TWI608074B - Process of manufacturing phosphor composite - Google Patents

Description

Compound fluorescent system

The present invention relates to a composite fluorescent process.

Fluorescent bodies are widely used today, for example, in optical devices such as LED lamps, projection devices, and displays.

Fluorescent bodies of the prior art are used to improve the heat accumulation caused by the silica gel mixed fluorescent material, and the high-power light source is more likely to cause heat accumulation of the phosphor. Therefore, glass materials are often used today to mix fluorescent powders to solve the problem of deterioration of tannins; however, glass phosphors of the prior art often have temperatures of up to 1000 ° C during sintering, which increases manufacturing costs. .

Further, the glass transition temperature (Tg) of the prior art phosphor is less than 500 °C. Therefore, the phosphor of the prior art has a poor heat resistance, and is easily deteriorated by irradiation with a high-power light source for a long period of time, resulting in a decrease in luminous efficiency.

Therefore, it is necessary to provide a novel and progressive composite fluorescent process to solve the above problems.

The main object of the present invention is to provide a composite fluorescent process which can improve luminous efficiency.

To achieve the above object, the present invention provides a composite fluorescent process comprising: preparing an alumina-based material comprising X weight percent (w%) of an alkali metal oxide and (100-X) weight percent Alumina, X is 1.00 to 20.00, the alkali metal is lithium, sodium or potassium; preparing a glass fluorescent mixture; sintering the alumina-based material and the glass fluorescent mixture at a temperature of 750 ° C to 850 ° C, A composite phosphor is formed.

The following is a description of the possible embodiments of the present invention, and is not intended to limit the scope of the invention as claimed.

Referring to Figures 1 to 4, there is shown a first preferred embodiment of the present invention. The composite phosphor 1 process of the present invention comprises the following steps:

Step S1: preparing an alumina-based material 10 comprising X weight percent (w%) of an alkali metal oxide and (100-X) weight percent of alumina, X being from 1.00 to 20.00, the base The metal is lithium, sodium or potassium; step S2: preparing a glass fluorescent mixture 20; step S3: sintering the alumina-based material 10 and the glass fluorescent mixture 20 at a temperature of 750 ° C to 850 ° C to form a composite Phosphor 1 However, the order of steps S1 to S2 is not limited. Thereby, the luminous efficiency can be improved. Wherein, the composite phosphor 1 has a glass transition temperature (Tg) ranging from 500 ° C to 800 ° C, which can improve heat resistance and luminous efficiency; in the embodiment, the luminous efficiency of the composite phosphor 1 is greater than 300 lm / W.

In this embodiment, in step S1, the alumina-based material 10 is sintered into a substrate at a temperature of 1600 ° C; in step S2, the glass phosphor mixture 20 is powdered and coated on the alumina. The substrate is then sintered.

The glass fluorescent hybrid material 20 comprises (100 wt%-Y) alumina or aluminum nitride and Y phosphor powder, and Y is 1.00 wt% to 80.00 wt%, which has a reflection effect and enhances the heat conduction effect. Wherein the phosphor powder comprises a group selected from the group consisting of yttrium aluminum garnet (YAG), nitride (Nitride), lanthanum aluminum oxide (LuAG) and silicate (Silicate); preferably, nitride (Nitride) ) includes AlCaClN3Si:Eu ²⁺ ; lanthanum aluminum oxide (LuAG) contains trivalent cerium; yttrium aluminum garnet (YAG) contains trivalent cerium; among them, trivalent cerium and divalent lanthanide act as activators. In other embodiments, the phosphor powder may be further selected from the group consisting of (Sr, Ba) ₂ SiO ₄ :Eu ²⁺ , Si6-zAl zOzN8-z:Eu ²⁺ (β-SiAlON), and Sr ₂ Si ₅ N ₈ : Eu ²⁺ . In this embodiment, the phosphor powder comprises a mixture of red phosphor powder, yellow phosphor powder and green phosphor powder, red phosphor powder such as AlCaClN3Si:Eu ²⁺ ; yellow phosphor powder such as yttrium aluminum garnet (YAG) ); green fluorescent powder such as Lu ₃ Al ₅ O ₁₂ :Ce ³⁺ .

