CN1085718C - Preparation of fluorescent powder for dysprosium ion activating high voltage mercury lamp - Google Patents
Preparation of fluorescent powder for dysprosium ion activating high voltage mercury lamp Download PDFInfo
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- CN1085718C CN1085718C CN97121936A CN97121936A CN1085718C CN 1085718 C CN1085718 C CN 1085718C CN 97121936 A CN97121936 A CN 97121936A CN 97121936 A CN97121936 A CN 97121936A CN 1085718 C CN1085718 C CN 1085718C
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- fluorescent powder
- dysprosium
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- voltage mercury
- high voltage
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Abstract
The present invention belongs to fluorescent powder activated by dysprosium ions for high-voltage mercury lamps and a preparation method thereof. Vanadium yttrium phosphate is used as a substrate material, and dysprosium ions are used as active ions by the present invention. The fluorescent powder is prepared by sintering the raw materials at high temperature in the air. The luminous intensity of the fluorescent powder can be enhanced by partially replacing a VO4 tetrahedron group by a niobium oxygen tetrahedron group NbO4 of negative ion group of the fluorescent powder, and the degree of crystallinity of the fluorescent powder can be improved by using sodium carbonate as a fluxing agent. Because europium oxide which has the disadvantages of less quantity and high price is replaced by dysprosium oxide which has the advantages of large quantity and low price in China, the production cost of the fluorescent powder of the present invention can be reduced, and the application approach of dysprosium resources is widened.
Description
The invention belongs to the preparation method of fluorescent powder for dysprosium ion activating high voltage mercury lamp.
High voltage mercury lamp is a kind of lighting that is widely used at present, is mainly used in the illumination in road and other place.The principle of work of this kind light fixture is that the ultraviolet ray excited fluorescent material that is applied to the glass lamp housing inboard based on 365nm that utilizes the high-pressure mercury vapor discharge to be produced produces as seen luminous.Employed fluorescent RE powder mainly is europkium-activated vanadic acid yttrium and vanadium yttrium phosphate in high voltage mercury lamp at present.English Patent Brit.1,135,304 (C1.09k), General Electric Company discloses and has been entitled as " preparation that europium activates the vanadic acid yttrium "; It is that the feedstock production europium activates vanadic acid yttrium phosphor powder that this method has been reported with yttrium oxide, europium sesquioxide and Vanadium Pentoxide in FLAKES.United States Patent (USP) U.S.3,647,706 (C1.301-4p; C 09 k), people such as Lagos disclose and have been entitled as " preparation that europium activates vanadium yttrium phosphate fluorescent material "; It is that raw material prepares the method that europium activates lamp phosphor in 1200-1400 ℃ of calcination that this patent has been reported with yttrium oxide, europium sesquioxide, primary ammonium phosphate and ammonium vanadate.Though above-mentioned two kinds of fluorescent material all have preferable performance, owing to will use content rareness in rare-earth mineral, expensive europium sesquioxide and make the cost of this type of fluorescent material higher.The lamp phosphor that with the dysprosium is active ions also has report.United States Patent (USP) U.S.3 for example, 501,412 (C1.252-301.4; C 09 k), R.Ropp discloses the patent that is entitled as " activated by dysprosium rare-earth vanadate fluorescent material "; This method is a feedstock production geseous discharge lamp phosphor with rare earth oxide and Vanadium Pentoxide in FLAKES.Japanese Patent JP 02 28,283,[90 28,283] (C1.C09K11/83), K.Nakagawa discloses the patent that is entitled as " the white luminous fluorescent material of rare earth use for discharge lamp "; The described fluorescent material of this patent consist of Y
1-xDy
xV
1-yP
yO
4
The present invention finds by a large amount of experiment screenings, with niobium oxygen tetrahedron NbO
4Part replaces the vanadium oxygen tetrahedron VO in the activated by dysprosium vanadium yttrium phosphate
4Can significantly improve the absorptive character of fluorescent material, thereby improve the luminous intensity of fluorescent material largely intensity of activation; Do the degree of crystallinity that fusing assistant can improve fluorescent material with yellow soda ash.Compare with not containing the tetrahedral activated by dysprosium fluorescent material of niobium oxygen, mix NbO
4The luminous intensity of the fluorescent material of group can improve about 20%.Owing to used the europium sesquioxide that has replaced few amount and high price at the big inexpensive dysprosium oxide of China's amount,, also expanded new approach for the development and use of dysprosium oxide so the present invention can reduce the production cost of fluorescent material.
The objective of the invention is with the rare-earth oxidation dysprosium is the raw material of active ions, and the high temperature sintering in air such as yttrium oxide, Vanadium Pentoxide in FLAKES, Niobium Pentxoxide and primary ammonium phosphate that is equipped with respective numbers prepares the high-pressure mercury lamp phosphor.
The present invention at high temperature prepares the vanadium yttrium phosphate matrix compounds according to the principle of high temperature solid state reaction; Adopt the method for ionic replacement dysprosium ion and niobium oxygen tetrahedron to be introduced ruthenium ion and the tetrahedral case of vanadium oxygen in the vanadium yttrium phosphate matrix under the condition of high temperature by solid state reaction, thus the fluorescent material of preparation dysprosium ion activating.The ultraviolet ray based on 365nm that high-pressure mercury vapor discharge is produced is at first absorbed by the anionic group in the material, and then the mode of intensity of activation by the non-radiative energy transmission is transported to the dysprosium ion that occupies the ruthenium ion case and makes it be in excited state and produce white luminous.
