Influence of Structural Distortion on Physical Properties of Yttria-Zirconia-Alumina Nanoparticles

2011 ◽  
Vol 6 (1) ◽  
pp. 14-23
Author(s):  
J. Santoyo-Salazar ◽  
J. Tartaj
Keyword(s):  
Physical Properties ◽  
Structural Distortion ◽  
Alumina Nanoparticles

Effect of Nanoparticles on the Fuel Properties and Spray Performance of Aviation Turbine Fuel

2016 ◽  
Vol 139 (3) ◽  
Author(s):  
Kumaran Kannaiyan ◽  
Kanjirakat Anoop ◽  
Reza Sadr
Keyword(s):  
Surface Tension ◽  
Physical Properties ◽  
Droplet Diameter ◽  
Cone Angle ◽  
Aviation Fuel ◽  
Alumina Nanoparticles ◽  
Spray Cone Angle ◽  
Spray Cone ◽  
Breakup Length ◽  
Sheet Breakup

The influence of nanoparticles' dispersion on the physical properties of aviation fuel and its spray performance has been investigated in this work. To this end, the conventional Jet A-1 aviation fuel and its mixtures with alumina nanoparticles (nanofuel) at different weight concentrations are investigated. The key fuel physical properties such as density, viscosity, and surface tension that are of importance to the fuel atomization process are measured for the base fuel and nanofuels. The macroscopic spray features like spray cone angle and sheet breakup length are determined using the shadowgraph technique. The microscopic spray characteristics such as droplet diameter, droplet velocity, and their distributions are also measured by employing phase Doppler anemometry (PDA) technique. The spray performance is measured at two nozzle injection pressures of 0.3 and 0.9 MPa. The results show that with the increase in nanoparticle concentrations in the base fuel, the fuel viscosity and density increase, whereas the surface tension decreases. On the spray performance, the liquid sheet breakup length decreases with increasing nanoparticle concentrations. Furthermore, the mean droplet diameters of nanofuel are found to be lower than those of the base fuel.

Structural Distortion and Physical Properties in Double-Layered Ruthenate Sr3-xCaxRu2O7

2008 ◽  
Vol 77 (10) ◽  
pp. 104716 ◽  
Author(s):  
Kotaro Iwata ◽  
Yoshiyuki Yoshida ◽  
Masashi Kosaka ◽  
Susumu Katano
Keyword(s):  
Physical Properties ◽  
Structural Distortion

The metal halide structure and the extent of distortion control the photo-physical properties of luminescent zero dimensional organic-antimony(iii) halide hybrids

2021 ◽  
Vol 9 (1) ◽  
pp. 348-358
Author(s):  
Anupam Biswas ◽  
Rangarajan Bakthavatsalam ◽  
Bhupendra P. Mali ◽  
Vir Bahadur ◽  
Chinmoy Biswas ◽  
...  
Keyword(s):  
Physical Properties ◽  
Stokes Shift ◽  
Metal Halide ◽  
Structural Distortion ◽  
Emission Energy ◽  
Distortion Control ◽  
Pl Emission ◽  
Distortion Mechanism

The structural tunability of 0D Sb Cl based hybrid perovskites and the underlying structural distortion mechanism affecting their emissive properties (PL emission energy, PLQY, Stokes shift) are demonstrated here.

Experimental Investigation of Thermo-Physical Properties of Al2O3 Nanofluid on Commercially Available Blue Dyed Kerosene for Low Volume Concentration

2017 ◽  
Vol 17 ◽  
pp. 156-165
Author(s):  
Aldin Justin Sundararaj ◽  
B.C. Pillai ◽  
Lazarus Godson Asirvatham ◽  
A.N. Subash ◽  
Kirthana Stephen
Keyword(s):  
Surface Tension ◽  
Physical Properties ◽  
Volume Concentration ◽  
Sem Analysis ◽  
Nano Particles ◽  
Alumina Nanoparticles ◽  
Effect Of Temperature ◽  
Alumina Nanofluid ◽  
Low Volume ◽  
Thermo Physical Properties

The current work involves the measurement of thermo physical properties of commercial available blue dyed Kerosene, examining their behavior with alumina nano particles. It was found that the particle size of alumina ranged from 32 nm – 50 nm from the scanning electron microscope (SEM) analysis. Low volume concentrations (0.01%, 0.05% and 0.10% by volume) were used for this study. The parameters studied were thermal conductivity, viscosity and surface tension. The study was conducted at different range of temperatures (25-60 °C). Oleic acid was added as surfactant and the nanofluid was found to be stable for more than a week. The conductivity of the blue dyed kerosene alumina nanofluid increased with an increase in temperature and volume concentration. An enhancement of 9.33 % in conductivity was observed with a temperature of 60 °C for a volume concentration of 0.10%. The viscosity of the blue dyed kerosene decreased with increase in temperature. An average enhancement of 20% in viscosity of blue dyed kerosene alumina nanoparticles has been noted for a volume concentration of 0.10% as compared to the base kerosene. The surface tension of the kerosene alumina nanofluid decreased with an increase in temperature and decrease in concentration. An enhancement of 7.9 % in surface tension has been noted for volume concentration of 0.1% as compared to base kerosene at same temperature. The effect of temperature on thermo physical properties was determined by a linear decrease in surface tension as the temperature was raised. The results provide a strong proof that the addition of nano particles intensified the thermo physical properties to a considerable rate.

