Abstract:
본 발명은 N-메틸-2-피롤리돈(N-methyl-2-Pyrrolidone)의 제조방법에 관한 것으로서, 촉매 존재하에서 피롤리돈(2-pyrrolidone)과 메탄올(methanol)을 기상반응시킴으로서 다양한 용도로 사용되고 있는 N-메틸-2-피롤리돈을 생산단가를 낮추면서도 높은 수율로 제조할 수 있도록 한 N-메틸-2-피롤리돈의 제조방법을 제공한다.
Abstract:
A white light emitting device is provided to acquire excellent luminance by using a TbAG:Ce compositional fluorescent substance containing Si or Fe. A white light emitting device includes at least one LED(Light Emitting Diode) capable of emitting light within a wavelength range of 430 to 470 nm and a fluorescent substance of TbAG:Ce composition. The fluorescent substance is represented by a chemical formula of (Tb1-xCex)3(Al1-yFey)5O12, wherein the x is in a first range of 0.01 to 0.4 and the y is in a second range of 0.0 to 0.1. At this time, the value of the y is capable of being selected in a third range of 0.01 to 0.04.
Abstract:
PURPOSE: A method and a device for measuring the thickness of a thin film layer using X-rays are provided to simply and easily measure the thickness of the thin film layer for measuring the object with a thin layer formed on a substrate or a base layer. CONSTITUTION: A device for measuring the thickness of a thin film layer using X-rays comprises an X-ray generating unit, a detecting device, and a control unit. The X-ray generating unit irradiates X-rays to a reference specimen, or a base layer of a target specimen, or the thin film layer. The detecting device detects the strength of the signals being emitted from the reference specimen or the target specimen. The control unit determines a calibration curve by comparing the strength difference of the signals emitted by a specific component included in the base layer of the reference specimen and the thickness of the thin film layer of the target specimen by comparing the strength difference of the signals emitted by the specific component included in the reference specimen and target specimen with the base layer where the thin film layer is formed with the calibration curve. [Reference numerals] (AA) X-ray generating unit; (BB) Si, Ca or Ag X-ray detecting device; (CC) Checking the size of a Si or Ag signal through control of coating parameters
Abstract:
본 발명은 디-(4-비닐피리딘) 금속 프탈로시아닌 화합물, 이것을 포함하는 조성물 및 이것의 제조방법에 대한 것으로, 특히 금속(metal)을 가지는 프탈로시아닌(Phthalocyanine)에 리간드로써 4-비닐피리딘이 포함되어 우수한 표면저항과 함께 뛰어난 자외선 차단 효과를 가지며, 이것은 종래와 같이 유기용제에 용해되어 제조되는 것이 아니라 분말상을 질소 충진함으로써 제조되는 것을 특징으로 한다. 프탈로시아닌, 비닐피리딘, 필름
Abstract:
PURPOSE: A di-(1-vinylimidazole) metal phathalocyanine compound is provided to ensure excellent effects of surface resistance and UV protection. CONSTITUTION: A di-(1-vinylimidazole) metal phathalocyanine compound has a structure of chemical formula 2. A composition for anti-static or UV absorption contains the di-(1-vinylimidazole) metal phathalocyanine compound. A method for preparing the di-(1-vinylimidazole) metal phathalocyanine compound comprises: a step of filling mixture powder of metal phthalocyanine and 1-vinylimidazole with nitrogen; and a step of washing reactant and purifying.