Shaping a Doped Perovskite Oxide with Measured Grain Boundary Defects to Catalyze Bifunctional Oxygen Activation for a Rechargeable Zn–Air Battery

2020 ◽  
Vol 12 (36) ◽  
pp. 40355-40363
Author(s):  
Rahul Majee ◽  
Tisita Das ◽  
Sudip Chakraborty ◽  
Sayan Bhattacharyya
Keyword(s):  
Grain Boundary ◽  
Oxygen Activation ◽  
Perovskite Oxide ◽  
Air Battery

Charge transfer from perovskite oxide nanosheets to N-doped carbon nanotubes to promote enhanced performance of a zinc–air battery

2020 ◽  
Vol 56 (59) ◽  
pp. 8277-8280
Author(s):  
Rahul Majee ◽  
Surajit Mondal ◽  
Sayan Bhattacharyya
Keyword(s):  
Carbon Nanotubes ◽  
Charge Transfer ◽  
Double Perovskite ◽  
Oxygen Activation ◽  
Perovskite Oxide ◽  
Air Battery

Charge transfer from spatially connected double perovskite oxide nanosheets to N-doped carbon nanotubes facilitates oxygen activation in a stable zinc–air battery.

Effect of Annealing Atmosphere on Oxygen Diffusion through Ba-Fe-Based Perovskite Oxide

2011 ◽  
Vol 485 ◽  
pp. 141-144 ◽  
Author(s):  
Ken Watanabe ◽  
Tetsuya Kida ◽  
Isao Sakaguchi ◽  
Naoki Ohashi ◽  
Kengo Shimanoe ◽  
...  
Keyword(s):  
High Resolution ◽  
Grain Boundary ◽  
Oxygen Diffusion ◽  
Tracer Diffusion ◽  
The Other ◽  
Perovskite Oxide ◽  
Annealing Atmosphere ◽  
Other Hand ◽  
Secondary Ion

To determine the effect of the annealing atmosphere on oxygen diffusion through Ba0.95La0.05FeO3-d pellets, 18O2 tracer diffusion and high-resolution secondary ion mapping were performed. When annealing in air, the 18O concentration around the surface up to a depth of 40 µm was almost constant. On the other hand, when annealing in vacuum, the 18O concentration obviously decreased. High-resolution secondary ion mapping indicated that the 18O concentration around the grain boundary was reduced. These results suggested that the grain boundary of BLF annealed in vacuum prevents oxygen diffusion.

Atomic Structure of the (310) Symmetrical TILT Grain Boundary in Strontium Titanate - A Comparison among Experimental Methods and Atomistic Simulations

1996 ◽  
Vol 54 ◽  
pp. 330-331
Author(s):  
V. Ravikumar ◽  
Vinayak. P. Dravid ◽  
D. Wolf
Keyword(s):  
Grain Boundary ◽  
Strontium Titanate ◽  
Atomic Structure ◽  
Perovskite Oxide ◽  
Atomistic Simulations ◽  
Kikuchi Pattern ◽  
Lattice Statics ◽  
Transmission Electron ◽  
Theoretical Investigations ◽  
Symmetrical Tilt

Strontium Titanate is a prototypical perovskite oxide whose macroscopic electroceramic properties, like varistor and grain boundary barrier layer capacitor (GBBLC) behavior, are controlled by grain boundary (GB) phenomena. In this paper, we present a comparative analysis of the results of both experimental and theoretical investigations of the atomic structure of a (310) symmetrical tilt GB (a Σ=5 (310) [001] GB in the CSL notation) in SrTiO3. Bicrystals of SrTiO3 were procured from Shinkosha Ltd., and electron backscatter kikuchi pattern analysis as well as transmission electron diffraction studies confirm that the GB conforms to the Σ =5 misorientation. The atomic structure of this GB has been investigated using high resolution transmission electron microscopy (HRTEM) and associated image simulations, as well as by atomistic simulations using static iterative energy minimization schemes (“lattice-statics”).2

Honeycomb-Like Perovskite Oxide Electrocatalyst for a Hybrid Li-Air Battery

2015 ◽  
Vol 162 (14) ◽  
pp. A2651-A2655 ◽  
Author(s):  
Young-Wan Ju ◽  
Seonyoung Yoo ◽  
Limin Guo ◽  
Changmin Kim ◽  
Atsushi Inoishi ◽  
...  
Keyword(s):  
Perovskite Oxide ◽  
Air Battery

