静态高温高压法合成立方氮化硼单晶的生长界面表征.pdf

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1、第12卷第3期显微与测量灾燥造援12晕燥援3圆园15年6月Microtechnique&MeasurementJune圆园15CharacterizationofGrowthInterfaceforCubicBoronNitrideSynthesizedbytheStaticHighTemperature-highPressureCatalyticMethodXUBin，ZHANGWen，LVMei-zhe,GUOXiao-fei，SUHai-tong（SchoolofMaterialsScienceandEngineering,ShandongJianzhuUniv

2、ersity,Ji’nan250101,China）Abstract:Cubicboronnitride(cBN)wassynthesizedinLi3N-hBNsystemathightemperature-highpressure(HPHT).Bycharacterizingexperimentalsamples,itwasfoundthatphasestructuresinthegrowthinterfacewerecomprisedofhBN,cBNmicro-particlesandLi3BN2,largecBNsinglecrystalgrowedbyan

3、nexingcBNmicro-particlesaroundthegrowthinterface,andtheelectronicstructuresof23boronandnitrogenatomswerechangedfromsptospgraduallyinthegrowthinterface.TheresultsshowedthatcBNwasmorelikelytobetransformeddirectlyfromhBNwithLi3BN2asthecatalystunderthecourseofcBNformationatHPHT.Keywords:cub

4、icboronnitride；growthinterface；statichightemperature-highpressure；HRTEM；XPS；formationmechanism静态高温高压法合成立方氮化硼单晶的生长界面表征许斌，张文，吕美哲，郭晓斐，苏海通（山东建筑大学材料科学与工程学院，山东济南250101)摘要：在高温高压下的氮化锂-六方氮化硼(Li3N-hBN)体系中合成立方氮化硼(cBN)单晶，通过表征实验样品发现，生长界面处的相结构是由hBN、cBN微颗粒和硼氮化锂(Li3BN2)组成的，大颗粒cBN单晶通过吞并生长界面周围的cBN微颗粒进行生长

5、，生长界面中的硼和氮原子的电子结构从sp2逐渐转变为sp3，根据结果推断，高温高压状态下，在立方氮化硼合成过程中，cBN更有可能是在Li3BN2的催化下由hBN直接转变而来。关键词：立方氮化硼；生长界面；静态高温高压法；HRTEM；XPS；生长机理中图分类号：O643.3文献标识码：A文章编号：1812-1918（2015）03-0050-070Introductionmaterialafterdiamondwithavickershardnessofabout50GPa.Itshowsagoodstabilityagainstoxida-Cubicboronnitr

6、ide(cBN)isthesecondhardesttionupto1573K,excellentchemicalstabilityathightemperature,largethermalconductivity,widestoptical收稿日期：201缘-0员-2750第3期纳米科技灾燥造援12晕燥援3圆园15年6月晕葬灶燥泽糟蚤藻灶糟藻驭Nanot藻糟澡灶燥造燥早赠June圆园15bandgapwithinIII-Vsemiconductors,andtheop-ortheirnitridesascatalysts.ThecBNsynthesizedwith

7、[1]-[3]portunitytobedopedbothn-andp-type.Be-lithiumnitride(Li3N)iswidelyusedbecauseofitscauseoftheseandothersuperiorproperties,cBNhasregularcrystalshapeandsuitableparticlesize.Soinbecomeapromisingfunctionalmaterial.thispaper,thecBNsinglecrystalsaresynthesizedItisnecessarytoobta