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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Synthesis and characterization of NiO doped beta-Al2O3 solid electrolyte
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Synthesis and characterization of NiO doped beta-Al2O3 solid electrolyte

机译：NiO掺杂β-Al2O3固体电解质的合成与表征

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摘要

The beta-Al2O3 solid electrolyte with NiO doped and Li2O stabilized is synthesized via the solid state reaction method, which is starting with alpha-Al2O3, Li2CO3, Na2C2O4 and Ni(NO3)2 center dot 6H(2)O as the raw materials. Effects of the NiO content on the mechanical and electrical performances are studied by means of thermogravimetry/differential scanning calorimetry (TG/DSC), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Meanwhile, the relative density, the bending strength and the electrical properties of the prepared samples are also measured in this paper. The beta-Al2O3 solid electrolyte with the appropriate amount of NiO has a higher beta ''-Al2O3 phase content and uniform microstructure with dense and plump grains. However, the excess NiO doping can lead the grain to molten state and make the pores become larger. It deteriorates the ionic conductivity. When the NiO content of the beta-Al2O3 solid electrolyte is 0.25 wt%, the beta ''-Al2O3 phase content is 98.91%, the microstructure is uniform and compact, the relative density is 98.73% of theoretical density, the bending strength is up to 296 MPa and the ionic conductivity can reach 0.066 S cm(-1) at 350 degrees C. (C) 2016 Elsevier B.V. All rights reserved.
机译：通过固态反应方法合成了掺杂有NiO并稳定了Li2O的β-Al2O3固体电解质，该方法以α-Al2O3，Li2CO3，Na2C2O4和Ni（NO3）2中心点6H（2）O为起始原料。通过热重/差示扫描量热法（TG / DSC），X射线衍射（XRD）和扫描电子显微镜（SEM）研究了NiO含量对机械和电性能的影响。同时，还测量了所制备样品的相对密度，弯曲强度和电性能。含适量NiO的β-Al2O3固体电解质具有更高的β''-Al2O3相含量和均匀的微观结构，具有致密而饱满的晶粒。但是，过量的NiO掺杂会导致晶粒进入熔融状态并使孔变大。它会降低离子电导率。当β-Al2O3固体电解质的NiO含量为0.25 wt％时，β''-Al2O3相含量为98.91％，微观结构均匀致密，相对密度为理论密度的98.73％，弯曲强度提高。到296 MPa，离子电导率在350摄氏度时可以达到0.066 S cm（-1）。（C）2016 Elsevier BV保留所有权利。

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