CN102134489A - Borate luminescent material and preparation method thereof - Google Patents

Borate luminescent material and preparation method thereof Download PDF

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Publication number
CN102134489A
CN102134489A CN2010101007847A CN201010100784A CN102134489A CN 102134489 A CN102134489 A CN 102134489A CN 2010101007847 A CN2010101007847 A CN 2010101007847A CN 201010100784 A CN201010100784 A CN 201010100784A CN 102134489 A CN102134489 A CN 102134489A
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source compound
light emitting
luminescent material
borate material
earth metal
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周明杰
刘军
梁小芳
廖秋荣
田梓峰
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Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
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Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
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Abstract

The invention relates to the technical field of luminescent materials, and provides a borate luminescent material which comprises a compound disclosed as the following chemical formula: Y[2-x-y]Gd[x]Tb[y]M[3]B[4]O[12], wherein x=0.01-1.2, y=0.01-0.6, and M is an alkaline earth metal element. The luminescent material has the advantages of favorable vacuum ultraviolet absorptivity, stable physicochemical characteristics, and high capabilities for resisting vacuum ultraviolet radiation and ion bombardment; and meanwhile, due to the sensitization action of Gd<3+> on Tb<3+>, the luminescent intensity and luminescent efficiency of the Tb<3+> are enhanced, and the vacuum ultraviolet absorptivity of the luminescent material is enhanced. In addition, the invention also provides a method for preparing the borate luminescent material.

Description

Light emitting borate material and preparation method thereof
Technical field
The invention belongs to the luminescent material technical field, be specifically related to a kind of light emitting borate material and preparation method thereof.
Background technology
Illumination and display unit have become one of luminescent device of using always the most in the middle of people's daily life, and plasma flat-plate shows that (Plasma Display Panel is hereinafter to be referred as PDP) or non-mercury florescent lamp are exactly wherein a kind of.In these luminescent devices, the performance of luminescent material is its luminescent properties of decision and efficient key factor.As everyone knows, the red, green, blue luminescent material is to study three-color light-emitting material the most widely.
At present, commercial luminescent material mainly contains red illuminating material Y 2O 3: Eu 3+, (Y, Gd) BO 3: Eu 3+, green luminescent material Zn 2SiO 4: Mn 2+, BaAl 12O 19: Mn 2+With blue emitting material Y 2SiO 5: Ce 3+, LaPO 4: Tm 3+, BaMgAl 10O 17: Eu 2+Wherein, for Zn 2SiO 4: Mn 2+And BaAl 12O 19: Mn 2+, they are with Mn 2+As luminescence center, because Mn 2+Spin forbidden 4T 1→ 6A 1Emission, its twilight sunset overlong time is with Zn 2SiO 4: Mn 2+Be example, generally at 10-15ms, significant adverse is in the demonstration of dynamic menu.For PDP, the time of persistence of vacuum-ultraviolet light (VUV) fluorescent material that uses is longer at present, because human eye is to about 5ms of persistence of vision time of motion video, be good the time of persistence of the VUV fluorescent material that this requirement is used to show between 1～5ms, but PDP uses Zn always with the VUV green emitting phosphor at present 2SiO 4: its time of persistence of Mn about 10～15ms, more much bigger than rational time of persistence, this can produce conditions of streaking when just having caused PDP to show motion video.Though pass through Mn 2+The raising of ion doping concentration can reduce time of persistence, and still, luminous intensity decreases very fast.Therefore, the new luminescent material of exploitation is extremely urgent.
Summary of the invention
In view of this, provide the light emitting borate material of a kind of luminous efficiency height, good stability, and a kind of preparation technology simply reaches the low preparation light emitting borate material method of cost.
A kind of light emitting borate material, it comprises the compound of following chemical formulation: Y 2-x-yGd xTb yM 3B 4O 12, wherein, x=0.01～1.2, y=0.01～0.6, M is an alkali earth metal.
