Abstract: Disclosed is a manufacturing method of 1,2-dichlorohexafluorocyclopentene. The first reaction uses dicyclopentadiene as a starting material and nitrogen gas or another inert gas as a diluting agent in a gas-phase thermal cracking reaction to obtain cyclopentadiene. The second reaction uses cyclopentadiene as a starting material in a liquid phase chlorination reaction with chlorine gas to obtain 1,2,3,4-tetrachlorocyclopentane. The third reaction uses 1,2,3,4-tetrachlorocyclopentane as a starting material in a gas-phase chlorination and fluorination reaction with hydrogen fluoride and chlorine gas in the presence of a chromium-based catalyst to obtain 1,2-dichlorohexafluorocyclopentene. The method uses easily acquired starting material and a stable fluorination catalyst, provides a high yield for a target product, and is applicable for large-scale continuous gas-phase production of 1,2-dichlorohexafluorocyclopentene.

Abstract: Disclosed is a manufacturing method of 1,2-dichlorohexafluorocyclopentene. The first reaction uses dicyclopentadiene as a starting material and nitrogen gas or another inert gas as a diluting agent in a gas-phase thermal cracking reaction to obtain cyclopentadiene. The second reaction uses cyclopentadiene as a starting material in a liquid phase chlorination reaction with chlorine gas to obtain 1,2,3,4-tetrachlorocyclopentane. The third reaction uses 1,2,3,4-tetrachlorocyclopentane as a starting material in a gas-phase chlorination and fluorination reaction with hydrogen fluoride and chlorine gas in the presence of a chromium-based catalyst to obtain 1,2-dichlorohexafluorocyclopentene. The method uses easily acquired starting material and a stable fluorination catalyst, provides a high yield for a target product, and is applicable for large-scale continuous gas-phase production of 1,2-dichlorohexafluorocyclopentene.

Abstract: A nitrogen compound luminescent material belongs to the field of LED inorganic luminescent materials. The nitrogen compound luminescent material has a chemical formula: M1-yEuyAlSiCxN3-4/3x. In the formula, M represents one or several of Li, Mg, Ca, Sr and Ba; 0<x?0.2, 0<y?0.5; and C represents the element Carbon. The luminescent material can be excited by ultraviolet, near ultraviolet or blue excitation light source such as LED, and emits red light with wavelength between 500-800nm, especially the maximum emission wavelength between 600-700 nm, exhibiting a wider excitation spectrum range, efficiency and stability. The corresponding method of the preparation is simple, easy to mass production and pollution-free. By using the luminescence material, and with ultraviolet, near ultraviolet or blue LED and other luminescent materials such as green fluorescent powder, a white LED light source can be provided.

Abstract: A nitrogen compound luminescent material belongs to the field of LED inorganic luminescent materials. The nitrogen compound luminescent material has a chemical formula: M1-yEuyAlSiCxN3-4/3x. In the formula, M represents one or several of Li, Mg, Ca, Sr and Ba; 0<x?0.2, 0<y?0.5; and C represents the element Carbon. The luminescent material can be excited by ultraviolet, near ultraviolet or blue excitation light source such as LED, and emits red light with wavelength between 500-800 nm, especially the maximum emission wavelength between 600-700 nm, exhibiting a wider excitation spectrum range, efficiency and stability. The corresponding method of the preparation is simple, easy to mass production and pollution-free. By using the luminescence material, and with ultraviolet, near ultraviolet or blue LED and other luminescent materials such as green fluorescent powder, a white LED light source can be provided.

Abstract: A nitrogen oxide luminescence material, with chemical formula: M1?yX4?xZ1+xOxN7?xx: Ry, in which M represents one or several alkali, alkaline earth, rare earth and transition metals. X represents Si with one or several of Si, Ge, B and Al. Z represents Al with one or several of Al, Ga, In. R represents one or several of luminescence center elements Eu, Ce, Tb, Yb, Sm, Pr and Dy. In the formula, 0?x<0.5, 0<y<1.0. The luminescence material can be excited by ultraviolett, near ultraviolet or blue light, and emits yellow or red light with wavelength between 500-750 nm. With the ultraviolet, near ultraviolet or blue lights, and other types of luminescence materials, such as green fluorescent powder, a new white LED can be obtained. The luminescence material has a wider excitation spectrum range, and is efficient and stable. Preparation is simple, easy to mass-produce and pollution-free.

Abstract: The present invention relates to semiconductor field, especially relates to an oxynitride luminescent material, preparation method and its application. The oxynitride has a chemical formula of AxByOzN2/3x+4/3y?2/3z:R, wherein A is one or more elements selected from the group consisting of Be, Mg, Ca, Sr, Ba, and Zn; B is one or more elements selected from the group consisting of Si, Ge, Zr, Ti, B, Al, Ga, In, Li, and Na, and at least contains Si. The oxynitride luminescent material according to the invention is excellent in chemical stability and luminescence property, and act as cyan to red luminescent material applicable to white light LED that excited by ultraviolet or blue light LED. Its excited wavelength is between 300-500 nm, while the emission wavelength at 470-700 nm. With blue or ultraviolet or near-ultraviolet LED, this type of material can be used to produce white light illumination or display light source.

Abstract: The present invention relates to semiconductor field, especially relates to an oxynitride luminescent material, preparation method and its application. The oxynitride has a chemical formula of AxByOzN2/3x+4/3y?2/3z:R, wherein A is one or more elements selected from the group consisting of Be, Mg, Ca, Sr, Ba, and Zn; B is one or more elements selected from the group consisting of Si, Ge, Zr, Ti, B, Al, Ga, In, Li, and Na, and at least contains Si. The oxynitride luminescent material according to the invention is excellent in chemical stability and luminescence property, and act as cyan to red luminescent material applicable to white light LED that excited by ultraviolet or blue light LED. Its excited wavelength is between 300-500 nm, while the emission wavelength at 470-700 nm. With blue or ultraviolet or near-ultraviolet LED, this type of material can be used to produce white light illumination or display light source.