(La, Ca)CrO_3のSOFCインタコネクターとしての特性(第1報) : 焼結特性, 電気伝導性

概要

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The effect of synthesis condition, such as calcining temperature and grinding, on the sinterability and electrical conductivity were investigated for the perovskite-type oxides which are expressed as (La_<1-x>Ca_<x+y>)CrO_3 (x=0-0.5, y=0-0.2). The sinterability depended on the calcium content (x), A-site excess amount (y), calcining temperature, and ball-milling procedure. (La_<1-x>Ca_x)CrO_3 (x=0.2-0.3) without A-site excess (y=0) showed high sinterability by firing in air at 1300℃, provided that the calcining temperature was above 1000℃ and that subsequent ball-milling was adopted. The electrical conductivity at 1000℃ (1273 K) also strongly depended on the calcium content (x) and A-site excess amount (y). The electrical conductivity was proportional to the calcium content (x) in the compositional range of x=0-0.4, y=0.
社団法人日本セラミックス協会の論文
2000-12-01