LaPO4-YPO4-(H2O) 体系中的相图和易变相

IF 1.8 3区化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR

Russian Journal of Inorganic Chemistry Pub Date : 2024-07-17 DOI:10.1134/s0036023623603021

M. O. Enikeeva, O. V. Proskurina, V. V. Gusarov

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引用次数: 0

摘要

摘要在T ~ 230°C的水热条件下以及在1000-1400°C温度范围内的空气中进行热处理后，对LaPO4-YPO4-(H2O)体系中的相形成进行了研究。为 LaPO4-YPO4 体系构建了体系中的相平衡图。计算了具有临界点 Tcr = 931°C 的独居石结构相的可转移双晶和旋光分解区域。实验测定的共晶温度为 1850 ± 35°C，与计算值 Te = 1820°C 非常吻合。根据相图的热力学优化结果，在共晶温度下，YPO4 在 LaPO4 中的最大溶解度为 50.5 摩尔%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Phase Diagram and Metastable Phases in the LaPO4–YPO4–(H2O) System

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Phase Diagram and Metastable Phases in the LaPO4–YPO4–(H2O) System

Abstract

Phase formation in the LaPO₄–YPO₄–(H₂O) system have been studied under hydrothermal conditions at T ~ 230°C and after heat treatment in air in the temperature range 1000–1400°C. The phase equilibria diagram in the system has been constructed for the LaPO₄–YPO₄ system. The regions of metastable binodal and spinodal decomposition of a phase with a monazite structure with a critical point T_cr = 931°C have been calculated. The experimentally determined eutectic temperature of 1850 ± 35°C is in good agreement with the calculated value T_e = 1820°C. The maximum solubility of YPO₄ in LaPO₄ at eutectic temperature obtained from the results of thermodynamic optimization of the phase diagram is 50.5 mol %.

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来源期刊

Russian Journal of Inorganic Chemistry 化学-无机化学与核化学

CiteScore

3.10

自引率

38.10%

发文量

237

审稿时长

3 months

期刊介绍： Russian Journal of Inorganic Chemistry is a monthly periodical that covers the following topics of research: the synthesis and properties of inorganic compounds, coordination compounds, physicochemical analysis of inorganic systems, theoretical inorganic chemistry, physical methods of investigation, chemistry of solutions, inorganic materials, and nanomaterials.