کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7990064 | 1516125 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High-quality LaxCeyPr1-x-yB6 single crystal with excellent thermionic emission properties grown by optical floating zone melting method
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The high-quality LaxCeyPr1-x-yB6 (xâ¯=â¯0.6-0.8, yâ¯=â¯0.1-0.3) single crystals have been firstly grown by optical floating zone melting method. The crystal structure, mechanical and thermionic emission properties of the as-grown single crystals were characterized by X-ray single crystal diffractometer, SEM, XRD, X-ray Laue diffraction. Subgrain-boundary-free [100] LaxCeyPr1-x-yB6 single crystal with a good crystalline integrity and homogeneous element distribution is obtained. The Lattice constant of LaxCeyPr1-x-yB6 single crystal is lower than that of the LaB6 single crystal. The lowest FWHM of 162.0 arcsec belongs to the La0.6Ce0.3Pr0.1B6 single crystal. The highest thermionic emission current density of 105.10 A/cm2 and the lowest work function of 2.562â¯eV indicate that La0.6Ce0.3Pr0.1B6 single crystal is a very promising thermionic cathode material.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 769, 15 November 2018, Pages 706-712
Journal: Journal of Alloys and Compounds - Volume 769, 15 November 2018, Pages 706-712
نویسندگان
Yan Wang, Jiuxing Zhang, Xinyu Yang, Zhongwen Zhu, Jingjing Zhao, Bin Xu, Zhi Li,