Influence of Thermal Treatment on YBa2Cu3O7-x Thick Films Prepared by Electrophoretic Deposition on Ni and Ag Substrates

2007 ◽  
Vol 1001 ◽  
Author(s):  
Laurent Dusoulier ◽  
Samuel Denis ◽  
Michel Dirickx ◽  
Philippe Vanderbemden ◽  
Marcel Ausloos ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Electrophoretic Deposition ◽  
Magnetic Induction ◽  
Sintering Temperature ◽  
Low Frequency ◽  
Shielding Effect ◽  
Magnetic Shielding ◽  
Chemical Contamination ◽  
Sintering Atmosphere ◽  
Ag Substrate

AbstractWe have studied the sintering parameters of YBa2Cu3O7-x (YBCO) coatings produced by electrophoretic deposition (EPD) on Ag and Ni substrates. The maximal sintering temperature is ∼ 930°C due to partial melting and chemical contamination for Ag and Ni substrates respectively. Increasing the sintering duration does not improve significantly the densification. When Ar sintering atmosphere is used, the coating density is strongly increased on Ag substrates while adhesion is poor on Ni substrates. The Ar-sintered YBCO coating deposited on planar Ag substrate displays a significant magnetic shielding effect for low frequency applied magnetic induction.

scholarly journals Magnetic induction and its reversal in spherical Iron shells

1917 ◽  
Vol 93 (648) ◽  
pp. 129-148
Keyword(s):  
Magnetic Induction ◽  
A Priori ◽  
Close Packing ◽  
Shielding Effect ◽  
Magnetic Shielding ◽  
Internal Space ◽  
Constant Field ◽  
Large Space ◽  
Precise Knowledge ◽  
Magnetic Phenomena

In a previous communication to the Society, an account was given of an investigation of the magnetic shielding of a large space, by the use of a series of spherical iron shells. The basis of this investigation, which is still in progress, is strictly quantitative, and the work has been retarded, to a great extent, by the fact that several processes adopted commonly by various investigators of magnetic phenomena have never been examined accurately on the theoretical side, and in several cases even on the experimental side, to an order of precision which is sufficient for delicate measurements. One of the main objects ultimately in view, in the work described already, is the production, throughout the volume of a large iron specimen, of a magnetic field so small, in comparison with that of the earth, for example, as to render possible some accurate conclusions regarding the behaviour of iron under indefinitely small magnetic forces. This behaviour is at present a matter of doubt, and it remains to be shown that the indications of its real nature, obtained in earlier papers by one of us, continue to point in the same direction when the force is decreased below any values which have been employed hitherto. In the experiments described in the former paper, a field so low as 0·0033 C. G. S. unit was obtained in a spherical space of radius 32·5 cm. by the use of four concentric shells. It was accompanied, however, by a leakage field of 0·006 C. G. S. unit, and the shells still showed some traces of permanent polarisation after continued treatment with many reversals of a slowly decreasing current. This method of demagnetisation is used extensively, and in its application coils have sometimes been wound somewhat loosely on the iron to be demagnetised, and the constant field given by Maxwell’s formula for a spherical internal space surrounded by a very closely wound coil assumed to exist. But if a thin shell is wound in this manner, although the more internal parts may be subject to this field, the results must be widely different in the outer material of the shell. Further experimental work on the improvement of magnetic shielding beyond the order obtained already— in fact by such methods as the employment of a very small magnetising current to remove, in the internal space, the small part of the earth’s field which may remain after the operation of the shielding effect of a set of shells —requires a precise knowledge of the value of the magnetic induction in a shell, or one member of a set of shells, wound by a spherical helical coil. For the condition of indefinitely close packing is found to be essential to the success of Maxwell’s formula, which—but only from this particular point of view—does not appear, either from an a priori theoretical consideration, or from the experimental results described in the present paper, to have the large range of validity which has been assumed for it hitherto by practical workers on magnetic phenomena.

