scholarly journals Statistical analysis of the influence of temperature on microstructure contact surfaces on BaTiO3-ceramics doped with Ho2O3

2014 ◽  
Vol 46 (3) ◽  
pp. 345-352 ◽  
Author(s):  
S. Jankovic ◽  
V.V. Mitic ◽  
Lj. Kocic ◽  
V. Paunovic ◽  
M. Miljkovic
Keyword(s):  
Dielectric Properties ◽  
Fractal Geometry ◽  
Quantitative Metallography ◽  
Technological Parameters ◽  
Influence Of Temperature ◽  
New Correlation ◽  
Influence Of Temperature On ◽  
Contact Surfaces ◽  
Temperature Levels ◽  
Scanning Electron

The materials based on BaTiO3 can be controlled using different technological parameters and different additives. The influence of different temperature levels of sintering (1320?C, 1350?C and 1380?C) on the size of contact area for 0.1% Ho2O3 doped BaTiO3-ceramics has been investigated. Microstructural investigations were carried out using scanning electron microscopy (JEOL-JSM 5300) equipped with EDS (QX 2000S) system. Grain size distribution was determined by quantitative metallography method. The new correlation between microstructure and dielectric properties of doped BaTiO3-ceramics based on fractal geometry and contact surface probability is recently developed. The presented results indicate that statistical model of contact surfaces is important for the prognosis of BaTiO3-ceramics microstructure and dielectric properties.

Investigating the influence of temperature on electrospinning of polycaprolactone solutions

e-Polymers ◽  
2014 ◽  
Vol 14 (5) ◽  
pp. 323-333 ◽  
Author(s):  
Soghra Ramazani ◽  
Mohammad Karimi
Keyword(s):  
Electron Microscopy ◽  
Molecular Orientation ◽  
Fiber Diameter ◽  
Minimum Size ◽  
Effect Of Temperature ◽  
Electrospun Fibers ◽  
Influence Of Temperature ◽  
Set Point ◽  
Influence Of Temperature On ◽  
Scanning Electron

AbstractThe present work shows the effect of temperature on successfully obtained uniform electrospun poly-(ε-caprolactone) (PCL) fibers, with specific attention to the molecular orientation and diameter of nanofibers. Experiments were performed at temperatures (T) of 25°, 35°, and 45°C, and at PCL concentrations (w) of 12, 16, and 20 wt.%. Scanning electron microscopy provided the morphology of electrospun fibers and quantified their diameters. Elevated temperature for all PCL concentrations yielded a viscosity that allows for easier stretching of the jet to obtain a smaller diameter for fibers. A minimum size of the fiber diameter (close to 100 nm) was achieved for the set point T=45°C and w=12 and 16 wt.%. Due to the easy stretching of the jet by controlling the elastic property of the solution, a dichroic ratio of 1.62 was accessible for the set point T=35°C and w=12 wt.% from polarized Fourier transform infrared spectra as a factor for the orientation of PCL chains.

scholarly journals Impact of Heat on the Different Stages of the Production of Local Beer “Tchoukoutou” Made from Sorghum

2021 ◽  
Vol 37 (6) ◽  
pp. 1359-1365
Author(s):  
Adjo Cynthia Kouakou ◽  
Agbékonyi Kokou Agbodan ◽  
Kwami Lumo Awaga ◽  
Awèdéou Bakpo ◽  
Eyawèdeou Yelegue ◽  
...  
Keyword(s):  
Germination Rate ◽  
Effect Of Temperature ◽  
Soaking Time ◽  
Influence Of Temperature ◽  
Influence Of Temperature On ◽  
Temperature Ranges ◽  
The Subject ◽  
Temperature Levels ◽  
C 30

Tchoukoutou is a local alcoholic drink made from sorghum. The optimization and good quality of this drink depend on certain factors such as temperature that were the subject of our work. To carry out this study, we have set ourselves the general objective of structuring the production of Tchoukoutou. Specifically, the study aims to systematize the cooking of the wort, to verify the properties of the beer through tests and to produce a quality drink. An investigation was made on the influence of temperature on sorghum germination and wort cooking. The study of the effect of temperature on the germination of sorghum was carried out. It concerned four different temperature levels which are: 23 ° C, 26 ° C, 30 ° C and 35 ° C. A study of the influence of temperature on brewing was done with different varieties of sorghum and also at different temperature ranges: 78 ° C, 83 ° C, 89 ° C, and 92 ° C. The results showed that the ideal germination temperature is 30 ° C and for brewing it is 78 ° C. The soaking time during germination, for a good germination rate, is between 16h and 26h. In conclusion, the temperature factor is a parameter that should not be overlooked when making Tchoukoutou. Our study thus made will serve as a basis for subsequent studies in the same direction to achieve a standardized industrial production of Tchoukoutou.

