JPS5953579A - Fluorescent substance - Google Patents

Abstract

PURPOSE:A fluorescent substance having improved dispersion in slurry, forming a fluorescent layer having high denseness, providing improved luminance, obtained by covering the surface of parent body of fluorescent substance of yttrium oxysulfide activated with tarbium or europium with barium phosphate. CONSTITUTION:The surface of parent body of fluorescent substance of yttrium, oxysulfide activated with terbium or europium, or of parent body of fluorescent substance of yttrium oxysulfide activated with terbium or europium coated with pigment of red iron oxide is covered with barium phosphate, to give the desired fluorescent substance. The amount of barium phosphate applied is preferably 0.001-0.7wt% based on the fluorescent substance to be covered. USE:A fluorescent film of color picture tube.

Description

[Detailed description of the invention] (Technical field of invention) The present invention relates to barium phosphate coated phosphors.

(Technical background of the invention and its merits) The method for forming a fluorescent film for a color picture tube is generally made using polyvinyl alcohol.
A phosphor is dispersed in an aqueous solution containing Fl/(PVA, ), ammonium chromate and a surface activator, and this is applied to all the glass panels to form fluorescein 1 and 2. Next, -C1 ultraviolet rays are irradiated through a shadow mask to harden the 14i PvA, and the fluorescent material is removed from the areas other than the hardened areas, and the phosphor stripes are formed. All dots are formed. This operation is repeated three times for each luminescent color of the phosphor, thereby forming blue, green, and red phosphor films respectively.What is required of the phosphor in this coating method (c): (1) Form a dense stripe or dot. In other words, fluorescence j1 with few holes
1.(Kai()).

(2) One luminescent component should not mix with other luminescent components or light bodies, that is, no M color discoloration should occur.

Light conditions are required. In order to meet these requirements, it is essential that the fluorescent particles be well dispersed without agglomeration in the rt1 slurry. Red fluorescent color picture tube i1J+k
i. As is well known, in order to form a fluorescent garment in three colors [], the red phosphor is required to have good dispersibility. Forming a fluorescent surface on the third color is due to the blue and green fluorescent layers previously formed on the third color, as well as the black layer, so the coated surface is highly uneven. 1 for savings i;
6H1 is a bad phosphor, and the spread of fluorescein 1 slurry during J1 coating is poor, so there are many holes on the tail surface of 11, and only a less dense fluoresce curve can be obtained, and 1'j
A mountain where phosphors remain on the color or green phosphor layer! Color fiE is more likely to occur. Such a fluorescent light 11! ;4 blood, brother)'1
', brightness 11') 1 decrease, color purity of 1 curved image deteriorates.

Such 371ft (fluorescent material K #!+ surface treated with various methods in order to have good properties) is known.
There is r, but it is ±7 and cannot be said to be 10η.

(Zaraaki's 1j target) +: I! The aim is to provide improved power, light control, and improved cohesiveness.

(Atsushi of the invention) Invention glue 1! The light body has a barium phosphate compound coated on the surface of the base phosphor body.

"Is it terbium or rJ europium? i'j Mm yttrium sulfide phosphor, also shj1
Red red pigment stirred europium 1] Active yttrium oxysulfide phosphor was dissolved in 115C water, and a phosphoric acid compound (for example, Na211PO, (phosphorus, etc.)
□Disodium hydrogen) K! 11)”0. (RinllI
:, dipotassium dichloride), (N114), IIl'0
4 (niammonium hydrogen phosphate) Q'7) solution, and further water-soluble barium salt (tl), lli
'jF + Ni)・Rium (Ba (Nd5) 2 ) Barium chloride (13aC12) etc.) It &1 addition,
Reacting phosphate and barium ions in water, 1! , Rin 11? Precipitate the barium salt onto the surface.

After washing with deionized water several times, filtering
It can be removed by drying at 0 to 150'O.

The four barium phosphate dressings range from (0) 0 blood weight to 0.8%, 11%/1, or 1 inch, and 0.
005 city, 05 weight: ti; percent is more preferable. Here, the table 1f11 processing interval is
If it is less than 11.001 weight percent, the fractional properties of the phosphor are not good and it is not possible to obtain the fluorescent light that can be obtained by adding Nlld:J. 0.8i! A,)・percent)Q
If it exceeds 1), the brightness spread will decrease due to surface treatment.
Furthermore, 6J scatter 11. There is a tendency for people to go on a ship. :I:
It is possible to do this by using the IC.

In addition, the present invention uses terbium or Q' eurohium i.1 activated acid tll:i+ for yttrium phosphor with 0.1 (penbook candy with 51 europium fb F:t: i+
: IL conversion-f ttrium I; applied to light 11. Jl,
Ru.

