scholarly journals Combined laser and magnetic field treatment of YFeO3—containing films grown by spray-pyrolysis

2004 ◽  
Vol 2 (1) ◽  
pp. 188-195
Author(s):  
N. Mihailov ◽  
O. Vankov ◽  
N. Petrova ◽  
D. Kovacheva
Keyword(s):  
Magnetic Field ◽  
Spray Pyrolysis ◽  
Pulse Duration ◽  
Fused Silica ◽  
Crystallite Sizes ◽  
Citric Complexes ◽  
Magnetic Field Treatment ◽  
Glycol Solution ◽  
The Magnetic Field ◽  
Post Deposition

AbstractThin films (50–1200 nm) of YFeO3 were deposited on fused silica substrates by spray-pyrolysis using ethylene glycol solution of Y-Fe(III) citric complexes. The films were post deposition annealed at 750°C in static air for 2 h. Films obtained in this way were afterwards irradiated by a burst mode operated Nd-YAG laser (pulse energy 650 mJ, pulse duration 700 μs, energy density 110 mJ/cm2). The laser’s onset was synchronized with that of a magnetic field pulse of nearly square shape (magnetic induction 0.5 T, pulse duration 900 μs). The samples were placed normally to the direction of the magnetic field. The treatment does not affect the phase composition of the film but significantly increases the crystallite sizes of the phases presenting in the sample. The saturation magnetization of the films decreases as a result of the laser and magnetic field treatment and the coercive force increases by 50%.

Initial study of strengthening of NiAl–Cr(Mo)–Hf alloys by strong magnetic field

2005 ◽  
Vol 20 (2) ◽  
pp. 295-298 ◽  
Author(s):  
G.J. Ma ◽  
C.W. Wu ◽  
W.L. Zhou ◽  
X.L. Guo ◽  
M.F. Ren ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Strong Magnetic Field ◽  
Electron Probe Microanalysis ◽  
Electron Probe ◽  
Bending Strength ◽  
Initial Study ◽  
Magnetic Field Treatment ◽  
The Magnetic Field ◽  
Fracture Section ◽  
Nial Matrix

It was found that after treatment under 10T magnetic field and temperature 900 °C the bending strength of NiAl–Cr(Mo)–Hf alloy is increased by about 75%. The fracture section observation shows that the specimens' ductility is enhanced by the magnetic field treatment. Electron probe microanalysis shows that after treatment of the magnetic field the Heusler phases at NiAl/Cr(Mo) grain boundaries are partially dissolved and the small Heusler phases particles at Cr(Mo) and matrix phases interfaces almost dissolved into NiAl matrix.

Enhancement in growth and yield of mushroom using magnetic field treatment

2012 ◽  
Vol 26 (4) ◽  
pp. 375-380 ◽  
Author(s):  
Y. Jamil ◽  
Zia ul Haq ◽  
M. Iqbal ◽  
T. Perveen ◽  
N. Amin
Keyword(s):  
Magnetic Field ◽  
Treatment Effects ◽  
Magnetic Treatment ◽  
Growth And Yield ◽  
Laboratory Conditions ◽  
Full Wave ◽  
Sinusoidal Magnetic Field ◽  
Magnetic Field Treatment ◽  
The Magnetic Field

Abstract The magnetic treatment effects on mushroom spawn growth and yield were studied. The spawn of mushroom were exposed to full-wave rectified sinusoidal magnetic field. The spawn were grown after magnetic field treatment under controlled laboratory conditions. The magnetic field treatment resulted in significant increase (P<0.05) in the growth and yield of mushroom. The number of pin heads formed, number of pin heads developed into mature mushrooms, fresh (wet) and dry masses increased up to 38.18, 34.83, 76.43, and 38.26%, respectively, while reduction in number of days for spawn complete running and number of days for appearance of pin heads was found to be -3.14 and -26.86%, respectively.

