• 대한화학회지
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• 제35권2호
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• pp.179-183
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• 1991

• Bulletin of the Korean Chemical Society
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• 제6권5호
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• pp.320-320
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• 1985

• 한국자기학회:학술대회 개요집
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• 한국자기학회 2007년도 The 1st International Symposium on Advanced Magnetic Materials
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• pp.285.1-285.1
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• 2007

• 대한화학회지
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• 제33권4호
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• pp.436-438
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• 1989

• 한국전기전자재료학회논문지
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• 제11권8호
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• pp.658-663
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• 1998

Ferrite plating enables were grown by ferrite by plating method in solution at low temperature(<10$0^{\circ}C$). This faciltates the fabrication of new ferrite thin film devices using non- heat-resistant materials(plastic, GaAs ect) as substrates. Combining the ferrite plating with sonochemistry, application of power ultrasonic waves to stimulate chemical reactions, the crystallinity and qualities of films were improved. Modifying the reactions cell and plating conditions further improved the film quality.

• Bulletin of the Korean Chemical Society
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• 제34권2호
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• pp.680-682
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• 2013

• 분석과학
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• 제24권2호
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• pp.61-68
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• 2011

알루미나에 니켈을 코팅하는 효율을 높이기 위하여 졸-겔법을 이용하여 비결정성 알루미나를 제조한 후, 음향화학법을 이용하여 니켈을 알루미나에 코팅하여 미립자를 제조하였다. 니켈을 코팅한 알루미나 미립자는 여러 가지 소성온도($500^{\circ}C$, $1,000^{\circ}C$), 니켈용액의 농도(0.01 M~0.2 M), 초음파반응시간 (30 min, 2 h)의 조건에서 제조하였다. 제조한 미분체는 X-Ray Diffractometer (XRD), Scanning Electron Microscope (SEM), Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES), Particle Size Analyzer (PSA)로 특성을 분석하였다. 니켈용액의 농도가 진해짐에 따라 그리고 초음파반응시간이 길수록 니켈의 코팅량이 증가하였다. 알루미나에 니켈을 코팅하는데 있어 $1000^{\circ}C$의 소성온도, 0.1 M의 니켈용액의 농도, 2시간의 초음파에 반응하였을 때 알루미나에 니켈이 가장 많이 코팅되었다. 그리고 평균입자의 크기는 835.9~986.7 nm였다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2009년도 추계학술대회 논문집
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• pp.151-151
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• 2009

A enameled wire may have better corona-resistance when its coating material contains nano-sized inorganic particles. However, industrial applications are still limited because an aggregation between nanofillers may happen during coating processes. In this study we use a novel scheme of surface modification with silane on silica nanoparticles using sonochemical reaction where composition and surface density of silanes can be controlled in order to reduce particle-particle attractive interaction. Functionalized nanoparticles are evenly dispersed in the matrix confirmed by SEM and energy dispersive x-ray analysis. Dielectric strength and thermal resistance of the nanocomposite wires are improved while flexibility of the wire maintains.

• Journal of Magnetics
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• 제15권1호
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• pp.21-24
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• 2010

A new synthetic method for the formation of uniform $\alpha-Fe_2O_3$ nanoparticles was reported and their magnetic properties were investigated. The sonochemical synthesis and the subsequent take-off technique resulted in spherical shaped $\alpha-Fe_2O_3$ nanoparticles with an average diameter of 60 nm. The temperature- and applied magnetic field-dependent magnetization of the $\alpha-Fe_2O_3$ nanoparticles was explained by the sum of two contributions, i.e., the Morin transition and superparamagnetism, because the critical size for superparamagnetism was within the size variation of the nanoparticles.

• 한국대기환경학회지
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• 제19권3호
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• pp.307-314
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• 2003

The sonolytic decomposition of chlorofluorocarbon (CFC 113) and several alternative compounds, such as HCFC 225ca, HCFC 225cb, and HFC 134a, in.aqueous solutions was investigated. The CFC 113 with a high volatility and a low solubility in water was rapidly decomposed with increasing sonication time. The decomposition rates were influenced by the initial concentration of CFC 113, the reaction temperature, and the gas/liquid phase volume ratio but were independant of the pH of solution. The predominant pathway of the decomposition of CFC 113 by sonication was not the oxidation by OH radicals but the pyrolysis with high temperature and pressure inside of the cavitation bubble. The pyrolysis in the cavitation bubble resulted in an almost complete mineralization of CFC 113 with the high efficient formation of inorganic products (Cl$^{[-10]}$ , F$^{[-10]}$ , CO, $CO_2$). The addition of zinc powder on the decomposition of CFC 113 by sonication caused an acceleration of the decomposition. Also, HCFCs and HFC 134a were found to be readily decomposed by the pyrolysis induced from the sonication.