Improvement of the Sintering and Dielectric Characteristics of Surface Barrier Layer Capacitors by CuO Addition

概要

論文の詳細を見る
Calcined (Ba_<0.8>Sr_<0.2>)(Ti_<0.9>Zr_<0.1>)O_3 (BSTZ) with added CuO is used as an improved material with which to fabricate surface (or reduction-reoxidation) barrier layer capacitors (BLCs). The CuO-containing BSTZ appears to heve less temperature, frequency, and bias dependence of the dielectric characteristics and a lower sintering temperature (1325℃ versus 1390℃) as compared to BSTZ without CuO. For the same annealing conditons, for example, annealing at 1000℃ for 60 min, the effective dielectric constant of CuO-added BSTZ (sintering at 1325℃) is larger than that of BSTZ without CuO (sintering at 1390℃). The addition of MnO accelerates the annealing process, causing the semiconductive ceramics to reoxidize into dielectric materials within 30 min. CuO addition can lead to an important competitive merit for BSTZ dielectrics, especially in the fabrication of surface BLCs with an easily controllable fabrication process to give stable dielectric characteristics.
社団法人応用物理学会の論文
1996-03-15