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Preparation and Properties of (Ce 0.4 La 0.2 Pr 0.2 Nd 0.2 )B 6 Single‐Crystal by the Optical Float‐Zone Traveling Solvent Technique
Author(s) -
Wang Pan,
Zhang Jiuxing,
Yang Xinyu,
Ning Shuyu,
Zhang Jingwen,
Wang Yan,
Li Zhi
Publication year - 2017
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201700159
Subject(s) - single crystal , thermionic emission , diffractometer , materials science , crystallography , crystal (programming language) , diffraction , crystal structure , analytical chemistry (journal) , seed crystal , x ray crystallography , optics , chemistry , physics , computer science , programming language , electron , chromatography , quantum mechanics
Abstract The high quality (Ce 0.4 La 0.2 Pr 0.2 Nd 0.2 )B 6 single‐crystal has been successfully prepared by the optical float‐zone traveling solvent technique. The crystal structure and performance of the (Ce 0.4 La 0.2 Pr 0.2 Nd 0.2 )B 6 single‐crystal obtained at different rates are characterized by using XRD, X‐ray single‐crystal diffraction, rotating target X‐ray Diffractometer, X‐ray Laue diffraction, SEM and thermionic emission equipment etc.. The results show that the as‐grown single‐crystal with the uniform composition has a cubic structure with the lattice size of 4.143 Å. The optimal mechanical and thermionic emission properties belong to the (Ce 0.4 La 0.2 Pr 0.2 Nd 0.2 )B 6 single‐crystal prepared at growth rate V = 7 mm/h. The values of 53.3 A/cm 2 in the current density at 1873 K under the applied voltage of 4 kV and 29.26 GPa in Vickers hardness indicate that (Ce 0.4 La 0.2 Pr 0.2 Nd 0.2 )B 6 single‐crystal is a promisingly thermionic emission material.