・l-)Ra Ming's;Kenmen Ikirinl'l・2・Baliud de (
j! <4+; 17
4 especially 31, sui, 1 (so hahiri high <1. light ha Q
It is possible to form a light) 1) Light A11
I'm good at 1 (I'm good.

(Lus 1st light fire h1:: example) It also shows 11 examples of Kiya and Akira's ability under 1st subordinate.

Actual hl;; times].

Y', ()2S/Eu (ko, -Robium attachment 11
・11, Iso1lium oxide) 'Firefly)'L; Body 1 kg
"a: II) 21 on water 10 e fC min iik'
;J -L 6゜ko (j + minute 1b flf? to 2'n 6
Phosphorus itv disodium hydrogen (Na, 1.LJ'04)
Water 11 effect Q 2. G C(' k /Jlle'tlO
: 5J interregnum, and KIO% Nizono Valium (Ila
(N(Js) t) 7?4 /Ij 1.4 cc
- Add t5 and pray for 20 minutes → -ru. ], Stir J1j Xun Guanghai, sink 1;・15 Ki1 main, remove upper vkI liquid by decantation. That i<, :%j? ') Y:, Ill e no II > l I, :l 15 times l with water.
751t L/Ta 'J, filtered and 1JO (,! 1
)il Ji-i (/J jA, i l+-'(:
Fortress, i;a L, 2tlO meshc! iii Separate vinyl and eζ from eurobiuno and f15i'+yu (vI
Yttrium L>'t, (+ surface ffU, 0
A phosphor coated with 1% barium phosphate was obtained.

Fluorescent material 11 prepared as above, slurry Itt
71, the dispersion in the inside is good, and using this sura IJ u-, +ljl 'll'I';
Ill1 formed by the panel for ij
(:1, word of denseness and less perforation) 1', 1th h
I'm sorry.

Therefore, good luminescence brightness is obtained by 1) t15-8 The measurement results of luminescence jJE and 11' density expansion (filling rate) for this phosphor are shown in the table 1-0. Conventional Y! (J2 S/Eu': 1
00910.

Example 2゜Y, 01S/Eu (nee a biumui; J1 fortune 1'l
* If 1 kg of (t: yttrium ij) fluorophore>
i', ・Dissolve in lOl of rice water.

Add this dispersion to 2% disodium hydrogen phosphate water I mortar solution 26
cc and stir for 10 minutes. Next, 14 cc of 10% barium nitrate solution was added, and 1 tl was added for 20 minutes.1. M stir. After stirring, the fluorophore is allowed to settle and the upper part is removed by decantation. Then lb of fluorophore lOl
, l'Water bI 5 times with ionized water: Shitanoshi filter, 12
The temperature after SO°C 181iJ is t-1.
Piumui ζj active intoxication (ilii-formed yttrium) can get.

The light body was added to the A:1 obtained by the above 6T, and the dispersion was good in the slurry solution. The n<;\ which was applied and formed on the i;
In: (Q h'h ii (1,6 days ago lj ii) 1', ii 1: was it/.

``One) Tera kf i 'j1y Lノ澾郎が1j:Rex=.

Show your results! /(,show.

S4))+'p &lJ 8゜'120. E→
/J:ill (Europium attached to fortune-telling Yttriu,” ) (:+73'l': 11'l kg
i, 11 IIl;, ゛Imen water 1()lKlrJl;
(Let.

This 53・f:"<7+fL 2% phosphorus 1・(ihydrogen ninatosu') M!S l'lk 182C plug" addition 2.10 minute bond, , f I'm-ru. Next, 10% barium nitrate was added to 98 c (: %), and 20
Stir for a minute (1°t. Stirring layer, I'j light f'v?
U 7A, F, 1], L s l il, r-M %
: Decantation Hi CI! ;i: Reject. After that, water the fluorescent material 5 times with 11 ε ion water of 101? ;I: L
37 o) Ralo 31F, l L, 130” (16+4
After OJ warm W-"-'j'I'+ j, ; le, 200
fini53111 Rukoto niyo IJ Europium visit i! + & fil: The surface of the yttrium fluoride phosphor is covered with 0.7% phosphorus t'b2 beryum to obtain a phosphor body.

The amount of fireflies produced in the slurry r, 'f'l is good, and this slurry can be used to prepare the fireflies by a common method. Carefully form a square on the panel for the λ polar ray tube.

First, a fluorescent film with high density and few pores was obtained.

Therefore, a good brightness of 46 lights can be obtained.

The results are shown in the full table.

