CN103343003A - Preparation method of silicate red fluorescent powder - Google Patents

Preparation method of silicate red fluorescent powder Download PDF

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CN103343003A
CN103343003A CN2013102646004A CN201310264600A CN103343003A CN 103343003 A CN103343003 A CN 103343003A CN 2013102646004 A CN2013102646004 A CN 2013102646004A CN 201310264600 A CN201310264600 A CN 201310264600A CN 103343003 A CN103343003 A CN 103343003A
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mixture
preparation
red fluorescence
sio
silicate red
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苏醒宇
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Irico Group Corp
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Irico Group Corp
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Abstract

The invention provides a preparation method of silicate red fluorescent powder. The method comprises the following steps of: first, taking a first A source, SiO2 and Eu2O3 according to a stoichiometric ratio of A1-xSiO3:xEu<2+>, and sintering at a high temperature to obtain A1-xSiO3:xEu<2+> powder; then, weighing A1-xSiO3:xEu<2+> powder, a second A source and a catalyst according to the stoichiometric ratio of A3-xSiO5:xEu<2+>, and secondarily sintering at a high temperature, and washing and drying the sintered product to obtain the silicate red fluorescent powder with the chemical formula A3-xSiO5:xEu<2+>, wherein x is greater than or equal to 0.02 but less than or equal to 0.1, and A is a mixture of Sr and Ba or Sr. The strength of silicate red fluorescent powder particles can be enhanced and the shape of the silicate red fluorescent powder ball-milled can be improved by high temperature sintering twice through a high temperature solid phase method, so that the luminous decay resistance is indirectly enhanced. The method is simple and accessible, convenient to operate and suitable for industrial production.

