CN1143664A - Whitening method for luminescent material - Google Patents
Whitening method for luminescent material Download PDFInfo
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- CN1143664A CN1143664A CN 96108560 CN96108560A CN1143664A CN 1143664 A CN1143664 A CN 1143664A CN 96108560 CN96108560 CN 96108560 CN 96108560 A CN96108560 A CN 96108560A CN 1143664 A CN1143664 A CN 1143664A
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- luminescent material
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Abstract
A process for whitening luminous material body features that adhesive is used to stick white pigment particles onto surface of luminous material. The CRT made up of said material features high brightness, uniform luminous colour, good body colour and stable colour temp.
Description
The invention relates to the method for luminescent material Whitening, particularly the method for cathode-ray tube luminescent material Whitening.
As everyone knows, in the luminescent material that uses on the cathode tube, sulfide luminescent material is a most widely used class material.The body colour of most sulfide luminescent materials is not a white, as ZnS:Cu, the Al body colour is a light green, (Zn, Cd) the S:Ag body colour can have light green, faint yellow, yellow and safran etc. with CdS content difference, (Zn, Cd) body colour of S:Cu can have light green, yellow, safran and orange etc. with CdS content difference, and the CaS:Eu body colour is an orange.
Because the body colour of these luminescent materials is not a white, will cause many problems in the use.As widely used luminescent material in the black and white kinescope be blue light-emitting material ZnS:Ag and the jaundice luminescent material (Zn, Cd) S:Cu, the mixture of Al, the ZnS:Ag body colour be white, and (Zn, Cd) S:Cu, the body colour of Al be the yellow.Black and white kinescope generally all adopt the precipitator method with the said mixture coated on the internal surface of glass screen.When the above-mentioned luminescent material of electron-beam excitation, because (Zn, Cd) S:Cu, the body colour of Al is yellow, and it can absorb the blue light that ZnS:Ag sends, and therefore not only reduces the luminosity of black and white kinescope, and causing panel photochromic inhomogeneous easily, phenomenons such as center Huang appear.Be sort this problem out, often the method that adopts is to reduce the thickness of coating, but this can make brightness further descend.Because (Zn, Cd) S:Cu, the yellow body colour of Al, the body colour that makes said mixture is faint yellow, its coated can cause the panel of black and white kinescope also to have light yellow behind glass screen inner face, gives a kind of uncomfortable sensation of people.Because luminescent material is coated with complexor (every square centimeter grain weight) difference, the black and white kinescope colour temperature also can change in addition.Other luminescent material that black and white kinescope uses nearly all exists same problem.
In order to address the above problem, the present invention by use binding agent with the white pigment particle attached on the luminescent material surface with non-white body colour, make the luminescent material body colour become white, thereby can solve above-mentioned variety of issue up hill and dale from non-white.
Binding agent can use gelatin and gum arabic, also can use organic materialss such as acrylic resin or some polymkeric substance, and the binding agent amount ranges is the 0.01-15% of luminescent material weight, and the optimum amount scope is the 0.2-2% of luminescent material weight.
The white pigment particle can use titanium dioxide (titanium white), zinc oxide (zinc white), antimonous oxide (stibium trioxide), zinc sulfide white (lithopone), white lead carbonate (white lead), magnesium oxide, barium sulfate, calcium sulfate, lead sulfate, Calcium Pyrophosphate, stannous pyrophosphate, calcium phosphate, lime carbonate, barium carbonate, Calucium Silicate powder, Magnesium Silicate q-agent, pure aluminium silicate, magnesium aluminate, Zinc aluminate, lanthanum orthophosphate, zinc sulphide, tantalum pentoxide, Niobium Pentxoxide, aluminum oxide, white pigment such as titanium-calcium and titanox particle, white pigment average particle scope is 0.01-10 μ, the optimal average particle size scope is 0.1-1 μ, the adhesion amount of pigment particles is less than 15% of luminescent material weight, and best adhesion amount is the 0.1-5% of luminescent material weight.
The luminescent material that can carry out whitening comprises various non-white body colour luminescent materials, wherein have with ZnS and (Zn, Cd) S is the luminescent material of matrix, as ZnS:Cu, Al, (Zn, Cd) S:Ag, (Zn, Cd) S:Cu, Al, (Zn, Cd) S:Au, Ag, Al, ZnS:Au, Al etc., also having with the alkaline earth sulfide is the luminescent material of matrix, as CaS:Eu, SrS:Eu etc. and other luminescent material.
If use gelatin and gum arabic as binding agent, method is as follows: earlier gelatin is dissolved in T=40 ℃ the pure water, makes gelatin solution, add luminescent material then, fully stir, obtain the suspension liquid of luminescent material.In addition, gum arabic is dissolved in the pure water, adds white pigment, fully stir, obtain the white pigment suspension liquid.Again above-mentioned two kinds of suspension liquids are mixed, constantly stir simultaneously, regulate with acetic acid, make pH of mixed value=4-6, mixed solution is cooled to slowly add glutaraldehyde then below 10 ℃ again, wash at last, dewater, dry and sieve, obtain to adhere to the luminescent material of white pigment particle.
If the use acrylic resin, method is as follows: earlier luminescent material is added in the pure water, obtain the suspension liquid of luminescent material, add and carry out dispersed white pigment suspension liquid in advance, and constantly stir.Constantly adding the latax of anionic property acrylic resin and the latax of cationic acrylic resin successively under the condition of stirring then, add the anionic property latax of forming by rigid acrylic resin again, wash at last, dewater, dry and sieve, obtain to adhere to the luminescent material of white pigment particle.
