US 9,260,340 B2 · Luminous nano-glass-ceramics used as white LED source and preparing method of luminous nano-glass-ceramics

Abstract

A luminous nano-glass-ceramics used as white LED source and the preparing method of nano-glass-ceramics are provided. The glass is a kind of non-porous compact SiO2 glass in which luminous nano-microcrystalites are dispersed. The luminous nano-microcrystalite has the chemical formula of YxGd3-xAl5O12:Ce, wherein 0≦x≦3. The stability of the said glass is good and its irradiance is uniform. The preparing method comprises the following steps: dissolving the compound raw materials in the solvent to form mixed solution, dipping the nano-microporous SiO2 glass in the solution, taking it out and air drying, sintering at the temperature of 1100-1300° C. for 1-5 hours by stage heating, and obtaining the product. The method has a simple process, convenient operation and low cost.

Claims10

Dependent claims

A luminescent nano-crystalline glass for white LED source comprising a non-porous compacted SiO2 glass in which luminescent nano-crystallites of formula YxGd3-xAl5O12:Ce are dispersed, wherein 0≦x≦3.

A method for manufacturing a luminescent nano-crystalline glass for white LED source, comprising the following steps:

(1) using at least one of oxides, nitrates, chlorides, sulfates, acetates of Y3+ and Gd3+;
at least one of oxides, nitrates, chlorides, sulfates, acetates of Al3+;
and at least one of oxides, nitrates, chlorides, sulfates, acetates of Ce3+ as raw materials, dissolving the raw materials in a solvent to prepare a mixed solution of ions of luminescent compounds, wherein the concentration of Al3+ is 0.5˜2 mol/L, the sum of the concentrations of Y3+ and Gd3+ is 0.3˜1.2 mol/L, and the concentration of Ce3+ is 0.001˜0.2 mol/L;
(2) selecting a SiO2 nano-porous glass having interconnected pores as a substrate, wherein the volume of the pores in the SiO2 nano-porous glass represents 25˜40% of the total volume of the SiO2 nano-porous glass;
and placing the SiO2 nano-porous glass into the mixed solution obtained in step (1) and soaking for above 10 minutes;
(3) gradually heating the soaked SiO2 nano-porous glass to 1100˜1300° C. and sintering for 1˜5 hours, to give the luminescent nano-crystalline glass for white LED source.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

13/582,501Filed 5 Mar 2010

Published

US 2012/0319045 A120 Dec 2012

Granted

16 Feb 2016

Term ends

Not estimatedThe source records don’t support an estimate.

Classification17 codes

C03C 3/06
Containing silica: with more than 90% silica by weight, e.g. quartz
C03C 4/12
Compositions for glass with special properties: for luminescent glass; for fluorescent glass
C03C 14/006
Glass compositions containing a non-glass component, e.g. compositions containing fibres, filaments, whiskers, platelets, or the like, dispersed…:…
C04B 35/44
Based on oxide ceramics: based on aluminates

Luminous nano-glass-ceramics used as white LED source and preparing method of luminous nano-glass-ceramics

Life of this patent

Luminous nano-glass-ceramics used as white LED source and preparing method of luminous nano-glass-ceramics

Life of this patent

Abstract

Claims10