The present invention presses following mixed with yttrium oxide, dysprosium oxide, Vanadium Pentoxide in FLAKES, Niobium Pentxoxide and primary ammonium phosphate:
Y
1-x(VO
4)
1-a-b(PO
4)
a(NbO
4)
b∶Dy
x
Wherein: 0＜x≤0.02,0＜a＜1.0,0＜b≤0.015 mixture through grind mix the back under the condition that an amount of yellow soda ash exists in 400 ℃ of calcinations 4 hours in air, after grinding again in 1200-1400 ℃ in air calcination 4-8 hour.Product is white powder fluorescent material after grinding, wash, drying.
Embodiment provided by the invention is as follows:
1. with 55.89 gram yttrium oxide, 40.38 gram Vanadium Pentoxide in FLAKESs, 5.75 gram primary ammonium phosphates, 0.80 gram Niobium Pentxoxide, 0.94 gram dysprosium oxide mixing, porphyrize; Add an amount of aqueous solution that contains 4.79 gram anhydrous sodium carbonates and 4.09 gram Vanadium Pentoxide in FLAKESs and further grind oven dry; Mixture was in 400 ℃ of calcinations 4 hours; Take out behind the porphyrize again in 1300 ℃ of calcinations 8 hours; Porphyrize after washing, oven dry promptly get and consist of Y
0.99(VO
4)
0.888(PO
4)
0.1(NbO
4)
0.012: Dy
0.01White fluorescent powder.Coated in the 250W with this fluorescent material, pressed down high voltage mercury lamp outward, luminous efficiency is respectively 23.001m/w and 50.401m/w.
2. with 1.123 gram yttrium oxide, 0.450 gram Vanadium Pentoxide in FLAKES, 0.575 gram primary ammonium phosphate, 0.007 gram Niobium Pentxoxide, 0.009 gram dysprosium oxide mixing, porphyrize; Add an amount of aqueous solution that contains 0.096 gram anhydrous sodium carbonate and 0.082 gram Vanadium Pentoxide in FLAKES and further grind oven dry; Mixture was in 400 ℃ of calcinations 4 hours; Take out behind the porphyrize again in 1200 ℃ of calcinations 6 hours; Porphyrize after washing, oven dry promptly get and consist of Y
0.995(VO
4)
0.495(PO
4)
0.5(NbO
4)
0.005: Dy
0.005White fluorescent powder.This fluorescent material all produces strong white luminous under the exciting of 365nm and 254nm mercury line.
3. with 1.107 gram yttrium oxide, 0.175 gram Vanadium Pentoxide in FLAKES, 0.920 gram primary ammonium phosphate, 0.037 gram dysprosium oxide mixing, porphyrize; Add an amount of aqueous solution that contains 0.096 gram anhydrous sodium carbonate and 0.082 gram Vanadium Pentoxide in FLAKES and further grind oven dry; Mixture was in 400 ℃ of calcinations 4 hours; Take out behind the porphyrize again in 1400 ℃ of calcinations 4 hours; Porphyrize after washing, oven dry promptly get and consist of Y
0.98(VO
4)
0.192(PO
4)
0.8(NbO
4)
0.008: Dy
0.02White fluorescent powder.This fluorescent material all produces strong white luminous under the exciting of 365nm and 254nm mercury line.
Claims (1)
1. the preparation method of a fluorescent powder for dysprosium ion activating high voltage mercury lamp is characterized in that yttrium oxide, dysprosium oxide, Vanadium Pentoxide in FLAKES, Niobium Pentxoxide and primary ammonium phosphate by following mixed:
Y
1-x(VO
4)
1-a-b(PO
4)
a(NbO
4)
b∶Dy
x
Wherein: 0＜x≤0.02,0＜a＜1.0,0＜b≤0.015
Mixture through grind mix the back under the condition that an amount of yellow soda ash exists in 400 ℃ of calcinations 4 hours in air, after grinding again in 1200-1400 ℃ in air calcination 4-8 hour.Product is white powder fluorescent material after grinding, wash, drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97121936A CN1085718C (en) | 1997-11-21 | 1997-11-21 | Preparation of fluorescent powder for dysprosium ion activating high voltage mercury lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97121936A CN1085718C (en) | 1997-11-21 | 1997-11-21 | Preparation of fluorescent powder for dysprosium ion activating high voltage mercury lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1218083A CN1218083A (en) | 1999-06-02 |
| CN1085718C true CN1085718C (en) | 2002-05-29 |
Family
ID=5176555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97121936A Expired - Fee Related CN1085718C (en) | 1997-11-21 | 1997-11-21 | Preparation of fluorescent powder for dysprosium ion activating high voltage mercury lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1085718C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100356503C (en) * | 2004-08-06 | 2007-12-19 | 于首成 | Electronic energy-saving health-care fluoresent lamp |
| CN102002363B (en) * | 2010-09-25 | 2013-07-31 | 西安理工大学 | Single matrix white light fluorescent powder for deep ultraviolet LED (Light Emitting Diode) and preparation method thereof |
| CN109988575B (en) * | 2019-04-28 | 2021-02-26 | 常州工程职业技术学院 | Eu (Eu)3+Ion-activated vanadium-phosphorus niobate red fluorescent powder, preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1146478A (en) * | 1995-06-28 | 1997-04-02 | 罗纳·布朗克化学公司 | Compound based rare-earth phosphate used as luminous material in plasma system |
-
1997
- 1997-11-21 CN CN97121936A patent/CN1085718C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1146478A (en) * | 1995-06-28 | 1997-04-02 | 罗纳·布朗克化学公司 | Compound based rare-earth phosphate used as luminous material in plasma system |
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|---|---|
| CN1218083A (en) | 1999-06-02 |
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