首页|Effect of Zr-addition on Electric Degradation Characteristics of ZnO Varistors
Effect of Zr-addition on Electric Degradation Characteristics of ZnO Varistors
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
Trans Tech Publications Ltd
ZnO varistors of the excellent tolerance characteristics for electrical degradation were made by adding Bi_2O_3-MnO_2-Co_3O_4-Cr_2O_3-SiO_2-Sb_2O_3-NiO in ZnO. The tolerance characteristics for electrical degradation were evaluated by changing amount of ZrO_2-additive. The evaluation methods are voltage-current characteristics, X-ray diffraction, scanning electron microscope, and energy dispersion X-ray spectroscopy. Monoclinic and tetragonal ZrO_2 and the compounds originated in Zr were observed at both grain boundaries and triple points. Moreover, the compounds originated in both Zr and Sb improved the tolerance characteristics for electrical degradation. On the other hand, especially monoclinic ZrO_2 deteriorated the tolerance characteristics for electrical degradation. It is one key factor of the improvements of the tolerance characteristics for electrical degradation that the mobility of oxide ions or interstitial Zn~(2+) ions was hindered by forming the compounds contained Zr, Sb, Si, and, Bi atoms.
ZnO varistorstolerance characteristics for electrical degradationZrO_2-additivespinel particles
NETL
NSTL
Trans Tech Publications Ltd
