纳米结构氯硼酸盐中的阴离子定向和阳离子扩散：核磁共振和准弹性中子散射研究

IF 1.1 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING Physics of Metals and Metallography Pub Date : 2024-05-27 DOI:10.1134/s0031918x23603050

A. V. Skripov, O. A. Babanova, R. V. Skoryunov, A. V. Soloninin

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摘要

摘要通过核磁共振（NMR）和准弹性中子散射（QENS）研究了嵌入二氧化硅基纳米多孔支架中的氯硼酸钠 NaCB11H12 在宽温度范围内的动态特性。研究发现，封闭硼酸盐在纳米孔隙中的封闭作用抑制了有序-无序相变，在低温下保留了取向无序相，阴离子具有较高的再取向迁移率，阳离子具有较高的扩散迁移率。本文根据在 RNIKS-2023 会议上的发言整理而成。

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Anion Reorientations and Cation Diffusion in Nanostructured Closo-Borates: NMR and Quasielastic Neutron Scattering Studies

Abstract

The dynamical properties of sodium closo-borate NaCB₁₁H₁₂ embedded into SiO₂-based nanoporous scaffolds have been studied by nuclear magnetic resonance (NMR) and quasielastic neutron scattering (QENS) over wide temperature ranges. It has been found that a confinement of the closo-borate in nanopores suppresses the order-disorder phase transition, retaining the orientationally disordered phase with high reorientational mobility of the anions and high diffusive mobility of the cations down to low temperatures. This paper is based on the presentation at the RNIKS-2023 conference.

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来源期刊

Physics of Metals and Metallography 工程技术-冶金工程

CiteScore

2.00

自引率

25.00%

发文量

108

审稿时长

3 months

期刊介绍： The Physics of Metals and Metallography (Fizika metallov i metallovedenie) was founded in 1955 by the USSR Academy of Sciences. Its scientific profile involves the theory of metals and metal alloys, their electrical and magnetic properties, as well as their structure, phase transformations, and principal mechanical properties. The journal also publishes scientific reviews and papers written by experts involved in fundamental, application, and technological studies. The annual volume of publications amounts to some 250 papers submitted from 100 leading national scientific institutions.