Effect of A-Site Cation Deficiency on the Thermoelectric Performance of Donor-Substituted Strontium Titanate

2014 ◽  
Vol 118 (9) ◽  
pp. 4596-4606 ◽  
Author(s):  
A. V. Kovalevsky ◽  
A. A. Yaremchenko ◽  
S. Populoh ◽  
A. Weidenkaff ◽  
J. R. Frade
Keyword(s):  
Strontium Titanate ◽  
Thermoelectric Performance ◽  
Cation Deficiency ◽  
A Site

A-site surface termination in strontium titanate single crystals

2001 ◽  
Vol 79 (12) ◽  
pp. 1786-1788 ◽  
Author(s):  
A. G. Schrott ◽  
J. A. Misewich ◽  
M. Copel ◽  
D. W. Abraham ◽  
Y. Zhang
Keyword(s):  
Single Crystals ◽  
Strontium Titanate ◽  
Surface Termination ◽  
A Site

scholarly journals Facile synthesis of hierarchical A-site cation deficiency perovskite LaxFeO3-y/RGO for high efficiency microwave absorption

2020 ◽  
Vol 20 ◽  
pp. 100344 ◽  
Author(s):  
Zirui Jia ◽  
Zhenguo Gao ◽  
Kaichang Kou ◽  
Ailing Feng ◽  
Chuanhui Zhang ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
High Efficiency ◽  
Facile Synthesis ◽  
Cation Deficiency ◽  
A Site

Synthesis and performance of A-site deficient lanthanum-doped strontium titanate by nanoparticle based spray pyrolysis

2012 ◽  
Vol 201 ◽  
pp. 26-36 ◽  
Author(s):  
Dariusz Burnat ◽  
Andre Heel ◽  
Lorenz Holzer ◽  
Dariusz Kata ◽  
Jerzy Lis ◽  
...  
Keyword(s):  
Spray Pyrolysis ◽  
Strontium Titanate ◽  
And Performance ◽  
A Site

A-site-cation deficiency in the SrCe0.9Yb0.1O3−δ perovskite: effects of charge-compensation mechanism on structure and proton conductivity

2011 ◽  
Vol 21 (15) ◽  
pp. 5764 ◽  
Author(s):  
Glenn C. Mather ◽  
Susana García-Martín ◽  
Darja Benne ◽  
Clemens Ritter ◽  
Ulises Amador
Keyword(s):  
Proton Conductivity ◽  
Charge Compensation ◽  
Compensation Mechanism ◽  
Cation Deficiency ◽  
A Site

Combined effects of A-site deficiency and dopant content on the transport properties of Nb-doped strontium titanate

Ionics ◽  
1997 ◽  
Vol 3 (1-2) ◽  
pp. 16-22 ◽  
Author(s):  
J. C. C. Abrantes ◽  
J. A. Labrincha ◽  
J. R. Frade
Keyword(s):  
Transport Properties ◽  
Strontium Titanate ◽  
Combined Effects ◽  
Dopant Content ◽  
A Site

scholarly journals Scaling up aqueous processing of A-site deficient strontium titanate for SOFC anode supports

2018 ◽  
Vol 38 (4) ◽  
pp. 1663-1672 ◽  
Author(s):  
Maarten C. Verbraeken ◽  
Bhaskar Reddy Sudireddy ◽  
Viacheslav Vasechko ◽  
Mark Cassidy ◽  
Tânia Ramos ◽  
...  
Keyword(s):  
Strontium Titanate ◽  
Scaling Up ◽  
Aqueous Processing ◽  
Sofc Anode ◽  
A Site

scholarly journals Impact of A-Site Cation Deficiency on Charge Transport in La0.5−xSr0.5FeO3−d

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 5990
Author(s):  
Oleg V. Merkulov ◽  
Ruslan R. Samigullin ◽  
Alexey A. Markov ◽  
Mikhail V. Patrakeev
Keyword(s):  
Electrical Conductivity ◽  
Charge Transport ◽  
Effective Means ◽  
Nonlinear Dependence ◽  
Cationic Vacancy ◽  
Ceramic Surface ◽  
X Ray Diffraction ◽  
Cation Deficiency ◽  
Oxygen Ion ◽  
A Site

The electrical conductivity of La0.5−xSr0.5FeO3−δ, investigated as a function of the nominal cation deficiency in the A-sublattice, x, varying from 0 to 0.02, has demonstrated a nonlinear dependence. An increase in the x value from 0 to 0.01 resulted in a considerable increase in electrical conductivity, which was shown to be attributed mainly to an increase in the mobility of the charge carriers. A combined analysis of the defect equilibrium and the charge transport in La0.5−xSr0.5FeO3−δ revealed the increase in the mobility of oxygen ions, electrons, and holes by factors of ~1.5, 1.3, and 1.7, respectively. The observed effect is assumed to be conditioned by a variation in the oxide structure under the action of the cationic vacancy formation. It was found that the cation deficiency limit in La0.5−xSr0.5FeO3−δ did not exceed 0.01. A small overstep of this limit was shown to result in the formation of (Sr,La)Fe12O19 impurity, which even in undetectable amounts reduced the conductivity of the material. The presence of (Sr,La)Fe12O19 impurity was revealed by X-ray diffraction on the ceramic surface after heat treatment at 1300 °C. It is most likely that the formation of traces of the liquid phase under these conditions is responsible for the impurity migration to the ceramic surface. The introduction of a cation deficiency of 0.01 into the A-sublattice of La0.5−xSr0.5FeO3−δ can be recommended as an effective means to enhance both the oxygen ion and the electron conductivity and improve ceramic sinterability.

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