magnetic ceramic manuscript published 2008 GCMEA Global Congress Microwave on Microwave Energy Application in Otsu, Japan by Kazuhito Kono, Buhei Kono shozen, co.ltd

1. The methods of increasing energy efficiency by irradiation of electromagnetic
wave in high intensity which agrees the absorption wavelength of materials
Kazuhito Kono, Buhei Kono Shozen Co.ltd E-mail address qqdt545d@waltz.ocn.ne.jp
Abstract
The absorption wavelength of organic materials is between 2.3μｍ～20μｍ.This is already
known. The absorption wavelength of organic material of food which contains Ca is 8μｍ～50μ
ｍ, but it can extend the range to 100μｍ. A lot of organic materials which have amino acids have
absorption wavelength at Terahertz range. The optimal temperature of heating organic materials is
below 200℃.The intensity of blackbody radiation at 200℃ and wavelength between 2.3μｍ～100
μｍ is small and so heating effects of molecular vibrations were regarded as small. At past
conference of Japan society of electromagnetic wave energy Application, we addressed the energy
efficiency of ceramic which was sintered Mn-Zn ferrite. When we irradiated microwaves to this
ceramic, the microwaves were transformed to infrared waves, peak wavelength 2.5μｍ～20μｍ
by eddy current loss, inductive heating and magnetic resonance. The intensity of this was amplified
more intensity than blackbody radiation. We sinter Mn-Zn-Ca ferrite inside this ceramic. When we
irradiate microwaves to this ceramic, microwaves are transformed to infrared waves at the peak
wavelength 8μｍ～50 μｍ and the range can be 100μｍ which are optimal absorption
wavelength of Ca. This is caused by electric dipole transition of microwave field and magnetic
dipole transition by Ca atom by ferrite. This is amplified more intensity than blackbody radiation.
We explain heating efficiency of organic materials which contain calcium using this ceramic by
synchronization of absorption wavelength.
Keywords Mn-Zn ferrite Mn-Zn-Ca ferrite magnetic resonance far-infrared waves Terahertz
Introduction
We sinter Mn-Zn ferrite totally which has a Curie point 210℃ inside the ceramic. When we heat
this ceramic in the microwave oven, the temperature of Mn-Zn ferrite rises until near 200℃, the
microwaves are transformed to infrared and far-infrared waves and radiate inside the ceramic.
When we irradiate microwaves to magnetic materials, the principles of temperature rises are
following three methods.
1. Inductive heating
Ｐ＝２πｆμ０ μ″Ｈ２ （1）
Ｐ; the energy by inductive heating, ｆ;frequency of electromagnetic wave,
μ 0 ; permeability of vacuum, μ″;loss of the magnetism, Ｈ ; magnetic field
2. Heating by eddy current loss
Ｗ＝ ＢｄＨ （2）
Ｗ ; energy by hysterisis, Ｂ ;the magnetic flux density, Ｈ ; magnetic field,

2. 3. Heating by magnetic resonance
Ｅ＝２πγｎＭｇμＢｔｗ （3）
Ｅ; energy by electron spin resonance,γ; gyromagnetic constant, ｎ ;number of atoms of magnetic
material, Ｍ ; magnetization, g; g constant, μ B ; Bohr magnetic constant, ｔ; relaxation time of
spin, Ｗ ; input energy of electromagnetic wave,
The temperatures of the magnetic materials rises and the infrared and far-infrared waves radiate.
The microwaves are amplified by the thermal inequlibrium by magnetic resonance and transitions
of spins of the magnetic materials and infrared and far-infrared waves with a wavelength between
2.3μm and 20μm, radiate higher intensity than the ideal intensity of blackbody radiation.
The radiated energy which is amplified is shown in following equation.
２πμＢｒｆ ２ １
Ｐ＝（ ） ｈωｎ （4）
ｈ ２π⊿ω
Ｐ;the energy of radiation,μ;magnetic moment, Ｂｒｆ;magnetic field, ｈ;planck constant,⊿ω；transit
frequency,ω; frequency of radiation, ｎ;number of atoms that are transited,
The power of the blackbody radiation and infrared waves emission from this ceramic in this case is
shown in Figure-1. The temperature of the magnetic materials which are Mn-Zn ferrite is near
200℃.But the infrared waves emission by wavelength transformation of the magnetic resonance are
near the intensity of blackbody radiation at 400℃.
We add Ca 10% to Mn-Zn ferrite in weights and make
Blackbody
Mn-Zn-Ca ferrite. We sinter Mn-Zn-Ca ferrite inside the
10
ceramic. When we heat this ceramic in the microwave
Power (W/cm-2perμ m)
1
0℃
100℃
oven, electric dipole momentum of Ca atoms and
0.1
200℃
magnetic dipole momentum of Ca atoms by the
300℃
0.01
400℃ magnetic field of Mn-Zn ferrite are transitted. Then this
500℃
0.001
ceramic radiates far-infrared waves, with a wavelength
0.0001
1 2 3 4 5 10 20 50 100 between 8 μ m and 50 μ m or 100 μ m which are
wavelength（μ m)
absorption wavelength of Ca and terahertz region.
Figure-1
When we irradiate microwaves to Mn-Zn-Ca ferrite, the energy radiated by electric dipole transition
of Ca is shown in following equation.
４ω４ ２ （５）
Ｐ＝ ｄ
３ｃ３
Ｐ；the energy of radiation, ω; frequency of radiation, c; speed of light, d; electric dipole
momentum,
The radiated energy by the magnetic dipole transition of Ca by magnetic field is shown in following
equation.
４ω４
Ｐ＝ ｍ２ （６）
3ｃ３

