High-energy ball milling process에 의해 제조된 Ga₂0₃첨가 Ce_(0.8)Gd_(0.2)O_(1.9) 세라믹스의 전기적특성 = Electrical Property of Ga₂0₃-added Ce_(0.8)Gd_(0.2)O_(1.9) Ceramics Prepared by the High-Energy Ball Milling Process

다국어 초록 (Multilingual Abstract)

The electrical property of Ga₂0₃-added Ce_(0.8)Gd_(0.2)O_(1.9) ceramics was investigated. The gadolinia-doped ceria powders were prepared by the high-energy ball milling process using commercially available powders. Dense Ce_(0.8)Gd_(0.2)O_(1.9) ceramics with 97% of the theoretical density could be obtained by sintering of the milled mixture with 0.5 mol% Ga₂0₃ addition at 1250℃ for 5 h. Total conductivity of 0.5 mol% Ga₂0₃-added specimen showed the maximum conductivity of 2.88x10^(-3) Ω^(-1)·cm^(-1) at 500℃. Pure Ce_(0.8)Gd_(0.2)O_(1.9) ceramics needed to be sintered at 1600℃ in order to obtain an equivalent theoretical density and conductivity. Introduction of high-energy ball milling process and Ga₂0₃ doping had a good effect on the electrical conductivity of gadolinia-doped ceria.