| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for forming an electrode of a PTC element, capable of reducing interface resistance between a PTC element assembly and an electrode, the PTC element being manufactured using a semiconductor porcelain composition in which a part of Ba of BaTiOis substituted with Bi-Na.SOLUTION: A method for forming an electrode of a PTC element includes a step of preparing a semiconductor porcelain composition represented by a composition formula: [(Bi-Na)(BaR)][TiM]O(where R represents at least one selected from among rare earth elements including Y, M represents at least one selected from among Nb, Ta and Sb) while the x, y and z satisfy relationships of 0<x≤0.30, 0≤y≤0.020 and 0≤z≤0.010, coating an electrode paste on the semiconductor porcelain composition, performing heat treatment to remove a binder in the electrode paste, and then performing baking treatment. The baking treatment is performed in a condition at 500°C or above and 700°C or below for 5 minutes or more and 30 minutes or less in a non-oxidizing atmosphere with an oxygen concentration of 2% or less. |
