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
- 来源:
- 关键词:
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<;F_3>;-,HF<;F_4>;-,Sc<;F_3>;-,Zn<;F_2>;-,Zr<;F_4>;-,Ga<;F_3>;-,Fe<;F_3>;-,In<;F_3>;在200゜C下,所考察玻璃的电导率从约~lt;10^(-6)>;到约10-lt;^2S>;·<;cm^(-1)>;。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>;基玻璃体系中发现了一种导电性优于<;β>;-pb<;F2>;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<;F4>;-Ba<;F2>;-CSF和Fe<;F3>;-Mn<;F2>;-Pb<;F2>;-Pb<;F2>;玻璃的输运数。结果表明,前者玻璃为纯<;F^->;-离子导体,后者为<;F^->;-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<;F_6&>玻璃和<;α&>和<;β&>;-BaZr<;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^->;-离子位。电导率和核磁共振结果表明,~lt;F^->;离子的易移性顺序为:BaZr<;F_6>;玻璃,<;β>;-BaZr<;F_6>;,<;α>;-BaZr<;-BaZr<;F_6>;,表明玻璃态比晶态更有利于<;F^->;-离子的导电。根据不同氟化物玻璃和Zr<;F_4>;-Ba<;F_2>;-CSF玻璃的电导率与组成的关系,推导出了<;F^->;-离子的电导决定因素:氟化物玻璃中<;F^->;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^->;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)
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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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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