Other

Ceracomp Co., Ltd.

Epel Co., Ltd

Moon Chan Kim

Dong Ho Kim

In Hyuk Son

Byeong Woo Kim

Ho Yong Lee

Won Sun Baick

Provided is a piezoelectric single crystal, a method of manufacturing the piezoelectric single crystal, and piezoelectric and dielectric application components using the piezoelectric single crystal. The piezoelectric single crystal shows that characteristics of the piezoelectric single crystal are maximized through the control of composition concerning ions located at [A] from a perovskite type crystal structure ([A][B]O), the single crystal of uniform composition can be provided without a composition gradient even in case of complex, chemical composition thanks to a solid phase single crystal growth method, and in particular, the piezoelectric single crystal is provided in a form which causes large resistance to a mechanical impact, and facilitates mechanical processing, so the piezoelectric single crystal can usefully be applied to the piezoelectric application component and the dielectric application component, like ultrasonic transducers, piezoelectric actuators, piezoelectric sensor, dielectric capacitors, using the piezoelectric single crystal pertain.

Piezoelectric single crystal, fabrication method therefor, and piezoelectric and dielectric application parts using same

Disclosed herein are a novel catalyst for recovering good-quality light oil from materials such as woody hydrocarbons, woody plastics and waste oils, and a preparation method thereof. The catalyst has a three-dimensional network structure and a cubic crystal structure sharing oxygen atoms, and has a Si/Al ratio greater than 1, and includes an alkali metal, an alkaline earth metal and a water molecule of crystallization. The catalyst enables good-quality light oil to be recovered from waste plastics, woody hydrocarbons and waste oils and is highly advantageous in terms of environmental problems.

Catalyst for recovering light oil and preparation method thereof

Disclosed is a process for preparing a stable PROX reaction catalyst, comprising the steps of (a) preparing a catalyst platinum supported on alumina; (b) calcinating the catalyst from step (a) at 300&#x2dc;600&#xb0; C. for 2&#x2dc;4 hours; (c) contacting the catalyst obtained from step (b) with hydrogen at 300&#xb0; C.&#x2dc;600&#xb0; C. for 2&#x2dc;4 hours to reduce the catalyst; and (d) dropping the temperature in the reduced catalyst from step (c) to less than 100&#xb0; C. and then contacting the catalyst with a predetermined solvent and/or gas while elevating the temperature to 300&#xb0; C.&#x2013;600&#xb0; C. The catalyst has Pt&#x2014;Al arrangement, the content of Pt being 0.5&#x2dc;7% by weight and has an overall shape of an oval.

Preferential oxidation catalyst and process for preparing the same

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Seoul, South Korea

Moon Chan Kim