Characterization and electrochemical properties of chromium-substituted pyrochlore Y2Ti2−x Cr x O7−δ

Hao, Chia Kan; Hung, Hao En; Lee, Chi‐Shen

doi:10.1007/s10971-015-3791-4

Cited by 5 publications

(1 citation statement)

References 30 publications

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“…Compounds with a pyrochlore structure are of great interest due to the possibility of their use for solving a number of significant problems, such as the creation of fuel cells [1][2][3][4], microwave technology materials [5], visible-light photocatalysts for water and organic dyes decomposition [6][7][8], CO oxidation catalysts [9], phosphors [10,11], ceramic pigments [12], and ceramics for nuclear waste disposal [13][14][15]. Also, the attention of researchers is focused on their magnetic [16,17] and electrical properties [3,18,19].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Thermodynamic Properties of the Ln2CrTaO7 (Ln = Sm, Gd, Y) Pyrochlores

Егорышева

Popova

Tyurin

et al. 2021

Russ. J. Inorg. Chem.

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Ln 2 CrTaO 7 (Ln = Sm, Gd, Y) pyrochlores are synthesized by the co-precipitation with subsequent annealing. The effect of the precursor composition ((NH 4 ) 2 Cr 2 O 7 , Cr(NO 3 ) 3 , and CrCl 3 ) on the precipitates reactivity and product microstructure was studied. Samples with an average particle size of 200 nm for Y 2 CrTaO 7 , 450 nm for Gd 2 CrTaO 7 and 600 nm for Sm 2 CrTaO 7 were used to study thermodynamic properties. The temperature dependences of heat capacity were measured by the adiabatic calorimetry (13-346.16 K) method and the ratio method using DSC measurements (330-1300 K). The thermodynamic functions of Ln 2 CrTaO 7 compounds were calculated. The absence of polymorphic transitions up to a temperature of 1450°C for all studied compounds is shown.

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