Be elaborated with example below.
Example
0.5 gram gelatin is dissolved in the T=40 ℃ of pure water, makes 0.3% gelatin solution, (Zn, Cd) S:Cu, the Al luminescent material of turn to be yellow, stirring fully obtain the suspension liquid of luminescent material to add 100 grams then.In addition 0.4 gram gum arabic is dissolved in the pure water, obtains 0.3% gumwater, add 0.2 gram titanium dioxide white pigment again, fully stir, obtain the suspension liquid of white pigment.With above-mentioned two kinds of suspension liquids under continuous condition of stirring, mix, adjust pH of mixed=4.5 then, mixed solution is cooled to below 10 ℃ again, under continuous stirring state, add 0.5 gram glutaraldehyde lentamente, wash at last, dewater, dry and sieve, obtain to adhere to the luminescent material of white pigment particle.
Above-mentioned luminescent material and ZnS:Ag are mixed by a certain percentage, adopt the precipitator method that this luminescent material coated is shielded inner face at the black and white kinescope glass then, again through coated organic membrane, vacuum cover aluminium, roasting, seal, exhaust, activation and ageing etc., make black and white kinescope.Under the exciting of negative ray, this fluorescent screen has the brightness height, glow color is even, body colour good and advantage such as colour temperature advantage.
Claims (6)
1. a kind of method of luminescent material Whitening is characterized in that: by binding agent with the white pigment particle equably on the particle surface attached to luminescent material, thereby make the luminescent material body colour become white from non-white.
2. in accordance with the method for claim 1, it is characterized in that: binding agent can use gelatin and gum arabic, also can use organic materialss such as acrylic resin or some polymkeric substance, the amount ranges of binding agent is the 0.01-15% of luminescent material weight, and the optimum amount scope is the 0.2-2% of luminescent material weight.
3. in accordance with the method for claim 1, it is characterized in that: the white pigment particle can use titanium dioxide (titanium white), zinc oxide (zinc white), antimonous oxide (stibium trioxide), zinc sulfide white (lithopone), white lead carbonate (white lead), magnesium oxide, barium sulfate, calcium sulfate, lead sulfate, Calcium Pyrophosphate, stannous pyrophosphate, calcium phosphate, lime carbonate, barium carbonate, Calucium Silicate powder, Magnesium Silicate q-agent, pure aluminium silicate, magnesium aluminate, Zinc aluminate, cupric phosphate, zinc sulphide, tantalum pentoxide, Niobium Pentxoxide, aluminum oxide, titanium-calcium and titanox or the like white pigment particle, the mean particle size range of white pigment particle is 0.01-10 μ, the optimal average particle size scope is 0.1-1 μ, the adhesion amount of pigment particles is less than 15% of luminescent material weight, and best adhesion amount is the 0.1-5% of luminescent material weight.
4. in accordance with the method for claim 1, it is characterized in that: the luminescent material that can carry out whitening comprises the luminescent material of various non-white body colours, wherein has with ZnS and (Zn, Cd) S is the luminescent material of matrix, as ZnS:Cu, and Al, (Zn, Cd) S:Ag, (Zn, Cd) S:Cu, Al, (Zn, Cd) S:Au, Ag, Al, ZnS:Au, Al or the like, also having with the alkaline earth sulfide is the luminescent material of matrix, for example CaS:Eu, SrS:Eu etc. and other luminescent material.
5. according to claim 1 and 2 described methods, it is characterized in that: earlier the luminescent material particle is dispersed in the gelatin solution, make the luminescent material suspension liquid, the white pigment particle is dispersed in the gumwater, make the white pigment suspension liquid, then above-mentioned two kinds of suspension liquids are mixed, add the stiffening agent glutaraldehyde again, wash at last, dewater, dry and sieve, obtain to adhere to the luminescent material of white pigment particle.
6. according to claim 1 and 2 described methods, it is characterized in that: earlier luminescent material is added in the pure water, obtain the suspension liquid of luminescent material, add again and carry out dispersed white pigment suspension liquid in advance, constantly adding the latax of anionic property acrylic resin and the latax of cationic acrylic resin successively under the stirring state then, add the anionic property latax of forming by rigid acrylic resin again, wash at last, dewater, dry and sieve, obtain to adhere to the luminescent material of white pigment particle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96108560 CN1143664A (en) | 1996-06-27 | 1996-06-27 | Whitening method for luminescent material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96108560 CN1143664A (en) | 1996-06-27 | 1996-06-27 | Whitening method for luminescent material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1143664A true CN1143664A (en) | 1997-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96108560 Pending CN1143664A (en) | 1996-06-27 | 1996-06-27 | Whitening method for luminescent material |
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| Country | Link |
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| CN (1) | CN1143664A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104731432A (en) * | 2015-02-03 | 2015-06-24 | 深圳南玻伟光导电膜有限公司 | White capacitive touch screen and manufacturing method thereof |
| CN114806252A (en) * | 2021-01-19 | 2022-07-29 | 杭州路丽新材料有限公司 | Road coating material and spraying process |
-
1996
- 1996-06-27 CN CN 96108560 patent/CN1143664A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104731432A (en) * | 2015-02-03 | 2015-06-24 | 深圳南玻伟光导电膜有限公司 | White capacitive touch screen and manufacturing method thereof |
| CN104731432B (en) * | 2015-02-03 | 2018-01-12 | 宜昌南玻显示器件有限公司 | white capacitive touch screen and preparation method thereof |
| CN114806252A (en) * | 2021-01-19 | 2022-07-29 | 杭州路丽新材料有限公司 | Road coating material and spraying process |
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