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Co-precipitation preparation method, phosphor and application of pyrophosphate phosphor powder containing alkaline earth metal elements

A technology of metal element pyrophosphate and phosphor, applied in chemical instruments and methods, electrical components, luminescent materials, etc., can solve problems such as endangering human health, high local temperature, and large particle size of products, so as to reduce harm and protect the environment Pollution, to avoid the release of gas, the effect of uniform particle size distribution

Active Publication Date: 2016-09-14
JIANGMEN KANHOO IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All contain (NH 4 ) 2 HPO 4 Crystal, so there are the following defects: a, (NH 4 ) 2 HPO 4 The crystal particles are relatively thick, and it is difficult to mix the raw materials, which leads to a large particle size of the product and serious light decay in post-processing; b. The local temperature is high during grinding, (NH 4 ) 2 HPO 4 Crystals are easy to decompose to produce ammonia gas, which is harmful to human health and pollutes the ecological environment, especially in the process of large-scale production

Method used

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  • Co-precipitation preparation method, phosphor and application of pyrophosphate phosphor powder containing alkaline earth metal elements
  • Co-precipitation preparation method, phosphor and application of pyrophosphate phosphor powder containing alkaline earth metal elements
  • Co-precipitation preparation method, phosphor and application of pyrophosphate phosphor powder containing alkaline earth metal elements

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0034] example 1 ： Ca 2 P 2 o 7 :0.01Eu 2+ ,0.1Mn 2+ Phosphor Synthesis

[0035] Weigh accurately according to the stoichiometric ratio (NH 4 ) 2 HPO 4 15.847g, dissolved in deionized water, prepared solution A with a concentration of 0.5mol / L, then pipetted 10ml polyethylene glycol-400 in solution A; and accurately weighed MnO 0.355g, Eu 2 o 3 0.352g is made into a suspension, add concentrated hydrochloric acid to the suspension, heat, and continue heating until the pH value of the solution reaches 6-7; add Ca(NO 3 ) 2 22.316g, formulated as mixed solution B.

[0036] Under the condition of constantly stirring solution A, introduce solution B into solution A to obtain a precipitate, filter the precipitate, wash with hot water at 80-90°C for 2-3 times, dry and grind to obtain a precursor evenly.

[0037] Put the dried and ground uniform precursor into the crucible, under N 2 Calcined at 800°C for 4 hours in the atmosphere, then continued to heat up, under N ...

example 2

[0039] example 2 ： Ca 1.5 Mg 0.5 P 2 o 7 :0.01Eu 2+ ,0.1Mn 2+ Phosphor Synthesis

[0040] Weigh accurately according to the stoichiometric ratio (NH 4 ) 2 HPO 4 15.847g, dissolved in deionized water, prepared solution A with a concentration of 1.0mol / L, then pipetted 10ml polyethylene glycol-300 in solution A; and accurately weighed 0.355g of MnO, Eu 2 o 3 0.352g is made into a suspension, add concentrated hydrochloric acid to the suspension, heat, and continue heating until the pH value of the solution reaches 6-7; add Ca(NO 3 ) 2 20.316g, Mg(NO 3 ) 2 :6H 2 O 10.306g, prepared as mixed solution B.

[0041] Under the condition of constantly stirring solution A, introduce solution B into solution A to obtain a precipitate, filter the precipitate, wash with hot water at 80-90°C for 2-3 times, dry and grind to obtain a precursor evenly.

[0042] Put the dried and ground uniform precursor into the crucible, under N 2 Calcined at 850°C for 5 hours in the atmo...

example 3

[0044] example 3 ： Ca 1.5 Sr 0.5 P 2 o 7 :0.01Eu 2+ ,0.1Mn 2+ Phosphor Synthesis

[0045] Weigh accurately according to the stoichiometric ratio (NH 4 ) 2 HPO 4 15.847g, dissolved in deionized water, prepared solution A with a concentration of 0.8mol / L, then pipetted 8ml polyethylene glycol-200 in solution A; and accurately weighed 0.355g of MnO, Eu 2 o 3 0.352g is made into a suspension, add concentrated hydrochloric acid to the suspension, heat, and continue heating until the pH value of the solution reaches 6-7; add Ca(NO 3 ) 2 20.316g, Sr(NO 3 ) 2 15.306g, formulated as mixed solution B.

[0046] Under the condition of constantly stirring solution A, introduce solution B into solution A to obtain a precipitate, filter the precipitate, wash with hot water at 80-90°C for 2-3 times, dry and grind to obtain a precursor evenly.

[0047] Put the dried and ground uniform precursor into the crucible, under N 2 Calcined at 800°C for 8 hours in the atmosphere,...

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Abstract

The invention provides a coprecipitation preparation method for a pyrophosphate phosphor containing alkaline earth metal. The pyrophosphate phosphor has a general formula of Mg<2-m-n-k>Ca<m>Sr<n>Ba<k>P<2>O<7>: xRE, yM, wherein m is no less than 0 and no more than 2.0, n is no less than 0 and no more than 2.0, k is no less than 0 and no more than 2.0, m+n+k is no less than 0 and no more than 2.0, x is no less than 0 and no more than 0.1, y is no less than 0 and no more than 0.2, RE is one or two selected from the group consisting of Y<3+>, La<3+>, Ce<3+>, Pr<3+>, Nd<3+>, Sm<3+>, Eu<3+>, Eu<2+>, Gd<3+>, Tb<3+>, Dy<3+>, Ho<3+>, Er<3+>, Tm<3+>, Yb<3+> and Lu <3+>, and M is one or two selected from the group consisting of Mn<2+>, Cu<2+>, Cu<+>, Pb<2+> and Bi<3+>. The obtained phosphor has the advantages of uniform particle size distribution, stable chemical properties, good luminescence properties and capacity of being effectively excited by ultraviolet rays and is applicable to near ultraviolet chip-excited white-light LED, three-primary-color energy-saving lamps, lamps for plant growth, agricultural light-converting films, etc.

Description

technical field [0001] The invention belongs to the field of luminescent materials, and relates to a co-precipitation preparation method of pyrophosphate fluorescent powder containing alkaline earth metal elements, the fluorescent powder and an application thereof. Background technique [0002] The pyrophosphate system luminescent material containing alkaline earth metal has many advantages such as high luminous efficiency, simple synthesis conditions, low cost and stable chemical properties, and is a good matrix for preparing fluorescent materials. Eu reported in the literature 2+ , Mn 2+ The phosphor of the co-doped pyrophosphate system has a broad excitation spectrum in the ultraviolet region, and has two strong emission peaks in the blue light region and the red light region respectively under the excitation of ultraviolet light. The good luminescent properties show that the phosphors of the pyrophosphate system have great application prospects in white LEDs, tricolor ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/71H01L33/50
CPCY02B20/00
Inventor 葛勇杰陈茜陈涛万国江
Owner JIANGMEN KANHOO IND