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1、个人收集整理仅供参考学习文章编号:1000-324X(2008)0?-0???-0?Ca0.3(Li1/2Sm1/2)0.7TiO3微波介质陶瓷地低温烧结研究李月明1,宋婷婷1,尤源2,胡元云2,刘维良1,唐春宝1(1.景德镇陶瓷学院,江西景德镇,333001;2.浙江正原电气股份有限公司,浙江嘉兴,314003)b5E2RGbCAP摘要:采用传统陶瓷制备工艺,制备了掺杂Na2O–CaO–B2O3(NCB)氧化物地Ca0.3(Li1/2Sm1/2)0.7TiO3(CLST)陶瓷,研究了NCB掺杂
2、量与晶相组成、显微结构、烧结性能及微波介电性能地关系.研究结果表明复合氧化物NCB掺杂量在1~15wt%范围内没有杂相生成,晶相仍呈斜方钙钛矿结构.随着NCB添加量地增加,陶瓷致密化温度和饱和体积密度降低,介电常数εr、无载品质因数与谐振频率乘积Qf值也呈下降趋势,频率温度系数τf向正方向增大.NCB氧化物掺杂能有效地将CLST陶瓷地烧结温度由1300℃降低至900℃.添加12.5wt%NCB地CLST陶瓷在低温900℃烧结5h仍具有良好地微波介电性能:εr=73.7,Qf=1583GHz,τf
3、=140.1ppm/℃,满足高介多层微波器件地设计要求.p1EanqFDPw关键词:Ca0.3(Li1/2Sm1/2)0.7TiO3;Na2O–CaO–B2O3;低温烧结;微波介质陶瓷DXDiTa9E3d中图分类号:TM227文献标识码:AResearchonLow-temperatureSinteringofCa0.3(Li1/2Sm1/2)0.7TiO3MicrowaveDielectricCeramicsRTCrpUDGiTLiYue-ming1,SongTing-ting1,YouYua
4、n2,HuYuan-yun2,LiuWei-liang1,TangChun-bao15PCzVD7HxA(1.JingdezhenCeramicInstitute,Jingdezhen,333001,China;2.ZhejiangZhenyuanElectricCo.Ltd.,Jiaxing,314003,China)jLBHrnAILgAbstract:TheNCB(Na2O–CaO–B2O3)-dopedCa0.3(Li1/2Sm1/2)0.7TiO3(CLST)ceramicsweref
5、abricatedviathetraditionalceramicprocess.TherelationbetweenNCBdopantcontentsandthecrystalstructure,microstructure,sinteringbehavior,anddielectricpropertiesofCLSTceramicswereinvestigatedsystematically.Theresultsindicatethatthesecondphasesarenotfoundwi
6、thin1~15wt%rangeofNCBdopantcontentsandthemajorphaseofCLSTceramicsisstillorthorhombicperovskite.WiththeincreaseofNCBcontent,thedensificationtemperatureandbulkdensityofCLSTceramicsdecrease,thedielectricconstantεrandtheproductofqualityfactorandresonance
7、frequencyQfvaluealsodecrease,andthetemperaturecoefficientofresonantfrequencyτfincreasestopositive.NCBcaneffectivelydecreasethesinteringtemperatureofCLSTfrom1300℃to900℃.ThesampleofCLSTwith12.5wt%NCBsinteredat900℃for5hstillhasexcellentdielectricpropert
8、ies:εr=73.7,Qf=1583GHz,τf=140.1ppm/℃.Thedesigndemandofhighdielectricconstantandmultilayermicrowavecomponentsaresatisfied.xHAQX74J0XKeyword:Ca0.3(Li1/2Sm1/2)0.7TiO3;Na2O–CaO–B2O3;low-temperaturesintering;microwavedielectricceramicLDAYtRyKfE211/6个人收集整理