Nanocrystal formation in homogeneous and heterogeneous amorphous phase

2021 ◽  
Author(s):  
Galina E. Abrosimova ◽  
Dmitrii V. Matveev ◽  
Aleksandr S. Aronin
Keyword(s):  
Amorphous Phase ◽  
Nanocrystal Formation

Nanocrystal formation in homogeneous and heterogeneous amorphous phase

2021 ◽  
Author(s):  
Galina E. Abrosimova ◽  
Dmitrii V. Matveev ◽  
Aleksandr S. Aronin
Keyword(s):  
Amorphous Phase ◽  
Nanocrystal Formation

Structure of Amorphous Phase and Nanocrystalline Phases in the Devitrification of Iron Alloys

2019 ◽  
Vol 49 (5) ◽  
pp. 361-364
Author(s):  
N. B. D’yakonova ◽  
D. L. D’yakonov ◽  
B. A. Kornienkov ◽  
V. P. Filippova
Keyword(s):  
Amorphous Phase ◽  
Iron Alloys ◽  
Nanocrystalline Phases

The Application of X-Ray Diffraction at Elevated Temperatures to Study the Mechanism of Formation of Sodium Tripolyphosphate

1961 ◽  
Vol 5 ◽  
pp. 276-284
Author(s):  
E. L. Moore ◽  
J. S. Metcalf
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Amorphous Phase ◽  
Elevated Temperatures ◽  
Sodium Tripolyphosphate ◽  
X Ray Diffraction ◽  
Mechanism Of Formation ◽  
X Ray ◽  
Temperature Form ◽  
High Temperature Form

AbstractHigh-temperature X-ray diffraction techniques were employed to study the condensation reactions which occur when sodium orthophosphates are heated to 380°C. Crystalline Na4P2O7 and an amorphous phase were formed first from an equimolar mixture of Na2HPO4·NaH2PO4 and Na2HPO4 at temperatures above 150°C. Further heating resulted in the formation of Na5P3O10-I (high-temperature form) at the expense of the crystalline Na4P4O7 and amorphous phase. Crystalline Na5P3O10-II (low-temperature form) appears after Na5P3O10-I.Conditions which affect the yield of crystalline Na4P2O7 and amorphous phase as intermediates and their effect on the yield of Na5P3O10 are also presented.

scholarly journals Polymer Composites with 0.98 Transparencies and Small Optical Energy Band Gap Using a Promising Green Methodology: Structural and Optical Properties

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1648
Author(s):  
Muaffaq M. Nofal ◽  
Shujahadeen B. Aziz ◽  
Jihad M. Hadi ◽  
Wrya O. Karim ◽  
Elham M. A. Dannoun ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Polymer Composites ◽  
Amorphous Phase ◽  
Absorption Edge ◽  
Complex Form ◽  
Bandgap Energy ◽  
Optical Parameters ◽  
Visible Spectroscopy ◽  
Uv Visible

In this work, a green approach was implemented to prepare polymer composites using polyvinyl alcohol polymer and the extract of black tea leaves (polyphenols) in a complex form with Co2+ ions. A range of techniques was used to characterize the Co2+ complex and polymer composite, such as Ultraviolet–visible (UV-Visible) spectroscopy, Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The optical parameters of absorption edge, refractive index (n), dielectric properties including real and imaginary parts (εr, and εi) were also investigated. The FRIR and XRD spectra were used to examine the compatibility between the PVA polymer and Co2+-polyphenol complex. The extent of interaction was evidenced from the shifts and change in the intensity of the peaks. The relatively wide amorphous phase in PVA polymer increased upon insertion of the Co2+-polyphenol complex. The amorphous character of the Co2+ complex was emphasized with the appearance of a hump in the XRD pattern. From UV-Visible spectroscopy, the optical properties, such as absorption edge, refractive index (n), (εr), (εi), and bandgap energy (Eg) of parent PVA and composite films were specified. The Eg of PVA was lowered from 5.8 to 1.82 eV upon addition of 45 mL of Co2+-polyphenol complex. The N/m* was calculated from the optical dielectric function. Ultimately, various types of electronic transitions within the polymer composites were specified using Tauc’s method. The direct bandgap (DBG) treatment of polymer composites with a developed amorphous phase is fundamental for commercialization in optoelectronic devices.

Iterative Cup Overlapping: An Efficient Identification Algorithm for Cage Structures of Amorphous Phase Hydrates

2021 ◽  
Vol 125 (4) ◽  
pp. 1282-1292
Author(s):  
Yongchao Hao ◽  
Zhe Xu ◽  
Shuai Du ◽  
Xuefeng Yang ◽  
Tingji Ding ◽  
...  
Keyword(s):  
Amorphous Phase ◽  
Identification Algorithm

Annealing behaviour of amorphous ?- phase alloys of FeW and MoCo

1980 ◽  
Vol 15 (10) ◽  
pp. 2605-2611 ◽  
Author(s):  
J. L. Brimhall ◽  
R. Wang ◽  
H. E. Kissinger
Keyword(s):  
Amorphous Phase ◽  
Annealing Behaviour
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