And, a kind of preparation light emitting borate material method, it comprises the steps:
Choose source compound, the Y of alkaline-earth metal ions 3+Source compound, Gd 3+Source compound, Tb 3+Source compound and B 4O 12 12-Source compound, each source compound is according to chemical formula Y 2-x-yGd xTb yM 3B 4O 12In mole metering between each element than choosing, wherein, x=0.01～1.2, y=0.01～0.6, M is an alkali earth metal;
With each source compound ground and mixed;
Mixture is carried out calcination processing, obtain described light emitting borate material after the cooling.
In above-mentioned light emitting borate material, adopt rear-earth-doped Y 3+, Gd 3+And Tb 3+The Y that mixes altogether 2-x-yGd xTb yM 3B 4O 12Luminescent material, there is not the twilight sunset influence basically in it.This luminescent material is with Y 2M 3B 4O 12Be luminous host, it has good vacuum ultraviolet (VUV) receptivity, stable physics and chemical property and the good ability of vacuum-resistant ultraviolet radiation and anti-ion bombardment.Gd mixes in this matrix 3+And Tb 3+Ion, on the one hand, Tb 3+The feature transition 5D 4→ 7F 5Meeting transmitting green light, spin coupling make it to have the short sunset glow time, and cancellation concentration are also high, even higher Tb to the shielding of spin forbidden 3+Doping content can not reduce luminous intensity yet, and is obviously excellent in traditional Mn 2+Doped luminescent material.On the other hand, Gd 3+Ion can sensitization Tb 3+Ion not only improves Tb 3+Luminous intensity and luminous efficiency, and improve the receptivity of luminescent material to vacuum-ultraviolet light.In above-mentioned preparation method, adopt less processing step, for example to adopt and grind and calcination processing, these technological operations are easier, and are lower to the processing condition requirement, thereby cost is lower, helps suitability for industrialized production and application.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the Y of the embodiment of the invention 4 1.7Gd 0.2Tb 0.1Ba 3B 4O 12The XRD figure of luminescent material and standard card 48-0307 (Y 2Ba 3B 4O 12) figure;
Fig. 2 is the Y of the embodiment of the invention 3 1.6Gd 0.3Tb 0.1Ba 3B 4O 12The exciting light spectrogram of luminescent material, supervisory wavelength are 543nm;
Fig. 3 is the Y of the embodiment of the invention 3 1.6Gd 0.3Tb 0.1Ba 3B 4O 12The emmission spectrum figure of luminescent material, excitation wavelength is 172nm;
Fig. 4 is the Y of the embodiment of the invention 3 1.6Gd 0.3Tb 0.1Ba 3B 4O 12The twilight sunset life test figure of luminescent material;
Fig. 5 is the preparation light emitting borate material method flow diagram of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The light emitting borate material of the embodiment of the invention comprises the compound of following chemical formulation: Y 2-x-yGd xTb yM 3B 4O 12, wherein, x=0.01～1.2, y=0.01～0.6, M is an alkali earth metal.
Particularly, the span of x and y is preferably respectively: x=0.2～0.8, and y=0.1～0.4, alkali earth metal M is preferably at least a among Ca, Sr, the Ba.More preferably, alkali earth metal M is the combination of at least two kinds of elements among Ca, Sr, the Ba, and, mix than the luminescent properties that can improve product by changing Ca, Sr and Ba ionic.
Above-mentioned luminescent material is with Y 2M 3B 4O 12Be luminous host, it has the boron oxygen tetrahedron group, this group all has stronger absorption at the vacuum ultraviolet (VUV) wave band, thereby has good vacuum ultraviolet (VUV) receptivity, stable physics and chemical property and the good ability of vacuum-resistant ultraviolet radiation and anti-ion bombardment.
With the luminescent material in the specific embodiment is example, sees also Fig. 1, is Y among the following embodiment 4 1.7Gd 0.2Tb 0.1Ba 3B 4O 12The XRD figure of luminescent material and standard card 48-0307 (Y 2Ba 3B 4O 12Standard x RD figure) figure.As seen from the figure, Y 1.7Gd 0.2Tb 0.1Ba 3B 4O 12Luminescent material conforms to substantially with the various characteristic peaks of standard card 48-0307 figure, and Y is described 1.7Gd 0.2Tb 0.1Ba 3B 4O 12In have Y 2Ba 3B 4O 12Basic framework, with Y 2M 3B 4O 12Be luminous host, doping Gd 3+And Tb 3+Ionic replacement Y 3+Ion does not change the crystalline structure of matrix.
