JP6308376B2 - 酸化物セラミックス、及びセラミック電子部品 - Google Patents
酸化物セラミックス、及びセラミック電子部品 Download PDFInfo
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Description
0<y≦0.8 ...(2)
0.8≦z≦1.2 ...(3)
ここで、μ0は真空の透磁率(=4π×10-7H/m)である。
したがって、電気磁気電流の電流密度Jを時間tで積分することにより、電気分極Pを求めることができる。
ここで、dB/dtは磁場の掃引速度を示している。
したがって、電気磁気結合係数αは、真空の透磁率μ0と電流密度Jとの積を磁界Bの掃引速度(dB/dt)で除算することにより求めることができる。
試料番号1〜21の各試料について、高抵抗測定計(米国ケースレー・インスツルメント社製、6487)を使用し、比抵抗ρを測定したところ、50MΩ・cm以上の比抵抗ρを有し、十分な絶縁性が得られたことが確認された。
ここで、真空の透磁率μ0は、4π×10-7H/mである。
2a、2b 外部電極
3a〜3c 内部電極
Claims (6)
- 少なくともSr、Ba、Co、及びFeを含有したフェライト化合物で形成された酸化物セラミックスであって、
前記フェライト化合物が、一般式[Sr 2-x Ba x Co 2-y Mg y Fe 12-z Al z O 22 ](ただし、0.7≦x≦1.3、0<y≦0.8、0.8≦z≦1.2)で表されることを特徴とする酸化物セラミックス。 - 前記yは、0.4以上であることを特徴とする請求項1記載の酸化物セラミックス。
- 電気分極の極性は、磁界の極性が反転した場合に反転しないことを特徴とする請求項1又は請求項2記載の酸化物セラミックス。
- 部品素体の表面に外部電極が形成されたセラミック電子部品であって、
前記部品素体が、請求項1乃至請求項3のいずれかに記載の酸化物セラミックスで形成されていることを特徴とするセラミック電子部品。 - コイルが、前記部品素体の透磁率に応じたインダクタンスを有するように配されていることを特徴とする請求項4記載のセラミック電子部品。
- 内部電極が、前記部品素体に埋設されていることを特徴とする請求項4又は請求項5記載のセラミック電子部品。
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