EXPERIMENTAL EVIDENCE OF SULFUR EFFECT ON THE PLANE AND ON THE EXTRINSIC DISLOCATIONS OF A Σ = 3 GRAIN BOUNDARY IN NICKEL

1988 ◽  
Vol 49 (C5) ◽  
pp. C5-417-C5-422 ◽  
Author(s):  
D. BOUCHET ◽  
B. AUFRAY ◽  
L. PRIESTER
Keyword(s):  
Grain Boundary ◽  
Experimental Evidence ◽  
Sulfur Effect

Effect of La2O3 on the Microstructure and Electrical Properties of (Ti,Sn)O2 Varistor Ceramics

2010 ◽  
Vol 152-153 ◽  
pp. 1391-1394
Author(s):  
Mao Hua Wang ◽  
Gang Li ◽  
Chao Yao
Keyword(s):  
Electrical Properties ◽  
Grain Boundary ◽  
Experimental Evidence ◽  
Low Voltage ◽  
Nonlinear Coefficient ◽  
Electrical Characteristics ◽  
Electrical Behavior ◽  
Optimal Doping ◽  
Nonlinear Properties ◽  
Ceramic Sintering

(Ti,Sn)O2 varistors doped with different amount of La2O3 were obtained by ceramic sintering processing at 1250 . The effect of La2O3 on the microstructure and nonlinear electrical behavior of the (Ti,Sn)O2 ceramics were investigated. The ceramics have nonlinear coefficients of α=6.2–8.5. Experimental evidence shows that small quantities of La2O3 improve the nonlinear properties of the samples significantly. It was found that an optimal doping composition of 1.0mol% La2O3 leads to a low breakdown voltage of 18.1V/mm, a high nonlinear coefficient of 8.5, which is consistent with the highest and narrowest grain boundary barriers of the ceramics.In view of these electrical characteristics, the (Ti,Sn)O2 varistors with 1.0mol% La2O3 ceramic is a viable candidate for low voltage varistor devices. The characteristics of the ceramics can be explained by the effect of the substitution of La3+ for Ti4+ or Sn4+.

Possible evidence for overcoordination at semiconductor grain boundaries

1990 ◽  
Vol 5 (3) ◽  
pp. 587-592 ◽  
Author(s):  
W. Krakow ◽  
A. A. Levi ◽  
S. T. Pantelides
Keyword(s):  
High Resolution ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Experimental Evidence ◽  
Screw Dislocation ◽  
Electron Micrograph ◽  
Resolution Electron ◽  
Tilt Grain Boundary

The structure of a near coincidence Ge tilt grain boundary, containing a step, has been derived from a high resolution electron micrograph. There are two possible interpretations of portions of this interface, one of which is the existence of a sheet of fivefold coordinated atoms between the Σ = 19 and Σ = 27 coincidence misorientations. This finding may represent the first experimental evidence that overcoordinated atoms are present at semiconductor grain boundaries free of a screw dislocation.

TRANSPORT PROPERTIES OF JOSEPHSON JUNCTIONS AND SQUIDS EMPLOYING DIFFERENT TYPES OF YBCO GRAIN BOUNDARIES OBTAINED THROUGH THE BIEPITAXIAL TECHNIQUE

2000 ◽  
Vol 14 (25n27) ◽  
pp. 3074-3079 ◽  
Author(s):  
F. CARILLO ◽  
F. LOMBARDI ◽  
F. MILETTO GRANOZIO ◽  
V. PUNZO ◽  
F. RICCI ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Experimental Evidence ◽  
Transport Properties ◽  
Circuit Design ◽  
Quantum Interference ◽  
Superconducting Quantum Interference Devices ◽  
Different Types ◽  
Seed Layers

Concepts and experimental procedures to obtain different types of YBa 2 Cu 3 O 7 grain boundaries Josephson junction through the biepitaxial technique have been developed. Various seed layers (MgO, CeO 2 and SrTiO 3) and substrates (MgO, SrTiO 3) have been used providing, for the biepitaxial technique, additional flexibility in circuit design. A detailed investigation on transport properties evidenced good performances for both junctions and superconducting quantum interference devices. Experimental evidence is given of a conventional magnetic field behavior in 45° tilt Artificial Grain Boundary (AGB) for which no π-loops are predicted along the interface.

Experimental evidence for anomalous grain boundary diffusion of Fe in Cu and Cu-Fe alloys

2017 ◽  
Vol 133 ◽  
pp. 240-246 ◽  
Author(s):  
Daria Prokoshkina ◽  
Vladimir A. Esin ◽  
Sergiy V. Divinski
Keyword(s):  
Grain Boundary ◽  
Experimental Evidence ◽  
Boundary Diffusion ◽  
Grain Boundary Diffusion ◽  
Fe Alloys

How do memory modules differentially contribute to familiarity and recollection?

2019 ◽  
Vol 42 ◽  
Author(s):  
Olya Hakobyan ◽  
Sen Cheng
Keyword(s):  
Recognition Memory ◽  
Experimental Evidence ◽  
Subjective Experience ◽  
Target Article ◽  
Memory Modules ◽  
Familiarity And Recollection ◽  
Memory Contents

Abstract We fully support dissociating the subjective experience from the memory contents in recognition memory, as Bastin et al. posit in the target article. However, having two generic memory modules with qualitatively different functions is not mandatory and is in fact inconsistent with experimental evidence. We propose that quantitative differences in the properties of the memory modules can account for the apparent dissociation of recollection and familiarity along anatomical lines.

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