Guidelines for the characterization of dispersion stability

2015 ◽  
Keyword(s):  
Dispersion Stability

Synthesis of TiO2 – Water Nanofluids for its Viscosity and Dispersion Stability Study

2013 ◽  
Vol 24 ◽  
pp. 26-33 ◽  
Author(s):  
Rohit S. Khedkar ◽  
Shriram S. Sonawane ◽  
Kalais L. Wasewar
Keyword(s):  
Research Work ◽  
Titanium Isopropoxide ◽  
Stability Study ◽  
Dispersion Stability ◽  
Titanium Dioxide Nanoparticle ◽  
Unique Method ◽  
Increasing Trends ◽  
Hydrolysis Of ◽  
Dispersion Of Nanoparticles

In the present research work, an anatase structure titanium dioxide nanoparticle was synthesized by hydrolysis of titanium isopropoxide in the presence and absence of ultrasonication. The resultant product suspension was peptized for getting narrow size distribution. The synthesized nanoparticles are used for preparation of nanofluids with different volume percent loading of nanoparticles in water ranging from 1% to 5%. The characterization of particles was carried out by TEM, XRD. Our result shows that the use of ultrasonic technique has a significant effect on the homogeneity and then size of TiO2nanoparticles. Viscosity of nanofluids was demonstrated with rheometer (TA instruments). Viscosity results confirmed Newtonian behavior of nanofluids and showing increasing trends with addition of nanoparticles in base fluids. The dispersion of nanoparticles in nanofluids is studied with unique method of UV visible spectrophotometer, which confirm good dispersion stability prepared nanofluid of 50 hrs.

In-situ characterization of dispersion stability of WO3 nanoparticles and nanowires

2007 ◽  
Vol 10 (4) ◽  
pp. 599-612 ◽  
Author(s):  
Mehmet Kozan ◽  
Jyothish Thangala ◽  
Rahel Bogale ◽  
M. Pinar Mengüç ◽  
Mahendra K. Sunkara
Keyword(s):  
Dispersion Stability ◽  
In Situ Characterization

scholarly journals Studies on sedimentation of asphaltene deposits in distillation residues

2007 ◽  
Vol 1 (3) ◽  
pp. 165-173
Author(s):  
Aneta Lorek ◽  
◽  
Maciej Paczuski ◽  
Keyword(s):  
Analytical Techniques ◽  
Experimental Methods ◽  
Dispersion Stability ◽  
Surface Active ◽  
Distillation Residues ◽  
Modern Analytical ◽  
Active Substances

In this work, experimental methods used for the evaluation of stability of solids in liquids dispersions, are presented. For the characterization of dispersion components, modern analytical techniques, such as tensiometry, scanning and static turbidimetry, have been applied. The influence of selected surface active substances on the dispersion stability was demonstrated.

scholarly journals Improvement of dispersion stability and characterization of upconversion nanophosphors covalently modified with PEG as a fluorescence bioimaging probe

2008 ◽  
Vol 43 (15) ◽  
pp. 5325-5330 ◽  
Author(s):  
Tamotsu Zako ◽  
Hiroyasu Nagata ◽  
Naofumi Terada ◽  
Masafumi Sakono ◽  
Kohei Soga ◽  
...  
Keyword(s):  
Dispersion Stability ◽  
Fluorescence Bioimaging

Morphological Characterization of Mycobacteriophage R1

1974 ◽  
Vol 32 ◽  
pp. 254-255
Author(s):  
B. L. Soloff ◽  
T. A. Rado
Keyword(s):  
Carbon Source ◽  
Stationary Phase ◽  
Growth Phase ◽  
Minimal Medium ◽  
Morphological Characterization ◽  
Logarithmic Growth Phase ◽  
Complete Lysis ◽  
Lysogenic Culture ◽  
Logarithmic Growth

Mycobacteriophage R1 was originally isolated from a lysogenic culture of M. butyricum. The virus was propagated on a leucine-requiring derivative of M. smegmatis, 607 leu−, isolated by nitrosoguanidine mutagenesis of typestrain ATCC 607. Growth was accomplished in a minimal medium containing glycerol and glucose as carbon source and enriched by the addition of 80 μg/ ml L-leucine. Bacteria in early logarithmic growth phase were infected with virus at a multiplicity of 5, and incubated with aeration for 8 hours. The partially lysed suspension was diluted 1:10 in growth medium and incubated for a further 8 hours. This permitted stationary phase cells to re-enter logarithmic growth and resulted in complete lysis of the culture.

AEM analysis of crystallization in Ti-based amorphous alloys

1983 ◽  
Vol 41 ◽  
pp. 270-271
Author(s):  
A.R. Pelton ◽  
A.F. Marshall ◽  
Y.S. Lee
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloys ◽  
Amorphous Materials ◽  
Isothermal Annealing ◽  
Amorphous Matrix ◽  
Nucleation And Growth ◽  
Current Interest ◽  
Amorphous Films ◽  
Electrical And Magnetic Properties

Amorphous materials are of current interest due to their desirable mechanical, electrical and magnetic properties. Furthermore, crystallizing amorphous alloys provides an avenue for discerning sequential and competitive phases thus allowing access to otherwise inaccessible crystalline structures. Previous studies have shown the benefits of using AEM to determine crystal structures and compositions of partially crystallized alloys. The present paper will discuss the AEM characterization of crystallized Cu-Ti and Ni-Ti amorphous films.Cu60Ti40: The amorphous alloy Cu60Ti40, when continuously heated, forms a simple intermediate, macrocrystalline phase which then transforms to the ordered, equilibrium Cu3Ti2 phase. However, contrary to what one would expect from kinetic considerations, isothermal annealing below the isochronal crystallization temperature results in direct nucleation and growth of Cu3Ti2 from the amorphous matrix.

Characterization of Coherent, Ordered Precipitates in Nickel-Base Alloys

1973 ◽  
Vol 31 ◽  
pp. 144-145
Author(s):  
B. H. Kear ◽  
J. M. Oblak
Keyword(s):  
Stable Phase ◽  
Nickel Base Superalloy ◽  
Alloy 718 ◽  
Commercial Alloy ◽  
Precipitate Morphology ◽  
Continuous Precipitation ◽  
Nickel Base ◽  
Base Superalloy ◽  
Strengthening Precipitate

A nickel-base superalloy is essentially a Ni/Cr solid solution hardened by additions of Al (Ti, Nb, etc.) to precipitate a coherent, ordered phase. In most commercial alloy systems, e.g. B-1900, IN-100 and Mar-M200, the stable precipitate is Ni3 (Al,Ti) γ′, with an LI2structure. In A lloy 901 the normal precipitate is metastable Nis Ti3 γ′ ; the stable phase is a hexagonal Do2 4 structure. In Alloy 718 the strengthening precipitate is metastable γ″, which has a body-centered tetragonal D022 structure.Precipitate MorphologyIn most systems the ordered γ′ phase forms by a continuous precipitation re-action, which gives rise to a uniform intragranular dispersion of precipitate particles. For zero γ/γ′ misfit, the γ′ precipitates assume a spheroidal.

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