活性化エネルギーの幅広い分布を持つガラスの電気伝導に関する理論的考察

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書誌事項

タイトル別名
  • A Theoretical Consideration on the Electrical Conductivity of Glass having a Wide Distribution of Activation Energies
  • カッセイカ エネルギー ノ ハバヒロイ ブンプ オ モツ ガラス ノ デンキ

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説明

For both ionic conduction and electronic conduction oxide glasses, the temperature coefficient of electrical conductivity is positive.<br>In the limited temperature range, conductivity is usually described by the Arrhenius equation<br>σ=σ0exp(-ΔH/RT)<br>where σ0 is constant and ΔH is the so-called activation energy for conduction. This activation energy might be thought to be different throughout the glass. Therefore, it is suggested that the Arrhenius equation does not hold for the glass having a wide distribution of activation energy. An attempt was made to consider the electrical conductivity of the glass having a wide distribution of activation energies in terms of three conduction models as follows:<br>(1) parallel model<br>ln σ=-ε0/RT+ln σ0+1/2a2R2T2.<br>(2) series model<br>ln σ=-ε0/RT+ln σ0-1/2b2R2T2.<br>(3) parallel and series coexistent model<br>ln σ=-ε0/RT+ln σ0+1/2a2R2T2-1/2b2R2T2.<br>where ε0 is the average activation energy for the conductivity of the glass, a and b are the distribution width parameter.<br>The ε0 are equal to ΔH when the glasses does not have a wide distribution of activation energy.

収録刊行物

  • 窯業協會誌

    窯業協會誌 83 (962), 473-478, 1975

    公益社団法人 日本セラミックス協会

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