The luminescence mechanism of this luminescent material is: under the vacuum ultraviolet (VUV) optical excitation, luminous host is directly given Tb with transmission ofenergy after the vacuum ultraviolet (VUV) light intensity is absorbed on the one hand 3+Carry out luminous; Pass through Gd on the other hand 3+Ionic sensibilized and oneself give Tb in the f-f of VUV wave band transition with transmission ofenergy 3+Ion strengthens Tb 3+The ionic luminous intensity.
With the luminescent material in the specific embodiment is example, specifically as shown in Figure 2, and Y among the embodiment 3 below showing 1.6Gd 0.3Tb 0.1Ba 3B 4O 12The exciting light spectrogram of luminescent material, supervisory wavelength are 543nm.At first, B 4O 12 12-Absorb the vacuum-ultraviolet light about the 172-210nm scope, diagram can find out that absorption peak is quite wide, illustrate the absorption region of vacuum-ultraviolet light wide, to the utilization ratio height of vacuum-ultraviolet light.Then, B 4O 12 12-Most of transmission ofenergy is given next-door neighbour's Tb 3+And comparatively contiguous Gd 3+, utilize Tb again 3+F-d transition and Gd 3+The f-f transition, finally a wide excitation peak occurs and Gd about 275nm, occurred at 220nm～250nm 3+The feature excitation peak.In conjunction with supervisory wavelength is 543nm, and Gd is described 3+And Tb 3+Between have transmission ofenergy, can improve Tb 3+Luminous intensity.In addition, Gd 3+From also having the f-f transition in 172-210nm, promptly also can absorb vacuum-ultraviolet light, utilize Gd 3+And Tb 3+Between transmission ofenergy, further improve receptivity and the Tb of luminescent material to vacuum-ultraviolet light 3+Luminous intensity.
See also Fig. 3, be Y among the following embodiment 3 1.6Gd 0.3Tb 0.1Ba 3B 4O 12Y in luminescent material and the Comparative Examples 1.9Tb 0.1Ba 3B 4O 12The emmission spectrum figure a and the b of luminescent material, excitation wavelength is 172nm.As seen from the figure, Tb 3+Wavelength of transmitted light belongs to visible region between 450-650nm, main emission peak is positioned at about 543nm, is green emitting.Contrast emmission spectrum figure a of two kinds of luminescent materials and b as can be seen, Y in the diagram 1.6Gd 0.3Tb 0.1Ba 3B 4O 12Emitted luminescence intensity apparently higher than the Gd that do not mix 3+Luminescent material.And, Gd appears 3+The emmission spectrum of self, the diagram wavelength of transmitted light is 311nm.By regulating Gd 3+And Tb 3+Doping, utilize Gd 3+To Tb 3+Sensibilized, can be Tb with the phototransformation at 311nm place 3+Luminous, further improve Tb 3+Luminous intensity.In view of this, it is 0.2～0.8 that the present invention selects the x span, and the span of y is 0.1～0.4.
See also Fig. 4, be Y among the following embodiment 3 1.6Gd 0.3Tb 0.1Ba 3B 4O 12The twilight sunset life test figure of luminescent material.As seen from the figure, the decay of the luminous intensity of this luminescent material is very fast, through calculating its twilight sunset life-span τ=2.32ms, is significantly less than Mn 2+The twilight sunset life-span of ion doping luminescent material is (as Zn 2SiO 4: Mn 2+, about 10-15ms), and at present the time of persistence of display requirement luminescent material be good between 1～5ms, the complete realistic demand of the luminescent material of present embodiment.Therefore, the twilight sunset life-span of this luminescent material is shorter, and cancellation concentration height makes its influence that does not have twilight sunset basically, helps being applied to that plasma flat-plate shows or fields such as non-mercury florescent lamp as green luminescent material.
