Results 251 to 260 of about 2,860,718 (307)

NANOMATERIALS UNDER HIGH TEMPERATURE AND HIGH PRESSURE

Modern Physics Letters B, 2010
Two different approaches to study thermal expansion and compression of nanosystems are unified, which have been treated quite independently by earlier workers. We provide the simple theoretical analysis, which demonstrates that these two approaches may be unified into a single theory, viz. one can be derived from other.
Kumar, R., Sharma, Uma D., Kumar, Munish
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Predicting Temperature and Pressure in High-Temperature–High-Pressure Gas Wells

Petroleum Science and Technology, 2011
Abstract In this article, we give a coupled system model of differential equations concerning pressure and temperature in high-temperature–high-pressure wells according to mass, momentum, and energy balances. We present an algorithm solution model, along with the fourth-order Runge-Kutta method.
Z. Wu, J. Xu, X. Wang, K. Chen, X. Li, X. Zhao   +5 more
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Cadmium under High Pressure and High Temperature Conditions

Physica Scripta, 2005
In this work liquid and solid cadmium has been investigated in a wide pressure and temperature range in order to provide new information about structure and transitions occurring in this metal. X-ray absorption, single-energy temperature scans and energy scanning X-ray diffraction data were collected in a 25O600 C temperature and 0O5.8 GPa pressure ...
Minicucci M, Trapananti A, Di Cicco A, De Panfilis S, Aquilanti G   +4 more
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Diamond Pressure and Temperature Sensors for High-Pressure High-Temperature Applications

physica status solidi (a), 2001
A high-pressure high-temperature diamond based sensor has been developed for the use in diamond anvil cells. The electronic structure of the sensor is that of p-i-p unipolar diode with boron doped p-type regions separated by an i-region containing compensated boron acceptors.
A.M. Zaitsev, M. Burchard, J. Meijer, A. Stephan, B. Burchard, W.R. Fahrner, W. Maresch   +6 more
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Temperature and pressure control system for high temperature and high pressure fluid-solid action

2011 International Conference on Computer Science and Service System (CSSS), 2011
A control system for the high temperature and high pressure fluid-solid action furnace based on the self-revise PID was introduced. The hardware system was composed by an industrial computer, a servo and PLC. The control system is already applied and experiments show that it can achieve the technical requirement in both stability and precision.
null Dongsheng Chen, null Junxia Gao, null Mei Li   +2 more
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High pressure and high temperature fluid fugacities

Geochimica et Cosmochimica Acta, 1987
Abstract High-temperature and high-pressure shock-wave data on fluids (pure species) have been combined with low-temperature and low-pressure data to generate a “corresponding state” equation in the virial format in reduced pressure and temperature for many species. The equation is then modified to obtain a similar equation of state for H2O.
S.K. Saxena, Y. Fei
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High-Pressure and High-Temperature Powder Diffraction

Reviews in Mineralogy and Geochemistry, 2000
As the degree of difficulty in synthesizing single crystals at high pressure and temperature increases, powder X-ray diffraction becomes a primary technique for determination of crystal structure, unit cell parameters as a function of pressure and temperature, and phase transformations.
Y. Fei, Y. Wang
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Solid C70 high pressure and high temperature

Journal of Physics and Chemistry of Solids, 1993
Abstract The phase transition from a simple rhombohedral to an fcc phase of C 70 was examined under high temperature and high pressure. The phase boundary has a steep positive slope in the pressure temperature phase diagram. X-ray diffraction lines from solid C 70 disappeared at 1170 K and 0.9 GPa. This was assumed to be due to the decomposition of
H. Kawamura, Y. Akahama, M. Kobayashi, H. Shinohara, H. Sato, Y. Saito, T. Kikegawa, O. Shimomura, K. Aoki   +8 more
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Pressure−Volume−Temperature Properties of Methyl Chloride at High Pressures and Temperatures

Journal of Chemical & Engineering Data, 2006
PVT data of methyl chloride were measured up to 400 MPa at eight isotherms ranging from (298.15 to 573.15) K. Experiments were performed with a thin-walled sample holder under equal pressure, both inside and outside. The volume change of the sample was determined with a separation system at 298.15 K by making use of a magnetic float on mercury and a ...
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High-pressure and high-temperature studies on oxide garnets

Physical Review B, 1996
We report high-pressure and high-temperature studies on a series of oxide garnets of chemical composition ${A}_{3}{B}_{2}{C}_{3}{\mathrm{O}}_{12}$. The members of this family investigated are gadolinium scandium gallium garnet (GSGG), gadolinium gallium garnet (GGG), and yttrium aluminum garnet (YAG).
, Hua, , Mirov, , Vohra
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