Description

A kind of preparation method of silicate red fluorescence powder
Technical field
The present invention relates to a kind of preparation method of fluorescent material, particularly a kind of preparation method of silicate red fluorescence powder.
Background technology
Along with the development of Lighting Industry, when pursuing the environmental protection energy, also making great efforts that luminous mass is improved a step, illumination at present utilizes blue chip to excite yellow fluorescent powder with the preparation method of white light LEDs.This powder is because luminous single, though colour gamut is wide, still the arrive requirement of high quality light source of width is difficult to make the outstanding LED of colour rendering index with the blue light stack.
The market high-end product in blue-light excited yellow fluorescent powder, adds green and red fluorescence powder mostly in right amount now, in the hope of improving the spectral gamut scope, makes human eye under this light source, more can distinguish the true colors of object.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of LED usefulness silicate red fluorescence powder, simple, the suitable industrial production of this method.
For achieving the above object, the technical solution used in the present invention may further comprise the steps:
1) according to chemical general formula A 1-xSiO 3: xEu 2+In the metering of each element chemistry than taking by weighing an A source, SiO 2And Eu 2O 3, mix, put into tube furnace then, at N 2And H 2Mixed atmosphere under be warming up to 1100～1150 ℃ and be incubated 3～6h, be down to room temperature then, get A 1-xSiO 3: xEu 2+Powder; 0.02≤x≤0.1 wherein, A is the mixture of Sr, Ba or Sr and Ba, an A source is the oxide compound of A, carbonate or the oxide compound of A and the mixture of carbonate of A;
2) according to chemical general formula A 3-xSiO 5: xEu 2+In the metering of each element chemistry than taking by weighing A 1-xSiO 3: xEu 2+Powder and the 2nd A source mix, and get mixture, and wherein 0.02≤x≤0.1, the two A source is SrO, SrCO 3, BaO or BaCO 3
3) in mixture, add the catalyzer that accounts for mixture total mass 1～5%, mix, put into tube furnace then, at N 2And H 2Mixed atmosphere under be warming up to 1300～1350 ℃ and be incubated 10～14h, be down to room temperature then, get sintered product; Sintered product washing back is dry, and getting chemical formula is A 3-xSiO 5: xEu 2+The silicate red fluorescence powder, wherein 0.02≤x≤0.1, and A 3-xSiO 5: xEu 2+In A be mixture or the Sr of Sr and Ba.
An A source is SrO, SrCO in the described step 1) 3, BaO, BaCO 3, SrO and BaO mixture, SrO and BaCO 3Mixture, SrCO 3Mixture or SrCO with BaO 3And BaCO 3Mixture.
N in the described step 1) 2And H 2Mixed atmosphere in N 2With H 2Volume ratio be (3～5): 1.
Heat-up rate when heating up in the described step 1) is 5～10 ℃/min.
Described step 1) and step 2) in to mix be that mode by grinding in mortar reaches.
Catalyzer in the described step 3) is H 3BO 3, NaF, SrF 2Or BaF 2
N in the described step 3) 2And H 2Mixed atmosphere in N 2With H 2Volume ratio be (3～95): 1.
Heat-up rate when heating up in the described step 3) is 10～12.5 ℃/min.
To be milled to meta particle diameter (D50) before washing earlier be 8～12 microns for sintered product washing in the described step 3).
Drying in the described step 3) is 40～100 ℃ of oven dry down.
With respect to prior art, beneficial effect of the present invention is:
The invention provides a kind of preparation method of new silicate red fluorescence powder, adopt high temperature solid-state method, common cheap compound as starting material, is mixed at twice and carries out high temperature sintering twice according to the stoichiometric ratio of this fluorescent material, and preparing chemical general formula is A 3-xSiO 5: xEu 2+Silicate red fluorescence powder (0.02≤x≤0.1, A is mixture or the Sr of Sr and Ba).The intensity of this fluorescent powder grain that preparation method provided by the invention can strengthen and improve its ball milling after pattern, strengthen its anti-light decay indirectly; Than traditional method, the fluorescent powder grain that method of the present invention obtains is firmer, and better effects if behind the ball milling makes this fluorescent material become a kind of potential fluorescent material for white light LED.Method of the present invention is simple, raw material is cheap and easy to get, easy to operate, process window is wide, is a kind of preparation method who is fit to the industrial red fluorescence powder of silicate simply and easily.
Description of drawings
Fig. 1 is the SEM figure of the silicate red fluorescence powder that makes of the embodiment of the invention 1;
Fig. 2 is the SEM figure that adopts the silicate red fluorescence powder that traditional sintering method makes.
Embodiment
Reach technique means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with embodiment, the preparation method of the silicate red fluorescence powder that the present invention is proposed is elaborated.The chemical general formula of described silicate red fluorescence powder is A 3-xSiO 5: xEu 2+, wherein 0.02≤x≤0.1, and A 3-xSiO 5: xEu 2+In A be mixture or the Sr of Sr and Ba.
Embodiment 1
1) according to Sr 0.96SiO 3: 0.04Eu 2+(x=0.04 in the chemical general formula, stoichiometric ratio A=Sr) takes by weighing SrCO 3, SiO 2And Eu 2O 3And place mortar to mix by the mode of grinding, place tube furnace then, at N 2And H 2Mixed atmosphere under (N 2With H 2Volume ratio be 3:1) be warming up to 1100 ℃ and be incubated 3h with the speed of 5 ℃/min, then naturally cool to room temperature, again product is taken out and grinds and cross 200 eye mesh screens, namely get Sr 0.96SiO 3: 0.04Eu 2+Powder.
2) according to Sr 2.96SiO 5: 0.04Eu 2+(x=0.04 in the chemical general formula, stoichiometric ratio A=Sr) takes by weighing Sr 0.96SiO 3: 0.04Eu 2+Powder and SrCO 3And place mortar to mix by the mode of grinding, get mixture;
