Electrical behavior against current impulse in ZnO–Pr6O11-based varistor ceramics with terbium addition

Pulse aging behavior of ZnO–Pr6O11–CoO–Cr2O3–Dy2O3 varistor ceramics with sintering time

“…The V c is defined by the drop voltage between electrodes of the sample when the specified pulse-current flows through the sample. The higher pulse-current leads to the higher V c because the resistance in the nonlinear region shows still as a low value [19][20][21]. It can be seen that the higher breakdown voltage leads to the higher clamping voltage.…”

“…Therefore, the electrical stability against a pulse-current is technologically very important in zinc oxide varistors. However, studies on the effect of the sintering process on the surge clamping characteristics and electrical behavior of the varistors against a surge with high energy have been slightly reported [18][19][20][21][22][23]. In this work, the effects of the sintering time on pulse aging behavior of the ZnO-Pr 6 O 11 -CoO-Cr 2 O 3 -Dy 2 O 3 varistor ceramics were addressed and some significant results were obtained.…”

Impulse Degradation Behavior of ZPCCYE Varistors with Y2O3/Er2O3Ratio

“…The V c is defined by the drop voltage between electrodes of the sample when the specified impulse-current flows through the sample [18,19]. The higher impulse-current leads to the higher V c , because the resistance in the nonlinear region exists still as a low value [18][19][20][21][22][23]. Table 2 …”

“…The electronic equipment and the electrical power systems to be protected from various impulses significantly demand a high stability of varistors to enhance reliability. Therefore, the electrical stability against an impulse-current is technologically very important in ZPCC-based varistors [18][19][20][21][22][23]. These varistor ceramics are limited to 5-components.…”

Microstructure and Electrical Properties of ZPCCYT Varistor Ceramics

“…Nahm et al reported that Zn-Pr-Co-Cr (ZPCC)-Rare earth oxide (R = Er, Y, Dy, etc. )-based varistor ceramics have highly nonlinear properties and high stability against various stresses [12][13][14][15][16][17][18][19][20][21][22]. These varistor ceramics are based on 5 components in ceramic composition.…”