zinc oxide varistor
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Author(s):  
Wei Cao ◽  
Zihao Liu ◽  
Xiumin Chen ◽  
Shanqiang Gu ◽  
Shuai Wan ◽  
...  

2021 ◽  
Vol 16 (1) ◽  
pp. 1-7
Author(s):  
Shaifudin Muhamad Syaizwadi ◽  
Mohd Sabri Mohd Ghazali ◽  
Wan Mohamad Kamaruzzaman Wan Mohamad Ikhmal ◽  
Mohd Anuar Muhamad Syahmi Hazim ◽  
Wan Abdullah Wan Rafizah ◽  
...  

Application of ZnO varistor at low voltage has increased significantly due to the high demands of low-voltage electronics with high nonlinearity characteristics and low leakage current. The varistor ceramics were developed via solid-state reaction method and the resultant sample was analyzed by means of SEM, EDS and XRD. The nonlinearity characteristics of ZnO varistor ceramics for different contents of cobalt oxide (Co3O4) at a given barium titanate (BaTiO3) amount were analyzed based on the J-E characteristics measurement. The increased value of nonlinear coefficient (α) equal to 4.8 was exhibited by the sample made with 12 wt.% BaTiO3 additive. As the concentration of dopant (Co3O4) incorporated was increased from 0.5 to 1.5 wt.%, the varistor voltage limit decreased from 8.9 V/mm to 7.0 V/mm, respectively. Additionally, the barrier height increased from 0.88 to 0.98 eV for 0.0 wt.% to 1.0 wt.% of Co3O4 concentration, respectively. The highest α of 7.2 was obtained at 0.5 wt.% Co3O4 and decreased with further doping content due to to the reduction of barrier height caused by the variation of electronic state at the grain boundaries.


Author(s):  
Zongke Hou ◽  
Yingying Zheng ◽  
Men Guo ◽  
Yao Wang ◽  
Zhuolin Cheng ◽  
...  

2020 ◽  
Vol 6 ◽  
pp. 462-468
Author(s):  
Qian Wang ◽  
Ruonan Zhang ◽  
Chenjie Ji

2020 ◽  
Vol 46 (14) ◽  
pp. 22134-22139
Author(s):  
Yuwei Huang ◽  
Men Guo ◽  
Jianying Li

2019 ◽  
Vol 92 (9) ◽  
pp. 1232-1238
Author(s):  
O. G. Gromov ◽  
E. L. Tikhomirova ◽  
Yu. A. Savel’ev

2019 ◽  
Vol 789 ◽  
pp. 948-952 ◽  
Author(s):  
Pengfei Meng ◽  
Xiaolei Zhao ◽  
Zhiyao Fu ◽  
Jinbo Wu ◽  
Jun Hu ◽  
...  

Author(s):  
S Muhamad Syaizwadi ◽  
S Siti Noradilah ◽  
M G Mohd Sabri ◽  
W A Wan Rafizah ◽  
K Syara ◽  
...  

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