Femtosecond X-ray Diffraction Measurement of a Solid-Solid Phase Transition in VO2

2002 ◽  
Author(s):  
A. Cavalleri ◽  
Cs. Tóth ◽  
C.W. Siders ◽  
J.A. Squier ◽  
F. Ráksi ◽  
...  
Keyword(s):  
Phase Transition ◽  
Solid Phase ◽  
Diffraction Measurement ◽  
X Ray Diffraction ◽  
X Ray ◽  
Solid Phase Transition

scholarly journals X-ray tracking of structural changes during a subnanosecond solid-solid phase transition in cobalt nanoparticles

2019 ◽  
Vol 100 (24) ◽  
Author(s):  
Peter Vester ◽  
Morten Christensen ◽  
Elisa Biasin ◽  
Simon O. Mariager ◽  
Gemma Newby ◽  
...  
Keyword(s):  
Phase Transition ◽  
Structural Changes ◽  
Solid Phase ◽  
Cobalt Nanoparticles ◽  
X Ray ◽  
Solid Phase Transition

scholarly journals Soft x-ray induced femtosecond solid-to-solid phase transition

2017 ◽  
Vol 24 ◽  
pp. 22-27 ◽  
Author(s):  
Franz Tavella ◽  
Hauke Höppner ◽  
Victor Tkachenko ◽  
Nikita Medvedev ◽  
Flavio Capotondi ◽  
...  
Keyword(s):  
Phase Transition ◽  
Solid Phase ◽  
X Ray ◽  
Solid Phase Transition

Solid-Solid Phase Transition in Trimethylolpropane (TRMP)

2002 ◽  
Vol 216 (12) ◽  
Author(s):  
D. Chandra ◽  
H. Mandalia ◽  
W.-M. Chien ◽  
D. W. Lindle ◽  
R. Rudman
Keyword(s):  
Room Temperature ◽  
Solid Phase ◽  
X Ray Diffraction ◽  
Storage Material ◽  
X Ray ◽  
Α Phase ◽  
Energy Storage Material ◽  
Plastic Phase ◽  
Solid Phase Transition ◽  
Thermal Energy Storage Material

An orientationally disordered crystalline (ODIC) plastic phase (γ) was observed in Trimethylolpropane (TRMP) during heating by high resolution thermal and X-ray diffraction analyses. TRMP is a potential thermal energy storage material. The enthalpies of solid-solid (α → γ at 327.8 K) and fusion (γ → liquid at 332.7 K) transitions are 16.36 kJ/mol and 0.9 kJ/mol, respectively. Supercooling was observed during solidification of melts, and this supercooled γ phase began to transform to a metastable crystalline phase, designated as α′, after 20 minutes at room temperature. The lattice parameters of the monoclinic α phase, obtained from this study, are:

Cryogenic mechanical milling of high density polyethylene

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Ana Paula Cysne Barbosa ◽  
Michael Stranz ◽  
Frank Katzenberg ◽  
Uwe Köster
Keyword(s):  
Mechanical Milling ◽  
Solid Phase ◽  
Polarized Light ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Monoclinic Modification ◽  
X Ray ◽  
Responsible Mechanism ◽  
Solid Phase Transition ◽  
Melting And Crystallization

AbstractHDPE was analyzed after being submitted to cryogenic mechanical milling (CMM) by X-ray diffraction (WAXS), polarized light microscopy and differential scanning calorimetry (DSC). After CMM, besides the known phase transformation of the orthorhombic PE crystals into the monoclinic modification, slight changes in the melting and crystallization behavior as well as an unexpected increase in crystallinity were observed. The observed results can be explained by assuming a solid/solid phase transition as the responsible mechanism.

A multinuclear solid-state magnetic resonance study of silver nitrate triphenylphosphine

2005 ◽  
Vol 83 (10) ◽  
pp. 1721-1730 ◽  
Author(s):  
Se-Woung Oh ◽  
Guy M Bernard ◽  
Roderick E Wasylishen ◽  
Robert McDonald ◽  
Michael J Ferguson
Keyword(s):  
Phase Transition ◽  
Solid State ◽  
Single Crystal ◽  
Silver Nitrate ◽  
Solid Phase ◽  
Variable Temperature ◽  
Spin Coupling ◽  
X Ray Diffraction ◽  
X Ray ◽  
H Nmr

Variable-temperature solid-state 31P, 15N, and 2H NMR spectroscopy, X-ray diffraction, and differential scanning calorimetry studies of the 1:1 adduct of silver nitrate and triphenylphosphine (AgNO3·PPh3) reveal a solid–solid phase transition at 300 K. The principal components of the phosphorus and nitrogen chemical shift tensors for both phases are determined from NMR spectra of MAS and stationary samples. In addition, the indirect spin-spin coupling between phosphorus and the naturally occurring isotopes of silver (107Ag and 109Ag) are resolved. Experimental 2H NMR line shapes for silver nitrate perdeuterated triphenylphosphine are those characteristic of rigid phenyl groups at temperatures above and below the phase-transition temperature. Powder and single-crystal X-ray diffraction data for AgNO3·PPh3 obtained at 193, 295, and 313 K are reported; data obtained at 193 and 295 K are almost identical, but are significantly different from those obtained at 313 K and from an earlier single-crystal X-ray diffraction investigation performed at 298 K. All X-ray studies found that AgNO3·PPh3 crystallizes in the monoclinic form, space group P21/c.Key words: 1:1 silver nitrate triphenylphosphine adduct, solid-state NMR, X-ray diffraction, phase transition.

Study of Kinetics of Solid Phase Transition in Tetracosane С24Н50 by High-Resolution Synchrotron X-Ray Powder Diffraction

2019 ◽  
Vol 61 (6) ◽  
pp. 1128-1135
Author(s):  
V. A. Marikhin ◽  
P. V. Dorovatovskii ◽  
Ya. V. Zubavichus ◽  
M. V. Baidakova ◽  
E. M. Ivan’kova ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Resolution ◽  
Powder Diffraction ◽  
Solid Phase ◽  
X Ray ◽  
Solid Phase Transition ◽  
Kinetics Of
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