transparentnan

3、o-——ceramicsQIJianqiLUTiecheng，3CHANGXianghuiLEIMuyunHUANGCunxinj．DepartmentofPhysicsandKeyLaboratoryofRadiationPhysics&TechnologyofMinistryofEducation．SichuanUniversity．Chenqdu61DD2．ResearchInstituteofSyntheticCrystals，Be打口j000183．InternationalCenterforMaterialPhysics．ChineseAcademyofS

4、ciences．Shenyangjj0016SupportedbyNationa1Natura1ScienceFoundationofChinaNO．50272040，FokYingrrongEducationFoundationNO．91046andYouthScienceandTechnologyFoundationofSichuanProvinceNo．03ZQ026~)39．ManuscriptreceivedJuly12，2005；inrevisedformApri130．2006．{Ibwhomcorrespondenceshouldbeaddressed

5、，Tel：f028)85412031，E—ma订：1utiecheng@vip．sina．coinABSTRACTUsingMgAI204nano-powderobtainedbyuniquehigh-temperature--calciningmethodsastherawmateriaI，withasix—pressure--sourcemachinewhichiSusuaIlyusedfordiamondsynthesis．MgAI204transparentnano-ceramichasbeensuccessfullypreparedforthefirstti

6、mebyultrahighpressuresinteringatIOWtemperaturefrom800to1100℃underhighpressuresfrom3to5GPa．ThemeangrainsizeoftheobtainedtransparentceramiciSfr0m50tO75nm．andtheoptimaISinteringconditionshouIdbeatthetemperatureof~1000℃Underthepressureof4GPa．Thetransmittanceofceramicisafectededdominatelybyi

7、tsdensity，alsoiSaffectedbyphaseandcrystallizationoftherawpowder．andthegrainnanolizationofMgAI204transparentceramicprovidesuniqueadvantagestolighttransmission．KEYWoRDSinorganicnon—metallicmaterials，MgAI204，transparentnano-ceramic，ultrahighpres—suresintering．transparentmechanismM