Therefore, the luminescent material in the foregoing description has the following advantages at least:
A, with commercial BaAl 12O 19: Mn compares, and the luminescent material fluorescence lifetime of the embodiment of the invention is short, for example Y 1.6Gd 0.3Tb 0.1Ba 3B 4O 12Fluorescence lifetime be 2.32ms.
Gd in the luminescent material of B, present embodiment 3+Ion not only can improve the luminous intensity of luminescent material as sensitizing agent, and helps its absorption to vacuum-ultraviolet light.
In the luminescent material of C, present embodiment, mix than the luminescent properties that can improve product by changing Ca, Sr and Ba ionic.
See also Fig. 5, the above-mentioned method for preparing light emitting borate material comprises the steps:
S01: choose alkaline-earth metal ions M 2+Source compound, Y 3+Source compound, Gd 3+Source compound and Tb 3+Source compound and B 4O 12 12-Source compound, each source compound is according to chemical formula Y 2-x-yGd xTb yM 3B 4O 12In mole metering between each element than choosing, wherein, x=0.01～1.2, y=0.01～0.6, M is an alkali earth metal;
S02: with each source compound ground and mixed;
S03: mixture is carried out calcination processing, obtain described light emitting borate material after the cooling.
In step S01, alkaline-earth metal ions M 2+Source compound can be at least a in its carbonate, oxyhydroxide, the oxalate, purity is preferably analytical pure; Y 3+Source compound, Gd 3+Source compound and Tb 3+Source compound be respectively at least a in its oxide compound, muriate, nitrate, carbonate, the oxalate, purity is preferably more than the 4N; B 4O 12 12-Source compound be at least a in boron oxide or the boric acid, purity is preferably analytical pure.The span of x and y is preferably respectively: x=0.2～0.8, and y=0.1～0.4, alkali earth metal M is preferably at least a among Ca, Sr, the Ba, the combination of at least two kinds of elements among Ca, Sr, the Ba more preferably.Preferably, B 4O 12 12-Source compound can be between the element of relative chemical formula the molar fraction metering than excessive, for example, can be by the metering of mole mark than excessive 5%～30%.
In step S02, each source compound fully grinds in agate mortar, and it is mixed.
Calcination processing among the step S03 can comprise following process: with the precalcining 1～6 hour under 400～800 ℃ of temperature of the source compound of ground and mixed, again in 800～1300 ℃ of temperature lower calcinations 2～12 hours.Preferably, the precalcining temperature is 600～800 ℃, and the precalcining time is 2-4 hour; Calcining temperature is preferably 900-1200 ℃, and calcination time is 4-8 hour.In addition, can be in reducing atmosphere, to carry out during calcining, reducing atmosphere can be but be not limited at least a in the following atmosphere:
1) gas mixture of nitrogen and hydrogen, its volume ratio as can for but be not limited to 90: 10 or 95: 5;
2) pure hydrogen;
3) reduction carbon dust.
By the step of foregoing description as can be known, this method does not need the technology of additional complexity, and each step is simple to operate, and condition also realizes easily, and is pollution-free and be easy to control, helps suitability for industrialized production and application.
Below illustrate various suitable composition of light emitting borate material and preparation method thereof by a plurality of embodiment and Comparative Examples, with and aspect such as performance.
Embodiment 1
Take by weighing lime carbonate CaCO 33.0027g, boric acid H 3BO 3(2.9680g excessive 20%), yttrium oxide Y 2O 31.8065g, terbium sesquioxide Tb 4O 70.1869g and gadolinium sesquioxide Gd 2O 30.5437g after placing agate mortar fully to grind, put into corundum crucible at 800 ℃ of following pre-burning 4h, naturally cool to room temperature then, take out once more and fully grind.At last, in reducing atmosphere, the pre-burning product after grinding is calcined 4h down at 1000 ℃, naturally cool to room temperature, taking-up promptly gets white powder shaped Y after grinding 1.6Gd 0.3Tb 0.1Ca 3B 4O 12Green luminescent material.
