Magnetic ceramic 2008 gcmea


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

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Magnetic ceramic 2008 gcmea

  1. 1. The methods of increasing energy efficiency by irradiation of electromagneticwave in high intensity which agrees the absorption wavelength of materialsKazuhito Kono, Buhei Kono Shozen E-mail address absorption wavelength of organic materials is between 2.3μm~20μm.This is alreadyknown. The absorption wavelength of organic material of food which contains Ca is 8μm~50μm, but it can extend the range to 100μm. A lot of organic materials which have amino acids haveabsorption wavelength at Terahertz range. The optimal temperature of heating organic materials isbelow 200℃.The intensity of blackbody radiation at 200℃ and wavelength between 2.3μm~100μm is small and so heating effects of molecular vibrations were regarded as small. At pastconference of Japan society of electromagnetic wave energy Application, we addressed the energyefficiency of ceramic which was sintered Mn-Zn ferrite. When we irradiated microwaves to thisceramic, the microwaves were transformed to infrared waves, peak wavelength 2.5μm~20μmby eddy current loss, inductive heating and magnetic resonance. The intensity of this was amplifiedmore intensity than blackbody radiation. We sinter Mn-Zn-Ca ferrite inside this ceramic. When weirradiate microwaves to this ceramic, microwaves are transformed to infrared waves at the peakwavelength 8μm~50 μm and the range can be 100μm which are optimal absorptionwavelength of Ca. This is caused by electric dipole transition of microwave field and magneticdipole 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 bysynchronization of absorption wavelength.Keywords Mn-Zn ferrite Mn-Zn-Ca ferrite magnetic resonance far-infrared waves TerahertzIntroductionWe sinter Mn-Zn ferrite totally which has a Curie point 210℃ inside the ceramic. When we heatthis ceramic in the microwave oven, the temperature of Mn-Zn ferrite rises until near 200℃, themicrowaves 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 arefollowing 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 field2. Heating by eddy current loss W= BdH (2) W ; energy by hysterisis, B ;the magnetic flux density, H ; magnetic field,
  2. 2. 3. Heating by magnetic resonance E=2πγnMgμBtw (3)E; energy by electron spin resonance,γ; gyromagnetic constant, n ;number of atoms of magneticmaterial, M ; magnetization, g; g constant, μ B ; Bohr magnetic constant, t; relaxation time ofspin, 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 transitionsof spins of the magnetic materials and infrared and far-infrared waves with a wavelength between2.3μm 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⊿ωP;the energy of radiation,μ;magnetic moment, Brf;magnetic field, h;planck constant,⊿ω;transitfrequency,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 isshown in Figure-1. The temperature of the magnetic materials which are Mn-Zn ferrite is near200℃.But the infrared waves emission by wavelength transformation of the magnetic resonance arenear 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 microwavePower (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-1When we irradiate microwaves to Mn-Zn-Ca ferrite, the energy radiated by electric dipole transitionof Ca is shown in following equation. 4ω4 2 (5) P= d 3c3P;the energy of radiation, ω; frequency of radiation, c; speed of light, d; electric dipolemomentum,The radiated energy by the magnetic dipole transition of Ca by magnetic field is shown in followingequation. 4ω4 P= m2 (6) 3c3
  3. 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 0.62mgFigure-4
  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 80ppmThe 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 usingMn-Zn ferrite. The higher ion values show higher heating effects. The infrared emission wavelengthfrom Mn-Zn-Ca ferrite coincides the Ca absorption wavelength between 8μm and 50μm or 100μm and synchronizes with this.ConclusionThe intensity of the far-infrared emission, with a wavelength between 8μm and 50μm or 100μmfrom Mn-Zn-Ca ferrites in using microwave oven becomes larger than the blackbody radiationby 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 polymerizationor foods which contain Calcium which have an optimal absorption wavelength in the far-infraredregion or terahertz region under the optimal temperatures. This method can apply wide industrialuse.References1. Quantum Theory of Solids C. Kittel Wiley2. Introductory Solid State physics Seventh Edition C.Kittel Wiley3. The Classical Theory of Field L.D. Landau E.M. Lifshitz Pergamon4.Infrared Studies of Apatites. Ⅰ. Vibrational Assignments for Calcium, Strontium, and BariumHydoxyapatites Utilizing Isotopic Substitution B.O. Fowler Inorganic Chemistry, Vol 13, No1 1974