THERMODYNAMIC ANALYSIS OF YBA2CU3O7-X

被引：0
|
作者：
PLEWA, J [1 ]
ALTENBURG, H [1 ]
HAUCK, J [1 ]
机构：
[1] FORSCHUNGSZENTRUM JULICH,INST FESTKURPERFORSCH,D-52428 JULICH,GERMANY
来源：
ZEITSCHRIFT FUR METALLKUNDE | 1993年 / 84卷 / 09期
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中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The thermodynamic properties of YBa2Cu3O7-x for 0 < x < 0.2 have been reviewed. At 298 K the following values were determined: c(p) = 295.4 J/(mol . K), S298-degrees = 326.5 J/(mol . K) and DELTA(f)H298-degrees = -2711 kJ/mol. Thermodynamic data for the specific heat were approximated by the following polynomials: c(p) = 2.914 . 10(2) + 1.596 . 10(-1) T-1.084 . 10(-4) T2 -3.09 . 10(6) c(p) in J/(mol . K) in the temperature range of 298 to 342 K and c(p) 3.037. 10(2) + 6.639. 10(-2) T-2.286 . 10(6) T-2 in J/(mol . K) in the temperature range of 342 to 1293 K. The influence of oxygen deficiency on the thermodynamic properties can be approximated by DELTA(f)H298-degrees = -2711 + 77.578 . x + 1.202 . x2 (kJ/mol) S298-degrees = 326.5 - 4.1 . x (J/(mol . K)).
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页码：652 / 658
页数：7
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