STUDY ON THE BONDING NATURES, STRUCTURES AND DYNAMICAL PROPERTIES IN MOLTEN METAL AND NON-METAL MIXTURES

熔融金属与非金属混合物中的粘结性质、结构和动态性能研究

• 批准号: 02452231
• 负责人: TAMAKI Shigeru
• 金额: $ 4.42万
• 依托单位: NIIGATA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-02452231/
• 关键词: MOLTEN SALT; COMPOUND-FORMING LIQUID ALLOYS; METAL-NONMETAL TRANSITION; X-RAY DIFFRACTION; NEUTRON DIFFRACTION

This study was aimed to see how the structures, dynamical behaviours and several electronic properties in molten materials varied incorporating with their bonding natures.In particular, molten thallium-chalcogen system is a very good example to study the above facts, because its system exhibit continuously from the metallic bonding to ionic and finally to covalent bonding with the change of composition. In the structural investigation, the molten structures of Tl to Tl_2Se are nearly the same, which indicates that the Se atoms may be replaced with Tl atoms although the mixtures maintain a kind of local order. However, the electronic conductivity changes drastically on going from metallic to ionic compound Tl_2Se. In connection with this change the mobility of ion increases drastically.These cross correlation may suggest that the cross conductivities in this system are varied largely in the region of metal-non metal transition.From Tl_2Se to molten Se, the structural investigation suggests a kind of mixed solution of local clusters composed of Se chains and ionic part of Tl_2Se.This implies that an amalgamation between the ionic compound and the covalent bonding material was not maintained.The structural studies and measurements of the magnetic susceptibilities for cuprous halides in their molten states were also carried out.These materials involved partly a covalent character and this character tends to from a tetrahedral configuration in the molten state.

本研究旨在了解熔融材料的结构、动力学行为和几种电子性能如何随其键合性质而变化。特别是熔融铊-硫体系是研究上述事实的一个很好的例子，因为它的体系随着组成的变化，呈现出从金属键到离子键，最后到共价键的连续变化。在结构研究中，Tl到Tl_2Se的熔融结构几乎相同，这表明虽然混合物保持一种局部秩序，但Se原子可能被Tl原子取代。然而，从金属化合物Tl_2Se到离子化合物Tl_2Se的电子导电性发生了巨大的变化。随着这种变化，离子的迁移率急剧增加。这些相互关系可能表明该体系的交叉电导率在金属-非金属过渡区域变化很大。从Tl_2Se到熔融Se，结构研究表明是一种由Se链和Tl_2Se离子部分组成的局部团簇混合溶液。这意味着离子化合物和共价键材料之间的合并没有保持。对卤化亚铜的熔融态进行了结构研究和磁化率测量。这些材料部分具有共价性质，这种性质在熔融状态下趋向于四面体结构。

项目成果

Y.Shirakawa, M.Saito, S.Tamaki, M.Inui and S.Takada: "Structures of Molten CuCl, CuBr and CuI" J.Phys. Soc. Japan. 60. 2678-2683 (1991)

Y.Shirakawa、M.Saito、S.Tamaki、M.Inui 和 S.Takada：“熔融 CuCl、CuBr 和 CuI 的结构”J.Phys。

M.Inui: "Structural Study of Molten Silrer Halides by Neutron Diffraction" J.Phys.Soc.Japan. 60. 2241-2247 (1991)

M.Inui：“通过中子衍射对熔融银卤化物进行结构研究”J.Phys.Soc.Japan。

Y.Shirakawa: "Diamagnatic Properties of Molten Cuprous Halides and Their Mixtures" J.Phys.Soc.Japan. 62. 544-551 (1993)

Y.Shirakawa：“熔融卤化亚铜及其混合物的抗磁性”J.Phys.Soc.Japan。

M.Saito and S.Tamaki: "Thermal Expansion of the AgBr-CuBr System" J.Phys. Soc. Japan. 60. 573-579 (1990)

M.Saito 和 S.Tamaki：“AgBr-CuBr 系统的热膨胀”J.Phys。

S.Takeda,S.Harada,S.Tamaki,E.Matsubara and Y.Waseda: "Structural study of Liquid NaーTl Alloys by Neutron Diffraction" J.NonーCrystalline Solids. 117/118. 68-71 (1990)

S.Takeda、S.Harada、S.Tamaki、E.Matsubara 和 Y.Waseda：“通过中子衍射进行液体 Na-Tl 合金的结构研究”J.Non-Crystalline Solids 117/118 (1990)。