CAJ | 학술논문

六硼化镧(LaB_6)具有电子逸出功低、高熔点和高化学稳定性等优点,是制作热阴极和场发射阴极的理想发射体材料.而且在常规场发射尖锥表面涂敷一层LaB_6薄膜能够大幅度提高场发射尖锥的发射能力.为了测量LaB_6 薄膜的逸出功,采用电子束蒸发技术沉积LaB_6薄膜,并对薄膜进行了X射线衍射分析和X射线光电谱分析.通过测量薄膜的热电子发射特性和敷LaB_6薄膜的硅尖锥阵列的场致电子发射特性确定了LaB_6薄膜的逸出功,与块状LaB_6多晶材料的逸出功大体相同,说明电子束蒸发沉积技术适合于制备高纯度、低逸出功的LaB_6薄膜.
륙붕화란(LaB_6)구유전자일출공저、고용점화고화학은정성등우점,시제작열음겁화장발사음겁적이상발사체재료.이차재상규장발사첨추표면도부일층LaB_6박막능구대폭도제고장발사첨추적발사능력.위료측량LaB_6 박막적일출공,채용전자속증발기술침적LaB_6박막,병대박막진행료X사선연사분석화X사선광전보분석.통과측량박막적열전자발사특성화부LaB_6박막적규첨추진렬적장치전자발사특성학정료LaB_6박막적일출공,여괴상LaB_6다정재료적일출공대체상동,설명전자속증발침적기술괄합우제비고순도、저일출공적LaB_6박막.
Lanthanum hexaboride (LaB_6) is a low work function material. When coated on conventional field emission tips, it can significantly enlarge the field emission current of the tips. To determine its work function, LaB_6 films were deposited through e-beam deposition. It is found that the films with low oxygen content were (100) preferentially oriented. The work function was measured by thermal emission and field emission independently, yielding a value of 2.67 eV and 2.91 eV, respectively, suggesting that e-beam deposited LaB_6 films preserve the low work function of bulk LaB_6.