Dependence of Intergranular Fracture on Boundary Topography and Cohesion

1973 ◽  
Vol 31 ◽  
pp. 150-151
Author(s):  
J. E. Doherty ◽  
A. F. Giamei ◽  
B. H. Kear ◽  
C. W. Steinke
Keyword(s):  
Grain Boundary ◽  
Room Temperature ◽  
Nickel Base Superalloy ◽  
Boundary Shear ◽  
Room Temperature Ductility ◽  
Solid Solution Matrix ◽  
Nickel Base ◽  
Solution Matrix ◽  
Different Levels ◽  
Base Superalloy

Recently we have been investigating a class of nickel-base superalloys which possess substantial room temperature ductility. This improvement in ductility is directly related to improvements in grain boundary strength due to increased boundary cohesion through control of detrimental impurities and improved boundary shear strength by controlled grain boundary micros true tures.For these investigations an experimental nickel-base superalloy was doped with different levels of sulphur impurity. The micros tructure after a heat treatment of 1360°C for 2 hr, 1200°C for 16 hr consists of coherent precipitates of γ’ Ni3(Al,X) in a nickel solid solution matrix.

Two Investigations into Grain Boundary Structure

1977 ◽  
Vol 35 ◽  
pp. 688-691
Author(s):  
P. Humble
Keyword(s):  
Grain Boundary ◽  
Dark Field ◽  
Boundary Structure ◽  
Boundary Dislocation ◽  
Bright Field ◽  
Intrinsic Structure ◽  
Weak Beam ◽  
Grain Boundary Structure ◽  
Independent Information ◽  
Diffraction Patterns

There has been sustained interest over the last few years into both the intrinsic (primary and secondary) structure of grain boundaries and the extrinsic structure e.g. the interaction of matrix dislocations with the boundary. Most of the investigations carried out by electron microscopy have involved only the use of information contained in the transmitted image (bright field, dark field, weak beam etc.). Whilst these imaging modes are appropriate to the cases of relatively coarse intrinsic or extrinsic grain boundary dislocation structures, it is apparent that in principle (and indeed in practice, e.g. (1)-(3)) the diffraction patterns from the boundary can give extra independent information about the fine scale periodic intrinsic structure of the boundary.In this paper I shall describe one investigation into each type of structure using the appropriate method of obtaining the necessary information which has been carried out recently at Tribophysics.

Metallurgical Effects of Grain Boundary Ledges

1977 ◽  
Vol 35 ◽  
pp. 126-129
Author(s):  
L.E. Murr
Keyword(s):  
Grain Boundary ◽  
Quantitative Data ◽  
Mechanical Treatment ◽  
Unit Length ◽  
Physical And Mechanical Properties ◽  
Direct Observations ◽  
Transmission Electron ◽  
Properties Of Materials ◽  
Thermo Mechanical Treatment ◽  
Ledge Density

Ledges in grain boundaries can be identified by their characteristic contrast features (straight, black-white lines) distinct from those of lattice dislocations, for example1,2 [see Fig. 1(a) and (b)]. Simple contrast rules as pointed out by Murr and Venkatesh2, can be established so that ledges may be recognized with come confidence, and the number of ledges per unit length of grain boundary (referred to as the ledge density, m) measured by direct observations in the transmission electron microscope. Such measurements can then give rise to quantitative data which can be used to provide evidence for the influence of ledges on the physical and mechanical properties of materials.It has been shown that ledge density can be systematically altered in some metals by thermo-mechanical treatment3,4.

Measurement of the Displacement Across a Coincidence Grain Boundary

1977 ◽  
Vol 35 ◽  
pp. 124-125
Author(s):  
J. W. Matthews ◽  
W. M. Stobbs
Keyword(s):  
Grain Boundary ◽  
Grain Boundaries ◽  
Stacking Fault ◽  
The Other ◽  
Measuring Technique ◽  
High Angle ◽  
Twin Boundaries ◽  
Rigid Displacement ◽  
Cubic Crystals ◽  
Lattice Displacement

Many high-angle grain boundaries in cubic crystals are thought to be either coincidence boundaries (1) or coincidence boundaries to which grain boundary dislocations have been added (1,2). Calculations of the arrangement of atoms inside coincidence boundaries suggest that the coincidence lattice will usually not be continuous across a coincidence boundary (3). There will usually be a rigid displacement of the lattice on one side of the boundary relative to that on the other. This displacement gives rise to a stacking fault in the coincidence lattice.Recently, Pond (4) and Smith (5) have measured the lattice displacement at coincidence boundaries in aluminum. We have developed (6) an alternative to the measuring technique used by them, and have used it to find two of the three components of the displacement at {112} lateral twin boundaries in gold. This paper describes our method and presents a brief account of the results we have obtained.

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