CN1178548A - Luminescent screen - Google Patents
Luminescent screen Download PDFInfo
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- CN1178548A CN1178548A CN 97190065 CN97190065A CN1178548A CN 1178548 A CN1178548 A CN 1178548A CN 97190065 CN97190065 CN 97190065 CN 97190065 A CN97190065 A CN 97190065A CN 1178548 A CN1178548 A CN 1178548A
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- China
- Prior art keywords
- zeolite
- luminescent screen
- luminescent
- ion
- rare earth
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Abstract
The invention relates to a luminescent screen comprising a bearer provided with a luminescent material comprising a luminescing zeolite containing rare earth ions. According to the invention, the zeolite also comprises a transition metal oxide. The absorbability for exciting UV-radiation and thereby the overall efficiency of the luminescent screen are thereby strongly enhanced.
Description
The present invention relates to comprise the luminescent screen that the luminescent material bearing is housed, this luminescent material comprises the mordenite that contains rare earth ion.
The invention still further relates to mordenite that is used for this luminescent screen and the method for preparing this zeolite, and the low-pressure mercury discharge lamp that comprises this luminescent screen.
Start one section mordenite of mentioning by International Patent Application WO 95/16759 is known at this paper.In general, use luminescent screen excitation energy to be transformed into the ray of particular range of wavelengths.This excitation energy can be by for example electron beam, and the short relatively UV-ray of X-ray or wavelength is formed.In a lot of other application, luminescent screen particularly has its purposes in low-pressure mercury discharge lamp or the luminescent lamp at lamp.Excitation energy mainly comprises the UV-ray of the about 254nm of wavelength that is produced by the mercury in the gas ions that is present in luminescent lamp.The composition of luminescent screen generally relies on by the radiative required spectrum composition of luminescent lamp and selects.In known luminescent screen, the rare earth ion that is contained in this zeolite is Ce
3+Ion.When shielding with this known luminescence of UV rays excite of 254nm wavelength, it launches the light of maximum emission wavelength between 300-400nm.For example, such luminescent screen can be used for for example polymerization of photoprocess very effectively, lacquer sclerosis, and drying is solidified, and uses in treatment medical radiation purpose or tanned etc. the low-pressure mercury discharge lamp.Quantum yield is very high in this known luminescence screen.Because this rare earth ion is surrounded by zeolite structured, so this known luminescence screen also is very stable in the very wide temperature range of different chemical environment neutralizations.Zeolite generally also is very cheap and environment is not had harm.Yet the time needs this luminescent lamp luminous in spectrographic visible light part mostly.This can be in the luminous of spectrum visible light part by in zeolite, mixing for example Tb of other rare earth ion
3+Ion is realized.Comprise and contain Tb when the UV rays excite with the 254nm wavelength is equipped with
3+During the luminescent screen of the luminescent material of ion zeolite, this luminescent screen will be launched the visible light of wavelength in the 450-650nm scope.Yet a problem relevant with the zeolite that much contains the rare earth ion of visible emitting when with the UV-rays excite of wavelength 254nm is: the absorption of exciting radiation is very low, causes the amount of the visible light that exciting radiation produces relatively low.
The luminescent screen that the purpose of this invention is to provide visible emitting when with the UV-rays excite of wavelength 254nm, this luminescent screen be stable and the amount of the visible light that produces of exciting radiation relatively large.
Therefore, starting one section luminescent screen of mentioning according to the present invention at this paper is characterised in that: this zeolite also contains transition metal oxide.Have been found that when using the UV-rays excite of wavelength 254nm, can produce the visible light ray relatively expeditiously according to luminescent screen of the present invention.
Have been found that rare earth ion number at per unit structure cell zeolite is to have obtained good relatively result under 1 the situation at least.Similarly, under being 1 situation at least, the transition metal ion number of per unit structure cell zeolite also obtained good relatively result.
More specifically, be that this luminescent screen has than higher efficient under the situation of faujusite (Faujasite) type at zeolite.
Comprise Tb for rare earth ion wherein
3+Ion and/or Eu
3+The ionic luminescent screen has obtained extraordinary result.
Comprise that for transition metal oxide wherein one or more are selected from molybdenum oxide, Tungsten oxide 99.999, the luminescent screen of the oxide compound of niobium oxides and tantalum oxide has also obtained extraordinary result.
Know that prepare under the situation of this zeolite in the method for sequential steps below comprising, this luminescent screen has than higher efficient:
-by ion-exchange rare earth ion is mixed in the zeolite,
This zeolite of-heat treated,
-transistion metal compound mixed in this zeolite and
-this transistion metal compound is transformed into transition metal oxide.
Mixing of this transistion metal compound can be carried out in solution or from gas phase.For example, the appropriate precursors of Tungsten oxide 99.999 is volatile or soluble material, for example, and muriate, oxychlorination thing or carboxide (WCl
6, WOCl
4, W (CO)
6Deng).
