Results 241 to 250 of about 1,120,137 (290)

High Pressure, High Temperature Viscometer

Review of Scientific Instruments, 1967
An apparatus for measuring the relative viscosity of molten glass-forming oxides at elevated temperatures and pressures is described. It utilizes a concentric cylinder viscometer and electric furnace enclosed in a steel pressure bomb and is gas pressured.
L. L. Sperry, J. D. Mackenzie
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High-Temperature-High- Pressure Diffractometry

Reviews in Mineralogy and Geochemistry, 2000
Effective techniques for conducting high-pressure and high-temperature single-crystal X-ray diffraction experiments were developed in the 1970s. By the end of that decade a number of papers had been published that defined optimal methods for operating diffractometers, especially for high-pressure experiments.
R. J. Angel, R. T. Downs, L. W. Finger
openaire   +1 more source

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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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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306 High Pressure, High Temperature

2012
The greatest challenge in phase theoretical classical thermodynamics is the computational prediction of phase behaviour and thermophysical material properties for conditions that prevail in the interior of the earth. Conditions that are far away from the pressure and temperature values at the surface of the earth, and for that reason rather ...
M. H. G. Jacobs, H. A. J. Oonk
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Rheology at High Pressures and High Temperatures

2010
We review recent progress in studying deformation at simultaneous high pressure and high temperature using in-situ diffraction and imaging in the large volume press (LVP). Current state-of-the-art deformation devices and diffraction and imaging techniques are introduced, along with theoretical background for stress measurements based on diffraction ...
Yanbin Wang, Nadege Hilairet
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High-Pressure/High-Temperature Cementing

Journal of Petroleum Technology, 2002
This article, written by Assistant Technology Editor Karen Bybee, contains highlights of paper SPE 72481, "Optimizing HTHP Cementing Operations," by John Shaughnessy, SPE, BP plc, and John Helweg, Schlumberger, originally presented at the 2002 IADC/SPE Drilling Conference, Dallas, 26-28 February.
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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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An Absolute Noise Thermometer for High Temperatures and High Pressures

Review of Scientific Instruments, 1949
A null device for determining the ratio of two absolute temperatures with an accuracy of 0.1 percent is described. This device balances the mean-square fluctuations in voltage across the terminals of two resistors arising from thermal agitation at the temperatures to be compared.
J B, GARRISON, A W, LAWSON
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Melting and dissociation of ammonia at high pressure and high temperature

The Journal of Chemical Physics, 2012
Raman spectroscopy and synchrotron x-ray diffraction measurements of ammonia (NH3) in laser-heated diamond anvil cells, at pressures up to 60 GPa and temperatures up to 2500 K, reveal that the melting line exhibits a maximum near 37 GPa and intermolecular proton fluctuations substantially increase in the fluid with pressure.
J G O, Ojwang, R Stewart, McWilliams, Xuezhi, Ke, Alexander F, Goncharov   +3 more
openaire   +2 more sources