Testing Thick Magnetic Shielding Effect on a New Low Frequency RFIDs System

2008 ◽  
Vol 56 (12) ◽  
pp. 3838-3843 ◽  
Author(s):  
D. Ciudad Rio-Perez ◽  
P.C. Arribas ◽  
C. Aroca ◽  
P. Sanchez
Keyword(s):  
Low Frequency ◽  
Shielding Effect ◽  
Magnetic Shielding

Effects of Sintering Conditions on Properties of a Warm Compacted Stainless Steel Powder

2012 ◽  
Vol 217-219 ◽  
pp. 483-486
Author(s):  
Mei Yuan Ke
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Sintered Density ◽  
Sintering Temperature ◽  
Steel Powder ◽  
Stainless Steel Powder ◽  
Sintering Atmosphere ◽  
Comprehensive Properties ◽  
Ammonia Atmosphere ◽  
Sintering Conditions

Effects of Sintering atmosphere and temperature on properties of warm compacted 410L stainless steel powder were studied. Sintered density, hardness, tensile strength and elongation were measured. Results showed that in order to achieve high comprehensive properties, the optimal sintering temperature was 1230°C for 410L stainless steel powder. At the same sintering temperature, density and hardness sintered in vacuum were much higher than that sintered in cracked ammonia while tensile strength sintered in cracked ammonia were much higher than that in vacuum. When sintered in vacuum at 1230°C, sintered density was 7.45 g•cm-3, hardness was 65 HRB, tensile strength was 410 MPa and elongation was 29.5%. When sintered in cracked ammonia atmosphere at 1230°C, sintered density was 7.26 g•cm-3, hardness was 97 HRB, tensile strength was 515 MPa and elongation was 3.8%.

Influence of thermal treatment in high and low frequency dynamics of silica porous systems

2004 ◽  
Vol 345-346 ◽  
pp. 61-65 ◽  
Author(s):  
S. Caponi ◽  
A. Fontana ◽  
M. Mattarelli ◽  
M. Montagna ◽  
F. Terki ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Low Frequency

scholarly journals A New Methodology to Predict the Magnetic Shielding Effectiveness of Enclosures at Low Frequency in the Near Field

2015 ◽  
Vol 51 (3) ◽  
pp. 1-4 ◽  
Author(s):  
Amin Frikha ◽  
Mohamed Bensetti ◽  
Fabrice Duval ◽  
Nabil Benjelloun ◽  
Frederic Lafon ◽  
...  
Keyword(s):  
Near Field ◽  
Low Frequency ◽  
Magnetic Shielding ◽  
Shielding Effectiveness

Effect of Thermal Treatment on Thermoelectric Properties of Extruded TiO2 Ceramics

2014 ◽  
Vol 604 ◽  
pp. 249-253 ◽  
Author(s):  
Agnese Pura ◽  
Janis Locs ◽  
Liga Berzina-Cimdina
Keyword(s):  
Heat Treatment ◽  
Electrical Conductivity ◽  
Thermal Treatment ◽  
Seebeck Coefficient ◽  
Heating Rate ◽  
Thermoelectric Properties ◽  
Sintering Temperature ◽  
Extrusion Process ◽  
Vacuum Heat Treatment ◽  
Treatment Conditions

TiO2samples were obtained by extrusion process, sintered in air at 1000 °C, 1100 °C, 1200°C and 1300 °C and, afterwards, thermally treated under vacuum conditions at 1250 °C for 1 hour applying two different heating/cooling rates (2 °C/min and 5 °C/min). It was found that thermal treatment conditions substantially affected thermoelectric properties of the samples. Increasing sintering temperature, during the sample thermal treatment in air, the electrical conductivity of the specimens increased, while Seebeck coefficient decreased. With an increase in the heating rate during the vacuum heat treatment of the samples, the electrical conductivity of the samples decreased, while Seebeck coefficient increased.

Low Frequency Magnetic Shielding Effectiveness of a Conducting Plate With Periodic Apertures

2020 ◽  
pp. 1-8 ◽  
Author(s):  
Wanxin Bai ◽  
Feng Ning ◽  
Xiaochen Yang ◽  
Chongqing Jiao ◽  
Longlong Chen
Keyword(s):  
Low Frequency ◽  
Magnetic Shielding ◽  
Shielding Effectiveness ◽  
Conducting Plate

Magnetic Shielding Effect of Bi Oxide Superconducting Vessels with a SQUID

1991 ◽  
pp. 591-594 ◽  
Author(s):  
Atsushi Koike ◽  
Kazutomo Hoshino ◽  
Hiroshi Ohta ◽  
Eichi Sudoh ◽  
Koichi Numata ◽  
...  
Keyword(s):  
Shielding Effect ◽  
Magnetic Shielding
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