Be the general embodiment of preparation below according to zeolite of the present invention.
With the 2g approximate expression is Na
86.9(Al
86.9Si
105.1O
384)
*264H
2The zeolite of O is suspended in 18.24mlH
2Among the O, and PH is adjusted to about 5 with the HCl of 0.1n.Add 1.76mlTbCl
3The aqueous solution (1M).The solution that obtains was refluxed 24 hours.Filter out solid then, use H
2(3 * 20ML) washings are also dry in 120 ℃ of vacuum for O.With the 400 ℃ of calcinings 1 hour under oxygen of the powder that obtains (heat temperature raising speed be 1 ℃/min).The approximate expression that obtains first product is Tb
16Na
38.9(Al
86.9Si
105.1O
384)
*264H
2O.This is corresponding to about 16 Tb of per unit structure cell
3+Ion.
This powder of 1g is put in the evacuable frit, and its bottom is being fixed one 0.5gW (CO) is being housed
6Small vessels.Then, this container is fixed in the warm bath, is being lower than under the 0.01mbar pressure, make W (CO)
6Distillation and enter zeolite from this bath by frit.Temperature can be from room temperature to 90 ℃.As whole W (CO)
6When disappearing from container, from frit, take out zeolite and put in the Soxhlet, reach 24 hours most with the THF extraction.Obtain white material, it is suspended in the 25ML water and with the 30%H of 5ML
2O
2Mix and refluxed 1 hour.After filtering out, with this powder under Oxygen Flow 600 ℃ of heating 2 hours, this Oxygen Flow with steep by drum before fluorescent substance contacts.The approximate expression that obtains second product is Tb16W (CO
x)
6Na
38.9(Al
86.9Si
105.1O
384)
*264H
2O, wherein the x value is unknown.
Have been found that and contain Tb
3+The stability that the zeolite of ion and Tungsten oxide 99.999 (second product) has is only to contain Tb
3+About 60 times of ion zeolite (first product).Under identical shooting conditions, the amount of the spectrum visible light of scope between 400-650nm that is produced by second product is about 20 times high of first product.Therefore, the Tungsten oxide 99.999 of relatively small amount just very makes us unexpectedly having increased the efficient of this mordenite.The emmission spectrum of first and second products is actually identical.
Claims (10)
1. the luminescent screen that comprises the bearing that luminescent material is housed, this luminescent material comprises the mordenite that contains rare earth ion, it is characterized in that this zeolite also contains transition metal oxide.
2. according to the luminescent screen of claim 1, wherein this rare earth ion comprises Tb
3+Ion.
3. according to the luminescent screen of claim 1 or 2, wherein this rare earth ion comprises Eu
3+Ion.
4. according to claim 1,2 or 3 luminescent screen, wherein this transition metal oxide comprises that one or more are selected from the oxide compound of molybdenum oxide, Tungsten oxide 99.999, niobium oxides and tantalum oxide.
5. according to the luminescent screen of one or more aforementioned claims, wherein this zeolite is a faujusite.
6. according to the luminescent screen of one or more aforementioned claims, wherein the rare earth ion number of per unit structure cell zeolite is 1 at least.
7. according to the luminescent screen of one or more aforementioned claims, wherein the transition metal ion number of per unit structure cell zeolite is 1 at least.
8. comprise low-pressure mercury discharge lamp according to one or more aforementioned claim luminescent screens.
9. be used for mordenite according to the luminescent screen of claim 3 or 4.
10. preparation contains the method for the mordenite of rare earth ion and transition metal oxide, the step of order below comprising:
-by ion-exchange rare earth ion is mixed in the zeolite,
This zeolite of-heat treated,
-transistion metal compound mixed in this zeolite and
-this transistion metal compound is transformed into transition metal oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97190065 CN1178548A (en) | 1996-02-08 | 1997-01-27 | Luminescent screen |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP96200281.2 | 1996-02-08 | ||
| CN 97190065 CN1178548A (en) | 1996-02-08 | 1997-01-27 | Luminescent screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1178548A true CN1178548A (en) | 1998-04-08 |
Family
ID=5178613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97190065 Pending CN1178548A (en) | 1996-02-08 | 1997-01-27 | Luminescent screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1178548A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101529480B (en) * | 2006-10-10 | 2015-01-28 | 德国捷德有限公司 | Authenticity mark in the form of a luminescent substance |
-
1997
- 1997-01-27 CN CN 97190065 patent/CN1178548A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101529480B (en) * | 2006-10-10 | 2015-01-28 | 德国捷德有限公司 | Authenticity mark in the form of a luminescent substance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Applicant after: Koninklike Philips Electronics N. V. Applicant before: Philips Electronics N. V. |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: N.V. PHILIPS OPTICAL LAMP LTD., CO. TO: ROYAL PHILIPS ELECTRONICS CO., LTD. |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| REG | Reference to a national code |
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