scholarly journals Nanofiber and Nanofiber Powder of Syndiotactic Polystyrene Fabricated by Laser-Heated Drawing of Sea-Island-Type Conjugated-Spun Fiber

2018 ◽  
Vol 74 (8) ◽  
pp. 186-195
Author(s):  
Risa Yasoshima ◽  
Takeharu Tajima ◽  
Hideaki Yamaguchi ◽  
Toshifumi Ikaga ◽  
Yutaka Ohkoshi ◽  
...  
Keyword(s):  
Syndiotactic Polystyrene ◽  
Island Type ◽  
Spun Fiber ◽  
Laser Heated

scholarly journals Laser‐Heated Drawing of Syndiotactic Polystyrene Fiber

2015 ◽  
Vol 71 (10) ◽  
pp. 310-316 ◽  
Author(s):  
Tatsuya Himeno ◽  
Toshifumi Ikaga ◽  
Yutaka Ohkoshi ◽  
Kyoung Hou Kim ◽  
Takeharu Tajima ◽  
...  
Keyword(s):  
Syndiotactic Polystyrene ◽  
Laser Heated

scholarly journals Fiber Structure Development of Syndiotactic Polystyrene after Necking during the Laser-Heated Drawing Process

2017 ◽  
Vol 73 (7) ◽  
pp. 158-169 ◽  
Author(s):  
Gaku Matsuno ◽  
Toshifumi Ikaga ◽  
Kyoung-Hou Kim ◽  
Yutaka Ohkoshi ◽  
Takeharu Tajima ◽  
...  
Keyword(s):  
Syndiotactic Polystyrene ◽  
Drawing Process ◽  
Fiber Structure ◽  
Structure Development ◽  
Laser Heated

scholarly journals Poly(ethylene terephthalate) Nanofibers Made by Sea–Island-Type Conjugated Melt Spinning and Laser-Heated Flow Drawing

2007 ◽  
Vol 28 (6) ◽  
pp. 792-795 ◽  
Author(s):  
Kazuhiro Nakata ◽  
Kenji Fujii ◽  
Yutaka Ohkoshi ◽  
Yasuo Gotoh ◽  
Masanobu Nagura ◽  
...  
Keyword(s):  
Melt Spinning ◽  
Ethylene Terephthalate ◽  
Poly Ethylene Terephthalate ◽  
Island Type ◽  
Poly Ethylene ◽  
Laser Heated

Multilayer Polymeric Nano composite Membrane for Oxygen Separation

2019 ◽  
Vol 1 (2) ◽  
pp. 1-11
Author(s):  
Gobi Nallathambi ◽  
Hazel Dhinakaran
Keyword(s):  
Polymer Concentration ◽  
Sio2 Nanoparticles ◽  
Air Separation ◽  
Regression Equations ◽  
Permeate Flux ◽  
Nano Composite ◽  
Box Behnken Design ◽  
Oxygen Selectivity ◽  
Multilayer Membrane ◽  
Spun Fiber

Air separation is a process of separating primary components from the atmospheric air. Development of membrane technologies plays a key role in air separation. Multi-layer polymeric nanocomposite membranes have been developed by a novel technique using Polyacrylonitrile (PAN) and cellulose acetate (CA) along with nano silica particles (SiO2) to obtain a higher oxygen selectivity and permeability. For the construction of the multilayer membrane, the Box-Behnken design has been used by employing three independent variables namely PAN Electro spinning time, the SiO2 percentage in the PAN polymer and CA/PEG polymer concentration. The developed membranes have been characterized for its surface morphology and physical properties. Along with the analysis of compound desirability, the results were also subject to statistical analysis in order to form regression equations. The electro spun fiber diameter increases along with the concentration of SiO2 nanoparticles and the range is from 50 nm to 400 nm. Moreover, the maximum pore size on the surface of the membrane lies between 200 to 400 nm whereas the maximum percentage of oxygen purity obtained is 48 with the permeate flux of 5.45 cm3/cm2/min.

scholarly journals Study of multicharged heavy ion generation from CO2 laser-produced plasma

1996 ◽  
Vol 14 (3) ◽  
pp. 347-368 ◽  
Author(s):  
V.Yu. Baranov ◽  
K.N. Makarov ◽  
V.C. Roerich ◽  
Yu.A. Satov ◽  
A.N. Starostin ◽  
...  
Keyword(s):  
Hadron Collider ◽  
Laser System ◽  
Heavy Ion ◽  
Ion Source ◽  
Lead Ion ◽  
Ion Generation ◽  
Wavelength Radiation ◽  
Laser Heated ◽  
Work Done ◽  
Power Densities

The results of lead ion generation with charge state from Pb10+ to Pb35+ from laser-heated plasma are presented. CO2 lasers producing 10.6-μm wavelength radiation at power densities in the range 4.1011-6.1014 W/cm2 in TBKI and CERN were used. Results of detailed numerical simulations presented in the paper are in good agreement with the experimental data. Work done in collaboration with CERN, ITEP, and TBKI was aimed at the specification of requirements for a laser system that will be able to drive an ion source for the hadron collider (LHC) at CERN.

scholarly journals Laser Floating Zone Growth: Overview, Singular Materials, Broad Applications, and Future Perspectives

Crystals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 38
Author(s):  
Francisco Rey-García ◽  
Rafael Ibáñez ◽  
Luis Alberto Angurel ◽  
Florinda M. Costa ◽  
Germán F. de la Fuente
Keyword(s):  
Equilibrium Phase ◽  
Polycrystalline Materials ◽  
Floating Zone ◽  
High Crystalline Quality ◽  
Experimental Parameters ◽  
Phase Selectivity ◽  
Oriented Polycrystalline ◽  
Laser Heated ◽  
Lfz Technique ◽  
Zone Growth

The Laser Floating Zone (LFZ) technique, also known as Laser-Heated Pedestal Growth (LHPG), has been developed throughout the last several decades as a simple, fast, and crucible-free method for growing high-crystalline-quality materials, particularly when compared to the more conventional Verneuil, Bridgman–Stockbarger, and Czochralski methods. Multiple worldwide efforts have, over the years, enabled the growth of highly oriented polycrystalline and single-crystal high-melting materials. This work attempted to critically review the most representative advancements in LFZ apparatus and experimental parameters that enable the growth of high-quality polycrystalline materials and single crystals, along with the most commonly produced materials and their relevant physical properties. Emphasis will be given to materials for photonics and optics, as well as for electrical applications, particularly superconducting and thermoelectric materials, and to the growth of metastable phases. Concomitantly, an analysis was carried out on how LFZ may contribute to further understanding equilibrium vs. non-equilibrium phase selectivity, as well as its potential to achieve or contribute to future developments in the growth of crystals for emerging applications.

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