Abstract:
저가원료를 사용하면서도 내열성 및 소수성이 우수한 소수성 열전도성 코팅막 및 그의 제조방법이 제안된다. 본 발명의 일측면에 따른 소수성 열전도성 코팅막은 열전도성 필러 및 열전도성 필러의 부착력을 향상시키는 부착제를 포함하는 열전도층 및 열전도층의 일면에 형성된 소수성층을 포함한다.
Abstract:
그래핀 복합필름 제조방법이 개시된다. 본 발명의 일 실시예에 따른 그래핀 복합필름 제조방법은 기판 상부에 카본 소스를 포함하는 고분자층을 코팅하는 제1 단계; 및 마이크로파 조사 및 IPL(Intensed Pulse Light) 조사 중 적어도 1 이상의 열원을통해, 상기 고분자층을 가열하여 제1 그래핀층을 형성하는 제2 단계를 포함한다.
Abstract:
The present invention relates to a method for manufacturing a thermoelectric nanocomposite and, more specifically, to a method for manufacturing a thermoelectric nanocomposite which comprises the steps of: preparing a solution in which a bulk material is dispersed in a polymer matrix; and generating a nanostructure from the bulk material dispersed solution. According to the present invention, the thermoelectric nanocomposite having high thermoelectric effect and electrical conductivity can be formed by a simple process.
Abstract:
PURPOSE: A compensation circuit of a switch driver is provided to improve linear distortion of output power. CONSTITUTION: A dead zone sensor (120) generates sensing signals which sense a dead zone section according to the logical combination operation of a first and a second input signal having the same logical voltage level. A clock generator (130) generates a plurality of clock signals according to the logical combination operation of one signal among the sensing signals and the first and the second input signal having the same voltage level. An output power compensator (140) includes a plurality of switches switched by receiving the plurality of clock signals. The output power compensator compensates linear distortion generated in an ascending section of output power by forming a first path supplying a positive reference voltage source to an output end according to the switching operation of each switch. The output power compensator compensates the linear distortion generated in a descending section of the output power by forming a second path sinking the output power on the output end to a negative reference voltage source side. [Reference numerals] (120) Dead zone sensor; (130) Clock generator; (140) Output power compensator; (150) Filter; (50) Switching driver
Abstract:
PURPOSE: A surface treating method of ceramic particles is provided to improve the solvent wettability and dispersibility of ceramic particles by treating the surfaces of the ceramic particles with an ionic polymer. CONSTITUTION: The surface property of ceramic particles, of which surfaces are treated with an ionic polymer, is possibly controlled. The ionic polymer is an anionic polymer and is one of poly (acrylic acid), poly (sodium 4-styrene sulfonate), poly (vinyl sulfonic acid), poly (sodium salt), and poly (amino acid). The ionic polymer is a cationic polymer and is one of poly (diallydimethylammonium chloride), poly (allylamine hydrochloride), poly (4-vinyl benzyl trimethyl ammonium chloride), and poly (ethylene imine). A surface treating method of ceramic particles includes the steps of: adjusting the pH of a solution containing ceramic particles using a predetermined solution; and controlling the surface property of the ceramic particles using an ionic polymer. [Reference numerals] (AA) Fe precursor
Abstract:
본 발명은 우수한 압전 상수 및 전기기계결합계수를 가지고 높은 큐리에 온도를 가지며, 저온 소결이 가능한 압전 조성물과 그 제조 방법 및 이를 이용한 압전 소자에 관한 것으로서, 본 발명의 압전 조성물은 (1-xy)Pb(Zr 1 - z Ti z )O 3 -xPb(Ni 1/3 Nb 2/3 )O 3 -yPb(Zn 1/3 Nb 2/3 )O 3 [(1-xy)PZ 1 - z T z -xPNN-yPZN]의 화학식으로 표시되고, x+y는 0.3≤x+y≤0.55, z는 0.50≤z≤0.65이다. 이와 같은 압전 조성물의 제조 방법은, (a) 순도 99%이상의 PbO, ZrO 2 , TiO 2 , NiO, ZnO, Nb 2 O 5 파우더를 조성에 맞게 평량하는 단계와, (b) 상기 (a) 단계에서 평량된 양의 w mol% (0