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Features of the Real Structure of Lanthanum Hexaboride Polycrystalline

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摘要 The Microstructure of lanthanum hexaboride(LaB6)polycrystalline has been studied by using transmission electron microscope.This shows that the ideal LaB6 polycrystalline can be obtained by sintering ingots at the temperature of 2273 K for holding time of 120 min in Ar pressure of 800 Torr,where the ingots are formed by pressing LaB6 powder at room temperature at a pressure of 0.4-0.5 GPa.The particles in LaB6 polycrystalline hardly bind;there are only a few of pores at the joint parts of three particles and a few of impurities exist in some pores.The sintering process for fabricating LaB6 polycrystalline is analysed and the formation of the pore and the impurities are studied from the point of surface tension.
作者 ZHENG Shu-Qi MIN Guang-Hui ZOU Zeng-Da YU Pu-Lian HAN Jian-De Y.B.Paderno 郑树起;闵光辉;邹增大;于普涟;韩建德;Y.B.Paderno(College of Materials Science and Engineering,Shandong University,Ji’nan 250061;Institute for Problems of Materials Science,National Academy of Sciences of Ukraine,Kiev 03142,Ukraine)
出处 《Chinese Physics Letters》 SCIE CAS CSCD 2001年第7期942-943,共2页 中国物理快报(英文版)
基金 Supported by the High-Technology Foundation of Shandong(GXB991).
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