3. P; the energy of radiation, ω; frequency of radiation, c; speed of light, m; magnetic dipole
momentum of Ca
The intensity of energy in the wavelength from8μm
to 100 μ m by the electric dipole transition and
magnetic dipole transition of Ca which is calculated
from equation (5) and (6) are shown in Figure-2.The
shaded region is the emission from Mn-Zn-Ca
ferrite.The intensity of energy emission in the
wavelength from8μm to 100μm is more than the
blackbody radiation.
Figure-2
The absorption wavelengths of Calcium or Calcium
Apatites were shown by B.O. Fowler in the National
Insitute of Dental Research in U.S. in 1973. We show his
data in Figure-3a, 3b. From this data, the absorption
wavelength of Ca is between 8μm and 50μm or 100μm
terahertz region. We performed the following experiments
for proving thermal efficiency of microwave transformation
to far-infrared waves by using Mn-Zn-Ca ferrite in the
Figure-3a microwave oven
Experiments
We use 2 kinds of ceramic magcups which are sintered Mn-Zn ferrite
and Mn-Zn-Ca ferrite. We heat quarts glasses of water which contain
different Ca concentration and pure water 100cc using these ceramics in
the microwave oven and we measure their temperature rises and ion
values as we show experimental set up in Figure-4.The quarts glasses of
water which we used in the experiments were followings.
Figure-3b
Contrex energy 0 cal / 100ml, protein 0g, fat 0g,
carbohydrate 0g, Na 0.94mg, Ca 46.8mg,Mg 7.45mg, K
0.28mg Sulfate 112.1mg
Evian energy 0cal, protein 0g, fat 0g, carbohydrate 0g/100ml,
Na 0.7mg, Ca 8.0mg, Mg 2.6mg
Volvic energy 0cal, protein 0g, fat 0g, carbohydrate
0g/100ml Na 1.16mg, Ca 1.15mg, Mg 0.80mg, K 0.62mg
Figure-4

4. The experimental results are shown in Figure-5
Contrex Water Temperatures Evian water temperatures V W tem
olvic ater peratures Ｐｕｒｅ ｗａｔｅｒ ｔｅｍｐｅｒａｔｕｒｅs
120 120 100 100
100 100 80 80
Temperature (℃)
)
ｍａｇｃｕｐ
ｐｅｒａｔｕｒｅ （℃
80 magnetic cup 80
)
）
Temperature (℃
60
peratures(℃
magcup 60
magcup
60 60 C m
a10% agcup
Ca10% Ca 10% magcup 40 40 Ｃａ １０％ ａｇｃ
ｍ
40 magnetic cup 40 ｕｐ
20
Tem
20
Ｔｅｍ
20 20
0 0 0
0
0 20 40 60 80 0 20 40 60 80 0 20 40 60 80
0 20 40 60 70 80
seconds ｓｅｃｏｎｄｓ
seconds seconds
Contrex Ion value Evian Ion value V Ion value
olvic Pure Water Ion value
2500 800 250 16
700 14
2000 600 200 12
1500 500 150 10
magcup magcup magcup magcup
ppm
8
ppm
ppm
400
ppm
1000 Ca10% magcup Ca10% magcup 100 C m
a10% agcup 6 Ca10% magcup
300
200 4
500 50
100 2
0 0 0 0
0 20 40 60 80 0 20 40 60 80 0 20 40 60 80 0 20 40 60 80
seconds seconds seconds seconds
Contrex 100cc Evian 100cc Volvic 100cc Pure water 100cc
Initial Temperature 19℃ Initial Temperature 20℃ Initial Temperature 20℃ Initial Temperature 20℃
Initial Ion value 1000ppm Initial Ion value magcup Initial Ion value magcup Initial Ion value magcup
264ppm 91ppm 5ppm
Ca10%magcup Ca10% magcup Ca10% magcup
Figure-5 3ppm 234ppm 80ppm
The high concentration Ca waters show highest microwave heating effects while using Mn-Zn-Ca
(Ca10%) ferrite and the high concentration Ca waters also show higher heating effects while using
Mn-Zn ferrite. The higher ion values show higher heating effects. The infrared emission wavelength
from Mn-Zn-Ca ferrite coincides the Ca absorption wavelength between 8μm and 50μm or 100μ
m and synchronizes with this.
Conclusion
The intensity of the far-infrared emission, with a wavelength between 8μm and 50μm or 100μm
from Mn-Zn-Ca ferrites in using microwave oven becomes larger than the blackbody radiation
by the electric dipole transition and magnetic dipole transition of Ca atoms and magnetic resonance.
We can use this method for heating organic materials, amino acids for synthesis or polymerization
or foods which contain Calcium which have an optimal absorption wavelength in the far-infrared
region or terahertz region under the optimal temperatures. This method can apply wide industrial
use.
References
1. Quantum Theory of Solids C. Kittel Wiley
2. Introductory Solid State physics Seventh Edition C.Kittel Wiley
3. The Classical Theory of Field L.D. Landau E.M. Lifshitz Pergamon
4.Infrared Studies of Apatites. Ⅰ. Vibrational Assignments for Calcium, Strontium, and Barium
Hydoxyapatites Utilizing Isotopic Substitution B.O. Fowler Inorganic Chemistry, Vol 13, No1 1974