Local structure of amorphous Ag5In5Sb60Te30 and In3SbTe2 phase change materials revealed by X-ray photoelectron and Raman spectroscopic studies

2017 ◽  
Vol 122 (1) ◽  
pp. 015305 ◽  
Author(s):  
Smriti Sahu ◽  
Anbarasu Manivannan ◽  
Habibuddin Shaik ◽  
G. Mohan Rao
Keyword(s):  
Phase Change ◽  
Local Structure ◽  
Phase Change Materials ◽  
Spectroscopic Studies ◽  
X Ray ◽  
Raman Spectroscopic

High pressure X-ray diffraction and Raman spectroscopic studies of the phase change of D2O ice VII at approximately 11 GPa

2014 ◽  
Vol 34 (3) ◽  
pp. 289-296 ◽  
Author(s):  
Hisako Hirai ◽  
Hirokazu Kadobayashi ◽  
Takahiro Matsuoka ◽  
Yasuo Ohishi ◽  
Yoshitaka Yamamoto
Keyword(s):  
High Pressure ◽  
Phase Change ◽  
Spectroscopic Studies ◽  
X Ray Diffraction ◽  
X Ray ◽  
Raman Spectroscopic

scholarly journals pH-controlled synthesis of sustainable lauric acid/SiO2 phase change material for scalable thermal energy storage

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shafiq Ishak ◽  
Soumen Mandal ◽  
Han-Seung Lee ◽  
Jitendra Kumar Singh
Keyword(s):  
Electron Microscopy ◽  
Phase Change ◽  
Lauric Acid ◽  
Photoelectron Spectroscopy ◽  
Phase Change Materials ◽  
Precursor Solution ◽  
Thermal Reliability ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Heating And Cooling

AbstractLauric acid (LA) has been recommended as economic, eco-friendly, and commercially viable materials to be used as phase change materials (PCMs). Nevertheless, there is lack of optimized parameters to produce microencapsulated PCMs with good performance. In this study, different amounts of LA have been chosen as core materials while tetraethyl orthosilicate (TEOS) as the precursor solution to form silicon dioxide (SiO2) shell. The pH of precursor solution was kept at 2.5 for all composition of microencapsulated LA. The synthesized microencapsulated LA/SiO2 has been characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), X-Ray photoelectron spectroscopy (XPS), Scanning electron microscopy (SEM), and Transmission electron microscopy (TEM). The SEM and TEM confirm the microencapsulation of LA with SiO2. Thermogravimetric analysis (TGA) revealed better thermal stability of microencapsulated LA/SiO2 compared to pure LA. PCM with 50% LA i.e. LAPC-6 exhibited the highest encapsulation efficiency (96.50%) and encapsulation ratio (96.15%) through Differential scanning calorimetry (DSC) as well as good thermal reliability even after 30th cycle of heating and cooling process.

Unravelling the interplay of local structure and physical properties in phase-change materials

2005 ◽  
Vol 5 (1) ◽  
pp. 56-62 ◽  
Author(s):  
Wojciech Wełnic ◽  
Ariesto Pamungkas ◽  
Ralf Detemple ◽  
Christoph Steimer ◽  
Stefan Blügel ◽  
...  
Keyword(s):  
Physical Properties ◽  
Phase Change ◽  
Local Structure ◽  
Phase Change Materials

scholarly journals X-ray diffraction and Raman spectroscopic studies of Zn-substituted carrboydite-like compounds

2006 ◽  
Vol 100 (1) ◽  
pp. 174-186 ◽  
Author(s):  
Yu-Hsiang Lin ◽  
Moses O. Adebajo ◽  
J. Theo Kloprogge ◽  
Wayde N. Martens ◽  
Ray L. Frost
Keyword(s):  
Spectroscopic Studies ◽  
X Ray Diffraction ◽  
X Ray ◽  
Raman Spectroscopic

scholarly journals Copper microsphere hybrid mesoporous carbon as matrix for preparation of shape-stabilized phase change materials with improved thermal properties

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Yi Liu ◽  
Yan Chen ◽  
Junwei Zhang ◽  
Junkai Gao ◽  
Zhi Han
Keyword(s):  
Thermal Properties ◽  
Phase Change ◽  
Photoelectron Spectroscopy ◽  
Mesoporous Carbon ◽  
Phase Change Materials ◽  
Copper Ions ◽  
Thermal Constant ◽  
Step Method ◽  
Scanning Calorimetry ◽  
X Ray

Abstract Copper microsphere hybrid mesoporous carbon (MPC-Cu) was synthesized by the pyrolysis of polydopamine microspheres doped with copper ions that were prepared using a novel, facile and simple one-step method of dopamine biomimetic polymerization and copper ion adsorption. The resulting MPC-Cu was then used as a supporter for polyethylene glycol (PEG) to synthesize shape-stabilized phase change materials (PEG/MPC-Cu) with enhanced thermal properties. PEG/MPC-Cu was studied by scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, differential scanning calorimetry and thermal constant analysis. The results demonstrated that the thermal conductivity of PEG/MPC-Cu was 0.502 W/(m K), which increased by 100% compared to pure PEG [0.251 W/(m K)]. The melting enthalpy of PEG/MPC-Cu was 95.98 J/g, indicating that PEG/MPC-Cu is a promising candidate for future thermal energy storage applications. In addition, the characterization results suggested that PEG-MPC-Cu possessed high thermal stability. Therefore, the method developed in this paper for preparing shape-stabilized phase change materials with improved thermal properties has substantial engineering application prospects.

From local structure to nanosecond recrystallization dynamics in AgInSbTe phase-change materials

2011 ◽  
Vol 10 (2) ◽  
pp. 129-134 ◽  
Author(s):  
Toshiyuki Matsunaga ◽  
Jaakko Akola ◽  
Shinji Kohara ◽  
Tetsuo Honma ◽  
Keisuke Kobayashi ◽  
...  
Keyword(s):  
Phase Change ◽  
Local Structure ◽  
Phase Change Materials
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