Viscosity of diallyl ether within the temperature range 291.7?626.6 K and within the pressure range 0.101?58.86 MPa

1996 ◽  
Vol 68 (4) ◽  
pp. 506-508
Author(s):  
M. M. Safarov ◽  
R. Sh. Asoev
Keyword(s):  
Pressure Range ◽  
Temperature Range ◽  
Diallyl Ether

Dynamic Viscosity of Compressed Water to 10 Kilobar and Steam to 1500°C

1969 ◽  
Vol 11 (2) ◽  
pp. 189-205 ◽  
Author(s):  
E. A. Bruges ◽  
M. R. Gibson
Keyword(s):  
Gaseous Phase ◽  
Dynamic Viscosity ◽  
Low Temperatures ◽  
Pressure Range ◽  
Low Pressure ◽  
Temperature Range ◽  
Inversion Temperature ◽  
Pressure Steam ◽  
Correlating Equations ◽  
First Time

Equations specifying the dynamic viscosity of compressed water and steam are presented. In the temperature range 0-100cC the location of the inversion locus (mu) is defined for the first time with some precision. The low pressure steam results are re-correlated and a higher inversion temperature is indicated than that previously accepted. From 100 to 600°C values of viscosity are derived up to 3·5 kilobar and between 600 and 1500°C up to 1 kilobar. All the original observations in the gaseous phase have been corrected to a consistent set of densities and deviation plots for all the new correlations are given. Although the equations give values within the tolerances of the International Skeleton Table it is clear that the range and tolerances of the latter could with some advantage be revised to give twice the existing temperature range and over 10 times the existing pressure range at low temperatures. A list of the observations used and their deviations from the correlating equations is available as a separate publication.

scholarly journals Conditions of ore formation of the Aunikskoye F-Be deposit (Western Transbaikal)

2019 ◽  
Vol 61 (1) ◽  
pp. 18-38
Author(s):  
L. B. Damdinova ◽  
B. B. Damdinov ◽  
M. O. Rampilov ◽  
S. V. Kanakin
Keyword(s):  
Pressure Range ◽  
Deposition Process ◽  
Isotopic Signature ◽  
Ore Deposits ◽  
Ore Formation ◽  
Ore Deposit ◽  
Temperature Range ◽  
Main Factors ◽  
Low Solubility

This study examines the compositions of the ore and the ore formation solutions, conditions of formation, and sources of Be mineralization using the Aunikskoye F-Be deposit, which is an integral part of the Western Transbaikal beryllium-bearing provinces, as a representative example. Further, the main factors responsible for the formation of beryllium mineralization were evaluated. The ore deposits are presented by the feldsparic–fluorspar–phenacite–bertrandite metasomatites formed in the carboniferous limestones during their metasomatic alternation with hydrothermal solutions by introducing F, Be, and other associated elements. The formation of early phenacite–fluorspar association occurred in high-fluorite СО2-containing solutions of elevated alkalinity with a salinity of ~10.5%–12% wt eq. NaCl in a temperature range of ~ 370–260 °С at pressures ranging from 1873 to 1248 bar. More recent fluorite and bertrandite deposits were formed by solutions with a salinity of 6.4%–7.7% wt eq. NaCl in a temperature range of ~156 °C–110 °C and a pressure range of 639–427 bar. The examination of the isotopic signature of the ore association minerals confirmed the apocarbonate nature of the main ore deposit and allowed the determination of the magmatogene nature of the ore-forming paleothermal springs, which are the source of subalkaline leucogranites. The primary factors that influenced the formation of the F-Be ore included the reduction of the F activity in solutions because of the binding of Ca and F in fluorite as well as because of the decrease in temperature during the ore deposition process. The elevated alkalinity of the ore-formation solutions resulted in the low solubility of the Be complexes, which caused a relatively low Be content in the ore and a relatively small amount of mineralization in the deposit.

THE COMPRESSIBILITY OF GASES AT HIGH TEMPERATURES: X. XENON IN THE TEMPERATURE RANGE 0° TO 700 °C. AND THE PRESSURE RANGE 8 TO 50 ATMOSPHERES

1955 ◽  
Vol 33 (4) ◽  
pp. 633-636 ◽  
Author(s):  
E. Whalley ◽  
Y. Lupien ◽  
W. G. Schneider
Keyword(s):  
High Temperatures ◽  
Pressure Range ◽  
Virial Coefficients ◽  
Temperature Range ◽  
Temperature And Pressure

The virial coefficients of xenon have been measured in the temperature and pressure range described. The results are compared with previous measurements.

