In situ X-ray observation of phase transformation in Fe2O3 at high pressures and high temperatures

2005 ◽  
Vol 66 (10) ◽  
pp. 1714-1720 ◽  
Author(s):  
Shigeaki Ono ◽  
Yasuo Ohishi
Keyword(s):  
Phase Transformation ◽  
High Temperatures ◽  
High Pressures ◽  
X Ray

In-situ synchrotron x-ray study of phase transitions in melamine under high pressures and high temperatures

2011 ◽  
Vol 20 (7) ◽  
pp. 1090-1092 ◽  
Author(s):  
Michael Pravica ◽  
Martin Galley ◽  
Changyong Park ◽  
Harrison Ruiz ◽  
Jennifer Wojno
Keyword(s):  
Phase Transitions ◽  
High Temperatures ◽  
High Pressures ◽  
X Ray

scholarly journals SPring-8, What can we do now? In situ X-ray Diffraction Experiments under High Pressures and High Temperatures at BL14Bl Beamline.

2000 ◽  
Vol 42 (1) ◽  
pp. 59-67 ◽  
Author(s):  
Wataru UTSUMI ◽  
Yoshinori KATAYAMA ◽  
Takeshi MIZUTANI ◽  
Osamu SHIMOMURA ◽  
Masaaki YAMAKATA ◽  
...  
Keyword(s):  
High Temperatures ◽  
High Pressures ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals In-situ observation of synthesizing process of MmxCo4Sb12 utilizing x-ray diffraction under high temperatures and high pressures

2014 ◽  
Vol 502 ◽  
pp. 012017 ◽  
Author(s):  
Chihiro Sekine ◽  
Hirotaka Kato ◽  
Masatoshi Kanazawa ◽  
Yukihiro Kawamura ◽  
Keiki Takeda ◽  
...  
Keyword(s):  
High Temperatures ◽  
High Pressures ◽  
In Situ Observation ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals In-situ characterization of highly reversible phase transformation by synchrotron X-ray Laue microdiffraction

2016 ◽  
Vol 108 (21) ◽  
pp. 211902 ◽  
Author(s):  
Xian Chen ◽  
Nobumichi Tamura ◽  
Alastair MacDowell ◽  
Richard D. James
Keyword(s):  
Phase Transformation ◽  
In Situ Characterization ◽  
X Ray ◽  
Reversible Phase ◽  
Laue Microdiffraction

scholarly journals X-ray imaging for studying behavior of liquids at high pressures and high temperatures using Paris-Edinburgh press

2015 ◽  
Vol 86 (7) ◽  
pp. 072207 ◽  
Author(s):  
Yoshio Kono ◽  
Curtis Kenney-Benson ◽  
Yuki Shibazaki ◽  
Changyong Park ◽  
Yanbin Wang ◽  
...  
Keyword(s):  
High Temperatures ◽  
High Pressures ◽  
X Ray ◽  
X Ray Imaging

Dehydration and decomposition of pyrophyllite at high pressures: electrical conductivity and X-ray diffraction studies to 5 GPa

1997 ◽  
Vol 34 (6) ◽  
pp. 875-882 ◽  
Author(s):  
Tara L. Hicks ◽  
Richard A. Secco
Keyword(s):  
Electrical Conductivity ◽  
South African ◽  
Pressure Dependence ◽  
High Pressures ◽  
Ionic Conduction ◽  
Temperature Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Temperature Dependence Of Conductivity

The dehydration and decomposition of South African pyrophyllite were studied in the pressure range 2.5–5.0 GPa and in the temperature (T) range 295–1473 K using both in situ electrical conductivity measurements and X-ray diffraction studies on the recovered samples. Activation energies for conduction (Qc) vary in the range 0.02–0.07 eV for T ≤ 500 K where the dominant conduction mode is electronic, and Qc is in the range 1.10–1.28 eV for T ≥ 500 K where ionic conduction dominates. Abrupt changes in the isobaric temperature dependence of conductivity mark the onset of dehydration and subsequent decomposition into kyanite plus quartz–coesite. At 2.5 GPa, South African pyrophyllite forms the dehydroxylate phase at 760 K with a pressure dependence of ~30 K/GPa and complete decomposition follows at 1080 K with a pressure dependence of ~41 K/GPa. The resulting pressure–temperature phase diagram is in very good agreement with many previous studies at 1 atm (101.325 kPa).

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