Influence of temperature and concentration on the densities and viscosities of solutions of CsNO3 in a low-melting nitrate melt

1984 ◽  
Vol 62 (1) ◽  
pp. 178-181 ◽  
Author(s):  
Maurice Abraham ◽  
Marie-Christine Abraham
Keyword(s):  
Mole Fraction ◽  
Short Range ◽  
Ionic Species ◽  
Linear Functions ◽  
Influence Of Temperature ◽  
Temperature Range ◽  
Arrhenius Relation

The densities and viscosities of solutions of CsNO3 in a low melting nitrate melt (AgNO3 + TlNO3) have been measured in the temperature range 371–403 K. The mole fraction XCs of CsNO3 in the solution was varied between 0 and 0.1. The viscosities follow an Arrhenius relation:[Formula: see text]in which both ln A and E* were found to be linear functions of XCs:[Formula: see text]These results are explained considering the preservation of ionic species in the mixtures when the mole fraction XCs is varied, and the assumption of the predominance of short range interactions.

Domain coarsening by grain boundary migration in ordered Ni4Mo

1986 ◽  
Vol 44 ◽  
pp. 560-561
Author(s):  
K. Vasudevan ◽  
H. P. Kao ◽  
C. R. Brooks ◽  
E. E. Stansbury
Keyword(s):  
Grain Boundary ◽  
Grain Boundaries ◽  
Short Range ◽  
Boundary Migration ◽  
Grain Boundary Migration ◽  
Rapid Cooling ◽  
Temperature Range ◽  
Fee Structure ◽  
Domain Coarsening ◽  
Boundary Reaction

The Ni4Mo alloy has a short-range ordered fee structure (α) above 868°C, but transforms below this temperature to an ordered bet structure (β) by rearrangement of atoms on the fee lattice. The disordered α, retained by rapid cooling, can be ordered by appropriate aging below 868°C. Initially, very fine β domains in six different but crystallographically related variants form and grow in size on further aging. However, in the temperature range 600-775°C, a coarsening reaction begins at the former α grain boundaries and the alloy also coarsens by this mechanism. The purpose of this paper is to report on TEM observations showing the characteristics of this grain boundary reaction.

Influence of Temperature on Hydraulic Conductivity in Compacted Bentonite

1997 ◽  
Vol 506 ◽  
Author(s):  
W. J. Cho ◽  
J. O. Lee ◽  
K. S. Chun
Keyword(s):  
Hydraulic Conductivity ◽  
Influence Of Temperature ◽  
Temperature Range ◽  
Compacted Bentonite ◽  
Influence Of Temperature On ◽  
Water Saturated ◽  
Increasing Temperature ◽  
Good Agreement

ABSTRACTThe hydraulic conductivities in water saturated bentonites at different densities were measured within temperature range of 20 to 80 °C. The results show that the hydraulic conductivities increase with increasing temperature. The hydraulic conductivities of bentonites at the temperature of 80 °C increase up to about 3 times as high as those at 20 °C. The measured values are in good agreement with those predicted. The change in viscosity of water with temperature contributes greatly to increase of hydraulic conductivity.

Influence of Temperature on Intratrack Processes and Ps Formation and Behaviour in Liquid Water

2008 ◽  
Vol 607 ◽  
pp. 213-217 ◽  
Author(s):  
Sergey V. Stepanov ◽  
Gilles Duplâtre ◽  
Vsevolod Byakov ◽  
V.S. Subrahmanyam ◽  
Dmitry Zvezhinskiy ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Liquid Water ◽  
Radical Reactions ◽  
Influence Of Temperature ◽  
Positron Annihilation Lifetime ◽  
Temperature Range ◽  
Diffusion Controlled ◽  
Temperature Dependences ◽  
Influence Of Temperature On

Positron annihilation lifetime (PAL) spectra are measured in liquid water in the temperature range 2 – 930C. The spectra are treated by taking into account intratrack reactions and assuming that radical reactions with Ps are diffusion-controlled (the respective temperature dependences obeying the Stokes-Einstein law). Equilibrium Ps bubble parameters are obtained.

The Effect of Sintering Temperature to the Properties of Zinc Oxide

2013 ◽  
Vol 795 ◽  
pp. 419-423 ◽  
Author(s):  
J.H. Lim ◽  
C.K. Yeoh ◽  
Pei Leng Teh ◽  
W.M. Arif ◽  
A. Chik
Keyword(s):  
Thermal Conductivity ◽  
Zinc Oxide ◽  
Thermal Properties ◽  
Solid State ◽  
Sintering Temperature ◽  
Solid State Method ◽  
Influence Of Temperature ◽  
Temperature Range ◽  
Influence Of Temperature On ◽  
State Method

In this paper, different sintering temperature used to study the influence of temperature on the structural and thermal properties of zinc oxide (ZnO). On this research, the sample was prepared by solid-state method for zinc oxide (ZnO) at different sintering temperature which was 700°C, 800°C and 900°C. It was observed that the density of bulk ZnO that sintering at 900°C had the higher value of density 5.03 g/cm3. The microhardness of the bulk ZnO had a higher measurement 397.3 Hv after sintered at 900°C. ZnO that sintering at 900°C had been observed that had thermal conductivity 1.1611W/cm-K in the sintering temperature range 700°C to 900°C.

