摘要:
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.
摘要:
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
摘要:
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
摘要:
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
摘要:
본 발명에서는 기판 재료 또는 기판에 부착되는 테이프 재료를 구성하는 조성물로서, 고내열성의 조성물을 제조하기 위하여 본 발명에서 제안하는 조성비율에 따라 고내열성의 에폭시 수지와 경화제를 조합하며, 더욱 우수한 고내열성을 갖는 조성물을 제조하기 위하여 본 발명에서 제안하는 조성비율에 따라 혼합되는 HGM(Hollow Glass Microsphere)이 함유된 무기 필러로서 제안된다. 또한 이러한 HGM(Hollow Glass Microsphere)의 혼합에 따라 고내열성과 동시에 저유전율 특성을 갖는 복합 소재 조성물을 구현할 수 있다.