Ordered to defect fluorite structural transition in Ce 1-x Nd x O 2-d system and its influence on ionic conductivity

被引：9

作者：

Aarthi, U. ^{[1
]}

Shukla, Dhananjaya ^{[1
]}

Rengaraj, S. ^{[1
]}

Babu, K. Suresh ^{[1
]}

机构：

[1] Pondicherry Univ, Ctr Nanosci & Technol, Madanjeet Sch Green Energy Technol, Pondicherry 605014, India

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2020年 / 838卷

关键词：

CO-DOPED CERIA; ELECTRICAL-PROPERTIES; THERMAL-EXPANSION; SOLID-SOLUTIONS; PHASE-RELATIONS; GD; SM; RAMAN; ELECTROLYTES; PYROCHLORES;

D O I：

10.1016/j.jallcom.2020.155534

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 structural transformation from fluorite – defect fluorite – hexagonal phase on the heavily doped ceria system (Ce1-xNdxO2-δ X = 0, 25, 50, 75 and 100 mol%) has been investigated in this study. The oxygen ionic conductivity increased with dopant content till 50 mol% due to the formation of rare earth C-type superstructure defect fluorite. The co-formation of rare earth C-type structure along with the fluorite increase the anion vacancies and facilitates the barrier free ion migration. The long-range ordering and the existence of mixed phases in the heavily doped (75 mol%) system lowered the oxide ion conductivity. Ce0.5Nd0.5O1.75 in disordered fluorite structure exhibits a superior ionic conductivity of 6.0 mS/cm with an activation energy of 0.93 eV which has a potential as electrolyte in solid oxide fuel cells application. © 2020 Elsevier B.V.

引用

页数：10

共 50 条

[1] Conductivity relaxation study on (Bi2O3)1-x(Y2O3)x and (Bi2O3)1-x(Gd2O3)x with the defect fluorite structure
Takai, S
Kohno, N
Esaka, T
MATERIALS RESEARCH BULLETIN, 1998, 33 (06) : 945 - 953
[2] Effect of Nd content on the energetics of H2O adsorption and defect structure in the Ce(1-x)NdxO(2-0.5x) system
Mordekovitz, Y.
Sagi, S.
Barzilai, S.
Hayun, S.
JOURNAL OF MATERIALS CHEMISTRY A, 2020, 8 (41) : 21842 - 21851
[3] Ionic conductivity and local structural features in Ce1-xSmxO2-x/2
Presto, S.
Artini, C.
Pani, M.
Carnasciali, M. M.
Massardo, S.
Viviani, M.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2018, 20 (44) : 28338 - 28345
[4] (AgI)(1-x)-(Al2O3)x nanocomposite system: ionic conductivity simulations by a random variable theory
Pena Lara, D.
Correa, H.
Suescun-Diaz, Daniel
IONICS, 2022, 28 (06) : 2911 - 2917
[5] Synthesis, Characterization and Oxide Ionic Conductivity of Binary -(Bi2o3)1-x(Lu2o3)x System
Ozturk, Esra
Kalaycioglu, Nilgun Ozpozan
JOURNAL OF THE CHINESE CHEMICAL SOCIETY, 2013, 60 (06) : 605 - 607
[6] Synthesis, Characterization and Oxide Ionic Conductivity of Binary β-(Bi2O3)1-x(Lu2O3)x System
Kalaycioglu, Nilgun Ozpozan
Circir, Esra
JOURNAL OF THE CHINESE CHEMICAL SOCIETY, 2012, 59 (01) : 28 - 31
[7] EXAFS study of (La(1-x)M(x))(2)Zr2O7 (M=Nd and Ce)
Yokoi, H
Arita, Y
Matsui, T
Ohno, H
Kobayashi, K
JOURNAL OF NUCLEAR MATERIALS, 1996, 238 (2-3) : 163 - 168
[8] Measurement and properties of the oxide ionic conductivity of β-phase in the binary system of (Bi2O3)1-x(Sm2O3)x
Yilmaz, Serdar
Turkoglu, Orhan
Belenli, Ibrahim
MATERIALS CHEMISTRY AND PHYSICS, 2008, 112 (02) : 472 - 477
[9] Effects of Temperature on Electrical Conductivity Behaviour of Ce(1-x)Ag(x)O2 by Combustion Synthesis Technique
Parveen, I. Mubeena
Saravanan, G.
Asvini, V.
Ravichandran, K.
KalaiSelvi, D.
61ST DAE-SOLID STATE PHYSICS SYMPOSIUM, 2017, 1832
[10] Preparation, characterization and ionic conductivity measurements of (1-x) KCl:x ZrO2 solid electrolyte system
Gupta, A
Sil, A
INDIAN JOURNAL OF ENGINEERING AND MATERIALS SCIENCES, 2002, 9 (01) : 65 - 68

← 1 2 3 4 5 →