Results 11 to 20 of about 2,381 (212)

Ultraviolet Upconversion Emission of CaAl₂SiO₆ Polycrystals Doped with Pr³⁺ Ions [PDF]

Molecules
The spectroscopic properties of Pr3+ ions in the aluminosilicate matrix were investigated for the first time. Synthesis of CaAl2SiO6 (CASO) polycrystals doped with Pr3+ ions was carried out using the sol–gel method.
Karol Lemański, Nadiia Rebrova, Patrycja Zdeb-Stańczykowska, Przemysław Jacek Dereń   +3 more
doaj   +2 more sources

Domain‐Wall Driven Suppression of Thermal Conductivity in a Ferroelectric Polycrystal [PDF]

Advanced Science
A common strategy for reducing the thermal conductivity of polycrystalline systems is to increase the number of grain boundaries. Indeed, grain boundaries enhance the probability of phonon scattering events, which has been applied to control the thermal ...
Rachid Belrhiti‐Nejjar, Manuel Zahn, Patrice Limelette, Max Haas, Lucile Féger, Isabelle Monot‐Laffez, Nicolas Horny, Dennis Meier, Fabien Giovannelli, Jan Schultheiß, Guillaume F. Nataf   +10 more
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Synthesis and thermal stability of topological semimetal RMnSb2 (R = Yb, Sr, Ba, Eu) [PDF]

Science and Technology of Advanced Materials
YbMnSb2, a topological semimetal with an exotic band structure, has recently been found to exhibit potential thermoelectric transport properties in its single-crystalline formality.
Shuo Liu, Airan Li, Xiaowen Hao, Mengzhao Chen, Yi Huang, Yinde Yu, Chin-Wei Wang, Qingyong Ren, Tiejun Zhu, Chenguang Fu   +9 more
doaj   +2 more sources

UVC Stokes and Anti-Stokes Emission of Ca₉Y(PO₄)₇ Polycrystals Doped with Pr³⁺ Ions [PDF]

Molecules
The recent COVID-19 pandemic has made everyone aware of the threat of viruses and the growing number of antibiotic-resistant bacteria. It has become necessary to find new methods to combat these hazards. One tool that could be used is UVC radiation, i.e.,
Karol Lemański, Olha Bezkrovna, Nadiia Rebrova, Radosław Lisiecki, Patrycja Zdeb, Przemysław Jacek Dereń   +5 more
doaj   +2 more sources

Approaching crystal’s limit of thermoelectrics by nano-sintering-aid at grain boundaries [PDF]

Nature Communications
Grain boundary plays a vital role in thermoelectric transports, leading to distinct properties between single crystals and polycrystals. Manipulating the grain boundary to realize good thermoelectric properties in polycrystals similar as those of single ...
Jingdan Lei, Kunpeng Zhao, Jincheng Liao, Shiqi Yang, Ziming Zhang, Tian-Ran Wei, Pengfei Qiu, Min Zhu, Lidong Chen, Xun Shi   +9 more
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Conducting and dielectric properties of Na₃Fe₂(PO₄)₃ and Na₂FePO₄F

Eurasian Journal of Physics and Functional Materials, 2021
In this research, the structure parameters, conducting and dielectric properties of Na3Fe2(PO4)3 and Na2FePO4F polycrystals were studied obtained by solid-phase synthesis.
A. A. Nogai, Zh. M. Salikhodzha, A. S. Nogai, D. E. Uskenbaev   +3 more
doaj   +1 more source

Piezoelectric characteristics of PVA/DL-alanine polycrystals in d33 mode

iScience, 2023
Summary: In this study, polyvinyl alcohol (PVA)-mixed DL-alanine (PVA/DL-alanine) polycrystals are fabricated, and their piezoelectric characteristics in the d33 mode are investigated. The d33 piezoelectric coefficients of the PVA/DL-alanine polycrystals
Buil Jeon, Dongsoo Han, Giwan Yoon
doaj   +1 more source

Mechanisms of the epitaxial growth of two-dimensional polycrystals

npj Computational Materials, 2022
In the epitaxial growth of two-dimensional (2D) materials on substrates, 2D polycrystals with various shapes have been broadly observed, but their formation mechanisms are still highly elusive. Here we present a complete study on the formation mechanisms
Jichen Dong, Yunqi Liu, Feng Ding
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Features of Structures and Ionic Conductivity of Na₃Fe₂(PO₄)₃ Polycrystals Obtained by Solid Phase and Melt Methods

Ceramics, 2023
This article investigates the structures and conductive properties of polycrystals of Na3Fe2(PO4)3 obtained by solid-state and melt synthesis methods using concentrated optical radiation.
A. S. Nogai, A. A. Nogai, D. E. Uskenbaev, A. B. Utegulov, E. A. Nogai, D. D. Toleugulov   +5 more
doaj   +1 more source

Hybrid, Multiscale Numerical Simulations of the Equal Channel Angular Pressing (ECAP) using the Crystal Plasticity Theory [PDF]

Archives of Metallurgy and Materials, 2023
The FEM simulations of the ECAP including real conditions of the process – the friction between the metal extruded and the die walls, as well as, the channels rounding, were done here in two scales – macro- and micro-.
Marta Wójcik
doaj   +1 more source