CN103849394A - Lanthanum gallate luminescent material and preparation method thereof - Google Patents
Lanthanum gallate luminescent material and preparation method thereof Download PDFInfo
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- CN103849394A CN103849394A CN201210499959.5A CN201210499959A CN103849394A CN 103849394 A CN103849394 A CN 103849394A CN 201210499959 A CN201210499959 A CN 201210499959A CN 103849394 A CN103849394 A CN 103849394A
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- luminescent material
- lanthanum gallate
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- cala
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Abstract
The invention belongs to the field of luminescent materials and discloses a lanthanum gallate luminescent material and a preparation method thereof. The lanthanum gallate luminescent material has a general molecular formula of CaLa1-xGa3-yO7: Dy<x><3+>, Sny; and in the general molecular formula, Sn is used as a doping element, x is >0 and <=0.2, and y is > 0 and <= 0.1. The lanthanum gallate luminescent material utilizes the Sn element and the Sn element can produce sensitization effects on rare earth ions in the lanthanum gallate luminescent material. Compared with a luminescent material without the Sn element, the lanthanum gallate luminescent material provided by the invention has greatly improved luminescence properties under the excitation condition of same emitted light wavelength. Therefore, the lanthanum gallate luminescent material has good luminescence properties.
Description
Technical field
The present invention relates to field of light emitting materials, relate in particular to a kind of preparation method of lanthanum gallate calcium luminescent material.
Background technology
Field Emission Display (FED) is a kind of flat panel display that has very much development potentiality.The operating voltage of field emission display is lower than the operating voltage of cathode tube (CRT), be conventionally less than 5kV, and working current density is relatively large, generally at 10～100 μ Acm
-2.Therefore, higher to the requirement of the luminescent powder for Field Emission Display, as to have better saturation, luminous efficiency under low voltage higher and under high current density without luminance saturation phenomenon etc.At present, the research of Field Emission Display luminescent powder is mainly concentrated on to two aspects: the one, utilize and improve existing cathode tube luminescent powder; The 2nd, find new luminescent material.Commercial cathodoluminescence powder, take sulfide as main, in the time being used for fabricating yard emission display screen, because sulphur wherein can react with Microamounts of Mo, silicon or germanium etc. in negative electrode, thereby having weakened its electron emission, and then has affected the performance of whole device.Exist potential using value in luminescent material Application Areas.
In the fluorescent material that feds adopts at present, there is a type oxide series fluorescence
Powder, gallate luminous material wherein, doping with rare-earth ions is luminous, has the advantages that stability is good, and still, the gallate luminous material luminous efficiency of preparing in prior art is not high, has limited its application in illumination and demonstration field.
Summary of the invention
The lanthanum gallate calcium luminescent material that provides a kind of luminous efficiency higher is provided problem to be solved by this invention.
Technical scheme of the present invention is as follows:
A kind of lanthanum gallate calcium luminescent material, its general molecular formula is: CaLa
1-xga
3-yo
7: Dy
x 3+, Sn
y; Wherein, Sn is doped element, and the span of x is 0 < x≤0.2, and the span of y is 0 < y≤0.1; Preferably, the span of x is 0.001≤x≤0.1, and the span of y is 0.005≤y≤0.05.
The present invention also provides the preparation method of above-mentioned lanthanum gallate calcium luminescent material, comprises the steps:
According to molecular formula CaLa
1-xga
3-yo
7: Dy
x 3+, Sn
yin the metering of each element chemistry ratio, respectively compound and the SnO to contain Ca, La, Ga and Dy
2for raw material, by even all raw material ground and mixed, process 1 ~ 8h at 900 ~ 1400 ℃ of temperature lower calcinations, be cooled to room temperature, the molecular formula that obtains Sn and be doped element is CaLa
1-xga
3-yo
7: Dy
x 3+, Sn
ylanthanum gallate calcium luminescent material;
Wherein, the span of x is 0 < x≤0.2, and the span of y is 0 < y≤0.1.
