Pure and zirconium-doped manganese(II,III) oxide: Investigations on structural and conduction-related properties within the Lattice Compatibility Theory scope

2015 ◽  
Vol 40 ◽  
pp. 224-229 ◽  
Author(s):  
L. Ben Said ◽  
T. Larbi ◽  
A. Yumak ◽  
K. Boubaker ◽  
M. Amlouk
Keyword(s):  
Compatibility Theory

scholarly journals Suppression of abnormal grain growth in K0.5Na0.5NbO3: phase transitions and compatibility

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Patricia Pop-Ghe ◽  
Norbert Stock ◽  
Eckhard Quandt
Keyword(s):  
Phase Transitions ◽  
Grain Growth ◽  
Abnormal Grain Growth ◽  
Major Influence ◽  
Powder Morphology ◽  
Precise Control ◽  
Multi Scale ◽  
Calcination Duration ◽  
Microstructural Integrity ◽  
Compatibility Theory

AbstractThis work presents the suppression of abnormal grain growth in bulk ceramic K0.5Na0.5NbO3 (KNN). The suppression is enabled by precise control of the starting powder morphology through match of milling and calcination duration. A comparative temperature-dependent analysis of the resulting sample morphology, phase transitions and related electronic material properties reveals that abnormal grain growth is indeed a major influence in material property deterioration, as has theoretically been suggested in other works. However, it is shown that this abnormal grain growth originates from the calcined powder and not from sintering and that all subsequent steps mirror the initial powder morphology. In specific, the results are discussed with respect to the predictions of the compatibility theory and microstructure. Despite the material’s multi-scale heterogeneity, the suppression of abnormal grain growth allows for the achievement of significantly improved functional properties and it is reported that this development is correctly predicted by the compatibility theory within the borders of microstructural integrity. It could be demonstrated that functional fatigue is strongly minimised, while thermal and electronic properties are improved when abnormal grain growth is suppressed by powder morphology control.

scholarly journals Structural Investigation of Photocatalyst Solid Ag1−xCuxInS2 Quaternary Alloys Sprayed Thin Films Optimized within the Lattice Compatibility Theory (LCT) Scope

2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
A. Colantoni ◽  
L. Longo ◽  
K. Boubaker
Keyword(s):  
Thin Films ◽  
Lattice Mismatch ◽  
Lattice Structure ◽  
Low Cost ◽  
Buffer Layers ◽  
X Ray Diffraction ◽  
Quaternary Alloys ◽  
Solid Thin Films ◽  
Compatibility Theory ◽  
Copper Incorporation

CuxAg1−xInS2 solid thin films were fabricated through a low-cost process. Particular process-related enhanced properties lead to reaching a minimum of lattice mismatch between absorber and buffer layers within particular solar cell devices. First, copper-less samples X-ray diffraction analysis depicts the presence of AgInS2 ternary compound in chalcopyrite tetragonal phase with privileged (112) peak (d112=1.70 Å) according to JCPDS 75-0118 card. Second, when x content increases, we note a shift of the same preferential orientation (112) and its value reaches 1.63 Å corresponding to CuInS2 chalcopyrite tetragonal material according to JCPDS 89-6095 file. Finally, the formation and stability of these quaternaries have been discussed in terms of the lattice compatibility in relation with silver-copper duality within indium disulfide lattice structure. Plausible explanations for the extent and dynamics of copper incorporation inside AgInS2 elaborated ternary matrices have been proposed.

Analysis of Power Transaction Space Model between Power Users and Generators Based on Incentive Compatibility Theory

2015 ◽  
Vol 1092-1093 ◽  
pp. 414-417
Author(s):  
Chun Cheng Gao ◽  
Li Tao ◽  
Shu Hong Shi ◽  
Dun Nan Liu
Keyword(s):  
Power Generation ◽  
Incentive Compatibility ◽  
Power Generators ◽  
Space Model ◽  
Incentive Compatible ◽  
Direct Trade ◽  
Compatibility Theory

There are various difficulties between power generators and power users during direct trade. The current direct trade rules and patterns cannot guarantee the interests of all parties directly related to the transaction, which is one of important reasons. Direct transaction space model of incentive compatible principles is proposed in this paper. How to guarantee the interests of grid, generators and big users during direct transaction is analyzed. For power generation companies, large users and grids, the change of interests are analyzed and marginal decision condition is studied. Based on the principle of incentive compatibility, direct transaction space model which not damage the interests of three transaction bodies is analyzed.

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