A kind of preparation method of yag:sm3+,bi3+ fluorescent glass

A technology of fluorescent glass and precursor, applied in the field of preparation of YAG:Sm3+, Bi3+ fluorescent glass, can solve the problems of lack of red light, shortened service life, high color temperature, and achieve the effect of improving light color quality and prolonging service life

Inactive Publication Date: 2016-01-06
NANTONG UNIVERSITY
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Problems solved by technology

The disadvantage is that the product purity and luminous performance need to be improved
Facing high-power white light LEDs, the phosphor materials have the following problems that have not been effectively resolved: (1) It is difficult to precisely control the thickness and shape of the phosphor powder with resin or silica gel packaging, resulting in bluish or yellowish light; (2) ) Phosphor powder and packaging materials age over time, shortening the service life; (3) Lack of red light, resulting in low color rendering and high color temperature

Method used

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  • A kind of preparation method of yag:sm3+,bi3+ fluorescent glass
  • A kind of preparation method of yag:sm3+,bi3+ fluorescent glass
  • A kind of preparation method of yag:sm3+,bi3+ fluorescent glass

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Embodiment Construction

[0035] A YAG:Sm 3+ , Bi 3+ The preparation method of fluorescent glass comprises the following steps:

[0036] (1) Preparation of precursor:

[0037] Prepare yttrium nitrate, samarium nitrate, bismuth nitrate, and aluminum nitrate solutions with a concentration of 0.2mol / L, according to the stoichiometric ratio Y:Sm:Bi:Al=2.95-y:0.05:y:10, that is, 29.5-10 μmL of yttrium nitrate, Samarium nitrate 0.5mL, bismuth nitrate 10μmL, aluminum nitrate 100mL, y=0, 0.02, 0.04, 0.06, 0.08, add the metal ion solution into the mixed precipitant at a constant temperature of 25°C at a constant flow rate of 3mL / min with a separatory funnel, Stir continuously, adjust the pH to 6.5 with ammonia water during the dropwise addition, continue to stir for 2 hours after the dropwise addition, stop stirring, age for 12 hours, pour off the supernatant, and after the precipitation is centrifuged, wash the precipitation precursor twice with deionized water 1. Wash with ethanol twice to remove water and...

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Abstract

The present invention discloses a preparation method for YAG: Sm<3+>, Bi<3+> fluorescent glass. The preparation method comprises the following steps: preparing a YAG precursor by using a chemical coprecipitation method; and uniformly mixing 1 g of Ba2CO3, 0.4 g of Na2CO3, 0.9 g of H3PO4, 0.3 g of SiO2, 0.56 g of Al2O3 and 0.8 g of the YAG precursor and calcining an obtained mixture at a temperature of 1400 DEG C so as to obtain the fluorescent glass. The YAG: Sm<3+>, Bi<3+> fluorescent glass prepared in the invention generates red light under excitation of a near ultraviolet LED chip and can be used for preparing a low-color temperature white LED light source.

Description

technical field [0001] The present invention relates to a kind of YAG:Sm 3+ , Bi 3+ Preparation method of fluorescent glass. Background technique [0002] At this stage, YAG precursors are generally prepared by the following methods: [0003] A high temperature solid phase reaction method [0004] The high-temperature solid-phase method is a traditional synthesis method. The phosphor synthesized by this method has stable performance and high brightness, but the particle size is large, and it must be ball-milled before application. The high-temperature solid-state reaction method is also a method commonly used in industrial mass production. The method is relatively mature, the process is simple, and it is easy to operate. [0005] B spray pyrolysis method [0006] Spray pyrolysis is an emerging method for synthesizing inorganic functional materials in recent years. The luminescent materials prepared by this method generally have a uniform spherical shape and a narrow pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C4/12
Inventor 缪建文宋国华张谦葛存旺张跃华陆超
Owner NANTONG UNIVERSITY
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