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Features of the Real Structure of Lanthanum Hexaboride Polycrystalline |
| ZHENG Shu-Qi1;MIN Guang-Hui1;ZOU Zeng-Da1;YU Pu-Lian1;HAN Jian-De1;Y. B. Paderno2 |
| 1College of Materials Science and Engineering, Shandong University, Ji’nan 250061
2Institute for Problems of Materials Science, National Academy of Sciences of Ukraine, Kiev 03142, Ukraine
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| Cite this article: |
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ZHENG Shu-Qi, MIN Guang-Hui, ZOU Zeng-Da et al 2001 Chin. Phys. Lett. 18 942-943 |
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Abstract 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.
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| Keywords:
61.72.Ff
81.70.Ex
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Published: 01 July 2001
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| PACS: |
61.72.Ff
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(Direct observation of dislocations and other defects (etch pits, decoration, electron microscopy, x-ray topography, etc.))
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81.70.Ex
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(Nondestructive testing: electromagnetic testing, eddy-current testing)
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