3) in mixture, add the NaF that accounts for mixture total mass 5%, mix, put into tube furnace then, at N 2And H 2Mixed atmosphere under (N 2With H 2Volume ratio be 3:1) be warming up to 1350 ℃ and be incubated 12 hours with the speed of 10 ℃/min, naturally cool to room temperature then, get sintered product; Sintered product is taken out, and being ground to meta particle diameter D50 is 11 microns, and then with deionized water wash and after 40 ℃ of dryings, namely obtaining chemical formula is Sr 2.96SiO 5: 0.04Eu 2+The silicate red fluorescence powder.
Fig. 1 is the SEM figure of the silicate red fluorescence powder that makes of the embodiment of the invention 1, the Sr that among this preparation method step 1) is made 0.96SiO 3: 0.04Eu 2+Powder is as presoma, and preparing chemical formula through the secondary high temperature sintering is Sr 2.96SiO 5: 0.04Eu 2+The silicate red fluorescence powder.Fig. 2 is the SEM figure that adopts the silicate red fluorescence powder that traditional sintering method makes, and namely directly synthesizes target product with a high temperature sintering, and the raw material of use is the same with embodiment 1 with operational condition, but does not use Sr 0.96SiO 3: 0.04Eu 2+Powder is as presoma.After the silicate red fluorescence powder that makes as can be seen from Fig. 2 is milled to pulverizing, and the fine-powder that much can't remove is arranged, and the morphology microstructure of the silicate red fluorescence powder among Fig. 1 improves much obviously.Pattern after the intensity of the silicate red fluorescence powder particles that preparation method provided by the invention can strengthen being described and improving its ball milling strengthens its anti-light decay indirectly; Than traditional method, the silicate red fluorescence powder particles that method of the present invention obtains is firmer, better effects if behind the ball milling.
Embodiment 2
1) according to Sr 0.94SiO 3: 0.06Eu 2+(x=0.06 in the chemical general formula, stoichiometric ratio A=Sr) takes by weighing SrO, SiO 2And Eu 2O 3And place mortar to mix by the mode of grinding, place tube furnace then, at N 2And H 2Mixed atmosphere under (N 2With H 2Volume ratio be 3:1) be warming up to 1150 ℃ and be incubated 6h with the speed of 10 ℃/min, then naturally cool to room temperature, again product is taken out and grinds and cross 200 eye mesh screens, namely get Sr 0.94SiO 3: 0.06Eu 2+Powder.
2) according to Ba 2Sr .94SiO 5: 0.06Eu 2+The stoichiometric ratio of (x=0.06 in the chemical general formula, A=Sr and Ba) takes by weighing Sr 0.94SiO 3: 0.06Eu 2+Powder and BaCO 3And place mortar to mix by the mode of grinding, get mixture;
3) in mixture, add the SrF that accounts for mixture total mass 3% 2, mix, put into tube furnace then, at N 2And H 2Mixed atmosphere under (N 2With H 2Volume ratio be 9:1) be warming up to 1300 ℃ and be incubated 14 hours with the speed of 12.5 ℃/min, naturally cool to room temperature then, get sintered product; Sintered product is taken out, and being ground to meta particle diameter D50 is 8 microns, and then with deionized water wash and after 100 ℃ of dryings, namely obtaining chemical formula is Ba 2Sr .94SiO 5: 0.06Eu 2+The silicate red fluorescence powder.
Embodiment 3
1) according to Ba 0.9SiO 3: 0.1Eu 2+(x=0.1 in the chemical general formula, stoichiometric ratio A=Ba) takes by weighing BaO, SiO 2And Eu 2O 3And place mortar to mix by the mode of grinding, place tube furnace then, at N 2And H 2Mixed atmosphere under (N 2With H 2Volume ratio be 3:1) be warming up to 1120 ℃ and be incubated 5h with the speed of 6 ℃/min, then naturally cool to room temperature, again product is taken out and grinds and cross 200 eye mesh screens, namely get Ba 0.9SiO 3: 0.1Eu 2+Powder.
2) according to Sr 2Ba 0.9SiO 5: 0.1Eu 2+The stoichiometric ratio of (x=0.1 in the chemical general formula, A=Sr and Ba) takes by weighing Ba 0.9SiO 3: 0.1Eu 2+Powder and SrCO 3And place mortar to mix by the mode of grinding, get mixture;
3) in mixture, add the BaF that accounts for mixture total mass 1% 2, mix, put into tube furnace then, at N 2And H 2Mixed atmosphere under (N 2With H 2Volume ratio be 95:1) be warming up to 1340 ℃ and be incubated 12 hours with the speed of 11 ℃/min, naturally cool to room temperature then, get sintered product; Sintered product is taken out, and being ground to meta particle diameter D50 is 10 microns, and then with deionized water wash and after 70 ℃ of dryings, namely obtaining chemical formula is Sr 2Ba 0.9SiO 5: 0.1Eu 2+The silicate red fluorescence powder.
Embodiment 4
1) according to Sr 0.5Ba 0.48SiO 3: 0.02Eu 2+The stoichiometric ratio of (x=0.02 in the chemical general formula, A=Sr and Ba) takes by weighing SrCO 3, BaCO 3, SiO 2And Eu 2O 3And place mortar to mix by the mode of grinding, place tube furnace then, at N 2And H 2Mixed atmosphere under (N 2With H 2Volume ratio be 5:1) be warming up to 1140 ℃ and be incubated 4h with the speed of 7.5 ℃/min, then naturally cool to room temperature, again product is taken out and grinds and cross 200 eye mesh screens, namely get Sr 0.5Ba 0.48SiO 3: 0.02Eu 2+Powder.
2) according to Sr 2.5Ba 0.48SiO 5: 0.02Eu 2+The stoichiometric ratio of (x=0.02 in the chemical general formula, A=Sr and Ba) takes by weighing Sr 0.5Ba 0.48SiO 3: 0.02Eu 2+Powder and SrO also place mortar to mix by the mode of grinding, and get mixture;
3) in mixture, add the H that accounts for mixture total mass 2% 3BO 3, mix, put into tube furnace then, at N 2And H 2Mixed atmosphere under (N 2With H 2Volume ratio be 9:1) be warming up to 1320 ℃ and be incubated 10 hours with the speed of 12.5 ℃/min, naturally cool to room temperature then, get sintered product; Sintered product is taken out, and being ground to meta particle diameter D50 is 12 microns, and then with deionized water wash and after 50 ℃ of dryings, namely obtaining chemical formula is Sr 2.5Ba 0.48SiO 5: 0.02Eu 2+The silicate red fluorescence powder.

