| Patent application number | Description | Published |
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| 20090105493 | PREPARATION OF IRON (II) ACETATE POWDER FROM A LOW GRADE MAGNETITE - The present invention relates to a preparation of iron(II) acetate powder from low grade magnetite and comprises the following steps: (a) adding organic acid to low grade magnetite powder to obtain iron solution; (b) adding hydroxide to the iron solution to obtain iron hydroxide; and (c) adding acetic acid to the iron hydroxide, thereby obtaining iron(II) acetate. | 04-23-2009 |
| 20090123357 | METHOD FOR MAKING SILICA NANOPARTICLES BY FLAME SPRAY PYROLYSIS ADOPTING TWO-FLUID NOZZLE - The invention relates to a method for making silica nanoparticles using a flame reactor, which includes a droplet spray having a two-fluid nozzle and a burner of a quintuple tube structure. In this method, droplets of silicon alkoxide as liquid Si compound are sprayed through the droplet spray of the flame reactor. A flame is generated by the flow of inert gas, oxygen, hydrogen and air simultaneously into the burner of the flame reactor. The liquid Si compound is delivered through the flame of the burner to produce silica nanoparticles having a mean particle size ranging from 9 nm to 68 nm. Resultant nanoparticles are collected and recovered in a particle collector. The droplets sprayed under high pressure from a silicon alkoxide solution are directly oxidized in the flame, thereby producing spherical silica nanoparticles. | 05-14-2009 |
| 20100048741 | Fabrication Method of CaCO3 Nanoparticles Using Beads Milling - The present invention relates to a method for fabricating calcium carbonate nanoparticles dispersed in water from ground calcium carbonate of micrometer (μm) order using beads milling. More particularly, the present invention relates to a method for fabricating calcium carbonate nanoparticles dispersed in water by which a complex aqueous slurry comprising coarse ground calcium carbonate having an average particle size of several micrometers (μm) and a surfactant is subjected to beads milling, such that grinding and dispersion in water of the ground calcium carbonate occur simultaneously, and the resultant calcium carbonate nanoparticles have an average particle size of 10-100 nm and a unimodal clustering distribution. | 02-25-2010 |
| 20100272628 | Fabrication of Plate-Like Natural Crystalline Graphite with Nano-Scale Thickness - Provided is a method for preparing plate-like ultrafine particles of flaky graphite having an average graphite plate diameter of 3-5 μm and a graphite plate thickness of 20-60 nm, including: grinding natural flaky graphite to control the particle size to 5-15 μm; dipping the ground flaky graphite into an aqueous solution containing an acid and an oxidizing agent, followed by washing and drying, to form a graphite intercalation compound in the ground flaky graphite; carrying out gasification of the graphite intercalation compound via low-temperature heat treatment to expand the flaky graphite to 20-30%; and carrying out wet grinding of the expanded flaky graphite at a slurry concentration of 20-28 wt %. | 10-28-2010 |
| 20100316789 | METHOD OF MODIFYING SILICA NANOPOWDER SURFACES - In accordance with one embodiment, a method of modifying the surface of silica nanopowder by a spray heating process is provided. In the method, surface characteristics of silica nanopowder are modified from hydrophilic to hydrophobic. A colloidal suspension including silica nanopowder and a surface modifier which are dissolved in ethanol is sprayed and thermally dried so that the surface characteristics of silica nanopowder are modified by the surface modifier coated on the surface of silica nanopowder. In the method, silica nanopowder surfaces are modified from hydrophilic to hydrophobic by controlling concentration and type of a surface modifier and heating temperature. | 12-16-2010 |
| 20110281112 | METHOD FOR PRODUCING CERIUM DIOXIDE NANOPOWDER BY FLAME SPRAY PYROLYSIS AND CERIUM DIOXIDE NANOPOWDER PRODUCED BY THE METHOD - Disclosed is a method for producing a cerium dioxide nanopowder by flame spray pyrolysis. The method comprises dissolving a cerium compound in an organic solvent to prepare a precursor solution, atomizing the precursor solution into microdroplets using an ultrasonic atomizer, transferring the microdroplets together with an argon gas as a carrier gas to a central portion of a high-temperature diffusion flame burner, subjecting the microdroplets to pyrolysis and oxidation in the central portion of the diffusion flame burner to produce a cerium dioxide nanopowder, and collecting the cerium dioxide nanopowder using a collector. According to the method, a cerium dioxide nanopowder can be continuously produced on a large scale by flame spray pyrolysis. In addition, the particle size and uniformity of the cerium dioxide nanopowder can be controlled by appropriately selecting the kind of the solvent and the concentration of the raw material. Furthermore, flame spray pyrolysis allows the cerium dioxide to have a fluorite crystal structure. | 11-17-2011 |
| Patent application number | Description | Published |
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| 20110061411 | Linear Compressor - The present invention relates to a linear compressor, and more particularly, to a linear compressor which supplies a necessary cooling capacity through a natural cooling capacity modulation and a forcible cooling capacity modulation, and a cooling system using the same. The linear compressor according to the present invention includes a compression space into which refrigerant is sucked, a movable member which linearly reciprocates to compress the refrigerant sucked into the compression space, one or more springs which are installed to elastically support the movable member in a motion direction of the movable member, a motor unit which includes a motor and a capacitor connected in series to the motor so as to make the movable member linearly reciprocate, and a motor control unit which performs a natural cooling capacity modulation according to a load by reciprocation of the movable member. | 03-17-2011 |
| 20110097224 | LINEAR COMPRESSOR - The present invention relates to a linear compressor, and more particularly to, a linear compressor which employs a conductor member in a linear motor instead of a magnet to produce a driving force by magnetic induction and automatically or naturally modulate a cooling capacity according to a load. The linear compressor of the present invention includes a fixed member provided with a compression space, a movable member which linearly reciprocates inside the fixed member to compress refrigerant, one or more springs installed to elastically support the movable member in a motion direction, a first stator applied with a current to produce a magnetic field, a second stator spaced apart from the first stator at a certain interval, a conductor member electromagnetically induced by the magnetic field produced by the first stator and the second stator to make the movable member linearly reciprocate, and a control unit which controls supply of the current with respect to the first stator. | 04-28-2011 |
| 20110135501 | LINEAR COMPRESSOR - The present invention relates to a linear compressor, and more particularly to, a linear compressor which employs a conductor member in a linear motor instead of a magnet to produce a driving force by magnetic induction and naturally modulate a cooling capacity according to a load. The linear compressor of the present invention includes a fixed member provided with a compression space, a movable member which linearly reciprocates inside the fixed member to compress refrigerant, a plurality of springs installed to elastically support the movable member in a motion direction, a first stator through which a current flows, a conductor member magnetically induced by the first stator to make the movable member linearly reciprocate, and a control unit which controls supply of a current with respect to the first stator. | 06-09-2011 |
| 20110135518 | LINEAR COMPRESSOR - The present invention relates to a linear compressor, and more particularly to, a linear compressor which employs a conductor member in a linear motor instead of a magnet to produce a driving force by electromagnetic induction. The linear compressor of the present invention includes a fixed member provided with a compression space, a movable member which linearly reciprocates inside the fixed member to compress refrigerant, one or more springs installed to elastically support the movable member in a motion direction, a stator composed of a first stator supplied with a current, and a second stator spaced apart from the first stator at a certain interval, a conductor member electromagnetically induced by a magnetic field produced by the stator to make the movable member linearly reciprocate, and a control unit which controls supply of the current with respect to the first stator. | 06-09-2011 |
