ELECTRICALLY CONDUCTIVE OXIDE SINTERED COMPACT, MEMBER FOR ELECTRICAL CONDUCTION, GAS SENSOR, PIE

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In the present invention, an electrically conductive oxide sintered compact contains a crystal phase having a perovskite type oxide crystal structure represented by the compositional formula REaCobCucNidOx (here, RE denotes a rare earth element, a+b+c+d = 1, and 1.25 ≤ x ≤ 1.75). The coefficients a, b, c and d satisfy the relationships 0.474 ≤ a ≤ 0.512, 0.050 ≤ b ≤ 0.350, 0 < c < 0.250 and 0.050 ≤ d ≤ 0.350.