Anode power deposition in applied field magnetoplasmadynamic thruster

2021 ◽  
Vol 130 (24) ◽  
pp. 243305
Author(s):  
Peng Wu ◽  
Yibai Wang ◽  
Yong Li ◽  
Zhiyuan Chen ◽  
Tao Zhu ◽  
...  
Keyword(s):  
Applied Field ◽  
Power Deposition

Anode power deposition in an applied-field segmented anode MPD thruster

1994 ◽  
Vol 10 (2) ◽  
pp. 262-268 ◽  
Author(s):  
A. D. Gallimore ◽  
R. M. Myers ◽  
A. J. Kelly ◽  
R. G. Jahn
Keyword(s):  
Applied Field ◽  
Power Deposition

Dynamic response of a blue phase to an applied field

1992 ◽  
Vol 2 (10) ◽  
pp. 1803-1809
Author(s):  
V. K. Dolganov ◽  
G. Heppke ◽  
H.-S. Kitzerow
Keyword(s):  
Dynamic Response ◽  
Applied Field ◽  
Blue Phase

Operation Characteristics of Steady-State, Applied Field, Rectangular Magnetoplasmadynamics (MPD) Thruster

2015 ◽  
Vol 63 (2) ◽  
pp. 37-44 ◽  
Author(s):  
Daisuke ICHIHARA ◽  
Shota HARADA ◽  
Hisashi KATAOKA ◽  
Shigeru YOKOTA ◽  
Akihiro SASOH
Keyword(s):  
Steady State ◽  
Applied Field ◽  
Operation Characteristics

scholarly journals Mechanochemical Synthesis and Nitrogenation of the Nd1.1Fe10CoTi Alloy for Permanent Magnet

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3854
Author(s):  
Hugo Martínez Sánchez ◽  
George Hadjipanayis ◽  
Germán Antonio Pérez Alcázar ◽  
Ligia Edith Zamora Alfonso ◽  
Juan Sebastián Trujillo Hernández
Keyword(s):  
Mechanochemical Synthesis ◽  
Applied Field ◽  
Volume Fraction ◽  
Synthesis Method ◽  
High Energy ◽  
Direction Parallel ◽  
Best Value ◽  
Heat Treated ◽  
Bcc Phase ◽  
First Time

In this work, the mechanochemical synthesis method was used for the first time to produce powders of the nanocrystalline Nd1.1Fe10CoTi compound from Nd2O3, Fe2O3, Co and TiO2. High-energy-milled powders were heat treated at 1000 °C for 10 min to obtain the ThMn12-type structure. Volume fraction of the 1:12 phase was found to be as high as 95.7% with 4.3% of a bcc phase also present. The nitrogenation process of the sample was carried out at 350 °C during 3, 6, 9 and 12 h using a static pressure of 80 kPa of N2. The magnetic properties Mr, µ0Hc, and (BH)max were enhanced after nitrogenation, despite finding some residual nitrogen-free 1:12 phase. The magnetic values of a nitrogenated sample after 3 h were Mr = 75 Am2 kg–1, µ0Hc = 0.500 T and (BH)max = 58 kJ·m–3. Samples were aligned under an applied field of 2 T after washing and were measured in a direction parallel to the applied field. The best value of (BH)max~114 kJ·m–3 was obtained for 3 h and the highest µ0Hc = 0.518 T for 6 h nitrogenation. SEM characterization revealed that the particles have a mean particle size around 360 nm and a rounded shape.

scholarly journals A unified perturbative approach to electrocaloric effects

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Mónica Graf ◽  
Jorge Íñiguez
Keyword(s):  
External Field ◽  
Taylor Series ◽  
Physical Interpretation ◽  
Applied Field ◽  
Atomistic Simulations ◽  
Small Field ◽  
Electrocaloric Effect ◽  
Perturbative Approach ◽  
Similarities And Differences ◽  
Straightforward Interpretation

AbstractThe electrocaloric effect, that is, the temperature change experienced by an insulator upon application of an electric field, offers promising ecofriendly alternatives to refrigeration. However, the theoretical treatments of this response are mostly case specific and lack a unified picture revealing the similarities and differences among the various known effects. Here, we show that the electrocaloric effect lends itself to a straightforward interpretation when expressed as a Taylor series in the external field. Our formalism explains in a unified and simple way the most notable small-field effects reported in the literature, namely the so-called normal and inverse electrocaloric responses, corresponding to an increase or decrease of temperature under applied field, as usually found in ferroelectrics or antiferroelectrics, respectively. This helps us to clarify their physical interpretation. We then discuss in detail atomistic simulations for the prototype ferroelectric PbTiO3, explicitly evaluating subtle predictions of the theory, such as the occurrence of competing contributions to the electrocaloric response.

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