Unlock instant, AI-driven research and patent intelligence for your innovation.
Method for preparing white light LED phosphor powder and flux therefor
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of phosphor and flux, applied in the field of preparing white LED phosphor, can solve the problem of reducing the brightness of phosphor, and achieve the effect of improving brightness and performance
Inactive Publication Date: 2009-04-29
XIAMEN TOPSTAR LIGHTING
View PDF6 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
Their use increases YAG:Ce 3+ The introduction of foreign metal ions in the phosphor, which will reduce the brightness of the phosphor and have an adverse effect on the performance of the phosphor
Method used
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
View more
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0026] A flux for preparing white light LED phosphor powder is a composite flux. Composite fluxes include one or more compounds and mullite powder.
[0027] The fluorescent powder of this embodiment is Y 3-x al 5 o 12 :xCe 3+ . The molar ratio of each metal ion in the raw material and the flux is equal to the molar ratio of each metal ion in the fluorescent powder. Wherein, the value range of x is (0.01-0.15), and its possible values are 0.03, 0.035, 0.04, 0.045, 0.05, 0.055, 0.06, 0.065.
[0028] The metal ion contained in the flux compound is Ce 3+ . Flux compounds were CeF 3 or with CeCl 3 or and Ce(NO 3 ) 3 ·6H 2 O or and Ce 2 (C 2 o 4 ) 3 or and Ce 2 (CO 3 ) 3 .
[0029] The weight of the composite flux accounts for (0.5-10)% of the total weight of the raw materials and the flux. If the weight of the composite flux accounts for (2-4)% of the total weight of the raw materials and the flux, the effect is better, and its possible values are 2.4%, 2.6...
Embodiment 2
[0037] The difference between the present embodiment and the first embodiment is that the fluorescent powder of the present embodiment is (Y 1-x-y Ce x R y ) 3 al 5 o 12 . Wherein R is Eu or and Sm or and Tb. Wherein, the value range of x is (0.01-0.15), and its possible values are 0.03, 0.035, 0.04, 0.045, 0.05, 0.055, 0.06, 0.065. The value range of y is (0-0.01), and it can be 0, 0.001, 0.005, 0.01.
[0038] The metal ion contained in the flux compound is Ce 3+ . Flux compounds were CeF 3 or with CeCl 3 or and Ce(NO 3 ) 3 ·6H 2 O or and Ce 2 (C 2 o 4 ) 3 or and Ce 2 (CO 3 ) 3 .
Embodiment 3
[0040] The difference between this embodiment and Embodiment 1 is that the composition of phosphor powder in this embodiment is Y 3-x-y Gd y al 5-z Ga z o 12 :xCe 3+ . Wherein, the value range of x is (0.01-0.15), and its possible values are 0.03, 0.035, 0.04, 0.045, 0.05, 0.055, 0.06, 0.065. The value range of y is (0-2.5), and it can be 0, 0.5, 1, 1.5, 2, 2.5. The value range of z is (0-4), and it can take values 0, 1, 2, 3, 4.
[0041] The metal ion contained in the flux compound is Ce 3+ . Flux compounds were CeF 3 or with CeCl 3 or and Ce(NO 3 ) 3 ·6H 2 O or and Ce 2 (C 2 o 4 ) 3 or and Ce 2 (CO 3 ) 3 .
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
PUM
Property
Measurement
Unit
luminous efficiency
aaaaa
aaaaa
Login to View More
Abstract
This invention discloses a method for producing white light LED fluorescent powder and fluxing agent. The fluxing agent used in producing white light LED fluorescent powder comprises at least one compound, in which the metal ions are the same with those in the fluorescent powder. The process for producing white light LED fluorescent powder comprises: (1) charging and mixing material: weight and homogenously mix the raw material and fluxing agent to obtain the total mixing material, wherein the raw material comprises Y2O3, Al2O3, Gd2O3, Ga2O3, CeO2 or any compound that can decompose these oxide compounds, and the fluxing agent comprises at least one compound in which the metal ions are the same with those in the fluorescent powder; (2) high temperature burning; (3) post treatment. The fluxing agent and the method of this invention do not introduce other metal ions into the fluorescent powder, which further improves the brightness and usability of the fluorescent powder.
Description
Technical field [0001] The invention relates to a method for preparing white LED phosphor powder and a flux, in particular to a method for preparing white LED phosphor and a flux that can seldom introduce foreign metal ions into the phosphor. Background technique [0002] With the rapid development of white LED, the YAG:Ce 3+ Phosphor powder requirements are getting higher and higher. Requires YAG: Ce 3+ Phosphor powder has higher brightness and excellent performance. In addition to the purity of raw materials and the burning process and other conditions for YAG: Ce 3+ In addition to affecting the brightness and performance of phosphor powder, the choice of flux has a great influence on the performance of YAG: Ce 3+ The brightness and performance of the phosphor also have a great influence. The function of the flux is to reduce the burning temperature and increase the crystallinity. Current fluxes are usually Ba compounds (such as Ba(NO 3 ) 2 、BaF 2 , BaCl 2 2H 2 ...
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
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More