Synthesis and Thermodynamic Properties of Thulium Titanate

被引：1

作者：

Gagarin, P. G. ^{[1
]}

Guskov, A. V. ^{[1
]}

Guskov, V. N. ^{[1
]}

Khoroshilov, A. V. ^{[1
]}

Gavrichev, K. S. ^{[1
]}

机构：

[1] Russian Acad Sci, Kurnakov Inst Gen & Inorgan Chem, Moscow 119991, Russia

来源：

RUSSIAN JOURNAL OF INORGANIC CHEMISTRY | 2024年 / 69卷 / 09期

关键词：

thulium titanate; synthesis; thermodynamic functions; Schottky anomaly; PYROCHLORES; ENTHALPIES; HO; LN; ER;

D O I：

10.1134/S0036023624602046

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The temperature stages of crystallization process for thulium titanate of pyrochlore structural type during the heating of hydroxide precursor obtained by reverse precipitation have been studied by DSC/TG, XRD, and electron microscopy. Tm2Ti2O7 has been measured in the temperature range 2-1870 K and thermodynamic functions at 0-1900 K and the Gibbs energy of formation from oxides and elements have been calculated based on smoothed heat capacity. The contribution of the Schottky anomaly at 20-320 K into heat capacity has been revealed.

引用

页码：1438 / 1449

页数：12

共 37 条

[1]

Arsen'ev P.A, 1985, Compounds of Rare Earth Elements: Zirconates, Hafnates, Niobates, Tantalates, Antimonates

[2] Low-temperature heat capacity and thermodynamic functions of thulium and lutetium titanates and Schottky anomaly in Tm2Ti2O7 [J].

Bissengaliyeva, Mira R. ;

Knyazev, Alexander, V ;

Bespyatov, Michael A. ;

Gogol, Daniil B. ;

Taimassova, Shynar T. ;

Zhakupov, Ramazan M. ;

Sadyrbekov, Daniyar T. .

JOURNAL OF CHEMICAL THERMODYNAMICS, 2022, 165

[3] PREPARATION + PROPERTIES OF LN2TI2O7-TYPE RARE EARTH TITANATES [J].

BRIXNER, LH .

INORGANIC CHEMISTRY, 1964, 3 (07) :1065-&

[4]

Chase M. W., 1998, NIST-JANAF Thermochemical Tables

[5]

Erschova L. M., 1977, INORGAN MAT, V13, P2042

[6] Structural and crystal chemical properties of rare-earth titanate pyrochlores [J].

Farmer, J. Matt ;

Boatner, Lynn A. ;

Chakoumakos, Bryan C. ;

Du, Mao-Hua ;

Lance, Michael J. ;

Rawn, Claudia J. ;

Bryan, Jeff C. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2014, 605 :63-70

[7]

Glushko V.P., 1965, Thermal Constants of Substances

[8]

Greedan J. E., 2006, J ALLOY COMPD, V412, P444, DOI [10.1016/j.jallcom.2024.12.084, DOI 10.1016/J.JALLCOM.2024.12.084]

[9] Thermal properties of solid solutions Ln2O3•2HfO2 (Ln = Dy, Ho, Er, Tm, Yb, Lu) at 300-1300 K [J].

Guskov, A. V. ;

Gagarin, P. G. ;

Guskov, V. N. ;

Khoroshilov, A. V. ;

Gavrichev, K. S. .

CERAMICS INTERNATIONAL, 2021, 47 (19) :28004-28007

[10] Thermodynamic Functions of Complex Zirconia Based Lanthanide Oxides-Pyrochlores Ln2Zr2O7 (Ln = La, Pr, Sm, Eu, Gd) and Fluorites Ln2O3 • 2ZrO2 (Ln = Tb, Ho, Er, Tm) [J].

Guskov, V. N. ;

Gavrichev, K. S. ;

Gagarin, P. G. ;

Guskov, A. V. .

RUSSIAN JOURNAL OF INORGANIC CHEMISTRY, 2019, 64 (10) :1265-1281

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