Abstract:
본발명은주성분으로포함되는티탄산바륨계분말; Na를포함하는제1 부성분; Ba를포함하는제2 부성분; 및 Si를포함하는제3 부성분;을포함하고, 상기제1 부성분의함량은주성분 100 mole당 Na 원소기준으로 0.3 내지 4.0 mole 범위에포함되고, Ba/Si 비율은 0.16 내지 1.44를만족하는유전체자기조성물에관한것이다.
Abstract:
PURPOSE: A manufacturing method of a perovskite powder is provided to obtain perovskite powder with excellent dielectric property and electrical performance by manufacturing core-shell structure perovskite powder with a different chemical composition and a matching structure, by using hydrothermal synthesis. CONSTITUTION: A perovskite powder consists of a core portion(1) and shell portion(2). The core portion has a perovskite structure represented by ABO3. The shell portion has a matching structure with the core part, has a different chemical composition from the core portion, and is doped on the core portion. The perovskite atom is doped by one or more selected from aluminum(Al), yttrium(Y), dysprosium(Dy), holmium(Ho), magnesium(Mg), manganese(Mn), vanadium(V), zirconium(Zr) and calcium(Ca). A manufacturing method of the perovskite powder comprises a step of forming a perovskite nuclei; a step of growing the perovskite nuclei in a hydrothermal reactor; a step of preparing a mixture solution by injecting a metal salt aqueous solution into the reactor; and a step of obtaining a perovskite powder by heating the mixture solution.
Abstract:
PURPOSE: A dielectric composition is provided to have an excellent reliability, dielectric property and electrical property by forming a doped layer on the surface in synthesis of perovskite powder using the hydrothermal synthesis method. CONSTITUTION: A dielectric composition comprises a ceramic body including a dielectric layer including peovskite powder(1) with a doped layer(2), on the surface, doped with rare earth resources and at least one material selected from the group consisting of alkaline-earth resources and boron group series; and an internal electrode layer arranged to place the dielectric layer in the interval and to face each other. The dielectric layer includes multiple dielectric grains with a doped layer, on the surface, doped with rare earth resources and at least one material selected from the group consisting of alkaline-earth resources and boron group series.
Abstract:
PURPOSE: A high crystalline dielectric material and a manufacturing device and a method of manufacture thereof are provided to improve the crystallinity of particles. CONSTITUTION: A high crystalline dielectric material has a crystallization axial ratio of 1.003-1.010, a BET non-surface area of 4-80 m^2/g, and a particle size of 15-200 nanometers. The dielectric substance has a perovskite structure marked as ABO3. In the structure of ABO3, A is one or more selected from Mg, Ca, Sr, Pb, Ba and La. B is one or more selected from Ti, Zr and Hf. The manufacturing device of the high crystalline dielectric substance comprises a pair of material feeders(10,20), a mixing tank(30), an autoclave(40) and a cooling pump(50). A manufacturing method of the high crystalline dielectric substance comprises the following steps: dissolving starting raw material A and B in each reactor; manufacturing the nuclei of granules by reacting the starting raw material A and B in the blending tank; and growing the nuclei in a thermostat autoclave. [Reference numerals] (31) Ultrasonic device; (33) High pressure pump; (AA) Filter
Abstract:
본 발명은 바리스터를 내장한 적층형 유전체 필터에 관한 것이다. 본 발명은, 제1 유전체 시트 상에 형성된 금속성 제1 금속성 그라운드 패턴; 상기 금속성 그라운드 패턴 상에 형성되며 ZnO계 조성물로 이루어진 바리스터 패턴; 및 상기 바리스터 패턴 상에 형성된 적어도 하나의 금속성 캐패시터 패턴으로 이루어진 적층형 캐패시터를 포함하는 적층형 유전체 필터를 제공한다. 본 발명에 따르면, 바리스터를 필터에 내장함으로써 전기전자 제품의 경량화, 소형화를 구현할 수 있다. EMI, 노이즈, 적층형, 유전체 필터, 바리스터, ZnO