合成类似物 NaHSO4-H2O 和 α-NaHSO4 的热膨胀率

IF 0.8 4区材料科学 Q4 MATERIALS SCIENCE, CERAMICS Glass Physics and Chemistry Pub Date : 2024-09-25 DOI:10.1134/S1087659624600297

A. P. Shablinskii, N. V. Dmitrieva, R. S. Bubnova, S. K. Filatov, M. G. Krzhizhanovskaya, V. L. Ugolkov

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摘要

研究了硫酸水溶液 NaHSO4-H2O 及其脱水产物 α-NaHS-O4 的热行为。研究采用高温 X 射线衍射和复合热分析法进行。根据三次实验的数据，确定了相变的温度、性质和顺序：NaHSO4-H2O（30-50°C）→α-NaHSO4（140-180°C）→Na2S2O7 + Na3H(SO4)2。随着温度的升高，NaHSO4-H2O 结构中的 NaO3(OH)(H2O)2 多面体链发生铰链变形。NaHSO-4-H2O 的热膨胀各向异性为 αmax/αmin = 1.9，NaHSO4 的热膨胀各向异性为 αmax/αmin = 1.3。

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Thermal Expansion of a Synthetic Analog of Matteuccite NaHSO4·H2O and α-NaHSO4

The thermal behavior of aqueous sulfate NaHSO₄·H₂O and the product of its dehydration α‑NaHS-O₄ is studied. The studies are carried out using high temperature X-ray diffraction and complex thermal analysis. Based on the data of three experiments, the temperature, nature, and sequence of phase transformations are established: NaHSO₄·H₂O^(30–50°C) → α-NaHSO₄^{(140–180°C)} → Na₂S₂O₇ + Na₃H(SO₄)_2. With increasing temperature increasing in the NaHSO₄·H₂O structure hinge deformations occur at the level of a chain of NaO₃(OH)(H₂O)₂ polyhedra. The anisotropy of thermal expansion is α_max/α_min = 1.9 for NaHSO-₄·H₂O and α_max/α_min = 1.3 for NaHSO₄.

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来源期刊

Glass Physics and Chemistry 工程技术-材料科学：硅酸盐

CiteScore

1.20

自引率

14.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Glass Physics and Chemistry presents results of research on the inorganic and physical chemistry of glass, ceramics, nanoparticles, nanocomposites, and high-temperature oxides and coatings. The journal welcomes manuscripts from all countries in the English or Russian language.