SEMICONDUCTOR CERAMIC COMPOSITION, METHOD FOR PRODUCING SAME, PTC ELEMENT AND HEAT GENERATING MODU

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There is provided a semiconductor ceramic composition in which a portion of Ba of BaTiO3 is substituted by Bi-Na, which exhibits an excellent jump characteristic while reducing room temperature resistivity and which also reduces room temperature resistivity and exhibits small change with time. A semiconductor ceramic composition which is represented by a composition formula of [(Biθ-Naδ)x(Ba1-yRy)1-x]TiO3 (where R is at least one kind of rare earth elements), in which x, y, θ and δ satisfy 0

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