The preparation method of described lanthanum gallate calcium luminescent material, preferably, the compound of Ca, La, Ga, Dy is respectively the oxide compound, carbonate, oxalate, nitrate or the muriate that contain Ca, La, Ga, Dy.
The preparation method of described lanthanum gallate calcium luminescent material, preferably, the span of x is 0.001≤x≤0.1, the span of y is 0.005≤y≤0.05.
The preparation method of described lanthanum gallate calcium luminescent material, preferably, when described calcination processing, calcining temperature is 900 ~ 1200 ℃, calcination time is 2 ~ 6h.
Lanthanum gallate calcium luminescent material of the present invention, introduce Sn element, sensibilized by Sn element to luminescent material Rare Earth Ion, compared with not introducing the luminescent material of Sn element, the luminescent properties of this luminescent material under the shooting conditions of same transmit optical wavelength is greatly improved, and therefore luminescent properties is good.
Preparation method's processing step of the present invention is few, and technique is simple, with low cost, can be widely used in the manufacture of luminescent material, and the lanthanum gallate calcium luminescent material obtaining do not introduce other impurity, and quality is high.
Accompanying drawing explanation
Fig. 1 is that lanthanum gallate calcium luminescent material prepared by the embodiment of the present invention 4 is the luminescent spectrum comparison diagram under the cathode-ray exciting under 1.5KV with contrast luminescent material at acceleration voltage; Wherein, curve 1 is lanthanum gallate calcium luminescent material prepared by embodiment 4: the CaLa of doping Sn element
0.95ga
2.98o
7: Dy
0.05 3+, Sn
0.02the luminescent spectrum of luminescent material, curve 2 is contrast luminescent materials: the CaLa of the Sn element that do not adulterate
0.95ga
2.98o
7: Dy
0.05 3+the luminescent spectrum of luminescent material.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in further detail.
Embodiment 1:CaLa
0.9ga
2.95o
7: Dy
0.1 3+, Sn
0.05:
Preparation method: adopt CaCl
2, LaCl
3, GaCl
3, DyCl
3and SnO
2for main raw material, take CaCl
20.4439g, LaCl
30.8829g, GaCl
32.0777g, DyCl
30.1075g, SnO
20.0301g, mixes above-mentioned raw materials to be placed in High Temperature Furnaces Heating Apparatus, at 900 ℃, calcines 6h, and calcinate cools to room temperature with the furnace, and obtained product is ground to powder, and obtaining chemical formula is CaLa
0.9ga
2.95o
7: Dy
0.1 3+, Sn
0.05lanthanum gallate calcium luminescent material.
Embodiment 2:CaLa
0.999ga
2.9o
7: Dy
0.001 3+, Sn
0.1
Preparation method: adopt CaCO
3, La
2(CO
3)
3, Ga
2(CO
3)
3, Dy
2(CO
3)
3and SnO
2for main raw material, take CaCO
30.4004g, La
2(CO
3)
30.9147g, Ga
2(CO
3)
31.8529g, Dy
2(CO
3)
30.0010g, SnO
20.0602g, mixes above-mentioned raw materials to be placed in High Temperature Furnaces Heating Apparatus, at 1200 ℃, calcines 2h, and calcinate cools to room temperature with the furnace, and obtained product is ground to powder, and obtaining chemical formula is CaLa
0.999ga
2.9o
7: Dy
0.001 3+, Sn
0.1lanthanum gallate calcium luminescent material.
Embodiment 3:CaLa
0.8ga
2.999o
7: Dy
0.2 3+, Sn
0.001:
Preparation method: adopt Ca (NO
3)
2, La (NO
3)
3, Ga (NO
3)
3, Dy (NO
3)
3and SnO
2for main raw material, take Ca (NO
3)
20.6563g, La (NO
3)
31.0397g, Ga (NO
3)
33.0678g, Dy (NO
3)
30.2788g, SnO
20.0006g, mixes above-mentioned raw materials to be placed in High Temperature Furnaces Heating Apparatus, at 1400 ℃, calcines 1h, and calcinate cools to room temperature with the furnace, and obtained product is ground to powder, and obtaining chemical formula is CaLa
0.8ga
2.999o
7: Dy
0.2 3+, Sn
0.001lanthanum gallate calcium luminescent material.