Claims (10)

1. the preparation method of a silicate red fluorescence powder is characterized in that, may further comprise the steps:
1) according to chemical general formula A 1-xSiO 3: xEu 2+In the metering of each element chemistry than taking by weighing an A source, SiO 2And Eu 2O 3, mix, put into tube furnace then, at N 2And H 2Mixed atmosphere under be warming up to 1100～1150 ℃ and be incubated 3～6h, be down to room temperature then, get A 1-xSiO 3: xEu 2+Powder; 0.02≤x≤0.1 wherein, A is the mixture of Sr, Ba or Sr and Ba, an A source is the oxide compound of A, carbonate or the oxide compound of A and the mixture of carbonate of A;
2) according to chemical general formula A 3-xSiO 5: xEu 2+In the metering of each element chemistry than taking by weighing A 1-xSiO 3: xEu 2+Powder and the 2nd A source mix, and get mixture, and wherein 0.02≤x≤0.1, the two A source is SrO, SrCO 3, BaO or BaCO 3
3) in mixture, add the catalyzer that accounts for mixture total mass 1～5%, mix, put into tube furnace then, at N 2And H 2Mixed atmosphere under be warming up to 1300～1350 ℃ and be incubated 10～14h, be down to room temperature then, get sintered product; Sintered product washing back is dry, and getting chemical formula is A 3-xSiO 5: xEu 2+The silicate red fluorescence powder, wherein 0.02≤x≤0.1, and A 3-xSiO 5: xEu 2+In A be mixture or the Sr of Sr and Ba.
2. the preparation method of silicate red fluorescence powder according to claim 1, it is characterized in that: an A source is SrO, SrCO in the described step 1) 3, BaO, BaCO 3, SrO and BaO mixture, SrO and BaCO 3Mixture, SrCO 3Mixture or SrCO with BaO 3And BaCO 3Mixture.
3. the preparation method of silicate red fluorescence powder according to claim 1 is characterized in that: N in the described step 1) 2And H 2Mixed atmosphere in N 2With H 2Volume ratio be (3～5): 1.
4. the preparation method of silicate red fluorescence powder according to claim 1 is characterized in that: the heat-up rate when heating up in the described step 1) is 5～10 ℃/min.
5. the preparation method of silicate red fluorescence powder according to claim 1 is characterized in that: described step 1) and step 2) in to mix be that mode by grinding in mortar reaches.
6. the preparation method of silicate red fluorescence powder according to claim 1, it is characterized in that: the catalyzer in the described step 3) is H 3BO 3, NaF, SrF 2Or BaF 2
7. the preparation method of silicate red fluorescence powder according to claim 1 is characterized in that: N in the described step 3) 2And H 2Mixed atmosphere in N 2With H 2Volume ratio be (3～95): 1.
8. the preparation method of silicate red fluorescence powder according to claim 1 is characterized in that: the heat-up rate when heating up in the described step 3) is 10～12.5 ℃/min.
9. the preparation method of silicate red fluorescence powder according to claim 1 is characterized in that: to be milled to the meta particle diameter before washing earlier be 8～12 microns in the sintered product washing in the described step 3).
10. the preparation method of silicate red fluorescence powder according to claim 1 is characterized in that: the drying in the described step 3) is for 40～100 ℃ of oven dry down.
CN2013102646004A 2013-06-27 2013-06-27 Preparation method of silicate red fluorescent powder Pending CN103343003A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104212442A (en) * 2014-07-24 2014-12-17 昆明理工大学 Preparation method of fluorescent material used for orange-yellow-color LED
CN104774609A (en) * 2015-04-30 2015-07-15 中国科学院长春应用化学研究所 Long-afterglow luminescent material and preparation method thereof
CN116239160A (en) * 2023-03-16 2023-06-09 湖南钠能时代科技发展有限公司 Ternary sodium-electricity precursor coated and modified by polybasic silicate and preparation method thereof

