Unlock instant, AI-driven research and patent intelligence for your innovation.

Yellow fluorescent powder as well as preparation method and use method thereof

A technology of yellow phosphor powder and light-emitting device, applied in the field of yellow phosphor powder and its preparation, can solve the problems of low luminous efficiency of nano-phosphor powder, complicated process of nano-phosphor powder and high cost, and achieves reduction of synthesis cost and environmental pollution, The effect of superior luminous performance

Pending Publication Date: 2022-04-12
THE GBA NAT INST FOR NANOTECHNOLOGY INNOVATION +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are certain deficiencies in the prior art. For example, although the luminous efficiency of the nano-phosphor powder prepared by the sol-gel method is low, it cannot be well used in the improvement of the color rendering index of white light LEDs. At the same time, the nano-phosphor powder prepared by the sol-gel method The process is more complicated, it is difficult to produce in large quantities, and the cost is higher

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
  • Yellow fluorescent powder as well as preparation method and use method thereof
  • Yellow fluorescent powder as well as preparation method and use method thereof
  • Yellow fluorescent powder as well as preparation method and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] The methods used in the prior art for the preparation of phosphors include: high-temperature solid-state reaction method, co-precipitation method to prepare precursors, sol-gel method and combustion method.

[0030] The high-temperature solid-state reaction method is a reaction method in which solid particles are mixed and sintered at a temperature below the melting point. In the solid state sintering process of the unit system, except for the bonding between powder particles, densification and the change of the structure of pure metal, there is no dissolution between the structures, and there is no new composition or new phase. Within the range of temperature control, the high-temperature solid-phase reaction method is stable, easy to operate and less required for the reaction. However, during the implementation of the high-temperature solid-state reaction method, if the particle size of the participating substances is large, there will be a phenomenon of component seg...

Embodiment 1

[0047] A kind of yellow fluorescent powder, its chemical formula is: Bi 1-x Ca 3 (PO 4 ) 3 O:xDy 3+ , where x=0.01. The above yellow phosphor Bi 0.99 Ca 3 (PO 4 ) 3 O:0.01Dy 3+ The preparation method:

[0048] Weigh CaCO 3 : 3g, Bi 2 o 3 : 230.67g, NH 4 h 2 PO 4 : 3.451g, Dy 2 o 3 : 1.865g. Put the above compound into a quartz mortar and crush it by means of grinding and mixing evenly, then transfer it to a crucible or other heating reaction device and place it in a muffle furnace, and pre-sinter it at 350°C in an air atmosphere, and the sintering time is 10h , after natural cooling, take it out from the crucible or other heating reaction device; smash it again and mix it evenly, transfer it to the crucible or other heating reaction device and put it into a muffle furnace, and sinter at 1400 ° C for 2 hours under air atmosphere to obtain the solid After natural cooling and grinding, it becomes yellow phosphor Bi 0.99 Ca 3 (PO 4 ) 3 O:0.01Dy 3+ . The pu...

Embodiment 2

[0050] A kind of fluorescent powder, its chemical formula is: Bi 1-x Ca 3 (PO 4 ) 3 O:xDy 3+ , where x=0.03. The above-mentioned phosphor Bi 0.97 Ca 3 (PO 4 ) 3 O:0.03Dy 3+ The preparation method:

[0051] Weigh CaCO 3 : 3g, Bi 2 o 3 : 226g, NH 4 h 2 PO 4 : 3.451g, Dy 2 o 3 : 5.595g. Put the above compound into a quartz mortar and crush it by grinding and mixing evenly, then transfer it to a crucible or other heating reaction device and place it in a muffle furnace, and pre-sinter at 500°C in an air atmosphere for 10 hours. , after natural cooling, take it out from the crucible or other heating reaction device; pulverize again and mix evenly, transfer to the crucible or other heating reaction device and put it into the muffle furnace, and sinter at 1000 ° C for 10 h under the condition of air atmosphere to obtain the solid After natural cooling and grinding, it becomes yellow phosphor Bi 0.97 Ca 3 (PO 4 ) 3 O:0.03Dy 3+ .

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 provides yellow fluorescent powder. The general chemical formula of the yellow fluorescent powder is Bi (1-x) Ca3 (PO4) 3O: xDy < 3 + >, and x is molar fraction and ranges from 0.001 to 1. The invention relates to a preparation method of yellow fluorescent powder, which comprises the following steps: respectively weighing a compound containing Bi < 2 + >, a compound containing Ca < 2 + >, a compound containing Dy < 3 + > and a compound containing P < 3 + > according to the stoichiometric ratio of each element in the chemical formula Bi < 1-x > Ca3 (PO4) 3O: xDy < 3 + >, and carrying out presintering pretreatment to obtain a first mixture; carrying out low-temperature sintering treatment on the first mixture in an air atmosphere to obtain a pre-sintered first mixture; and naturally cooling and fully crushing the pre-sintered first mixture, performing high-temperature sintering in an air atmosphere, and naturally cooling and crushing the obtained solid to obtain the yellow fluorescent powder.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a yellow fluorescent powder, a preparation method and a use method thereof. Background technique [0002] In recent years, the application scope of LED light sources has broad prospects, such as backlights for liquid crystal displays, LED lamps, etc. Phosphor powder is used as a luminous coating for LED light sources, and it can appear in the form of a single component or multiple components during use. [0003] For example, Chinese Patent No. CN103923646B discloses a yellow fluorescent powder and a preparation method thereof. The general chemical expression of yellow phosphor is (Ca 0.37 ,Sr 0.53-x-y , Ba x ) 7 (SiO 3 ) 6 Cl 2 :0.10Eu 2+ ,yDy 3+ , where 0.05≤x≤0.15, 0.01≤y≤0.09; its preparation method is to use self-help solvent method, CaCO 3 , SrCl 2 ·6H 2 O, BaCl 2 , SiO 2 , Eu 2 o 3 and Dy 2 o 3 Sintering at a constant temperature of 950°C fo...

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): C09K11/74C09K11/02H01L33/50H01L33/56
Inventor 李成宇秦新苗王森孙瑞琦王湛之王朝伟张洪杰
Owner THE GBA NAT INST FOR NANOTECHNOLOGY INNOVATION