Effect of Magnetic Field Treatment on Temperature-Sensing Property of Polyethylene-Based PTC Composites

2011 ◽  
Vol 335-336 ◽  
pp. 23-27 ◽  
Author(s):  
Chang Ming Li ◽  
Yang Wang ◽  
Xian Wei Yan ◽  
Yan Ming Yang ◽  
Ying Yang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Positive Temperature Coefficient ◽  
Temperature Sensing ◽  
Room Temperature Resistivity ◽  
Positive Temperature ◽  
Hot Press ◽  
Powder Composites ◽  
Magnetic Field Treatment ◽  
The Magnetic Field ◽  
Press Molding

A static magnetic field is applied during the hot press molding of high-density polyethylene (HDPE)/carbon black (CB)/ferrous powder composites and HDPE/CB/carbon nanotube (CNT) composites. The effect of magnetic field treatment on the temperature-sensing property of polyethylene-based positive temperature coefficient (PTC) composites is investigated. Experimental results indicate that the magnetic field treatment can lead to the alignment of ferrous powders and CNT in HDPE along the direction of the applied external magnetic field, thus guaranteeing the composites have low room-temperature resistivity and high PTC intensity as the concentration of CB is cut down. This also can significantly improve mechanical property and processability of the composites. When the mass concentrations of ferrous powders and CNT are equal, HDPE/CB/ferrous powder composites present better PTC property than HDPE/CB/CNT composites after the magnetic field treatment.

A Study on Physical Technology of Induced-Resistance for Chinese Cabbages

2010 ◽  
Vol 159 ◽  
pp. 23-28
Author(s):  
Ling Chun Yu ◽  
Nai Qin Zhang
Keyword(s):  
Magnetic Field ◽  
Downy Mildew ◽  
Induced Resistance ◽  
Chinese Cabbage ◽  
Cell Membrane Permeability ◽  
Downy Mildew Resistance ◽  
Magnetic Field Effects ◽  
Magnetic Field Treatment ◽  
Magnetic Induction Intensity ◽  
The Magnetic Field

When magnetic fields with the magnetic induction intensity of 0.4T, 0.8T, 1.2T, 1.6T and 2.0T are used to deal with germinating cabbage seeds for 5min, 10min, 15min and 20min separately, the results show that the appropriate combination of field strength and time can activate peroxidase (POD) and polyphenol oxidase(PPO) apparently, and decrease the content of MDA at the same time. Through the downy mildew inoculation tests, the magnetic field effects on the induced-resistance of Chinese cabbage are significantly lower than control, indicating that magnetic field treatment improve the Chinese cabbage downy mildew resistance by removing free radicals in plants, increasing the metabolism of plant’s secondary phenols and reduce the plant tissue within the cytoplasm of the cell membrane permeability and so on.

scholarly journals Metrology techniques for the verification of the alignment of the EU gyrotron prototype for ITER

2019 ◽  
Vol 203 ◽  
pp. 04015
Author(s):  
Francisco Sanchez ◽  
Ferran Albajar ◽  
Alessandro Lo Bue ◽  
Stephano Alberti ◽  
Konstantinos Avramidis ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Pulse Duration ◽  
Short Pulse ◽  
Superconducting Magnet ◽  
Heating System ◽  
Test Facility ◽  
Magnetic Field Axis ◽  
Full Power ◽  
The Magnetic Field ◽  
The Eu

The EU gyrotron for the ITER Electron Cyclotron (EC) heating system has been developed in coordinated efforts of the EGYC Consortium, Thales ED (TED) and Fusion for Energy (F4E) and under the supervision of ITER Organization Central Team. After the successful verification of the design of the 1MW, 170 GHz hollow cylindrical cavity gyrotron operating at the nominal TE32,9 mode with a short pulse gyrotron prototype at KIT, an industrial CW gyrotron prototype was manufactured by TED and tested at ~0.8 MW output power and 180 s pulse duration, which is the limit of the HV power supply currently available at KIT. The experiments are being continued at SPC in 2018 to extend further the pulse duration, taking advantage of the existing CW full-power capabilities of the gyrotron test facility recently upgraded for the FALCON project. The gyrotron cavity interaction is very sensitive to the alignment of the internal mechanical parts of the gyrotron tube with the magnetic field generated by the superconducting magnet within a typical range of 0.2 – 0.5 mm. The control of the tolerances and deformations becomes therefore critical to achieving the target performances. With the EU gyrotron prototype it was possible to adjust the alignment of the gyrotron tube with respect to the magnetic field axis during the installation and commissioning phase. The actual shift and tilt movements were verified using advanced metrology methods such as photogrammetry. In this paper, the alignment control techniques and procedures will be discussed also in view of enhancing the reproducibility of gyrotron performance during series production.