Influence of Temperature on Rate of Regeneration in the Time-graded Regeneration Field in Planarians

Development ◽  
1961 ◽  
Vol 9 (1) ◽  
pp. 159-166
Author(s):  
Agnes Brøndsted ◽  
H. V. Brøndsted
Keyword(s):  
The Body ◽  
Influence Of Temperature ◽  
High Point ◽  
Know How ◽  
Influence Of Temperature On ◽  
Temperature Levels ◽  
Species Specific ◽  
Head Regeneration

There exists in planarians a time-graded regeneration field for head regeneration (Brøndsted, 1946, 1956; A. & H. V. Brøndsted, 1952). The characteristics of this field, expressed by rate of regeneration, are species-specific. The existence of this field ensures harmonious regeneration from cuts everywhere in the body, as a cut will always expose a ‘high point’ where regeneration of a head starts with greatest speed, thus taking the lead in organization and at the same time inhibiting head-forming tendencies elsewhere in the blastema (Brøndsted, 1956). The factors underlying these characteristics of the field are unknown; the problems involved are being attacked from several angles in our laboratory. For the sake of this work it is of some interest to know how the different rates of regeneration at various levels in the time-graded fields might be influenced by various temperature levels. Material and Methods The experiments were carried out on two species differing greatly in the characteristics of their time-graded regeneration fields.

scholarly journals Microstructure and Tribological Properties of Self-Lubricating FeS Coating Prepared by Chemical Bath Deposition Coating Technique

2019 ◽  
Vol 9 (20) ◽  
pp. 4422 ◽  
Author(s):  
Jianjun Hu ◽  
Chuan He ◽  
Xian Yang ◽  
Hui Li ◽  
Hongbin Xu ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Chemical Bath Deposition ◽  
Tribological Properties ◽  
Energy Dispersive Spectrometry ◽  
X Ray Diffraction ◽  
Influence Of Temperature ◽  
X Ray ◽  
Coating Technique ◽  
Influence Of Temperature On ◽  
Scanning Electron

The FeS solid lubricating coatings were prepared on the AISI 5140 steel by chemical bath deposition (CBD) coating technique at various temperatures from 30 to 90 °C. The influence of temperature on microstructure, microcracks, and tribological properties was characterized and studied by X-ray diffraction (XRD), scanning electron microscope (SEM), and energy dispersive spectrometry (EDS). The results show that the coating mainly consists of FexSy (FeS, FeS2, and Fe1−xS), and has a chrysanthemum-shaped (CS) morphology composed of the FeS crystal petals. The CS particles nucleate at about 30 °C, rapidly grow and reach a peak thickness at about 50–70 °C, and finally disappear and are replaced by disordered thick petals at 90 °C. The wear resistance of the steel was improved obviously after introducing of FeS coatings, owing to that the coatings can provide better lubrication and improve the wear resistance.

Study of the Influence of Temperature on the Optical and Structural Properties of Dolomite

2020 ◽  
Vol 74 (10) ◽  
pp. 1280-1286
Author(s):  
Lucas Train Loureço ◽  
Celso de Araujo Duarte ◽  
Dietmar William Foryta ◽  
Bruno Guimarães Titon ◽  
Eleonora Maria Gouvêa Vasconcellos
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Thermal Treatment ◽  
X Ray Diffraction ◽  
Electron Dispersive Spectroscopy ◽  
Influence Of Temperature ◽  
X Ray ◽  
Different Temperatures ◽  
Influence Of Temperature On ◽  
Scanning Electron

The present work reports the results of structural and optical investigations in samples of natural dolomite, subjected to thermal treatment at different temperatures (500 ℃ to 700 ℃) and times (one up to three hours). The motivation is the evaluation of the changes that may occur in carbonaceous asteroids and meteorites, respectively, subjected to the action of the solar radiation and heated during the fall in the atmosphere. We carried out scanning electron microscopy, electron dispersive spectroscopy, X-ray diffraction, optical reflectance and photoluminescence measurements

Influence of temperature on dielectric properties of Fe-doped CaCu3Ti4O12 ceramics

2010 ◽  
Vol 405 (1) ◽  
pp. 386-389 ◽  
Author(s):  
Chunhong Mu ◽  
Huaiwu Zhang ◽  
Ying He ◽  
Peng Liu
Keyword(s):  
Dielectric Properties ◽  
Influence Of Temperature ◽  
Influence Of Temperature On
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