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102191045A (en) * 2011-03-28 2011-09-21 彩虹集团公司 Preparation method of nitrogen oxide green fluorescent powder material
CN102191057A (en) * 2011-03-28 2011-09-21 彩虹集团公司 Method for optimizing crystalline form of silicate green fluorescent powder material
CN102250611A (en) * 2011-07-26 2011-11-23 彩虹集团公司 Silicate green fluorescent powder and preparation method thereof
CN102344810A (en) * 2011-07-26 2012-02-08 彩虹集团公司 Ce and Eu doping nitric oxide fluorescent powder and preparation method thereof
CN102533260A (en) * 2011-12-29 2012-07-04 彩虹集团公司 nitrogen oxide yellowgreen fluorescent powder for LED and preparation method for nitrogen oxide yellowgreen fluorescent powder
CN102627967A (en) * 2012-03-26 2012-08-08 彩虹集团公司 Nitrogen oxide blue fluorescent powder and preparation method thereof
CN102807858A (en) * 2012-07-25 2012-12-05 彩虹集团公司 Method for preparing orange nitrogen oxide phosphor material
CN102965102A (en) * 2012-10-31 2013-03-13 彩虹集团公司 Preparation method of silicate green fluorescent powder
CN103045236A (en) * 2013-01-21 2013-04-17 中国计量学院 A green phosphor powder of nitrogen oxides co-doped with Eu2+/M (M=Ce3+, mn2+, dy3+)

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102191045A (en) * 2011-03-28 2011-09-21 彩虹集团公司 Preparation method of nitrogen oxide green fluorescent powder material
CN102191057A (en) * 2011-03-28 2011-09-21 彩虹集团公司 Method for optimizing crystalline form of silicate green fluorescent powder material
CN102250611A (en) * 2011-07-26 2011-11-23 彩虹集团公司 Silicate green fluorescent powder and preparation method thereof
CN102344810A (en) * 2011-07-26 2012-02-08 彩虹集团公司 Ce and Eu doping nitric oxide fluorescent powder and preparation method thereof
CN102533260A (en) * 2011-12-29 2012-07-04 彩虹集团公司 nitrogen oxide yellowgreen fluorescent powder for LED and preparation method for nitrogen oxide yellowgreen fluorescent powder
CN102627967A (en) * 2012-03-26 2012-08-08 彩虹集团公司 Nitrogen oxide blue fluorescent powder and preparation method thereof
CN102807858A (en) * 2012-07-25 2012-12-05 彩虹集团公司 Method for preparing orange nitrogen oxide phosphor material
CN102965102A (en) * 2012-10-31 2013-03-13 彩虹集团公司 Preparation method of silicate green fluorescent powder
CN103045236A (en) * 2013-01-21 2013-04-17 中国计量学院 A green phosphor powder of nitrogen oxides co-doped with Eu2+/M (M=Ce3+, mn2+, dy3+)

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
LEI CHEN，等: "Suppressing the phase transformation and enhancing the orange luminescence of (Sr,Ba)3SiO5:Eu2+ for application in white LEDs", 《MATERIALS LETTERS》, vol. 106, 24 May 2013 (2013-05-24), pages 824 - 431 *
洪广言: "《稀土发光材料-基础与应用》", 30 April 2011, article "稀土发光材料制备化学" *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104212442A (en) * 2014-07-24 2014-12-17 昆明理工大学 Preparation method of fluorescent material used for orange-yellow-color LED
CN104774609A (en) * 2015-04-30 2015-07-15 中国科学院长春应用化学研究所 Long-afterglow luminescent material and preparation method thereof
CN116239160A (en) * 2023-03-16 2023-06-09 湖南钠能时代科技发展有限公司 Ternary sodium-electricity precursor coated and modified by polybasic silicate and preparation method thereof

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Application publication date: 20131009