Example 4 1 kg of 028/Eu (:"O) phosphor was dispersed in 10 l of deionized water, and 1% phosphorus was added to the dispersion of V. Added 1.7cc of hydrogenated ammonium (NII) HPO4 aqueous solution 1
Stir for 0 minutes. Next, 2% barium chloride (Bacl□)
Add 2 cc of Shishibu and stir for 20 minutes. bond, bow'i
i't) Sediment the u-bodies, decant the supernatant, and discard. After that, the phosphor was washed with 101 Hashito ionized water 5 times, then filtered and heated to 130°C.
By drying the thirsty limbs and separating 1 sweetfish for 200 meshes, it becomes Eurohiumei;
,0034fi,kj bar sen] Norin f'i"E
The light body was nucleated with barium (I7) and 7. )
.

Sat'=Q 4c, , 1: jJi[)are-jc 4
H'-Hikari 4: Ii 1/(3 in Silly Ifi liquid)
ii'l is 1, □Using this slurry, 31η deer l), , 111 'l', ;(φ'l'l
For panel "-nini', 1i ar"L %e)
r'y, Schiff: Membrane Ha, 11 bow °:) degree ^? i
It was possible to obtain fluorescent j1.- with fewer pores.

Yotsu-'C3*F4. uc 5'Q) litt 1
．． rt is a) I is t2.

A.,'gate 1! : busy i (ni-ri-6 actual addition!I4su5゜Y2O2S, /'Eu (knee r+biuno・visit r1
41lij-1 tutrium) Fluorescence fl'll+εi(
Make lI cytoion water 104 6] 11.

This is the first ministry 1″! - Disperse your strength well until it becomes 5.
% Red Garla (iri j'l force 1lk 2 (l cc stone-washed wipe <(σme, l'l 'f' 2). Then 4
59 people Acrylic emulsion filling 1+k K l cck
, plus good<1. J', 4'l Tru. In this
1 unit l'+i+ 'a: Add P[(to 3 ^^
11・1i 1.30 month fit J'+j: 4'l
"-4ru. 4+'f, 4'"Jr-i ball mill bot, 2(]] song 10-lumil begged. After ball mill,
1; Transfer the whole body to J, 41 it-, add desilicated water to it, and make it fL li-? 11273 and J
Ru. - After washing, add PII to 7 to 8 with ammonia water.
and stir for 30 minutes. After applying the fluorophore 5 times/1L with deionized water.

Next, add ionized water to make a total volume of 1iklU4, and add 1% ammonium hydrogen phosphate Ii'R1 while stirring.
Add 't50CC and stir for 10 minutes. Then 1.
Gradually add 14 cc of 0% barium 611 acid solution and leave for 7.20 minutes at 11L4≧1゛T. i # Stir the phosphor to settle,
Remove the epipox fluid by tecantation. (After washing the phosphor with 101 (7J) deionized water five times, it was filtered.
By drying at 130°C to 50°C and sieving with a 200 mesh, the surface of the red iron pigment-covered europium-activated yttrium phosphor was 081↓l.
The fluorescent light lost by the barium phosphate of Ll% is (iJ).Therefore, good luminescence brightness is
I was beaten.

The phosphor C1 obtained above, streak') -("is
7 The distribution in the sentence is good, and using this slurry, 1...
' Using Hatake's method, place it on the M ring wire tube panel, 1-41,
11j, who was a big brother, is a 4-year-old who has a poor reputation and a hole.
- Firefly 3'F:, L, q or 1 shoe was taken.

The results are shown in the table.

The above actual h11-times are based on the main &i=Y', U, S/hju red 11-light phosphor.
Bright) j Y, U2S/'l'b green 3'+';J'
,+''11& can also be used for 2 children 1j.

(Ui Aing's Young Worker 1ξ) SuJ-+li, 1-Unifu 51:1 Akini J, Barium Ruphosphate 411. '7 QH, i, 1c plubium or europium active acid Irf, □It', 4 ttrium fluoride, 4, or tuna material used with a pen, eurohium with h'? l+; j-yttriuno・firefly') E body is
I+ with good dispersion in slurry and formed in the first place
・, i is high density, less porosity, luminescence h・11
The most favorable running characteristics were obtained. Therefore, the effect of this rule is extremely large.

Agent Patent Attorney Rules -1EL Family・, Xun (t=
1. or 1 person) -6:F

Claims (2)

[Claims] (1) A phosphor characterized in that the surface of a terbium- or europium-activated yttrium oxysulfide phosphor matrix or a red iron pigment-coated europium U-activated yttrium oxysulfide phosphor matrix is coated with barium phosphate. (2) The phosphor according to claim 1, wherein the amount of barium phosphate broken down is 0.001% to 0.7ii% by weight based on the coated phosphor. .