Embodiment 4:CaLa
0.95ga
2.98o
7: Dy
0.05 3+, Sn
0.02:
Preparation method: adopt CaO, La
2o
3, Ga
2o
3, Dy
2o
3and SnO
2for main raw material, take CaO0.2243g, La
2o
30.6190g, Ga
2o
31.1171g, Dy
2o
30.0373g, SnO
20.0120g, mixes above-mentioned raw materials to be placed in High Temperature Furnaces Heating Apparatus, at 1100 ℃, calcines 5h, and calcinate cools to room temperature with the furnace, and obtained product is ground to powder, and obtaining chemical formula is CaLa
0.95ga
2.98o
7: Dy
0.05 3+, Sn
0.02lanthanum gallate calcium luminescent material.
Fig. 1 is that lanthanum gallate calcium luminescent material prepared by the embodiment of the present invention 4 is the luminescent spectrum comparison diagram under the cathode-ray exciting under 1.5KV with contrast luminescent material at acceleration voltage; Wherein, curve 1 is lanthanum gallate calcium luminescent material prepared by embodiment 4: the CaLa of doping Sn element
0.95ga
2.98o
7: Dy
0.05 3+, Sn
0.02the luminescent spectrum of luminescent material, curve 2 is contrast luminescent materials: the CaLa of the Sn element that do not adulterate
0.95ga
2.98o
7: Dy
0.05 3+the luminescent spectrum of luminescent material.
As can be seen from Figure 1,, at the emission peak at 575nm place, after doping Sn element, the luminous intensity of the luminous intensity of luminescent material before not adulterating strengthened 27%.
Embodiment 5:CaLa
0.85ga
2.995o
7: Dy
0.15 3+, Sn
0.005:
Preparation method: adopt CaC
2o
4, La2 (C2O4) 3, Ga
2o
3, and SnO
2for main raw material, take CaC
2o
40.5124g, La
2(C
2o
4)
30.8225g, Ga
2(C
2o
4)
32.1295g, Dy
2(C
2o
4)
30.1623g, SnO
20.0030g, mixes above-mentioned raw materials to be placed in High Temperature Furnaces Heating Apparatus, at 900 ℃, calcines 8h, and calcinate cools to room temperature with the furnace, and obtained product is ground to powder, and obtaining chemical formula is CaLa
0.85ga
2.995o
7: Dy
0.15 3+, Sn
0.005gallate luminous material.
Embodiment 6:CaLa
0.92ga
2.92o
7: Dy
0.08 3+, Sn
0.08:
Preparation method: adopt CaCO
3, La
2o
3, Ga
2o
3, Dy
2o
3and SnO
2for main raw material, take CaCO
30.4004g, La
2o
30.5995g, Ga
2o
31.0946g, Dy
2o
30.0597g, SnO
20.0482g, mixes above-mentioned raw materials to be placed in High Temperature Furnaces Heating Apparatus, at 1300 ℃, calcines 3h, and calcinate cools to room temperature with the furnace, and obtained product is ground to powder, and obtaining chemical formula is CaLa
0.92ga
2.92o
7: Dy
0.08 3+, Sn
0.08gallate luminous material.
Should be understood that, the above-mentioned statement for preferred embodiment of the present invention is comparatively detailed, can not therefore think the restriction to scope of patent protection of the present invention, and scope of patent protection of the present invention should be as the criterion with claims.
