| 简介 |
PROBLEM TO BE SOLVED : To obtain a dielectric ceramic composition having superior reduction resistance at firing, excellent temperature dependence of capacitance after firing, and an enhanced accelerated life of insulation resistance. SOLUTION : The dielectric ceramic composition comprises a main component containing barium titanate, a fourth subcomponent containing an oxide of R1 (R1 is at least one kind selected from a first element group composed of rare earth elements having an effective ionic radius of less than 108 pm when having a coordination number of nine), a fifth subcomponent containing an oxide of R2 (R2 is at least one kind selected from a second element group composed of rare earth elements having an effective ionic radius of 108-113 pm when having a coordination number of nine). COPYRIGHT : (C)2004, JPO |
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