Local structure change of Rh on alumina after treatments in high-temperature oxidizing and reducing environments

2005 ◽  
Vol 37 (2) ◽  
pp. 115-119 ◽  
Author(s):  
K. Dohmae ◽  
T. Nonaka ◽  
Y. Seno
Keyword(s):  
High Temperature ◽  
Local Structure ◽  
Structure Change

Local Structure Change Around Ni Atoms in MgNi Alloys during Mechanical Alloying Process

2004 ◽  
Vol 20-21 ◽  
pp. 635-640 ◽  
Author(s):  
Masaki Sakurai ◽  
Toshio Nasu ◽  
Yuh Nomura ◽  
Takeshi Usuki ◽  
Eiichiro Matsubara
Keyword(s):  
Mechanical Alloying ◽  
Local Structure ◽  
Structure Change

scholarly journals Local-structure change rendered by electronic localization-delocalization transition in cerium-based metallic glasses

2018 ◽  
Vol 97 (6) ◽  
Author(s):  
Qiang Luo ◽  
Björn Schwarz ◽  
Janine C. Swarbrick ◽  
Jozef Bednarčik ◽  
Yingcai Zhu ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Local Structure ◽  
Structure Change ◽  
Electronic Localization

scholarly journals Hydrogen transport property of polymer-derived cobalt cation-doped amorphous silica

2021 ◽  
Vol 8 (1) ◽  
pp. 90-99 ◽  
Author(s):  
Shotaro Tada ◽  
Shiori Ando ◽  
Toru Asaka ◽  
Yusuke Daiko ◽  
Sawao Honda ◽  
...  
Keyword(s):  
High Temperature ◽  
Transport Property ◽  
Amorphous Silica ◽  
Local Structure ◽  
Hydrogen Transport ◽  
Cobalt Cation ◽  
Co Doped

The effect of the local structure of Co-doped amorphous silica on the hydrogen transport property was studied with the aim to improve the high-temperature hydrogen-permselectivity of microporous amorphous silica-based membranes.

The local structure of Ta(v) aqua ions in high temperature fluoride- and chloride-bearing solutions: Implications for Ta transport in granite-related postmagmatic fluids

2019 ◽  
Vol 57 (6) ◽  
pp. 843-851
Author(s):  
Alan J. Anderson ◽  
Robert A. Mayanovic ◽  
Thomas Lee
Keyword(s):  
High Temperature ◽  
Local Structure ◽  
Elevated Temperatures ◽  
National Laboratory ◽  
Argonne National Laboratory ◽  
Acidic Solutions ◽  
Diamond Anvil ◽  
X Ray Absorption ◽  
Photon Source

Abstract The local structure of Ta(V) in high-temperature fluoride- and chloride-bearing acidic solutions was investigated using in situ X-ray absorption spectroscopy (XAS). All XAS spectra were collected from two solutions, designated A and B, at beamline ID-20-C at the Advanced Photon Source, Argonne National Laboratory. Spectra were collected from solution A at 350 and 400 °C and from solution B at 25, 360, and 400 °C after the solutions were sealed in a hydrothermal diamond anvil cell. Solution A was prepared by dissolving Ta2O5 powder in 5% HF solution; solution B consisted of TaCl5 dissolved in 2% HF. The dominant tantalum species in solution A at elevated temperatures was TaF83–. In contrast, TaCl6–, which was the dominant complex in solution B at room temperature, disappeared as hydroxide complexes with an average ligand number between 5 and 7 became the dominant species at 350 and 400 °C. The XAS results confirm the previously recognized effect of fluoride activity on Ta speciation in hydrothermal fluids and suggest that both fluoride and hydroxide complexes play an important role in the transport of Ta in acidic fluoride-bearing solutions involved in the formation of mineralized mica-rich replacement units in granitic pegmatites.

scholarly journals XAFS Study of Local Structure Change in Perovskite Titanates

2005 ◽  
pp. 359 ◽  
Author(s):  
K. Sato ◽  
T. Miyanaga ◽  
S. Ikeda ◽  
D. Diop
Keyword(s):  
Local Structure ◽  
Structure Change

Does the local structure play a role in high temperature superconductivity?

1996 ◽  
Vol 19 (4) ◽  
pp. 313-325
Author(s):  
F. Bridges ◽  
C.H. Booth ◽  
G.G. Li ◽  
E.D. Bauer ◽  
J. Boyce ◽  
...  
Keyword(s):  
High Temperature ◽  
Local Structure ◽  
High Temperature Superconductivity

A local structure change of bulk Pd40Ni40P20 glass during full relaxation

2007 ◽  
Vol 353 (32-40) ◽  
pp. 3053-3056 ◽  
Author(s):  
O. Haruyama ◽  
K. Sugiyama ◽  
M. Sakurai ◽  
Y. Waseda
Keyword(s):  
Local Structure ◽  
Structure Change ◽  
Full Relaxation

scholarly journals Local structure change evidenced by temperature-dependent elastic measurements: Case study on Bi1/2Na1/2TiO3-based lead-free relaxor piezoceramics

2014 ◽  
Vol 115 (8) ◽  
pp. 084108 ◽  
Author(s):  
Robert Dittmer ◽  
Wook Jo ◽  
Kyle G. Webber ◽  
Jacob L. Jones ◽  
Jürgen Rödel
Keyword(s):  
Local Structure ◽  
Structure Change ◽  
Lead Free ◽  
Temperature Dependent

Anomalous Change of the Viscosity and the Structure of Sn Melt with Temperature

2010 ◽  
Vol 123-125 ◽  
pp. 931-934 ◽  
Author(s):  
Zhong Xi Yang ◽  
Hao Ran Geng ◽  
Ning Zhang
Keyword(s):  
High Temperature ◽  
Temperature Region ◽  
Cluster Size ◽  
Correlation Radius ◽  
Structure Change ◽  
Discontinuous Change ◽  
Viscosity Change ◽  
Anomalous Change ◽  
High Temperature Xrd ◽  
Anomalous Point

On the basis of measuring the viscosity of Sn melt and referring to analysis of high temperature XRD, the change of viscosity and structure for Sn melt with temperature were carried out. The results show that there is discontinuous change of viscosity for Sn melt with the temperature. The state of Sn melt are divided into high, middle and low-temperature region according to the change of viscosity, and there is an anomalous point of viscosity change between different temperature region. There is a correlation between the viscosity change of and the structure change of Sn melt. The coordination number and correlation radius, and the fluid cluster size of Sn melt decrease with the increase of temperature, so that the viscosity of Sn melt decrease. But there is an anomalous change in the vicinity 673 K and 1073 K, it results in discontinuous change in viscosity of Sn melt.

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