Self-Assembly Synthesis of Microencapsulated n-Eicosane Phase-Change Materials with Crystalline-Phase-Controllable Calcium Carbonate Shell

2014 ◽  
Vol 28 (5) ◽  
pp. 3519-3529 ◽  
Author(s):  
Shiyu Yu ◽  
Xiaodong Wang ◽  
Dezhen Wu
Keyword(s):  
Calcium Carbonate ◽  
Phase Change ◽  
Crystalline Phase ◽  
Self Assembly ◽  
Phase Change Materials ◽  
Carbonate Shell

Microencapsulation of phase change materials with binary cores and calcium carbonate shell for thermal energy storage

2016 ◽  
Vol 171 ◽  
pp. 113-119 ◽  
Author(s):  
Tingyu Wang ◽  
Shuangfeng Wang ◽  
Ruilian Luo ◽  
Chunyu Zhu ◽  
Tomohiro Akiyama ◽  
...  
Keyword(s):  
Energy Storage ◽  
Calcium Carbonate ◽  
Phase Change ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Phase Change Materials ◽  
Carbonate Shell

Self-assembly of 3D-graphite block infiltrated phase change materials with increased thermal conductivity

2019 ◽  
Vol 235 ◽  
pp. 359-368 ◽  
Author(s):  
Huibin Yin ◽  
Shiyuan Gao ◽  
Chengcheng Liao ◽  
Chaomei Li ◽  
Zhuodi Cai ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Phase Change ◽  
Self Assembly ◽  
Phase Change Materials ◽  
Graphite Block

Resonant bonding in crystalline phase-change materials

2008 ◽  
Vol 7 (8) ◽  
pp. 653-658 ◽  
Author(s):  
Kostiantyn Shportko ◽  
Stephan Kremers ◽  
Michael Woda ◽  
Dominic Lencer ◽  
John Robertson ◽  
...  
Keyword(s):  
Phase Change ◽  
Crystalline Phase ◽  
Phase Change Materials

Thermal and elastic properties of Ge-Sb-Te based phase-change materials

2011 ◽  
Vol 1338 ◽  
Author(s):  
P. Zalden ◽  
C. Bichara ◽  
J. v. Eijk ◽  
R. P. Hermann ◽  
I. Sergueev ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Phase Change ◽  
Data Storage ◽  
Crystalline Phase ◽  
Phase Change Materials ◽  
X Ray Diffraction ◽  
X Ray ◽  
Storage Devices ◽  
Atomic Displacements ◽  
Optical Modes

ABSTRACTPhase-change materials undergo a change in bonding mechanism upon crystallization, which leads to pronounced modifications of the optical properties and is accompanied by an increase in average bond lengths as seen by extended x-ray absorption fine structure (EXAFS), neutron and x-ray diffraction. The reversible transition between a crystalline and an amorphous phase and its related property contrast are already employed in non-volatile data storage devices, such as rewritable optical discs and electronic memories. The crystalline phase of the prototypical material GeSb2Te4 is characterized by resonant bonding and pronounced disorder, which help to understand their optical and electrical properties, respectively. A change in bonding, however, should also affect the thermal properties, which will be addressed in this study. Based on EXAFS data analyses it will be shown that the thermal and static atomic displacements are larger in the meta-stable crystalline state. This indicates that the bonds become softer in the crystalline phase. At the same time, the bulk modulus increases upon crystallization. These observations are confirmed by the measured densities of phonon states (DPS), which reveal a vibrational softening of the optical modes upon crystallization. This demonstrates that the change of bonding upon crystallization in phase-change materials also has a profound impact on the lattice dynamics and the resulting thermal properties.

In situ study of vacancy disordering in crystalline phase-change materials under electron beam irradiation

2020 ◽  
Vol 187 ◽  
pp. 103-111 ◽  
Author(s):  
Ting-Ting Jiang ◽  
Xu-Dong Wang ◽  
Jiang-Jing Wang ◽  
Yu-Xing Zhou ◽  
Dan-Li Zhang ◽  
...  
Keyword(s):  
Electron Beam ◽  
Phase Change ◽  
Crystalline Phase ◽  
Electron Beam Irradiation ◽  
Phase Change Materials ◽  
Beam Irradiation ◽  
In Situ Study
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