Structure and Diffuse Scattering in Superionic Conductors by Anomalous X-ray Scattering

通过反常 X 射线散射研究超离子导体中的结构和漫散射

• 批准号: 07640434
• 负责人: SAKUMA Takashi
• 金额: $ 1.28万
• 依托单位: Ibaraki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07640434/
• 关键词: Superionic Conductors; Anomalous X-ray Scattering; Diffuse Scattering; Rietveld method; 熱振動の相関

1 The anomalous X-ray scattering measurements of AgBr were carried out by the double axis goniometer with an intrinsic pure germanium solid state detector and a multi channel analyzer system. The scattering intensity data were well explained by the ordered model with Ag atoms in AgBr.2 The peak positions of the first and second peak in diffuse scattering of AgBr are almost same as those of alpha-RbAg_4I_5, alpha-AgI and beta-Ag_3SI.The main contribution to the oscillatory diffuse scattering of alpha-Ag_2 Te is from the correlation among the displacements of silver and tellurium atoms.3 Strong and oscillatory diffuse scattering from CuI and AgBr has been observed in neutron scattering experiments. The profile shape function of a background in Rietveld analysis has been discussed with the correlation between the thermal displacements of atoms.4 The ionic conductivities of MI-AgPO_3 (M=Ag and alkali ions) glass system have been investigated. The activation energies of ionic conductivities indicate that low frequency ionic conduction is much affected by the structural distortion due to the co-existence of diferent cations in the glass.

1 AgBr的反常X射线散射测量是通过带有本征纯锗固态探测器和多通道分析系统的双轴测角仪进行的。 AgBr中Ag原子的有序模型很好地解释了散射强度数据。2 AgBr漫散射的第一峰和第二峰的峰位置与α-RbAg_4I_5、α-AgI和β-Ag_3SI几乎相同。 α-Ag_2 Te 的振荡漫散射的主要贡献来自于银和碲原子的位移之间的相关性。3 在中子散射实验。讨论了Rietveld分析中背景的轮廓形函数与原子热位移之间的相关性。4研究了MI-AgPO_3(M=Ag和碱离子)玻璃体系的离子电导率。离子电导率的活化能表明，由于玻璃中不同阳离子的共存，低频离子电导率受到结构畸变的影响很大。

项目成果

T.Sakuma: "Diffuse neutron Scattering from superionic phase of Ag_2 Te" Solid State Ionics. 86. 227-230 (1996)

T.Sakuma：“Ag_2 Te 超离子相的扩散中子散射”固态离子学。

Y.Onoda: "NMR study of Cu^+ Ionic Motion in CuI Te" Proceedings of 5-th Asian Conference of Solid State Ionics. (in press).

Y.Onoda：“CuI Te 中 Cu^ 离子运动的 NMR 研究”第五届亚洲固态离子学会议论文集。

Y.Onoda: "NMR Study of Cu^+ Ionic Motion in CuITe" Proceedings of 5-th Asian Conference of Solid state Ionics. (印刷中).

Y. Onoda：“CuITe 中 Cu^+ 离子运动的核磁共振研究”第五届亚洲固态离子学会议论文集（正在出版）。

T.Sakuma: "Diffuse neutron scattering from superionic phase of Ag_2Te" Solid state Ionics. 86. 227-230 (1996)

T.Sakuma：“Ag_2Te 超离子相的扩散中子散射”固态离子学。

佐久間隆: "超イオン導電体の散漫散乱と低エネルギー励起" 日本結晶学会誌. 37. 199-205 (1995)

Takashi Sakuma：“超离子导体中的漫散射和低能激发”日本晶体学会杂志 37. 199-205 (1995)。