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Conductivity and frequency dependent specific absorption rate
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10.1063/1.4791928
/content/aip/journal/jap/113/7/10.1063/1.4791928
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/7/10.1063/1.4791928
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

The concentration dependent properties of complex permittivity at 20 °C. (a) 13.56 MHz, (b) 2.45 GHz.

Image of FIG. 2.
FIG. 2.

Complex permittivity of DI-water and NaCl solution at 20 °C (S = 35): (a) frequency dependent complex permittivity of NaCl solution; (b) complex permittivity of NaCl solution in the low frequency range 1–20 MHz; and (c) complex permittivity of NaCl solution in the microwave range 2–3 GHz.

Image of FIG. 3.
FIG. 3.

Boundary conditions of electric fields. (a) for the perpendicular components, and for the parallel components. (b) A plane wave incident on the dielectric-dielectric interface boundary conditions have to be enforced.

Image of FIG. 4.
FIG. 4.

The transmission coefficient of an EM wave incidenting on an air-dielectric interface. (a) 13.56 MHz; (b) 2.45 GHz.

Image of FIG. 5.
FIG. 5.

Applicator used for food/material processing where two parallel plates are connected to a voltage source and a piece of material is placed in the air gap.

Image of FIG. 6.
FIG. 6.

(a) Frequency dependent heating rate of NaCl solutions of different conductivity. (b) At different frequency, the concentration giving peak temperature rise is different. (c) Frequency-dependent peak ionic conductivity.

Image of FIG. 7.
FIG. 7.

The dependence of the heating rate on the salinity and frequency in NaCl solution (incident electric field strength is 1 V/m).

Image of FIG. 8.
FIG. 8.

The 13.56 MHz heating device (for illustration, the Petri dish and waveguide are not to scale). Reproduced by permission from Liu et al., Nanoscale 4, 3945–3953 (2012). Copyright 2012 by The Royal Society of Chemistry.

Image of FIG. 9.
FIG. 9.

The field strength along the vertical central line of the microstrip waveguide. (a) The magnitude; (b) the phase.

Image of FIG. 10.
FIG. 10.

Two dimensional field distribution in the Petri dish.

Image of FIG. 11.
FIG. 11.

Comparison of simulation, theoretical calculation, and measurement of a bulk heating of NaCl solution at 13.56 MHz. Portion of the results (measurement and CST simulation) are reproduced by permission from Liu et al., Nanoscale 4, 3945–3953 (2012). Copyright 2012 by The Royal Society of Chemistry.

Image of FIG. 12.
FIG. 12.

(a) Schematic diagram of the microwave heating setup; (b) transient temperature rise of DI-water and NaCl solution (power level 800 W and sample volume 50 ml).

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/content/aip/journal/jap/113/7/10.1063/1.4791928
2013-02-20
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Conductivity and frequency dependent specific absorption rate
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/7/10.1063/1.4791928
10.1063/1.4791928
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