Multilayer Varistor with Low-Voltage Characteristics from ZnO + ACoO3 Ceramics (A = Ca, Sr and Ba)
The non-linear properties provided from ZnO + ACoO3 ceramics (A=Ca,Sr and Ba) and their application to MLCV for ESD-suppression were studied. Their ceramics showed excellent non-linear I-V properties in lower voltage region. Especially, ZnO + SrCoO3 ceramics intrinsically had about 20 % lower Vgb than those of Pr and Bi-based ZnO varistors. MLCV using ZnO + SrCoO3 ceramics demonstrated extremely low-voltage property of V1mA= 5.6 V with maintaining excellent non-linearity and reliability performance against ESD.
Chazono Hirokazu, Fujihara Shinobu, Katayama Keiichi, Masumoto Hiroshi, Mizoguchi Teruyasu, Osada Minoru, Shinozaki Kazuo and Takeda Hiroaki
E. Koga et al., "Multilayer Varistor with Low-Voltage Characteristics from ZnO + ACoO3 Ceramics (A = Ca, Sr and Ba)", Key Engineering Materials, Vol. 485, pp. 249-252, 2011