Embodiment 2
Take by weighing Strontium carbonate powder SrCO 34.4289g, boric acid H 3BO 3(2.9680g excessive 20%), yttrium oxide Y 2O 31.8065g, terbium sesquioxide Tb 4O 70.1869g and gadolinium sesquioxide Gd 2O 30.5437g after placing agate mortar fully to grind, put into corundum crucible at 800 ℃ of following pre-burning 4h, naturally cool to room temperature then, take out once more and fully grind.At last, in reducing atmosphere, the pre-burning product after grinding is calcined 5h down at 1050 ℃, naturally cool to room temperature, taking-up promptly gets white powder shaped Y after grinding 1.6Gd 0.3Tb 0.1Sr 3B 4O 12Green luminescent material.
Embodiment 3
Take by weighing barium carbonate BaCO 35.9202g, boric acid H 3BO 3(2.9680g excessive 20%), yttrium oxide Y 2O 31.8065g, terbium sesquioxide Tb 4O 70.1869g and gadolinium sesquioxide Gd 2O 30.5437g after placing agate mortar fully to grind, put into corundum crucible at 700 ℃ of following pre-burning 4h, naturally cool to room temperature then, take out once more and fully grind.At last, in reducing atmosphere, the pre-burning product after grinding is calcined 5h down at 900 ℃, naturally cool to room temperature, taking-up promptly gets white powder shaped Y after grinding 1.6Gd 0.3Tb 0.1Ba 3B 4O 12Green luminescent material.
Embodiment 4
Take by weighing barium carbonate BaCO 35.9202g, boric acid H 3BO 3(2.9680g excessive 20%), yttrium oxide Y 2O 31.9194g, terbium sesquioxide Tb 4O 70.1869g and gadolinium sesquioxide Gd 2O 30.3625g after placing agate mortar fully to grind, put into corundum crucible at 700 ℃ of following pre-burning 4h, naturally cool to room temperature then, take out once more and fully grind.At last, in reducing atmosphere, the pre-burning product after grinding is calcined 5h down at 900 ℃, naturally cool to room temperature, taking-up promptly gets white powder shaped Y after grinding 1.7Gd 0.2Tb 0.1Ba 3B 4O 12Green luminescent material.
Embodiment 5
Take by weighing barium carbonate BaCO 35.9202g, boric acid H 3BO 3(2.9680g excessive 20%), yttrium oxide Y 2O 32.0323g, terbium sesquioxide Tb 4O 70.1869g and gadolinium sesquioxide Gd 2O 30.1812g after placing agate mortar fully to grind, put into corundum crucible at 700 ℃ of following pre-burning 4h, naturally cool to room temperature then, take out once more and fully grind.At last, in reducing atmosphere, the pre-burning product after grinding is calcined 5h down at 900 ℃, naturally cool to room temperature, taking-up promptly gets white powder shaped Y after grinding 1.8Gd 0.1Tb 0.1Ba 3B 4O 12Green luminescent material.
Embodiment 6
Take by weighing barium carbonate BaCO 35.9202g, boric acid H 3BO 3(2.9680g excessive 20%), yttrium oxide Y 2O 31.2420g, terbium sesquioxide Tb 4O 70.7477g and gadolinium sesquioxide Gd 2O 30.9062g after placing agate mortar fully to grind, put into corundum crucible at 600 ℃ of following pre-burning 4h, naturally cool to room temperature then, take out once more and fully grind.At last, in reducing atmosphere, the pre-burning product after grinding is calcined 3h down at 900 ℃, naturally cool to room temperature, taking-up promptly gets white powder shaped Y after grinding 1.1Gd 0.5Tb 0.4Ba 3B 4O 12Green luminescent material.