The influence of temperature on selected strength properties of furniture particleboard

2019 ◽  
Vol 108 ◽  
pp. 128-134
Author(s):  
PIOTR BORYSIUK ◽  
ANNA TETELEWSKA ◽  
AURIGA RADOSŁAW ◽  
IZABELLA JENCZYK-TOŁŁOCZKO
Keyword(s):  
Strength Properties ◽  
Large Decrease ◽  
Influence Of Temperature ◽  
Temperature Range ◽  
Influence Of Temperature On ◽  
Negative Effect

The influence of temperature on selected strength properties of furniture particleboard. As a part of the study, the influence of temperature on selected properties of furniture particleboard was tested. P2 type industrial particleboards in three finishing options: raw boards (1), boards covered with melamine film in white (2) and black (3) (10 samples per variant) have been subjected to temperatures from -20oC to +120oC, at 10oC intervals. The Time of exposure for individual temperatures was 7 days. MOR, MOE and IB were determined for tested boards. It has been shown that temperatures above 50oC have a negative effect on strength properties of boards. A large decrease in all tested parameters was observed in the temperature range from +60oC to +120oC. It was also noted that finishing boards with melamine film did not improve their durability.

Mixed alkali effect in 0.2[xKNO3 + (1 − x)NaNO3] + 0.8glycerol systems

1994 ◽  
Vol 72 (11) ◽  
pp. 2286-2290 ◽  
Author(s):  
Sekh Mahiuddin
Keyword(s):  
Electrical Conductivity ◽  
Temperature Dependence ◽  
Mole Fraction ◽  
Linear Functions ◽  
Present System ◽  
Polarization Model ◽  
Mixed Alkali ◽  
Temperature Dependence Of Conductivity ◽  
Mixed Alkali Effect

Density, electrical conductivity, and fluidity of 0.2[xKNO3 + (1 − x)NaNO3] + 0.8glycerol systems were measured as functions of temperature (363.15 to428.15 K) and composition (0.0to 1.0 mole fraction). Densities were linear functions of temperature. The temperature dependence of conductivity and fluidity has been analysed by using the Vogel–Tammann–Fulcher (VTF) equation. Deviation from additivity has been observed in the electrical conductivity, fluidity isotherms to a lesser extent, and in electrical conductivity under isofluidity condition. The onset of the mixed alkali effect (MAE) in the present system has been explained by the anion polarization model.

Mixed anion effect in sodium thiocyanate + sodium thiosulfate + water systems

1998 ◽  
Vol 76 (12) ◽  
pp. 1836-1843 ◽  
Author(s):  
G Kalita ◽  
N N Dass ◽  
S Mahiuddin
Keyword(s):  
Key Words ◽  
Mole Fraction ◽  
Sodium Thiosulfate ◽  
Water Systems ◽  
Sodium Thiocyanate ◽  
Anion Effect ◽  
Temperature Range

Densities and viscosities of R[xNaSCN + (1 - x)Na2S2O3] + (1 - R)H2O systems with R = 0.05, 0.10, 0.14, and 0.18 were measured as functions of mole fraction, x (= 0.0-1.0), and temperature (293.15 <= T/K <= 323.15). A significant mixed anion effect has been observed within the temperature range of the study. The normalized viscosity isotherms were found to detect the mixed anion effect ~1.2 to 3.7 times more than the simple viscosity isotherms. The progressive replacement of S2O32- ions by SCN- ions causes the systems to be less structured and S2O32- ions polarized Na+ ions more towards themselves than towards the SCN- ions. Both these effects govern the variation of the viscosity with mole fraction, x. The mixed anion effect was found to vanish at around R = 0.0106.Key words: mixed anion effect, sodium thiocyanate, sodium thiosulfate, viscosity.

scholarly journals The influence of temperature and humidity on spore formation and germination inBacillus anthracis

1960 ◽  
Vol 58 (2) ◽  
pp. 177-186 ◽  
Author(s):  
D. G. Davies
Keyword(s):  
Relative Humidity ◽  
Spore Germination ◽  
Spore Formation ◽  
Influence Of Temperature ◽  
Germination Time ◽  
Temperature Range ◽  
Wide Range ◽  
Temperature And Humidity ◽  
Formed Part ◽  
Lower Temperature

Experiments performed on spore formation inB. anthracis, in a wide range of closed atmospheres of chemically controlled humidity, showed that the sporing time ofB. anthracisis prolonged considerably as the humidity decreases, both at 26 and 37° C. The effect is less noticeable at the lower temperature.Experiments performed on spore germination in the same organism showed that a temperature range of 20–44° C. permitted germination of the five strains tested. Above a temperature of 39° C. and below 30° C. germination time lengthened considerably.Experiments performed on the influence of humidity on spore germination, both at 26 and 37° C. showed that no germination could take place at a relative humidity of 80% or below. Germination time was considerably prolonged when the humidity value fell below 100%.This work formed part of a thesis for the degree of M.D. in Bristol University. I wish to thank Dr G. S. Wilson for his advice in preparing this paper.

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