Mechanism of ionic conduction in oxy and hydroxyapatite structures

International Journal of Inorganic Materials Pub Date : 2001-11-01 Epub Date: 2001-11-19 DOI:10.1016/S1466-6049(01)00054-X

A Bouhaouss , A Laghzizil , A Bensaoud , M Ferhat , G Lorent , J Livage

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引用次数: 33

Abstract

Knowledge of the ionic transport properties of apatites is important in uderstanding their physical and chemical properties. This report reviews and updates results obtained on the alternating current impedance characteristics of synthetic apatites. The possible mechanism of the conduction properties of various oxy and hydroxyapatites are discussed on the basis of the structural data. It is deduced that charge carrying protons are responsible for the observed conductivities in M₁₀(PO₄)₆(OH)₂. The H⁺ migration between the electoattractive ion (O²⁻) to give molecular H₂O in matrix channels. However, in some vanadium oxyapatites containing lanthanum Ca_10−xLa_x(VO₄)₆O_1+x/2, the ionic conductivities observed are explained by the frequent hopping of oxygen ion along the c axis of the hexagonal matrix. The study of the conductivity relaxation shows structural aspects of these electrolytes.

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氧和羟基磷灰石结构中的离子传导机制

了解磷灰石的离子传输性质对理解其物理和化学性质是很重要的。本文综述和更新了合成磷灰石的交流阻抗特性的研究结果。根据结构数据，讨论了各种氧羟基磷灰石导电性能的可能机制。推导出携带电荷的质子是M10(PO4)6(OH)2中所观察到的电导率的原因。H+在吸引离子(O2−)之间的迁移使分子在基质通道中形成H2O。然而，在某些含镧Ca10−xLax(VO4)6O1+x/2的钒氧磷灰石中，离子电导率可以用氧离子沿六方基体c轴的频繁跳变来解释。电导率弛豫的研究显示了这些电解质的结构方面。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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International Journal of Inorganic Materials

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