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Microstructure and varistor properties of V-doped ZnO nanoparticles prepared by co-precipitation method

机译：共沉淀法制备V掺杂ZnO纳米粒子的微观结构和压敏性能

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摘要

V-doped ZnO nanoparticles (0.5, 1, 1.5 and 2 at.% V) for varistor application have been prepared by co-precipitation method. XRD, TEM, EDS, SEM and FTIR have been employed to characterize the as-synthesized V-doped ZnO nanopowders and varistor samples. Pure and V-doped ZnO nanoparticles have a hexagonal wurtzite structure and the (002) diffraction peaks position of V-doped ZnO shift toward smaller value of diffraction angle compared with pure ZnO powders. The results confirm that the V ions were well incorporated into ZnO crystal lattice. Simultaneously, V doping also inhibited the growth of particles and the size decreased from 45.1755 to 29.5137 nm with the increase in doping concentration from 0 to 2 at.%. The microstructure of 2 at.% V-doped ZnO varistor consists mainly of ZnO grains with Zn_3(VO_4)_2 as the minority secondary phase at 900 ℃. The varistor ceramics has a sintered density of 5.55 g/cm~3 corresponding to 96.2 % of its theoretical density, with breakdown voltage of 4100 V/cm and nonlinear coefficient of ~7.2.
机译：通过共沉淀法制备了用于压敏电阻的V掺杂的ZnO纳米粒子（0.5、1、1.5和2 at。％V）。 XRD，TEM，EDS，SEM和FTIR已被用来表征合成后的V掺杂ZnO纳米粉和压敏电阻样品。纯和V掺杂的ZnO纳米颗粒具有六方纤锌矿结构，与纯ZnO粉末相比，V掺杂的ZnO的（002）衍射峰位置朝着较小的衍射角偏移。结果证实，V离子很好地结合到ZnO晶格中。同时，V掺杂也抑制了颗粒的生长，并且随着掺杂浓度从0at％增加到2at。％，其尺寸从45.1755nm减小到29.5137nm。 2 at。％V掺杂的ZnO压敏电阻的微观结构主要由900℃时以Zn_3（VO_4）_2为少数次生相的ZnO晶粒组成。压敏陶瓷的烧结密度为5.55 g / cm〜3，相当于其理论密度的96.2％，击穿电压为4100 V / cm，非线性系数为〜7.2。

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  • 来源
    《Journal of materials science》 |2016年第2期|1777-1782|共6页
  • 作者

    Zhong-Yin Zhao; Mao-Hua Wang; Han-Ping Zhang;

  • 作者单位

    School of Petrochemical Engineering, Changzhou University, Changzhou 213164, People's Republic of China,Huaide College, Changzhou University, Changzhou 213164, People's Republic of China;

    School of Petrochemical Engineering, Changzhou University, Changzhou 213164, People's Republic of China,Huaide College, Changzhou University, Changzhou 213164, People's Republic of China;

    School of Petrochemical Engineering, Changzhou University, Changzhou 213164, People's Republic of China,Huaide College, Changzhou University, Changzhou 213164, People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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