scholarly journals Time dependent effects and transport evidence for phase separation in La0.5Ca0.5MnO3

2000 ◽  
Vol 87 (9) ◽  
pp. 5831-5833 ◽  
Author(s):  
M. Roy ◽  
J. F. Mitchell ◽  
P. Schiffer
Keyword(s):  
Phase Separation ◽  
Time Dependent

Microstructure development in furfuryl resin-derived microporous glassy carbons

1996 ◽  
Vol 11 (9) ◽  
pp. 2338-2345 ◽  
Author(s):  
Kristen Persels Constant ◽  
Jonq-Ren Lee ◽  
Yet-Ming Chiang
Keyword(s):  
Phase Separation ◽  
Ethylene Glycol ◽  
Glassy Carbon ◽  
Thermal History ◽  
Liquid State ◽  
Furfuryl Alcohol ◽  
Time Dependent ◽  
Miscibility Gap ◽  
Microstructure Development

The processing of microporous glassy carbon derived from furfuryl alcohol and ethylene glycol mixtures has been studied, with emphasis on understanding and controlling microstructure development. It is shown that this system exhibits a polymerization-dependent miscibility gap, and that the carbon microstructure is determined by phase separation in the liquid state. Variations in carbon microstructure with composition and thermal history can be understood in terms of the time-dependent immiscibility and resulting phase separation.

scholarly journals Pressure-induced phase separation of miscible liquids: 1 : 1 n-pentane/iso-pentane

CrystEngComm ◽  
2020 ◽  
Vol 22 (47) ◽  
pp. 8251-8255
Author(s):  
X. Liu ◽  
C. R. Pulham
Keyword(s):  
Phase Separation ◽  
Time Dependent ◽  
Miscible Liquids

We report the unexpected pressure-induced and time-dependent nucleation and crystallisation of n-pentane from a 1 : 1 mixture of n-pentane and iso-pentane.

Time dependent light scattering studies of phase separation in polymer blends

1983 ◽  
Vol 78 (6) ◽  
pp. 3334-3336 ◽  
Author(s):  
H. L. Snyder ◽  
Paul Meakin ◽  
S. Reich
Keyword(s):  
Phase Separation ◽  
Light Scattering ◽  
Polymer Blends ◽  
Time Dependent

Numerical investigation of the growth kinetics for macromolecular microsphere composite hydrogel based on the TDGL equation

2016 ◽  
Vol 15 (08) ◽  
pp. 1650064
Author(s):  
Dating Wu ◽  
Hui Zhang
Keyword(s):  
Phase Separation ◽  
Numerical Investigation ◽  
Growth Kinetics ◽  
Pair Correlation ◽  
Domain Size ◽  
Time Dependent ◽  
Domain Growth ◽  
Ginzburg Landau ◽  
Tdgl Equation ◽  
Kinetics Of

We present results of a detailed numerical investigation of the phase separation kinetic process of the macromolecular microsphere composite (MMC) hydrogel. Based on the Flory-Huggins-de Gennes-like reticular free energy, we use the time-dependent Ginzburg–Landau (TDGL) mesoscopic model (called MMC-TDGL model) to simulate the phase separation process. Domain growth is investigated through the pair correlation function. Then we obtain the time-dependent characteristic domain size, which reflects the growth kinetics of the MMC hydrogel. The results indicate that the growth law based on the MMC-TDGL equation is consistent with the modified Lifshitz–Slyozov theory.

Bulk standards for low-temperature biological x-ray microanalysis

1984 ◽  
Vol 42 ◽  
pp. 282-283
Author(s):  
P. Echlin ◽  
M. McKoon ◽  
E.S. Taylor ◽  
C.E. Thomas ◽  
K.L. Maloney ◽  
...  
Keyword(s):  
Phase Separation ◽  
Low Temperature ◽  
Analytical Method ◽  
Salt Solutions ◽  
Absolute Concentration ◽  
Cooling Process ◽  
X Ray ◽  
The Absolute ◽  
Analytical Procedures ◽  
Electrical Conductors

Although sections of frozen salt solutions have been used as standards for x-ray microanalysis, such solutions are less useful when analysed in the bulk form. They are poor thermal and electrical conductors and severe phase separation occurs during the cooling process. Following a suggestion by Whitecross et al we have made up a series of salt solutions containing a small amount of graphite to improve the sample conductivity. In addition, we have incorporated a polymer to ensure the formation of microcrystalline ice and a consequent homogenity of salt dispersion within the frozen matrix. The mixtures have been used to standardize the analytical procedures applied to frozen hydrated bulk specimens based on the peak/background analytical method and to measure the absolute concentration of elements in developing roots.

Phase separation in sol gel-derived ceramic films of silica-zirconia, alumina-zirconia, and titania-zirconia system

1994 ◽  
Vol 52 ◽  
pp. 646-647
Author(s):  
J. Tong ◽  
L. Eyring
Keyword(s):  
Fracture Toughness ◽  
Phase Separation ◽  
Sol Gel ◽  
Great Influence ◽  
High Strength ◽  
Chemical Durability ◽  
Separation Method ◽  
Toughening Mechanism ◽  
Ceramic Films ◽  
Zirconia Toughened Alumina

There is increasing interest in composites containing zirconia because of their high strength, fracture toughness, and its great influence on the chemical durability in glass. For the zirconia-silica system, monolithic glasses, fibers and coatings have been obtained. There is currently a great interest in designing zirconia-toughened alumina including exploration of the processing methods and the toughening mechanism.The possibility of forming nanocrystal composites by a phase separation method has been investigated in three systems: zirconia-alumina, zirconia-silica and zirconia-titania using HREM. The morphological observations initially suggest that the formation of nanocrystal composites by a phase separation method is possible in the zirconia-alumina and zirconia-silica systems, but impossible in the zirconia-titania system. The separation-produced grain size in silica-zirconia system is around 5 nm and is more uniform than that in the alumina-zirconia system in which the sizes of the small polyhedron grains are around 10 nm. In the titania-zirconia system, there is no obvious separation as was observed in die alumina-zirconia and silica-zirconia system.

Phase separation in fluid additive hard sphere mixtures?

1998 ◽  
Vol 95 (2) ◽  
pp. 131-135 ◽  
Author(s):  
DOUGLAS HENDERSON DEZSO BODA KWONG-YU CHAN
Keyword(s):  
Phase Separation ◽  
Hard Sphere
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