Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Zinc, manganese silicate gree luminous fluorescent powder and its preparing method

A technology of zinc-manganese silicate and fluorescent powder, applied in luminescent materials, chemical instruments and methods, instruments, etc., can solve the problems of uneven particle size distribution and components of precipitated products, unsuitable for industrialized large-scale production, and expensive raw materials , achieve the effect of cheap production requirements, short afterglow time, lustful purity

Inactive Publication Date: 2007-08-29
YUELONG NEW MATERIAL SHANGHAI
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional precipitation method usually causes uneven particle size distribution and components of the precipitation product due to the uneven local concentration of the precipitation system, while the sol-gel method requires expensive raw materials and complicated processes, which is not suitable for industrialized mass production.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Zinc, manganese silicate gree luminous fluorescent powder and its preparing method
  • Zinc, manganese silicate gree luminous fluorescent powder and its preparing method
  • Zinc, manganese silicate gree luminous fluorescent powder and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1: prepare Zn with the method of the present invention 2-x mn x SiO 4 Phosphor powder (the holding temperature is 700°C, 800°C, 900°C and 1150°C respectively).

[0046] Adopt wet chemistry method of the present invention to prepare Zn 2-x mn x SiO 4 Phosphor,

[0047] ① Prepare a uniformly dispersed suspension containing basic zinc carbonate and silicon dioxide: dissolve a certain stoichiometric amount of zinc nitrate and urea in deionized water, and the molar ratio of urea to zinc nitrate is 4:1. Then add the silicic acid slurry and stir well to form a suspension system containing silicon raw materials. The temperature of the system was raised to 95°C, and the reaction was carried out for 3 hours with rapid stirring, and finally a suspension containing basic zinc carbonate and silicon dioxide was generated. Wash the unreacted Zn present in the suspension system with deionized water 2+ ions and make the system neutral.

[0048] ②Add an appropriate am...

Embodiment 2

[0055] Embodiment 2: prepare Zn with wet chemistry method of the present invention 2-x mn x SiO 4 Phosphor.

[0056] Prepare 8 fluorescent powder samples according to the method of Example 1, wherein the molar ratio of urea to zinc nitrate in step ① is 3:1, then add silicic acid slurry and fully stir to form a suspension system of silicon-containing raw materials. The temperature of the system is raised to 100°C; the insulation condition of step ③ is 1150°C for 4 hours, and the Mn 2+ The mole percentages are 0.005, 0.01, 0.02, 0.03, 0.04, 0.05, 0.08, 0.1, respectively.

[0057] Sample serial number

[0058] Accompanying drawing 5 is according to the method for comparative example 2 and embodiment 2, in the same Mn 2+ The difference in luminance of the prepared phosphors under concentration conditions. It can be found from the figure that the brightness of the samples prepared by the method of the present invention is generally higher than that of the samples pr...

Embodiment 3

[0061] Embodiment 3: prepare Zn with wet chemistry method of the present invention 2-x mn x SiO 4 Phosphor.

[0062] Prepare 8 fluorescent powder samples according to the method of Example 1, wherein the insulation condition of step ③ is 1150 ° C for 6 hours, Mn 2+ The mole percentages are 0.057, 0.07, 0.092, respectively.

[0063] Table 1 shows the values ​​of brightness and afterglow time of phosphors prepared according to the high-temperature solid-phase method and the method of the present invention.

[0064] brightness

[0065] Accompanying drawing 6 is the prepared Zn of high temperature solid phase method and the inventive method 2-x mn x SiO 4 The afterglow time variation curve of phosphor powder. Under the same luminance condition, the sample prepared by the method of the invention has a shorter afterglow time.

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to zinc silicate manganese green emitting fluorescent powder and the manufacture method. It includes the following steps: adding SiO2 or silica slurry into zinc nitrate and urea water solution to make suspension, manganese sulfate solution, dropping excessive ammonia to generate precipitate; keeping temperature of precipitate in air or inert gas and gaining the fluorescent powder after processed. The feature is that the grain size is normally 1um, and has equally manganese ion distribution, and the keeping temperature declines about 200 degree centigrade. The invention has good emitting performance and persistent quality.

Description

technical field [0001] The invention relates to a zinc silicate (zinc manganese silicate) green luminescent fluorescent powder doped with manganese ions suitable for display and a preparation method thereof. Background technique [0002] Manganese-activated zinc silicate is often used as a green light-emitting material in PDP displays because of its high luminous efficiency and high color purity. Long afterglow time is its main disadvantage, generally 20-30 milliseconds, which is based on Mn 2+ The main characteristics of phosphors that are activators. [0003] Usually prepared Zn 2-x mn x SiO 4 Phosphor powder adopts a high-temperature solid-state sintering method, which is simple in process but has many deficiencies. First of all, zinc manganese silicate is excited by the matrix lattice under VUV and transmits energy to the luminescent center, and the radiation penetration depth is very shallow, which requires the phosphor to have a good surface shape, and high temper...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/59G09F13/20
Inventor 何晓华张晓明顾竞涛朱菁
Owner YUELONG NEW MATERIAL SHANGHAI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com