Determination of the Kinetic Coefficients of Silicon Self‐Interstitials from Oxygen Precipitation/Front‐Surface Stacking‐Fault Growth Experiments

1991 ◽  
Vol 138 (11) ◽  
pp. 3492-3498 ◽  
Author(s):  
W. Boyd Rogers ◽  
Hisham Z. Massoud
Keyword(s):  
Front Surface ◽  
Stacking Fault ◽  
Oxygen Precipitation ◽  
Kinetic Coefficients ◽  
Fault Growth ◽  
Growth Experiments

A model for oxygen precipitation in silicon including bulk stacking fault growth

1995 ◽  
Vol 78 (11) ◽  
pp. 6469-6476 ◽  
Author(s):  
S. Senkader ◽  
J. Esfandyari ◽  
G. Hobler
Keyword(s):  
Stacking Fault ◽  
Oxygen Precipitation ◽  
Fault Growth

Modelinig of Dopant Diffusion and Associated Effects in Silicon

1982 ◽  
Vol 14 ◽  
Author(s):  
Richard B. Fair
Keyword(s):  
Point Defects ◽  
Stacking Fault ◽  
Relative Importance ◽  
Dopant Diffusion ◽  
Oxygen Precipitation ◽  
Fault Growth

ABSTRACTResearch in the area of dopant diffusion in Si has focused on identifying the specific mechanisms and point defects involved. Recent approaches include observing the effects of diffusion and doping on oxygen precipitation, stacking fault growth or shrinkage, enhanced/retarded diffusion of one dopant in the presence of another. Very few of these studies have yielded unambiguous interpretations as a result of the indirect nature of the experiments. However, taken together we can infer the relative importance of vacancies versus Si selfinterstitials in the diffusion of each dopant species.

On effects of non-systematic reflections on weak-beam images of partial dislocations

1991 ◽  
Vol 49 ◽  
pp. 688-689
Author(s):  
K. Z. Botros ◽  
S. S. Sheinin
Keyword(s):  
High Precision ◽  
Stacking Fault ◽  
Important Application ◽  
Stacking Fault Energy ◽  
Sharp Peak ◽  
Weak Beam ◽  
Partial Dislocations ◽  
Deviation Parameter ◽  
Beam Diffraction

The main features of weak beam images of dislocations were first described by Cockayne et al. using calculations of intensity profiles based on the kinematical and two beam dynamical theories. The feature of weak beam images which is of particular interest in this investigation is that intensity profiles exhibit a sharp peak located at a position very close to the position of the dislocation in the crystal. This property of weak beam images of dislocations has an important application in the determination of stacking fault energy of crystals. This can easily be done since the separation of the partial dislocations bounding a stacking fault ribbon can be measured with high precision, assuming of course that the weak beam relationship between the positions of the image and the dislocation is valid. In order to carry out measurements such as these in practice the specimen must be tilted to "good" weak beam diffraction conditions, which implies utilizing high values of the deviation parameter Sg.

scholarly journals Determination of kinetic coefficients for treating synthetic oily wastewater in suspended growth batch fed reactor

2021 ◽  
Author(s):  
P. Sanghamitra ◽  
Debabrata Mazumder ◽  
Somnath Mukherjee
Keyword(s):  
Real Life ◽  
Oily Wastewater ◽  
Efficient Design ◽  
Oil And Grease ◽  
Property A ◽  
Kinetic Coefficients ◽  
Suspended Growth ◽  
Suspended Biomass ◽  
High Level

Abstract Discharge of oily wastewater imparts serious threat to the environment because of high level concentration of COD, BOD as well as oil and grease and it is difficult to treat such wastewater due to its inherent toxic and inhibitory property. A treatability study of oily wastewater (carrying petroleum) has been performed in the present work using a batch suspended growth reactor. The experiment was conducted using acclimatized suspended biomass in laboratory environment and the kinetic coefficients were determined which are immensely important for design of such reactor. The oil removal efficiency was observed to be in the range of 62.84–85.45% corresponding to average MLSS concentration range of 1,797–3,668 mg/L. Haldane kinetic model was found to be the best fitted for the biodegradation of oily wastewater with acclimatised microorganisms in the present investigation. The kinetic co-efficients including Ks, Y, kd, k and ki were calculated from the experimental data and the values were compared with published results cited by various scientists. The derived kinetic coefficients values are to be useful for understanding the dynamics of substrate utilisation with production of biomass and efficient design of biological systems and also for pilot plant investigation with real life wastewater of similar nature.

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