Korea Institute of Science and Technology

Alcom

Senus Corp.

Jae-Pyoung Ahn

Seung-Cheol Lee

So-Hyung Lee

Jae-Kap Lee

Wook-Seong Lee

Kon-Bae Lee

Hae Sung Kim

Hoon Mo Park

Seung-Yong Lee

Hae-Weon Lee

Kyoungja Woo

Jong-Ku Park

Jeon-Kook Lee

Hyoung-Chul Kim

HyunJoo Choi

Hyun-Seock Jie

The present invention relates to a method of manufacturing aluminum nitride and aluminum nitride prepared by the same. Pure aluminum powder having a median particle size (D50) of 1.52 &#x3bc;m was heated to a temperature in a range of 595&#xb0; C.&#x2dc;900&#xb0; C. in a nitrogen containing atmosphere comprising nitrogen and argon gases, at atmospheric pressure for one hour to obtain aluminum nitride with a degree of nitridation exceeding 93%. According to the present invention aluminum nitride may be produced with high yield using a simple and inexpensive one-step heating method in a relatively short period of time.

Manufacturing method of aluminium nitride and aluminum nitride prepared by the same

The present invention is related to a method of fabricating an aluminum matrix composite by a simple process of heating a mixture of a ceramic reinforcing phase and aluminum in nitrogen containing atmosphere and an aluminum matrix composite fabricated by the same. The aluminum matrix composite may be fabricated by heating to temperatures even lower than the melting temperature of aluminum as well as to temperatures higher. The exothermic nitridation reaction contributes to the melting of the aluminum matrix and the aluminum nitride formed in-situ as a result may act as an additional reinforcing phase.

Method of fabricating an aluminum matrix composite and an aluminum matrix composite fabricated by the same

Disclosed is AA' graphite with a new stacking feature of graphene, and a fabrication method thereof. Graphene is stacked in the sequence of AA&#x2032; where alternate graphene layers exhibiting the AA&#x2032; stacking are translated by a half hexagon (1.23 &#x212b;). AA&#x2032; graphite has an interplanar spacing of about 3.44 &#x212b; larger than that of the conventional AB stacked graphite (3.35 &#x212b;) that has been known as the only crystal of pure graphite. This may allow the AA&#x2032; stacked graphite to have unique physical and chemical characteristics.

AA' stacked graphite

AA' stacked graphite and fabrication method thereof

There is provided a fabrication method for an AA stacked graphene-diamond hybrid material by converting, through a high temperature treatment on diamond, a diamond surface into graphene. According to the present invention, if various types of diamond are maintained at a certain temperature having a stable graphene phase (approximately greater than 1200&#xb0; C.) in a hydrogen gas atmosphere, two diamond {111} lattice planes are converted into one graphene plate (2:1 conversion), whereby the diamond surface is converted into graphene in a certain thickness, thus to fabricate the AA stacked graphene-diamond hybrid material.

AA stacked graphene-diamond hybrid material by high temperature treatment of diamond and the fabrication method thereof

The present invention relates to a combustion reactor for nanopowders, a synthesis apparatus for nanopowders using the combustion reactor, and a method of controlling the synthesis apparatus. The combustion reactor for nanopowders comprises an oxidized gas supply nozzle connected to an oxidized gas tube; a gas supply unit supplying a fuel gas and a precursor gas; and a reaction nozzle forming concentricity on an inner wall of the oxidized gas supply nozzle to be connected to the gas supply unit and having an inlet opening for supplying an oxidized gas disposed at a region adjacent to a jet orifice for spraying flames. In the present invention, it is possible to precisely control the stability of flames, the uniform temperature distribution of flames and the temperature of flames that affect the properties of nanopowders, and the deposition of oxide in the combustion reactor is prevented to thus enable a continuous and uniform reaction for a long time, thereby enabling an economic and efficient synthesis of nanopowders.

Combustion reactors for nanopowders, synthesis apparatus for nanopowders with the combustion reactors, and method of controlling the synthesis apparatus

In a metal oxide nanoparticle and a synthetic method thereof, and in particular to maghemite (&#x3b3;-FeO) nanoparticles usable as a superhigh density magnetic recording substance by having good shape anisotropy and magnetic characteristics, hematite (&#x3b1;-FeO) nanoparticles usable as a precursor to the maghemite or a catalyst, maghemite and hematite-mixed nanoparticles and a synthetic method thereof, the method for synthesizing metal oxide nanoparticles includes forming a reverse micelle solution by adding distilled water, a surfactant and a solvent to metallic salt not less than trivalent, precipitating and separating gel type amorphous metal oxide particles by adding proton scavenger to the reverse micelle solution; adjusting a molar ratio of metal oxide to the surfactant by washing the gel type amorphous metal oxide particles with a polar solvent; and crystallizing metal oxide nanoparticles through heating or reflux after dispersing the gel type amorphous metal oxide particles in a non-polar solvent having a high boiling point.

Shape anisotropic metal oxide nanoparticles and synthetic method thereof

Growing community of inventors

Seoul, South Korea

Jae-Pyoung Ahn