根据LiB化合物的六方结构模型， 计算了热 电池阳极材料Li-B合金随B含量变化的理 论密度曲线。 采用阿基米德方法分别测量了含24%(摩尔分数)B的Li-B合金反应完全并经冷 挤压后的样品和 未经第二次放热反应中间样品的密度， 综合分析了以往不同研究者所测量的结果。 结果表 明 ， 反应充分并消除合金中孔隙后合金的实验密度值与理论计算值一致， 以往造成实验偏差 的主要原 因是样品中存在孔隙。 中间样品的密度与Li-B元素混合计算密度一致， 它支持在第一次 反应和第二次反应之间B熔化在Li中的观点。
The theoretical density of Li-B alloy vs bor on content was calculated according to a hexagonal structure model of LiB comp ound. For the 24%(mole fraction) B Li-B alloy， the densities of the specimen f ully reacted and cold extruded an d the specimen without second exothermic reaction were measured， respecti ve ly. Several experimental results of previous different researchers were discusse d. It is shown that after full reaction and running out the porosity i n the alloy， the experimental density of the alloy agree with that of theoreti ca l calculation. The main reason that causes large deviations in density measureme nt is the porosity in the specimen. The density of the specimen without second e xothermic reaction is almost the same as that of theoretical calculation accordi ng to the Li-B element mixture， it supports a view point that after first rea ction and before the second reaction， the element B is solved into liquid Li.
参考文献
| [1] | 邓护群;黄伯云;黄培 云 .热电池阳极材 料锂硼合金研究进展[J].功能材料,1997,28(02):127. |
| [2] | Winchester C S.The LAN/FeS2 thermal battery system[A].,1982:23. |
| [3] | Sanchz P;Belin C;Crepy G et al.Preparation and characteriza tion of lithium-boron alloys[J].Journal of Materials Science,1992,27:240. |
| [4] | Wang F E .An unusual phenomenon in the formation of Li5B4 compo und alloy[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1979,10:343. |
| [5] | Dalleck S;Ernst D W .Thermal analysis of lithium-boron alloys[J].Journal of the Electrochemical Society:Solid State Science and Technology,1979,126:866. |
| [6] | Mitchell M A;Sutula R A .The density,electrical resistivity a nd Hall coefficient of Li-B alloys[J].Journal of the Less-Common Metals,1978,57:161. |
| [7] | Sorokin V P;Gavrilov P J .Preparation of lithium-boro n compound[J].Russian Journal of Inorganic Chemistry,1977(22):595. |
| [8] | LIU Zhi-jian;QU Xuan-hui;HUANG Bai yun et al.Crystal struct ure and morphology of a new LiB compound[J].Journal of Alloys and Compounds,2000,311:256. |
| [9] | LIU Zhi-jian;LI Zhi-you;DUAN Wei et al.Preparation of Li -B alloy and study of its microstructure and discharge characteristics[J].Journal of Materials Science,2000,16(05):581. |
| [10] | Wang F E;Mitchell M A;Sutula R A et al.Crystal structure stud y of a new compound Li5B4[J].Journal of the Less-Common Metals,1978,61:237. |
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