The Photometric Properties of the Ap Stars

1976 ◽  
Vol 32 ◽  
pp. 365-377 ◽  
Author(s):  
B. Hauck
Keyword(s):  
Physical Properties ◽  
Ap Stars

The Ap stars are numerous - the photometric systems tool It would be very tedious to review in detail all that which is in the literature concerning the photometry of the Ap stars. In my opinion it is necessary to examine the problem of the photometric properties of the Ap stars by considering first of all the possibility of deriving some physical properties for the Ap stars, or of detecting new ones. My talk today is prepared in this spirit. The classification by means of photoelectric photometric systems is at the present time very well established for many systems, such as UBV, uvbyβ, Vilnius, Geneva and DDO systems. Details and methods of classification can be found in Golay (1974) or in the proceedings of the Albany Colloquium edited by Philip and Hayes (1975).

A Freeze-Etch Study of Acinetobacter SP. Grown on a Hydrocarbon Substrate

1974 ◽  
Vol 32 ◽  
pp. 174-175
Author(s):  
C. L. Scott ◽  
W. R. Finnerty
Keyword(s):  
Membrane System ◽  
Structural Distortion ◽  
Intracytoplasmic Membrane ◽  
Gram Negative ◽  
Sectioned Material ◽  
Acinetobacter Sp

Acinetobacter sp. HO-1-N, a gram-negative hydrocarbon oxidizing bacterium previously designated Micrococcus cerificans, has been shown to sequester the hydrocarbon into intracytoplasmic pools as a result of growth on this substrate. In hydrocarbon grown cells, an intracytoplasmic membrane system was also observed along with a doubling of cellular phospholipids (Z). However, using conventional dehydration and embedding procedures in preparing thin sectioned material, the hydrocarbon is extracted from the cells. This may lead to structural distortion, consequently, the freeze-etch technique was applied to preserve the integrity of the cell.

The Infection of Cells by Bullet-Shaped Viruses

1969 ◽  
Vol 27 ◽  
pp. 372-373
Author(s):  
Frederick A. Murphy ◽  
Alyne K. Harrison ◽  
Sylvia G. Whitfield
Keyword(s):  
Electron Microscopy ◽  
Physical Properties ◽  
Host Cell ◽  
Thin Section ◽  
Cultured Cells ◽  
Cell Infection ◽  
Thin Section Electron Microscopy ◽  
Section Electron ◽  
Section Electron Microscopy

The bullet-shaped viruses are currently classified together on the basis of similarities in virion morphology and physical properties. Biologically and ecologically the member viruses are extremely diverse. In searching for further bases for making comparisons of these agents, the nature of host cell infection, both in vivo and in cultured cells, has been explored by thin-section electron microscopy.

Transmission electron microscopy of composite materials

1988 ◽  
Vol 46 ◽  
pp. 1012-1015
Author(s):  
K.P.D. Lagerlof
Keyword(s):  
Composite Materials ◽  
Physical Properties ◽  
Structural Defects ◽  
Structural Composites ◽  
Multiphase Materials ◽  
Structural Reinforcement ◽  
Transmission Electron ◽  
Reinforced Fiber ◽  
Particulate Reinforced Composites ◽  
Definition Of

Although most materials contain more than one phase, and thus are multiphase materials, the definition of composite materials is commonly used to describe those materials containing more than one phase deliberately added to obtain certain desired physical properties. Composite materials are often classified according to their application, i.e. structural composites and electronic composites, but may also be classified according to the type of compounds making up the composite, i.e. metal/ceramic, ceramic/ceramie and metal/semiconductor composites. For structural composites it is also common to refer to the type of structural reinforcement; whisker-reinforced, fiber-reinforced, or particulate reinforced composites [1-4].For all types of composite materials, it is of fundamental importance to understand the relationship between the microstructure and the observed physical properties, and it is therefore vital to properly characterize the microstructure. The interfaces separating the different phases comprising the composite are of particular interest to understand. In structural composites the interface is often the weakest part, where fracture will nucleate, and in electronic composites structural defects at or near the interface will affect the critical electronic properties.

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