对 Na2CrO4、K2CrO4、Na2MoO4、K2MoO4、Na2WO4 和 K2WO4 热力学性质的严格评估和量热研究

IF 4.4 2区 工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY
Sara Benalia, F. Tesfaye, Daniel Lindberg, David Sibarani, Leena Hupa, Patrice Chartrand, C. Robelin
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引用次数: 0

摘要

本文评价了从文献中收集的铬酸钠、铬酸钾、钼酸钠、钼酸钾(K2MoO4)、钨酸钠和钨酸钾的晶体学数据和热力学性质。为了获得对现有数据的充分理解,进行了全面的文献综述,并从室温到熔融温度以上进行了关键评估。用差示扫描量热法测定了六种纯盐的固固转变和熔融性能,并用高温x射线粉末衍射测定了K2MoO4相的晶体结构和空间基团。这项工作是建立Na+, K+//Cl−,SO42−,CO32−,CrO42−,Cr2O72−,MoO42−,Mo2O72−,WO42−,W2O72−,O2−体系热力学模型的第一步,该模型与含有O-H-S-C-Cl和碱盐的大气中的高温腐蚀有关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Critical Evaluation and Calorimetric Study of the Thermodynamic Properties of Na2CrO4, K2CrO4, Na2MoO4, K2MoO4, Na2WO4, and K2WO4
This paper evaluates crystallographic data and thermodynamic properties for sodium chromate, potassium chromate, sodium molybdate, potassium molybdate (K2MoO4), sodium tungstate, and potassium tungstate collected from the literature. A thorough literature review was carried out to obtain a good understanding of the available data, and a critical evaluation has been performed from room temperature to above the melting temperatures. Also, the solid–solid transition and melting properties of the six pure salts were measured by differential scanning calorimetry, and high-temperature x-ray powder diffraction measurements were performed to determine the crystal structures and space groups associated with the phases of K2MoO4. This work is the first step towards the development of a thermodynamic model for the Na+, K+//Cl−, SO42−, CO32−, CrO42−, Cr2O72−, MoO42−, Mo2O72−, WO42−, W2O72−, O2− system that is relevant for high temperature corrosion in atmospheres containing O–H–S–C–Cl and alkali salts.
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来源期刊
CiteScore
6.90
自引率
11.60%
发文量
14
审稿时长
>12 weeks
期刊介绍: The Journal of Physical and Chemical Reference Data (JPCRD) is published by AIP Publishing for the U.S. Department of Commerce National Institute of Standards and Technology (NIST). The journal provides critically evaluated physical and chemical property data, fully documented as to the original sources and the criteria used for evaluation, preferably with uncertainty analysis. Critical reviews may also be included if they document a reference database, review the data situation in a field, review reference-quality measurement techniques, or review data evaluation methods.
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