Vanadate upconversion material fluorescent powder, and preparation method and application thereof

A conversion material and vanadate technology, which is applied in luminescent materials, chemical instruments and methods, and the use of gas discharge lamps, etc., can solve the problems of color coordinate drift of mixed white light, UV pollution of LED chips, etc., and achieve the effect of avoiding pollution
CN102585827AInactive Publication Date: 2012-07-18BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
2 Cites 4 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
Publication Date
2012-07-18
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 discloses vanadate upconversion material fluorescent powder, and a preparation method and application thereof. The vanadate upconversion material fluorescent powder has a chemical composition formula Y0.89-x-yVO4:0.01Tm<3+> / xEr<3+> / yHo<3+> / 0.1Yb<3+>, wherein x is 0 to 0.002, and y is 0 to 0.003. The invention also discloses the preparation method for the material, and the preparation method comprises the following steps of: weighing yttrium oxide, vanadium pentoxide, thulium oxide, holmium oxide, erbium oxide and ytterbium oxide in a molar ratio of the chemical composition formula, grinding and mixing uniformly, pre-sintering at the temperature of 650 DEG C, and keeping constant temperature of 650 DEG C for six hours; cooling, grinding again, sintering at the temperature of 1,200 DEG C, and keeping the constant temperature of 1,200 DEG C for six hours; and cooling to obtain the vanadate upconversion material fluorescent powder. The vanadate upconversion material fluorescent powder is high in luminous efficiency and stability and meets the requirement of a white light light-emitting diode (LED).
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a vanadate up-conversion material fluorescent powder, a preparation method and application thereof. Background technique

[0002] At present, the technology of realizing white light LED can be divided into three types. One is to assemble red, green and blue three primary color LED chips together to realize white light. However, due to the temperature rise of different LED devices, the degree of luminous brightness decline varies greatly. , the result is the drift of the color coordinates of the mixed white light. The second is to use the blue LED chip to excite the yellow-emitting YAG:Ce phosphor, and the combination of blue light and yellow light to obtain white light. Due to the lack of red spectral components in this white light, the light source The color rendering index is low. The third is to use the near-ultraviolet light emitted by the near-ultraviolet LED chip to excite the three primary color phosphors to obtain whit...

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