FLUORIDE-ION CONDUCTION AND ITS MECHANISM IN FLUORIDE GLASSES

氟化物玻璃中氟离子传导及其机理

基本信息

  • 批准号:
    60550553
  • 负责人:
  • 金额:
    $ 1.22万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
  • 财政年份:
    1985
  • 资助国家:
    日本
  • 起止时间:
    1985 至 1986
  • 项目状态:
    已结题

项目摘要

1. Electrical conductivity measurements by ac methods were made of Al <F_3> -, Hf <F_4> -, Sc <F_3> -, Zn <F_2> -, Zr <F_4> -, Ga <F_3> -, Fe <F_3> - and In <F_3> -based fluoride glasses. The conductivities of the examined glasses ranged from about <10^(-6)> to about 10- <^2S> ・ <cm^(-1)> at 200゜C. The magnitude of conductivity, though it varies to some extent with glass composition, increased in the order described above. As the result a fluoride glass with a conductivity superior to that <beta> -Pb <F_2> was found in the In <F_3> -based glass system.2. The transport numbers of <F^-> ions were examined of Zr <F_4> -Ba <F_2> -CsF and Fe <F_3> -Mn <F_2> -Pb <F_2> glasses with relatively high electrical conductivities by the Tubandt and emf methods, respectively. The result revealed that the former glasses are purely <F^-> -ion conductors, while the latter glasses are mixed <F^-> -ion and electron conductors.3. Electrical conductivity and <^(19)F> -CW・NMR measurements were made of a BaZr … More <F_6> glass and <alpha> - and <beta> -BaZr <F_6> crystals. The NMR result elucidated that, in the glass and the crystals, there are two kinds of <F^-> -ion sites with different behaviors of motion. The electrical conductivity and NMR results clarified that the easiness of <F^-> -ion movement are in the order BaZr <F_6> glass, <beta> -BaZr <F_6> , <alpha> -BaZr <F_6> , indicating that a glassy state is favorable for <F^-> -ion conduction, compared with a crystalline state.4. Based on the compositional dependence of electrical conductivity of various fluoride glasses and Zr <F_4> -Ba <F_2> -CsF glasses, the followings were deduced on the <F^-> -ion conduction-determining factors: The conductivity of <F^-> ions in fluoride glasses are predominantly determined by the activation energies for conduction. The activation energy for conduction decreases with an increase in the average polarizability of glass-constituting cations and with a decrease in the single bond strengths between glass-forming cations and <F^-> ions. Less
1.用交流方法测量了Al&lt;F_3&gt;-,HF&lt;F_4&gt;-,Sc&lt;F_3&gt;-,Zn&lt;F_2&gt;-,Zr&lt;F_4&gt;-,Ga&lt;F_3&gt;-,Fe&lt;F_3&gt;-,In&lt;F_3&gt;在200゜C下,所考察玻璃的电导率从约~lt;10^(-6)&gt;到约10-lt;^2S&gt;·&lt;cm^(-1)&gt;。电导率的大小虽然随玻璃成分的不同而有所不同,但按上述顺序增加。结果发现,在In-lt;F3&gt;基玻璃体系中发现了一种导电性优于&lt;β&gt;-pb&lt;F2&gt;的氟化物玻璃。用Tuband和EMF方法分别测定了具有较高电导率的Zr&lt;F4&gt;-Ba&lt;F2&gt;-CSF和Fe&lt;F3&gt;-Mn&lt;F2&gt;-Pb&lt;F2&gt;-Pb&lt;F2&gt;玻璃的输运数。结果表明,前者玻璃为纯&lt;F^-&gt;-离子导体,后者为&lt;F^-&gt;-离子和电子混合导体。用~(19)F&~(19)F-CW·核磁共振法测定了…的电导率更多&lt;F_6&>玻璃和&lt;α&>和&lt;β&>;-BaZr&lt;F_6&>;晶体。核磁共振结果表明,在玻璃和晶体中,存在着两种不同运动行为的~lt;F^-&gt;-离子位。电导率和核磁共振结果表明,~lt;F^-&gt;离子的易移性顺序为:BaZr&lt;F_6&gt;玻璃,&lt;β&gt;-BaZr&lt;F_6&gt;,&lt;α&gt;-BaZr&lt;-BaZr&lt;F_6&gt;,表明玻璃态比晶态更有利于&lt;F^-&gt;-离子的导电。根据不同氟化物玻璃和Zr&lt;F_4&gt;-Ba&lt;F_2&gt;-CSF玻璃的电导率与组成的关系,推导出了&lt;F^-&gt;-离子的电导决定因素:氟化物玻璃中&lt;F^-&gt;离子的电导率主要由电导活化能决定。电导活化能随玻璃阳离子平均极化率的增大而减小,随玻璃形成阳离子与~lt;F^-&gt;离子间单键强度的减小而减小。较少

项目成果

期刊论文数量(10)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
河本洋二: 日本化学会誌. 1783-1789 (1985)
Yoji Kawamoto:日本化学会杂志 1783-1789 (1985)。
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    0
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Yoji Kawamoto: Solid state Ionics. 22. 207-212 (1987)
河本洋司:固态离子学。
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Yoji Kawamoto: "Ionic Conduction of Zr <F_4> -Ba <F_2> -CsF Glasses" Solid State Ionics. 22. 207-212 (1987)
Yoji Kawamoto:“Zr <F_4> -Ba <F_2> -CsF 玻璃的离子传导”固态离子学。
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    0
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Yoji Kawamoto: "Chemical State of Iron and Electrical Conduction in Fe <F_3> -Pb <F_2> -Mn <F_2> Glasses" J. Non-Crystalline Solids. To be published.
Yoji Kawamoto:“Fe <F_3> -Pb <F_2> -Mn <F_2> 玻璃中铁的化学状态和导电性”J. 非结晶固体。
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Yoji Kawamoto: "Ionic Conductivity of Zr <F_4> -Ba <F_2> -M <F_n> Fluoride Glasses (M: The Group I-V Metal Elements)" Nippon Kagaku Kaishi. 1783-1789 (1985)
Yoji Kawamoto:“Zr <F_4> -Ba <F_2> -M <F_n> 氟化物玻璃(M:第 I-V 族金属元素)的离子电导率”Nippon Kagaku Kaishi。
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KAWAMOTO YOJI其他文献

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