Abstract:
The present invention relates to a method for manufacturing high-dispersible metal nanoparticle ink for printed electronics which comprises: a first step which manufactures metal nanoparticles dispersed in liquid by electrically exploding metal wires in liquid using pulse power inside a chamber in which liquid is filled; a second step which forms metal nanopowder by collecting and drying the metal nanopowder dispersed in the liquid formed in the first step; and a third step which forms a conductive slurry composition by mixing the metal nanopowder formed in the second step with a binder. According to the above steps, the metal nanoparticles are manufactured using the electric explosion method and the metal nanopowder ink is manufactured without adding a dispersing agent, thereby the metal nanopowder ink with uniform particle size and enhanced dispersibility is manufactured.
Abstract:
PURPOSE: A method and apparatus for easily manufacturing semiconductor nanopowder by wire explosion in liquid are provided to manufacture semiconductor nanopowder of nano size by wire explosion of a semiconductor member. CONSTITUTION: A method for manufacturing semiconductor nanopowder by wire explosion in liquid comprises: a step of preparing a semiconductor member(30) between a pair of electrodes in a chamber; a step of supplying electric energy between a pair of electrodes; and a step of performing wire explosion of the semiconductor member in liquid by supplied electric energy. An apparatus for manufacturing semiconductor nanopowder by wire explosion in liquid comprises: a pair of chamber(10) which contains liquid thereinside; a pair of electrodes(20) which is dipped in liquid inside the chamber; and a power supply for providing electric energy of high voltage.
Abstract:
PURPOSE: A pressure control trigger spark gap switch is provided to eliminate the possibility of switch failure which results in trigger failure due to the consumption of trigger electrodes by introducing a pressure control trigger method. CONSTITUTION: A vacuum container(10) comprises two electrodes(15) connected to a discharge unit and a capacitor. A vacuum pump(30) is connected to the vacuum container. The pressure inside the vacuum container is regulated by the vacuum pump. A compressor(20) is connected to the vacuum container. The pressure inside the vacuum container is regulated by a compressor and a vacuum pump. A manometer(40) measures the pressure inside the vacuum container. Compressed gas for increasing the pressure inside the vacuum container comprises nitrogen gas.
Abstract:
본 발명은 액중 전기폭발에 의한 나노분말 제조 방법 및 장치에 관한 것으로서, 더욱 상세하게는 전기폭발은 그 원리상 기중에서와 액(液)중에서 별반 다르지 않는 점에 착안하여, 펄스파워의 특징으로서 약간의 전도성을 가진 액체라 할지라도 기중에서와 똑같은 원리로 전기폭발을 발생시켜 금속 와이어를 액중에서 기화시킬 수 있고, 기화된 증기의 부피팽창으로 만들어진 공간내에서 금속 와이어의 나노분말이 생성되도록 한 액중 전기폭발에 의한 나노분말 제조 방법 및 장치를 제공하는데 그 목적이 있다. 이러한 목적 달성에 의하여 본 발명은 나노분말이 액체속으로 자연스럽게 분산되어 분말끼리 응집되는 현상이 전혀 발생되지 않고, 액중에서 산소와 접촉되지 않기 때문에 나노분말의 표면산화가 발생되지 않으며, 또한 제조 공정수 감소와 함께 나노분말의 사이즈별 분급이 가능해져 나노분말의 효과적인 응용 및 경제적인 파급 효과를 크게 얻을 수 있는 장점을 제공할 수 있다. 액중 나노분말 제조 방법, 전기적 폭발, 챔버, 금속와이어, 펄스파워
Abstract:
PURPOSE: A cutless RAG(rotary arc gap) switch is provided to increase the lifetime of a switch by inserting a high resistance material to cut area of electrode instead of an air gap in an ordinary switch, and adapting double triggers per one electrode. CONSTITUTION: A cutless RAG switch comprises a circular type upper electrode(1), a circular type lower electrode(2) connected to a load as placing apart from the upper electrode, a first resistor(3) having high resistance and inserted to a certain part of the lower electrode, a first trigger(4) placed on the lower electrode with certain angle against the first resistor, a second resistor(3) having high resistance and inserted to the upper electrode as facing the first resistor, and a second trigger placed on the lower electrode as facing the first trigger. If an arc(5) is generated on both triggers, the arc current is distributed through them. If the arc is generated on one electrode, the number of arc generation comes to be a half in average than one trigger system so the life of switch is prolonged.
Abstract:
PURPOSE: A Small-sized and highly effective high voltage pulse generator is provided by using a long-lived semiconductor switching element. CONSTITUTION: The capacitance of ceramic capacitor decreases when more than the rated voltage is applied. The capacitance decrease is similar to the switch opening operation and non-linear capacitor is proper for the pulse generation based on inductive storage system. The capacitor (C2) is connected between diode (D1) anode and the other side output terminal of the rectification circuit (Diode D1, resistance R1, and capacitor C1). One terminal of the second inductor (L2) is connected to the diode anode and the both side terminals of the non-linear capacitor (C3) connected to the other terminal of the second inductor and the other output terminal of the rectification circuit are connected to load in a row and generates a highly effective pulse.