Claims (6)
1. a lanthanum gallate calcium luminescent material, is characterized in that, its general molecular formula is: CaLa
1-xga
3-yo
7: Dy
x 3+, Sn
y; Wherein, Sn is doped element, and the span of x is 0 < x≤0.2, and the span of y is 0 < y≤0.1.
2. lanthanum gallate calcium luminescent material according to claim 1, is characterized in that, the span of x is 0.001≤x≤0.1, and the span of y is 0.005≤y≤0.05.
3. a preparation method for lanthanum gallate calcium luminescent material, is characterized in that, comprises the steps:
According to molecular formula CaLa
1-xga
3-yo
7: Dy
x 3+, Sn
yin the metering of each element chemistry ratio, respectively compound and the SnO to contain Ca, La, Ga and Dy
2for raw material, by even all raw material ground and mixed, process 1 ~ 8h at 900 ~ 1400 ℃ of temperature lower calcinations, be cooled to room temperature, the molecular formula that obtains Sn and be doped element is CaLa
1-xga
3-yo
7: Dy
x 3+, Sn
ylanthanum gallate calcium luminescent material;
Wherein, the span of x is 0 < x≤0.2, and the span of y is 0 < y≤0.1.
4. the preparation method of lanthanum gallate calcium luminescent material according to claim 3, is characterized in that, the compound of Ca, La, Ga, Dy is respectively the oxide compound, carbonate, oxalate, nitrate or the muriate that contain Ca, La, Ga, Dy.
5. the preparation method of lanthanum gallate calcium luminescent material according to claim 3, is characterized in that, the span of x is 0.001≤x≤0.1, and the span of y is 0.005≤y≤0.05.
6. the preparation method of lanthanum gallate calcium luminescent material according to claim 3, is characterized in that, when described calcination processing, calcining temperature is 900 ~ 1200 ℃, and calcination time is 2 ~ 6h.
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|---|---|---|---|
| CN201210499959.5A CN103849394A (en) | 2012-11-29 | 2012-11-29 | Lanthanum gallate luminescent material and preparation method thereof |
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|---|---|---|---|
| CN201210499959.5A CN103849394A (en) | 2012-11-29 | 2012-11-29 | Lanthanum gallate luminescent material and preparation method thereof |
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|---|---|
| CN103849394A true CN103849394A (en) | 2014-06-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI717185B (en) * | 2019-01-23 | 2021-01-21 | 億光電子工業股份有限公司 | Near-infrared phosphor, optoelectronic device comprising the same, and method of preparing optoelectronic device |
| CN117363354A (en) * | 2023-09-20 | 2024-01-09 | 枣庄学院 | Tm3+ regulated dysprosium activated lanthanum calcium gallate white light fluorescent powder and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000034479A (en) * | 1998-07-17 | 2000-02-02 | Kasei Optonix Co Ltd | Rare earth composite oxide phosphor |
| CN1729268A (en) * | 2002-12-20 | 2006-02-01 | 丰田合成株式会社 | Luminescent body and optical device including the same |
-
2012
- 2012-11-29 CN CN201210499959.5A patent/CN103849394A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000034479A (en) * | 1998-07-17 | 2000-02-02 | Kasei Optonix Co Ltd | Rare earth composite oxide phosphor |
| CN1729268A (en) * | 2002-12-20 | 2006-02-01 | 丰田合成株式会社 | Luminescent body and optical device including the same |
Non-Patent Citations (1)
| Title |
|---|
| 赵文玉等: "CaLaGa3O7:Dy3+荧光粉的光致和阴极射线发光性能", 《科学通报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI717185B (en) * | 2019-01-23 | 2021-01-21 | 億光電子工業股份有限公司 | Near-infrared phosphor, optoelectronic device comprising the same, and method of preparing optoelectronic device |
| CN117363354A (en) * | 2023-09-20 | 2024-01-09 | 枣庄学院 | Tm3+ regulated dysprosium activated lanthanum calcium gallate white light fluorescent powder and preparation method and application thereof |
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Application publication date: 20140611 |