The composite phosphor 1 process may further comprise a step S4 of grinding the composite phosphor 1 to a thickness ranging from 0.15 mm to 0.75 mm.

5 to 7, which is a second preferred embodiment of the present invention, which differs from the first preferred embodiment in that the glass phosphor mixture 20 can be a substrate and layered on the alumina. The substrate is then sintered.

Please refer to FIG. 8 , which is a third preferred embodiment of the present invention, which is different from the first preferred embodiment in that the alumina-based material 10 and the glass phosphor mixture 20 are powdered and The phases are mixed to form a composite phosphor 2.

In summary, the composite phosphor 1 process of the present invention can improve the luminous efficiency and increase the glass transition temperature (Tg) to improve the heat resistance of the composite phosphor 1, 2, in addition to the composite phosphor 1, 2 It is integrally molded to enhance structural strength and extend service life.

S1~S4‧‧‧ steps

1, 2‧‧‧ composite phosphor

10‧‧‧Alumina-based materials

20‧‧‧Glass Fluorescent Mixture

1 is a flow chart of a first preferred embodiment of the present invention. 2 to 4 are schematic views showing the manufacturing steps of a first preferred embodiment of the present invention. 5 to 7 are schematic views showing the manufacturing steps of a second preferred embodiment of the present invention. Figure 8 is a perspective view of a composite phosphor according to a third preferred embodiment of the present invention.

S1~S4‧‧‧ steps

Claims (9)

A composite fluorescent process comprising the steps of: preparing an alumina-based material comprising X weight percent (w%) alkali metal oxide and (100-X) weight percent alumina, X 1.00 to 20.00, the alkali metal is lithium, sodium or potassium; preparing a glass fluorescent mixture; sintering the alumina-based material and the glass fluorescent mixture at a temperature of 750 ° C to 850 ° C to form a composite phosphor Wherein, the glass fluorescent mixture comprises (100 wt%-Y) alumina or aluminum nitride and Y phosphor, and Y is 1.00 wt% to 80.00 wt%. The composite fluorescent process of claim 1, wherein the alumina-based material is sintered to a substrate at a temperature of 1600 °C. The composite fluorescent system according to claim 2, wherein the glass-fluorescent mixed material is powdered and coated on the alumina substrate, followed by sintering. The composite fluorescent system according to claim 2, wherein the glass fluorescent mixed material is a substrate and is layered on the alumina substrate and then sintered. The composite fluorescent process of claim 1, wherein the alumina-based material and the glass-fluorescent mixture are powdered and mixed. The composite fluorescent process of claim 1, wherein the composite phosphor has a glass transition temperature (Tg) ranging from 500 ° C to 800 ° C. The composite phosphor process of any one of claims 1 to 6, further comprising the step of grinding the composite phosphor to a thickness ranging from 0.15 mm to 0.75 mm. The composite fluorescent process of claim 3, wherein the glass fluorescent mixture comprises (100 wt%-Y) alumina or aluminum nitride and Y phosphor, and Y is 1.00 wt% to 80.00 wt%. The composite phosphor process further includes a step of grinding the composite phosphor to a thickness ranging from 0.15 mm to 0.75 mm, and the glass transition temperature (Tg) of the composite phosphor is in a temperature range of 500 ° C. Up to 800 ° C; the phosphor comprises a group selected from the group consisting of YAG, Nitride, LuAG and Silicate; Including AlCaClN3Si:Eu ₂ ⁺ ; lanthanum aluminum oxide (LuAG) contains trivalent ruthenium; yttrium aluminum garnet (YAG) contains trivalent ruthenium. The composite fluorescent process of claim 5, wherein the glass fluorescent mixture comprises (100 wt%-Y) alumina or aluminum nitride and Y phosphor, and Y is 1.00 wt% to 80.00 wt%. The composite phosphor process further includes a step of grinding the composite phosphor to a thickness ranging from 0.15 mm to 0.75 mm, and the glass transition temperature (Tg) of the composite phosphor is in a temperature range of 500 ° C. Up to 800 ° C; the phosphor comprises a group selected from the group consisting of YAG, Nitride, LuAG and Silicate; Including AlCaClN3Si:Eu ₂ ⁺ ; lanthanum aluminum oxide (LuAG) contains trivalent ruthenium; yttrium aluminum garnet (YAG) contains trivalent ruthenium.