scholarly journals Thermal equation of state of cubic boron nitride: Implications for a high-temperature pressure scale

2007 ◽  
Vol 75 (22) ◽  
Author(s):  
Alexander F. Goncharov ◽  
Jonathan C. Crowhurst ◽  
John K. Dewhurst ◽  
Sangeeta Sharma ◽  
Chrystele Sanloup ◽  
...  
Keyword(s):  
High Temperature ◽  
Equation Of State ◽  
Boron Nitride ◽  
Cubic Boron Nitride ◽  
Thermal Equation ◽  
Thermal Equation Of State ◽  
Pressure Scale

Diamond and cubic boron nitride under high pressure: Raman scattering, equation of state and high pressure scale

1989 ◽  
Vol 1 (5-6) ◽  
pp. 333-336 ◽  
Author(s):  
I. V. Aleksandrov ◽  
A. P. Goncharov ◽  
I. N. Makarenko ◽  
A. N. Zisman ◽  
E. V. Jakovenko ◽  
...  
Keyword(s):  
High Pressure ◽  
Equation Of State ◽  
Boron Nitride ◽  
Raman Scattering ◽  
Cubic Boron Nitride ◽  
Pressure Scale

scholarly journals High-Pressure High-Temperature Stability and Thermal Equation of State of Zircon-Type Erbium Vanadate

2018 ◽  
Vol 57 (21) ◽  
pp. 14005-14012 ◽  
Author(s):  
Javier Ruiz-Fuertes ◽  
Domingo Martínez-García ◽  
Tomás Marqueño ◽  
Daniel Errandonea ◽  
Simon G. MacLeod ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Equation Of State ◽  
Temperature Stability ◽  
High Temperature Stability ◽  
Thermal Equation ◽  
Thermal Equation Of State ◽  
High Pressure High Temperature ◽  
Zircon Type

Cubic boron nitride as a primary calibrant for a high temperature pressure scale

2007 ◽  
Vol 27 (4) ◽  
pp. 409-417 ◽  
Author(s):  
Alexander F. Goncharov ◽  
Stanislav Sinogeikin ◽  
Jonathan C. Crowhurst ◽  
Muhtar Ahart ◽  
Dmitry Lakshtanov ◽  
...  
Keyword(s):  
High Temperature ◽  
Boron Nitride ◽  
Cubic Boron Nitride ◽  
Pressure Scale

scholarly journals Thermal Equation of State of Fe3C to 327 GPa and Carbon in the Core

Minerals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 744 ◽  
Author(s):  
Suguru Takahashi ◽  
Eiji Ohtani ◽  
Daijo Ikuta ◽  
Seiji Kamada ◽  
Tatsuya Sakamaki ◽  
...  
Keyword(s):  
High Temperature ◽  
Equation Of State ◽  
Inner Core ◽  
Velocity Structure ◽  
Light Element ◽  
Scale Model ◽  
Earth Model ◽  
Thermal Equation ◽  
The Core ◽  
Pressure Scale

The density and sound velocity structure of the Earth’s interior is modeled on seismological observations and is known as the preliminary reference Earth model (PREM). The density of the core is lower than that of pure Fe, which suggests that the Earth’s core contains light elements. Carbon is one plausible light element that may exist in the core. We determined the equation of state (EOS) of Fe3C based on in situ high-pressure and high-temperature X-ray diffraction experiments using a diamond anvil cell. We obtained the P–V data of Fe3C up to 327 GPa at 300 K and 70–180 GPa up to around 2300 K. The EOS of nonmagnetic (NM) Fe3C was expressed by two models using two different pressure scales and the third-order Birch–Murnaghan EOS at 300 K with the Mie–Grüneisen–Debye EOS under high-temperature conditions. The EOS can be expressed with parameters of V0 = 148.8(±1.0) Å3, K0 = 311.1(±17.1) GPa, K0′ = 3.40(±0.1), γ0 = 1.06(±0.42), and q = 1.92(±1.73), with a fixed value of θ0 = 314 K using the KBr pressure scale (Model 1), and V0 = 147.3(±1.0) Å3, K0 = 323.0(±16.6) GPa, K0′ = 3.43(±0.09), γ0 = 1.37(±0.33), and q = 0.98(±1.01), with a fixed value of θ0 = 314 K using the MgO pressure scale (Model 2). The density of Fe3C under inner core conditions (assuming P = 329 GPa and T = 5000 K) calculated from the EOS is compatible with the PREM inner core.

scholarly journals Simultaneous high-pressure and high-temperature volume measurements of ice VII and its thermal equation of state

2010 ◽  
Vol 82 (13) ◽  
Author(s):  
Emiko Sugimura ◽  
Tetsuya Komabayashi ◽  
Kei Hirose ◽  
Nagayoshi Sata ◽  
Yasuo Ohishi ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Equation Of State ◽  
Thermal Equation ◽  
Thermal Equation Of State ◽  
Volume Measurements

Cubic Boron Nitride as a New Semiconductor for Optoelectronics: Luminescence Properties and Potentialities

1989 ◽  
Vol 162 ◽  
Author(s):  
Koh Era ◽  
Osamu Mishima
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Boron Nitride ◽  
Room Temperature ◽  
Cubic Boron Nitride ◽  
Visible Region ◽  
Vibrational Structure ◽  
Luminescence Properties ◽  
Optoelectronic Applications ◽  
P Type

ABSTRACTIn cubic boron nitride made by high pressure and high temperature technique in our institute, we have found three luminescence bands in the ultraviolet and the short visible region at room temperature by cathode-ray excitation. They are: a band having vibrational structure and ascribable to undoped state of the crystal, a band ascribable to p-type doping and a band ascribable to n-type doping. Discussion is made on differences between the injection luminescence and the cathodoluminescence. Potentialities and difficulties in realizing the potentialities of cBN for optoelectronic applications are discussed.

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