White light LED (Light Emitting Diode) fluorescent powder and preparation method thereof

A phosphor powder and white light technology, applied in the field of phosphor powder, can solve problems such as incompatibilities in preparation, difficulties in achieving a color rendering index of devices above 80, and obstacles to the development of white light LED light-emitting devices.
CN102344809AInactive Publication Date: 2012-02-08IRICO
2 Cites 4 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
IRICO
Publication Date
2012-02-08
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to white light LED (Light Emitting Diode) fluorescent powder with a chemical formula Sr(3-x)MgSiO7:xTb<3+>, wherein x is more than or equal to 0.01 and less than or equal to 0.25. The invention also provides a preparation method of the white light LED fluorescent powder. The preparation method comprises the following steps of: weighing silicon dioxide, magnesia, strontium carbonate and tetraterbium heptoxide; adding a charge compensator and a fusing assistant; mixing and grinding the raw materials; and feeding the mixture in a roasting crucible for roasting; cooling, crushing, washing and sieving to obtain the white light LED fluorescent powder. The white light LED fluorescent powder disclosed by the invention has the advantages of low price of raw materials, simple synthetic method, low loss of equipment, no need of special high-temperature equipment and the like.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of fluorescent powder, and in particular relates to a white light LED fluorescent powder and a preparation method thereof. Background technique

[0002] As a new generation of green and environmentally friendly solid-state lighting green light source, light-emitting diodes have low energy consumption, long life, small size, very stable structure, good light directivity, fast response, no radiation, and are suitable for harsh environments. At present, the main means of producing white light in light-emitting diodes (LEDs) is to excite YAG:Ce phosphor powder with blue light chips. But the emission spectrum of YAG:Ce phosphor is between 550nm and 560nm, so it cannot be combined with blue light chips to produce LED devices with positive white light (x, 0.333y, 0.333) and low color warm tone (CCT≤5000K). In addition, the half peak width of YAG:Ce phosphor is relatively narrow, generally around 110nm, which makes it diffic...

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