Method of producing green fluorescent powder

A green phosphor, phosphor technology, applied in chemical instruments and methods, luminescent materials, discharge tubes, etc., can solve the problems of co-activator chloroauric acid, poor luminescence performance of phosphor fired products, poor luminescence performance, etc. , to achieve the effect of improving the luminous performance

Inactive Publication Date: 2008-02-27
CAIHONG GRP ELECTRONICS CO LTD
View PDF0 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the co-solvent system used in the existing firing materials is bromide or iodide and NH 4 I. There are 4 to 5 kinds of co-solvent materials, so there are many co-solvent materials used. After the phosphor powder fired material is fired with this co-solvent system, the particle size distribution of the phosphor powder fired product is very wide, that is, phosphor powder The size of the particles is particularly large. After the phosphor powder has been subjected to the necessary water treatment, the qualified phosphor particles harvested are less, resulting in a very low yield of phosphor powder. Low; in addition, because the existing co-activator Al uses aluminum nitrate, the luminescence performance of the phosphor fired product is poor, showing low brightness

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Embodiment 1: at first matrix material zinc sulfide and activator copper nitrate, co-activator aluminum fluoride, chloroauric acid, cosolvent barium iodide and sulfur are mixed uniformly in the mixing machine to make fluorescent powder firing material, wherein The quoted amount of activator copper nitrate is 0.0567% of the mass of zinc sulfide, the quoted amount of co-activator aluminum fluoride is 0.07% of the mass of zinc sulfide, the quoted amount of co-solvent barium iodide is 0.09% of the mass of zinc sulfide, and the quoted amount of sulfur is 0.09% of the mass of zinc sulfide. 2.0% of the mass of zinc; then the phosphor fired material is placed in a quartz container containing 8% of the mass of zinc sulfide sulfur and 15% of the active carbon of the mass of zinc sulfide in a quartz container with a flow rate of 5.0 m 3 / h protective atmosphere N 2 It is fired at 960°C in a tunnel-type electric furnace; finally, the fired phosphor powder is removed under an ultra...

Embodiment 2

[0009] Embodiment 2: at first matrix material zinc sulfide and activator copper nitrate, co-activator aluminum fluoride, chloroauric acid, cosolvent barium iodide and sulfur are mixed uniformly in the mixing machine to make fluorescent powder firing material, wherein The quoted amount of activator copper nitrate is 0.0718% of the mass of zinc sulfide, the quoted amount of co-activator aluminum fluoride is 0.15% of the mass of zinc sulfide, the quoted amount of chloroauric acid is 0.00627% of the mass of zinc sulfide, and the quoted amount of co-solvent barium iodide It is 0.2% of the quality of zinc sulfide, and the amount of sulfur cited is 3.5% of the quality of zinc sulfide; % Activated carbon in a quartz container, placed at a flow rate of 7.0m 3 / h protective atmosphere N 2 It is fired at 980°C in a tunnel-type electric furnace; finally, the fired phosphor powder is removed under an ultraviolet lamp to remove non-luminescent or abnormally luminescent powder and impuritie...

Embodiment 3

[0010] Embodiment 3: first matrix material zinc sulfide and activator copper nitrate, co-activator aluminum fluoride, chloroauric acid, cosolvent barium iodide and sulfur are mixed uniformly in the mixer to make phosphor powder firing material, wherein The quoted amount of activator copper nitrate is 0.0378% of the mass of zinc sulfide, the quoted amount of co-activator aluminum fluoride is 0.04% of the mass of zinc sulfide, the quoted amount of chloroauric acid is 0.0209% of the mass of zinc sulfide, and the quoted amount of co-solvent barium iodide It is 0.18% of the quality of zinc sulfide, and the amount of sulfur cited is 1.0% of the quality of zinc sulfide; % Activated carbon in a quartz container, placed at a flow rate of 3.0m 3 / h protective atmosphere N 2 It is fired at 970°C in a tunnel-type electric furnace; finally, the fired phosphor powder is removed under an ultraviolet lamp to remove non-luminescent or abnormally luminous powder and impurities to obtain green ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a making method of green fluorescent powder, which comprises the following steps: mixing zinc blend as host material, cupric nitrate as activating agent, aluminum fluoride as coactivator, chlorauric acid, barium iodide as auxiliary solvent and sulfur in the blending machine to produce phosphor powder burning material; putting the phosphor powder firing material into the quartz container with the sulfur and active carbon to burn in the tunnel with protecting gas of N2; removing non-luminous or luminous abnormal powder and impurity from the phosphor powder under ultraviolet lamp to obtain the green emitting phosphor. The invention uses a fluxing agent material of the barium iodide and a new coactivator material of the aluminum fluoride, which improves luminous property of the phosphor powder with reducing particle size distribution and reduces usage of the coactivator of chlorauric acid at the same time.

Description

technical field [0001] The invention relates to a method for preparing a green fluorescent powder for a cathode ray tube, in particular to a method for preparing a fired product of the green fluorescent powder for a cathode ray tube. Background technique [0002] Green fluorescent powder for cathode ray tubes, the preparation method of the fired product is as follows: matrix material zinc sulfide, activator copper nitrate, co-activator aluminum nitrate, co-activator chloroauric acid, co-solvent system (strontium bromide, bismuth iodide, potassium iodide , ammonium iodide, antimony iodide), sulfur, and ammonium bicarbonate are weighed according to the requirements of the manufacturing process and mixed evenly in the mixer, and then the prepared phosphor powder is fired into a quartz container with sulfur and activated carbon. Inside, placed in a protective atmosphere N 2 Burn in a tunnel-type electric furnace at 950-990°C, and finally remove the non-luminescent or abnormally...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C09K11/56H01J29/20
Inventor 李伟黄益鸣蔡步军苟宝峰
Owner CAIHONG GRP ELECTRONICS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap