کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1529748 | 1511991 | 2010 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Al doping effect on electrical and dielectric aging behavior against impulse surge in ZPCCYA-based varistors Al doping effect on electrical and dielectric aging behavior against impulse surge in ZPCCYA-based varistors](/preview/png/1529748.png)
Al doping effect on electrical and dielectric aging behavior against impulse surge in the ZPCCYA-based varistors was investigated. The clamp ratio (K) decreased in accordance with increasing Al2O3 content up to 0.005 mol%. A further increase in Al2O3 doping level caused K to increase. The K value at a surge current of 5 A and 10 A for the varistor doped with 0.005 mol% Al2O3 exhibited 1.49 and 1.57, respectively. Furthermore, the K value at a higher surge current of 1200 A was 2.44 for the varistors doped with 0.005 mol% and 0.01 mol% Al2O3. The best electrical and dielectric stability against impulse surge current of 1200 A was obtained at 0.01 mol% Al2O3, where %ΔE1 mA/cm2 = −1.0%, %Δα = 0%, %ΔJL = −3.9%, %Δɛ′APP = +1.4%, and %Δ tan δ = −10.5%. Conclusively, Al2O3 content was optimized at 0.01 mol% in terms of the surge absorption capability.
Journal: Materials Science and Engineering: B - Volume 170, Issues 1–3, 15 June 2010, Pages 123–128