Refractivity of gases and its use in calculating virial coefficients

1958 ◽  
Vol 245 (1242) ◽  
pp. 373-381 ◽  
Keyword(s):  
Refractive Index ◽  
Pressure Range ◽  
Virial Coefficients ◽  
Precision Measurements ◽  
Temperature Range

Precision measurements of the refractive index of ethylene and neo pentane over a pressure range 0 to 1 atm and a temperature range of 25 to 70 °C were made and used to calculate virial coefficients. Some measurements on air and n -hexane are also reported. Certain aspects of the use of the Rayleigh refractometer are discussed.

ON A PLATINUM–RHODIUM – OXYGEN ELECTRODE IN SILICATE MELTS

1965 ◽  
Vol 43 (10) ◽  
pp. 2879-2887 ◽  
Author(s):  
R. E. Ranford ◽  
S. N. Flengas
Keyword(s):  
Oxygen Pressure ◽  
Pressure Range ◽  
Oxygen Electrode ◽  
Silicate Melts ◽  
Cell Potential ◽  
Temperature Range ◽  
Oxide Concentration ◽  
Nickelous Oxide

The potential of the formation cell[Formula: see text]was studied in the temperature range 900 °C to 1 100 °C. The platinum–rhodium – oxygen electrode was found to behave reversibly in the pressure range 5 × 10−3 atm to 1 atm oxygen. The effects on the cell potential of oxygen pressure, nickelous oxide concentration, and temperature, were all found to follow an exact Nernst relationship.

Temperature dependence of saturated vapour pressures of methyl isobutyl ketone, diisobutyl ketone, 1,1-difluorotetrachloroethane, and 1,2-difluorotetrachloroethane

1989 ◽  
Vol 54 (11) ◽  
pp. 2868-2871 ◽  
Author(s):  
Václav Svoboda ◽  
Zdena Adamcová ◽  
Vladimír Kubeš
Keyword(s):  
Temperature Dependence ◽  
Pressure Range ◽  
Methyl Isobutyl Ketone ◽  
Static Method ◽  
Methyl Isobutyl ◽  
Isobutyl Ketone ◽  
Temperature Range ◽  
Saturated Vapour

Temperature dependence of saturated vapour pressures of methyl isobutyl ketone, diisobutyl ketone, 1,1-difluorotetrachloroethane, and 1,2-diflurotetrachloethane was measured. A static method was used, and the measurements were carried out in the temperature range of 261 to 353 K and in the pressure range of 0.5-49 kPa.

A resonant high-pressure sensor based on dual cavities

2021 ◽  
Vol 31 (12) ◽  
pp. 124002
Author(s):  
Jie Yu ◽  
Yulan Lu ◽  
Deyong Chen ◽  
Junbo Wang ◽  
Jian Chen ◽  
...  
Keyword(s):  
High Pressure ◽  
Temperature Sensitivity ◽  
Pressure Sensor ◽  
Pressure Range ◽  
High Vacuum ◽  
Pressure Sensors ◽  
Anodic Bonding ◽  
Temperature Range ◽  
Pressure Sensitive ◽  
Ocean Sciences

Abstract High-pressure sensors enable expansive demands in ocean sciences, industrial controls, and oil explorations. Successful sensor realized in piezoresistive high-pressure sensors which suffer from the key issue of compromised accuracies due to serious temperature drifts. Herein, this paper presents a high accuracy resonant high-pressure sensor with the pressure range of 70 MPa. Different from conventional resonant high-pressure sensor, the developed sensor utilized a dual-resonator-cavity design to minimize temperature disturbances and improve the pressure sensitivities. Besides, four circle cavities were used to maintain a high vacuum level for resonators after anodic bonding process. In details, Dual resonators, which is parallelly placed in the tensile and compressive stresses areas of a rectangular pressure sensitive diaphragm, are separated vacuum-packaged in the parallel dual cavities. Thus, pressure under measurement bends the pressure sensitive diaphragm, producing an increased pressure sensitivity and a decreased temperature sensitivity by the differential outputs of the dual resonators. Parameterized mathematical models of the sensor were established and the parameters of the models were optimized to adjust the pressure sensitivities and the temperature sensitivities of the sensor. Simplified deep reactive ion etching was used to form the sensing structure of the sensor and only once anodic bonding was used to form vacuum packaging for the dual resonators. Experimental results confirmed that the Q values of the resonators were higher than 32 000. Besides, the temperature sensitivity of the sensor was reduced from 44 Hz °C−1 (494 ppm °C−1) to 1 Hz °C−1 (11 ppm °C−1) by the differential outputs of the dual resonators in the temperature range of −10 °C–60 °C under the pressure of 1000 kPa. In addition, the accuracy of the sensor was better than 0.02% FS within the pressure range of 110–6500 kPa and the temperature range of −10 °C–60 °C by using a polynomial algorithm.

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