Embodiment 7
Take by weighing barium carbonate BaCO 35.9202g, boric acid H 3BO 3(2.9680g excessive 20%), yttrium oxide Y 2O 30.9032g, terbium sesquioxide Tb 4O 70.9346g and gadolinium sesquioxide Gd 2O 31.2687g after placing agate mortar fully to grind, put into corundum crucible at 700 ℃ of following pre-burning 4h, naturally cool to room temperature then, take out once more and fully grind.At last, in reducing atmosphere, the pre-burning product after grinding is calcined 5h down at 860 ℃, naturally cool to room temperature, taking-up promptly gets white powder shaped Y after grinding 0.8Gd 0.7Tb 0.5Ba 3B 4O 12Green luminescent material.
Embodiment 8
Take by weighing lime carbonate CaCO 32.8526g, Strontium carbonate powder SrCO 30.2214g, boric acid H 3BO 3(2.9680g excessive 20%), yttrium oxide Y 2O 31.8065g, terbium sesquioxide Tb 4O 70.1869g and gadolinium sesquioxide Gd 2O 30.5437g after placing agate mortar fully to grind, put into corundum crucible at 800 ℃ of following pre-burning 4h, naturally cool to room temperature then, take out once more and fully grind.At last, in reducing atmosphere, the pre-burning product after grinding is calcined 4h down at 1000 ℃, naturally cool to room temperature, taking-up promptly gets white powder shaped Y after grinding 1.6Gd 0.3Tb 0.1Ca 2.85Sr 0.15B 4O 12Green luminescent material.Luminous intensity is found after tested, and the luminous intensity of the luminescent material of present embodiment 8 is higher than the luminescent material about 10% of embodiment 1.
Embodiment 9
Take by weighing barium carbonate BaCO 35.6242g, Strontium carbonate powder SrCO 30.2214g, boric acid H 3BO 3(2.9680g excessive 20%), yttrium oxide Y 2O 30.2258g, terbium sesquioxide Tb 4O 71.1214g and gadolinium sesquioxide Gd 2O 32.1748g after placing agate mortar fully to grind, put into corundum crucible at 600 ℃ of following pre-burning 5h, naturally cool to room temperature then, take out once more and fully grind.At last, in reducing atmosphere, the pre-burning product after grinding is calcined 4h down at 1100 ℃, naturally cool to room temperature, taking-up promptly gets white powder shaped Y after grinding 0.2Gd 1.2Tb 0.6Ba 2.85Sr 0.15B 4O 12Green luminescent material.Luminous intensity is found after tested, and the luminous intensity of the luminescent material of present embodiment 9 is higher than the luminescent material about 10% of embodiment 1.
Embodiment 10
Take by weighing lime carbonate CaCO 32.7024g, barium carbonate BaCO 30.2960g, Strontium carbonate powder SrCO 30.2214g, boric acid H 3BO 3(2.9680g excessive 20%), yttrium oxide Y 2O 32.2355g, terbium sesquioxide Tb 4O 70.0187g and gadolinium sesquioxide Gd 2O 30.0181g after placing agate mortar fully to grind, put into corundum crucible at 650 ℃ of following pre-burning 5h, naturally cool to room temperature then, take out once more and fully grind.At last, in reducing atmosphere, the pre-burning product after grinding is calcined 4h down at 1200 ℃, naturally cool to room temperature, taking-up promptly gets white powder shaped Y after grinding 1.98Gd 0.01Tb 0.01Ca 2.70Ba 0.15Sr 0.15B 4O 12Green luminescent material.Luminous intensity is found after tested, and the luminous intensity of the luminescent material of present embodiment 10 is higher than the luminescent material about 15% of embodiment 1.
Comparative example
Take by weighing barium carbonate BaCO 35.9202g, boric acid H 3BO 3(2.9680g excessive 20%), yttrium oxide Y 2O 32.1452g and terbium sesquioxide Tb 4O 70.1869g after placing agate mortar fully to grind, put into corundum crucible at 700 ℃ of following pre-burning 4h, naturally cool to room temperature then, take out once more and fully grind.At last, in reducing atmosphere, the pre-burning product after grinding is calcined 5h down at 900 ℃, naturally cool to room temperature, taking-up promptly gets white powder shaped Y after grinding 1.9Tb 0.1Ba 3B 4O 12Green luminescent material.
