| 简介 |
PROBLEM TO BE SOLVED : To achieve an improvement of high-temperature acceleration life (HALT) of insulation resistance (IR) and breakdown voltage (VB), in a reduction resistant dielectric ceramic composition including a perovskite type dielectric ceramic as a main component.
SOLUTION : The dielectric ceramic composition comprises a main component including a compound having a perovskite type crystal structure and being represented by the general formula ABO3 (wherein A is one kind or more elements selected from Ba, Ca, Sr and Mg, B is one kind or more elements selected from Ti, Zr and Hf, and [A]/[B] (molar ratio) is 0.990≤[A]/[B]<1.03), a first sub-component such as MgO or the like, a second sub-component that is a sintering aid, a third sub-component including an oxide of a rare earth metal R (wherein R is at least one kind selected from Y, Dy, Tb, Gd and Ho), a fourth sub-component including MnO, and a fifth sub-component that is an oxide of Re (rhenium), wherein the ratio of each sub-component against 100 moles of the main component is characterized in that the first sub-component is 0.1-3 moles, the second sub-component is 0.1-12 moles, the third sub-component is 0.01-10 moles, the fourth sub-component is 0.05-1.0 mole, and the fifth sub-component is 0.01-1.0 mole.
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