Study of electrical conductivity response upon formation of ice and gas hydrates from salt solutions by a second generation high pressure electrical conductivity probe

2014 ◽  
Vol 85 (11) ◽  
pp. 115101 ◽  
Author(s):  
Barbara Sowa ◽  
Xue Hua Zhang ◽  
Karen A. Kozielski ◽  
Dave E. Dunstan ◽  
Patrick G. Hartley ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
High Pressure ◽  
Gas Hydrates ◽  
Second Generation ◽  
Salt Solutions ◽  
Conductivity Probe

scholarly journals Pressure-Induced Structural Phase Transition and Metallization in Ga2Se3 up to 40.2 GPa under Non-Hydrostatic and Hydrostatic Environments

Crystals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 746
Author(s):  
Meiling Hong ◽  
Lidong Dai ◽  
Haiying Hu ◽  
Xinyu Zhang
Keyword(s):  
Phase Transition ◽  
Electrical Conductivity ◽  
High Pressure ◽  
Phase Transformation ◽  
Transport Properties ◽  
Electrical Transport ◽  
Structural Phase ◽  
Structure Evolution ◽  
Systematic Research ◽  
Electrical Transport Properties

A series of investigations on the structural, vibrational, and electrical transport characterizations for Ga2Se3 were conducted up to 40.2 GPa under different hydrostatic environments by virtue of Raman scattering, electrical conductivity, high-resolution transmission electron microscopy, and atomic force microscopy. Upon compression, Ga2Se3 underwent a phase transformation from the zinc-blende to NaCl-type structure at 10.6 GPa under non-hydrostatic conditions, which was manifested by the disappearance of an A mode and the noticeable discontinuities in the pressure-dependent Raman full width at half maximum (FWHMs) and electrical conductivity. Further increasing the pressure to 18.8 GPa, the semiconductor-to-metal phase transition occurred in Ga2Se3, which was evidenced by the high-pressure variable-temperature electrical conductivity measurements. However, the higher structural transition pressure point of 13.2 GPa was detected for Ga2Se3 under hydrostatic conditions, which was possibly related to the protective influence of the pressure medium. Upon decompression, the phase transformation and metallization were found to be reversible but existed in the large pressure hysteresis effect under different hydrostatic environments. Systematic research on the high-pressure structural and electrical transport properties for Ga2Se3 would be helpful to further explore the crystal structure evolution and electrical transport properties for other A2B3-type compounds.

Formation of Ice, Tetrahydrofuran Hydrate, and Methane/Propane Mixed Gas Hydrates in Strong Monovalent Salt Solutions

2014 ◽  
Vol 28 (11) ◽  
pp. 6877-6888 ◽  
Author(s):  
Barbara Sowa ◽  
Xue Hua Zhang ◽  
Patrick G. Hartley ◽  
Dave E. Dunstan ◽  
Karen A. Kozielski ◽  
...  
Keyword(s):  
Gas Hydrates ◽  
Salt Solutions ◽  
Mixed Gas ◽  
Monovalent Salt

Experimental Study on the Electrical Conductivity of Pyroxene Andesite at High Temperature and High Pressure

2016 ◽  
Vol 174 (3) ◽  
pp. 1033-1041 ◽  
Author(s):  
KeShi Hui ◽  
LiDong Dai ◽  
HePing Li ◽  
HaiYing Hu ◽  
JianJun Jiang ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Experimental Study ◽  
High Pressure ◽  
High Temperature ◽  
Pyroxene Andesite

Electrical conductivity and superconductivity of metal phosphides with skutterudite-type structure prepared at high pressure

1996 ◽  
Vol 57 (2) ◽  
pp. 211-216 ◽  
Author(s):  
Ichimin Shirotani ◽  
Takafumi Adachi ◽  
Kenji Tachi ◽  
Sakae Todo ◽  
Kiyokazu Nozawa ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
High Pressure ◽  
Type Structure ◽  
Metal Phosphides

Electrical Conductivity and Phase Transitions in Ferroelectric Solid Solutions Li0.17Na0.83ТауNb1-уO3 (y = 0 – 0.5) in High Pressure

2020 ◽  
Vol 310 ◽  
pp. 6-13
Author(s):  
Vadim V. Efremov ◽  
Mikhail N. Palatnikov ◽  
Yuriy V. Radyush ◽  
Olga B. Shcherbina
Keyword(s):  
Solid Solution ◽  
Electrical Conductivity ◽  
High Pressure ◽  
Phase Transitions ◽  
Solid Solutions ◽  
Synthesis Method ◽  
Ferroelectric Ceramic ◽  
Synthesis Temperature ◽  
Structure Phase ◽  
Ceramic Solid Solution

Ferroelectric ceramic solid solutions LixNa1-xTayNb1-yO3 (х = 0.17; у = 0 – 0.5) with the perovskite structure have been obtained by the thermobaric synthesis method. Particularities of their microstructure, elastic properties, electrical conductivity and permittivity have been researched. It has been established that an increase in the thermobaric synthesis temperature leads to a decrease in the Young’s modulus value. Specific static conductivity values have been determined; charge carrier activation enthalpies На have been calculated. The Curie temperature of the samples has been determined to decrease with an increase in tantalum content. A Ferroelectric ceramic solid solution Li0.17Na0.83Ta0.1Nb0.9O3 was shown to undergo four structure phase transitions in the temperature range 300-820 К. A Li0.17Na0.83Ta0.1Nb0.9O3 has been shown to be a high temperature superionic. Possible mechanisms of the detected phenomena are discussed.

Mechanical properties and electrical conductivity of ultrafine-grained aluminum consolidated by high-pressure sliding

Materialia ◽  
2020 ◽  
Vol 14 ◽  
pp. 100916 ◽  
Author(s):  
Yongpeng Tang ◽  
Takuya Komatsu ◽  
Takahiro Masuda ◽  
Makoto Arita ◽  
Yoichi Takizawa ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
High Pressure ◽  
Ultrafine Grained
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