Influence of Magnetic Field on the Unlocking Stress for Dislocation Motion in Cz-Si Depending on Pre-Annealing Time

2005 ◽  
Vol 108-109 ◽  
pp. 163-168
Author(s):  
M. Badylevich ◽  
Vitaly V. Kveder ◽  
Valeri I. Orlov ◽  
Yu. Osipyan
Keyword(s):  
Magnetic Field ◽  
Experimental Data ◽  
Annealing Time ◽  
Dislocation Motion ◽  
The State ◽  
Magnetic Field Treatment ◽  
The Magnetic Field ◽  
Thermal Prehistory

We investigated the effect of magnetic field on the unlocking stress for dislocations in Cz-Si, measured at 600oC, depending on the thermal prehistory of samples. The effect increases with increasing of the duration of sample annealing at 600oC before the magnetic field treatment. The experimental data are consistent with the assumption that the magnetic field stimulate some changes in configuration of oxygen accumulated at dislocations before the magnetic field treatment, but not the state of oxygen in a bulk.

Combined laser-magnetic field treatment of Y 3 Fe 5 O 12 films grown by spray pyrolysis from Y-Fe citric complex initial solutions

2001 ◽  
Author(s):  
Naiden I. Mihailov ◽  
Roumiana Todorovska ◽  
Stefka Groudeva-Zotova ◽  
Orlin I. Vankov ◽  
Chavdar Ghelev ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Spray Pyrolysis ◽  
Magnetic Field Treatment

Alumina Ceramic Texturing Induced by High Magnetic Field and its Microstructure

2012 ◽  
Vol 512-515 ◽  
pp. 339-343 ◽  
Author(s):  
Lin Feng Xu ◽  
Yun Feng Li ◽  
An Ze Shui ◽  
Yan Min Wang
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Heating Temperature ◽  
Heating Time ◽  
Raw Material ◽  
Particle Orientation ◽  
Alumina Powder ◽  
Magnetic Field Direction ◽  
Magnetic Field Treatment ◽  
The Magnetic Field

Various textured alumina ceramics were prepared by colloidal processing in high magnetic field and heating from alumina powder as raw material in this study. The effects of the magnetic field strength, heating time and heating temperature on the particle orientation were systematically examined for these samples with scanning electron microscope (SEM) and X-ray diffraction (XRD) etc. The experimental results showed that alumina grains are polyhedral ball shape of, no textured structure exists in the sintered bodies without magnetic field treatment; the alumina grains align with the c-axis parallel the magnetic field direction under high magnetic field, the grains present strip shape in the sintered alumina bodies with the magnetic field treatment; the particle orientation degree increases with increasing the heating time and heating temperature; when the sintering temperature achieves about 1823K, the textured microstructure can be obviously observed in the sintered alumina bodies.

Effect of Raman-pulse duration related to the magnetic field gradient in high-precision atom gravimeters

2018 ◽  
Vol 27 (3) ◽  
pp. 030303
Author(s):  
Yuan Cheng ◽  
Yu-Jie Tan ◽  
Min-Kang Zhou ◽  
Xiao-Chun Duan ◽  
Cheng-Gang Shao ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Gradient ◽  
Pulse Duration ◽  
High Precision ◽  
Magnetic Field Gradient ◽  
The Magnetic Field

Heating of a Theta-Pinch Plasma by a CO2 Laser

1971 ◽  
Vol 49 (12) ◽  
pp. 1685-1687 ◽  
Author(s):  
J. Martineau ◽  
H. Pépin
Keyword(s):  
Magnetic Field ◽  
Laser Pulse ◽  
Pulse Duration ◽  
Co2 Laser ◽  
Magnetic Confinement ◽  
Deuterium Plasma ◽  
Ion Temperature ◽  
Theta Pinch ◽  
Absorbed Power ◽  
The Magnetic Field

The heating of a theta-pinch deuterium plasma by a CO2 laser has been studied as a function of pulse duration and energy. A hydrodynamical approach was used with temperatures and densities assumed uniform in a fully ionized plasma. This model takes into account the dynamics of the magnetic field, the axial and radial magnetic confinement, the shape of the laser pulse, and energy transferred to the plasma by inverse bremsstrahlung. We discuss the results (dimensions, temperature, absorbed power) snowing that an increase in pulse duration results in higher electron and ion temperature.

Sign in / Sign up

Export Citation Format

Share Document