Thermodynamic Properties of Y2Ti2O7 and Eu2Ti2O7 in the Temperature Range 7-1800 K

被引：0
|
作者：
Gagarin, P. G. [1 ]
Gus'kov, A. V. [1 ]
Khoroshilov, A. V. [1 ]
Gus'kov, V. N. [1 ]
Kondrat'eva, O. N. [1 ]
Ryumin, M. A. [1 ]
Nikiforova, G. E. [1 ]
Gavrichev, K. S. [1 ]
机构：
[1] Russian Acad Sci, Kurnakov Inst Gen & Inorgan Chem, Moscow 119991, Russia
来源：
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2024年 / 98卷 / 09期
关键词：
titanates; yttrium; europium; pyrochlore; heat capacity; thermodynamics; HEAT-CAPACITY; PYROCHLORE; CONDUCTIVITY;
D O I：
10.1134/S0036024424700973
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The temperature dependence of the heat capacity of Y2Ti2O7 and Eu2Ti2O7 with a pyrochlore structure in the temperature range of 7-1800 K has been studied. The existence of a small shallow anomaly of the heat capacity of europium titanate in the range of 10-60 K was confirmed. The thermodynamic properties (entropy, enthalpy change, and reduced Gibbs energy) were calculated. Based on the results of calculation of the Gibbs energy of formation of the titanates from oxides it was concluded that both titanates are thermodynamically stable in the high temperature region.
引用
收藏
页码：1883 / 1894
页数：12
相关论文
共 50 条
  • [21] Ab initio calculations of structural and electronic properties of Y2Ti2O7 and Cd2Nb2O7
    Terki, R.
    Bertrand, G.
    Aourag, H.
    Coddet, C.
    PHYSICA B-CONDENSED MATTER, 2007, 392 (1-2) : 341 - 347
  • [22] Synthesis and characterization of Y2Ti2O7 and ErxY2−xTi2O7 nanofibers
    Kanchan Mondal
    Kaleb Hartman
    Debalina Dasgupta
    George Trifon
    Mallika Dasari
    Journal of Sol-Gel Science and Technology, 2015, 73 : 265 - 269
  • [23] Fabrication and properties of Y2Ti2O7 transparent ceramics with excess Y content
    Wang, Xiaojun
    Xie, Jianjun
    Wang, Zhengjuan
    Zhou, Guohong
    Shi, Ying
    Wang, Shiwei
    Mao, Xiaojian
    CERAMICS INTERNATIONAL, 2018, 44 (08) : 9514 - 9518
  • [24] Structural, optical and mechanical properties of Y2Ti2O7 single crystal
    Suganya, M.
    Ganesan, K.
    Vijayakumar, P.
    Gill, Amirdha Sher
    Ramaseshan, R.
    Ganesamoorthy, S.
    SCRIPTA MATERIALIA, 2020, 187 : 227 - 231
  • [25] An interpretation of the optical properties of Cr4+-activated pyrochlores, Y2Ti2O7 and Y2Sn2O7
    Srivastava, A. M.
    JOURNAL OF LUMINESCENCE, 2009, 129 (09) : 1000 - 1002
  • [26] ELECTRICAL TRANSPORT-PROPERTIES OF EU2TI2O7 SINGLE-CRYSTAL
    PANDIT, AK
    ANSARI, TH
    SINGH, RS
    SINGH, RA
    WANKLYN, BM
    JOURNAL OF MATERIALS SCIENCE, 1992, 27 (15) : 4080 - 4084
  • [27] Role of sintering temperature on thermal, electrical and structural properties of Y2Ti2O7 pyrochlores
    Gill, Jasmeet Kaur
    Pandey, O. P.
    Singh, K.
    INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2011, 36 (22) : 14943 - 14947
  • [28] Crystal structural and optical properties of Cr-doped Y2Ti2O7 and Y2Sn2O7 pyrochlores
    Matteucci, F.
    Cruciani, G.
    Dondi, M.
    Baldi, G.
    Barzanti, A.
    ACTA MATERIALIA, 2007, 55 (07) : 2229 - 2238
  • [29] The investigation of the photoluminescent and piezoelectric effect of Eu3+ Check doped Y2Ti2O7 and Sm2Ti2O7 host crystals
    Ozturk, Esra
    Sarilmaz, Ebru
    MATERIALS CHEMISTRY AND PHYSICS, 2020, 239 (239)
  • [30] High-pressure synchrotron X-ray diffraction study of the pyrochlores: Ho2Ti2O7, Y2Ti2O7 and Tb2Ti2O7
    Scott, Paul R.
    Midgley, A.
    Musaev, O.
    Muthu, D. V. S.
    Singh, S.
    Suryanarayanan, R.
    Revcolevschi, A.
    Sood, A. K.
    Kruger, M. B.
    HIGH PRESSURE RESEARCH, 2011, 31 (01) : 219 - 227
12345