In above-mentioned light emitting borate material, adopt rare-earth Gd 3+And Tb 3+The Y that mixes altogether 2-x-yGd xTb yM 3B 4O 12Material, there is not the twilight sunset influence basically in it.This luminescent material is with Y 2M 3B 4O 12Be luminous host, it has good vacuum ultraviolet (VUV) receptivity, stable physics and chemical property and the good ability of vacuum-resistant ultraviolet radiation and anti-ion bombardment.Because Gd 3+And Tb 3+Mix wherein Tb 3+The feature transition 5D 4→ 7F 5Meeting transmitting green light, spin coupling make it to have the short sunset glow time, and cancellation concentration are also high, even higher Tb to the shielding of spin forbidden 3+Doping content can not reduce luminous intensity yet, and is obviously excellent in traditional Mn 2+Doped luminescent material.Simultaneously, pass through Gd 3+Ion pair Tb 3+Sensitization and oneself not only improve Tb in the f-f of VUV transition 3+Luminous intensity and luminous efficiency, and improve the receptivity of luminescent material to vacuum-ultraviolet light.In above-mentioned preparation light emitting borate material method, adopt less processing step, for example to adopt and grind and calcination processing, these technological operations are easier, and are lower to the processing condition requirement, thereby cost is lower, helps suitability for industrialized production and application.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. light emitting borate material, it comprises the compound of following chemical formulation: Y 2-x-yGd xTb yM 3B 4O 12, wherein, x=0.01～1.2, y=0.01～0.6, M is an alkali earth metal.
2. light emitting borate material as claimed in claim 1 is characterized in that, the span of described x and y is respectively: x=0.2～0.8, y=0.1～0.4.
3. light emitting borate material as claimed in claim 1 is characterized in that, described alkali earth metal M is at least a among Ca, Sr, the Ba.
4. light emitting borate material as claimed in claim 1 is characterized in that, described alkali earth metal M is the combination of at least two kinds of elements among Ca, Sr, the Ba.
5. method for preparing light emitting borate material, it comprises the steps:
Choose source compound, the Y of alkaline-earth metal ions 3+Source compound, Gd 3+Source compound, Tb 3+Source compound and B 4O 12 12-Source compound, each source compound is pressed chemical formula Y 2-x-yGd xTb yM 3B 4O 12In mole metering between each element than choosing, wherein, x=0.01～1.2, y=0.01～0.6, M is an alkali earth metal;
With each source compound ground and mixed;
Mixture is carried out calcination processing, obtain described light emitting borate material after the cooling.
6. preparation light emitting borate material method as claimed in claim 5 is characterized in that described B 4O 12 12-Source compound according to molar fraction metering than excessive 5%～30%.
7. preparation light emitting borate material method as claimed in claim 5 is characterized in that the span of x and y is respectively: x=0.2～0.8, y=0.1～0.4.
8. preparation light emitting borate material method as claimed in claim 5 is characterized in that, the source compound of described alkaline-earth metal ions is at least a in its carbonate, oxyhydroxide, the oxalate, described Y 3+Source compound, Gd 3+Source compound and Tb 3+Source compound be respectively at least a in its oxide compound, muriate, nitrate, carbonate, the oxalate, described B 4O 12 12-Source compound be at least a in boron oxide or the boric acid.
9. preparation light emitting borate material method as claimed in claim 5 is characterized in that, described calcination processing process is: with mixture precalcining 1～6 hour under 400～800 ℃ of temperature, again in 800～1300 ℃ of temperature lower calcinations 2～12 hours.
10. preparation light emitting borate material method as claimed in claim 9 is characterized in that described calcining is to carry out in reducing atmosphere.
CN2010101007847A 2010-01-22 2010-01-22 Borate luminescent material and preparation method thereof Pending CN102134489A (en)

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GB1453991A (en) * 1973-03-14 1976-10-27 Philips Electronic Associated Luminescent materials
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Application publication date: 20110727