| 摘要 |
PROBLEM TO BE SOLVED: To provide a coating rotor electrode by which electric wave noise can be reduced greatly. SOLUTION: In a coating rotor electrode 5, a ferroelectric substance layer 3 is arranged on the surface part of a rotor electrode 1, and the ferroelectric substance layer is constructed of one kind or not less than one kind of precursor ceramics polymer and two or more kinds of inorganic ferroelectric fillers, which consist of a mixture system comprising a barium titanate whisker with a mean fiber length of 5μm or more and with a fiber diameter of 1.0μm or less and barium titanate particle powder with a particle diameter of 5μm or less.
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