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Enthalpy of Formation of Erbium-Doped Bismuth Niobate
Russian Journal of Inorganic Chemistry ( IF 1.8 ) Pub Date : 2020-06-05 , DOI: 10.1134/s0036023620050162
N. I. Matskevich , A. N. Semerikova , N. V. Gelfond , M. Yu. Matskevich , E. N. Tkachev , O. I. Anufrieva , V. G. Martynetz

Abstract

The thermodynamic characteristics of bismuth niobate doped with erbium Bi3Nb0.2Er0.8O6.2 have been determined. This compound is a representative of a promising class of ionic conductors. The solution enthalpies of bismuth oxide, erbium oxide, niobium chloride, and Bi3Nb0.2Er0.8O6.2 have been measured in 4 M HCl using solution calorimetry. Based on the experimental and reported data, we have calculated the standard formation enthalpy ΔfH°(Bi3Nb0.2Er0.8O6.2, 298.15 K) = −1787.5 ± 8.9 kJ/mol and the lattice enthalpy ΔlatH°(Bi3Nb0.2Er0.8O6.2, 298.15 K) = −28 540 kJ/mol. The obtained thermodynamic characteristics can be used to develop recommendations for optimizing the synthesis of materials based on bismuth oxides.


中文翻译:

掺铌铌酸铋的生成焓

摘要

测定了掺Bi 3 Nb 0.2 Er 0.8 O 6.2的铌酸铋的热力学特性。该化合物是有前途的离子导体类的代表。使用溶液量热法在4 M HCl中测量了氧化铋,氧化er ,氯化铌和Bi 3 Nb 0.2 Er 0.8 O 6.2的溶液焓。根据实验和报告数据,我们计算出标准形成焓Δf H °(Bi 3 Nb 0.2 Er 0.8 O 6.2,298.15 K)= -1787.5±8.9千焦/摩尔和晶格焓Δ纬度ħ °的(Bi 3的Nb 0.20.8 ø 6.2,298.15 K)= -28 540千焦/摩尔。所获得的热力学特性可用于提出建议,以优化基于氧化铋的材料的合成。
更新日期:2020-06-05
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