JPH02228389A - Self-activating zinc oxide phosphor - Google Patents
Self-activating zinc oxide phosphorInfo
- Publication number
- JPH02228389A JPH02228389A JP1050456A JP5045689A JPH02228389A JP H02228389 A JPH02228389 A JP H02228389A JP 1050456 A JP1050456 A JP 1050456A JP 5045689 A JP5045689 A JP 5045689A JP H02228389 A JPH02228389 A JP H02228389A
- Authority
- JP
- Japan
- Prior art keywords
- phosphor
- sulfur
- self
- zinc oxide
- amount
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- DLISVLVFJRCVJM-UHFFFAOYSA-N zinc oxygen(2-) phosphane Chemical compound [O--].P.[Zn++] DLISVLVFJRCVJM-UHFFFAOYSA-N 0.000 title claims description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 32
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 17
- 239000011593 sulfur Substances 0.000 claims abstract description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical class O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 238000004381 surface treatment Methods 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 claims description 2
- ONIOAEVPMYCHKX-UHFFFAOYSA-N carbonic acid;zinc Chemical compound [Zn].OC(O)=O ONIOAEVPMYCHKX-UHFFFAOYSA-N 0.000 abstract 1
- 239000011667 zinc carbonate Substances 0.000 abstract 1
- 229910000010 zinc carbonate Inorganic materials 0.000 abstract 1
- 235000004416 zinc carbonate Nutrition 0.000 abstract 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 27
- 239000011701 zinc Substances 0.000 description 20
- 239000011787 zinc oxide Substances 0.000 description 13
- 239000013078 crystal Substances 0.000 description 9
- 239000012190 activator Substances 0.000 description 7
- 238000010894 electron beam technology Methods 0.000 description 6
- 238000010304 firing Methods 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 239000008119 colloidal silica Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000000638 stimulation Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical class [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Luminescent Compositions (AREA)
Abstract
Description
本発明は、主として、蛍光表示管やフライングスボ・ソ
ト管に使用される自己付活酸化亜鉛蛍光体に関する。The present invention relates primarily to a self-activating zinc oxide phosphor used in fluorescent display tubes and Flying Subo-Soto tubes.
自己付活酸化亜鉛蛍光体は、習慣的にＺｎＯ：Ｚｎと書
かれている。この蛍光体は、導電性があるために、蛍光
表示管用として重要である。低速電子線で刺激されて、
青緑色に発光し、優れた発光特性を有する。
ＺｎＯ： Ｚｎ蛍光体は、母体構成元素と同じ亜鉛を付
活剤とするため、付活剤のＺｎを特定することが困難で
ある。このことは本蛍光体の特性を改良することを著し
く難しくしている。
この蛍光体の製造においては、製造者が経験で、焼成雰
囲気を調整して付活剤となるＺｎｆｌｔを特定している
。すなわち、熟練者の感が、本蛍光体の性能を左右する
重要な要件となっている。従って、安定して優れた特性
のＺｎＯ：Ｚｎ蛍光体を製造することは、極めて困難を
伴っていた。
このため、発光効率が高く、しかも、寿命特性の優れた
自己付活酸化亜鉛蛍光体を安定に製造できる技術開発が
切望されていた。Self-activated zinc oxide phosphors are customarily written as ZnO:Zn. This phosphor is important for use in fluorescent display tubes because of its electrical conductivity. Stimulated by a slow electron beam,
It emits blue-green light and has excellent luminescent properties. ZnO: Since Zn phosphor uses zinc, which is the same as the host constituent element, as an activator, it is difficult to specify Zn as the activator. This makes it extremely difficult to improve the properties of the present phosphor. In manufacturing this phosphor, the manufacturer uses experience to adjust the firing atmosphere and specify Znflt as the activator. In other words, the impression of a skilled person is an important factor that influences the performance of the present phosphor. Therefore, it has been extremely difficult to produce a ZnO:Zn phosphor with stable and excellent characteristics. Therefore, there has been a strong desire to develop a technology that can stably produce self-activated zinc oxide phosphors with high luminous efficiency and excellent lifetime characteristics.
本発明はこの要求に答えるために開発されたものである
。この発明の重要な目的は、発光効率、並びに寿命特性
ともに優れ、しかも安定に製造できるＺｎＯ：Ｚｎ蛍光
体を提供することにある。The present invention was developed to meet this need. An important object of the present invention is to provide a ZnO:Zn phosphor that has excellent luminous efficiency and lifetime characteristics and can be stably manufactured.
本発明のＺｎＯ： Ｚ０蛍光体は、共付活剤としてイオ
ウを導入している。一定量のイオウを導入することによ
り、付活量を特定して発光効率を制御している。
さらに、好ましくは、自己付活酸化亜鉛蛍光体を表面処
理物質で被覆している。表面処理物質には、アルミナ変
形型コロイダルシリカを使用している。表面処理物質の
付着量は、０．００１〜０゜１１徹％とじている。表面
処理物質は、自己付活酸化クト鉛蛍光体の寿命特性を大
幅に改良する。The ZnO:Z0 phosphor of the present invention incorporates sulfur as a co-activator. By introducing a certain amount of sulfur, the amount of activation is specified and the luminous efficiency is controlled. Furthermore, preferably the self-activated zinc oxide phosphor is coated with a surface treatment material. Alumina deformed colloidal silica is used as the surface treatment material. The amount of surface treatment substance deposited is 0.001 to 0.11%. The surface treatment material significantly improves the lifetime characteristics of the self-activated ctlead oxide phosphor.
酸化亜鉛蛍光体の発光輝度を高めるために最も大きな要
因は、発光中心の濃度と、結晶内における発光中心の幾
何学的な配置である。発光中心は、多すぎても、少なす
ぎても発光輝度が低下する。
それは、発光中心が多すぎると濃度消光が起こり、反対
に少ないと発光効率が減少することが理由である。
また、発光中心の結晶内における幾何学的な配列が、理
想的な結晶の配列に比較して偏っていると、高い発光輝
度が得られないことも究明されている。
発光中心の幾何学的配列を制御できるなら、高い発光効
率を維持できる。
本発明者等は種々実験を繰り返した結果、ＺｎＯ：Ｚｎ
蛍光体の母体中に、イオウを適量導入させることにより
、発光効率、ひいては発光中心の量と、結晶内への配置
を制御できることを見いだした。
イオウ（Ｓ）は、付活剤となる亜鉛量と、付活剤の結晶
内への適正配置を助ける働きをし、しかも、一部はＺｎ
Ｏ：Ｚ、ｎの結晶構造に含有される。
イオウ（Ｓ）の含有量は、好ましくは、１１００ＰＰ以
下に調整される。さらに好ましくは、イオウ（Ｓ）の含
有量を、５〜５０ｐｐｍの範囲に調整すると、ＺｎＯ：
Ｚｎ蛍光体は、最も発光効率が高くなる。
第１図に、イオウ（Ｓ）の含有量に対するＺｎ０：Ｚｎ
蛍光体の相対発光輝度を示す。この図に示すように、イ
オウ（Ｓ）の含有量がｌｏｐｐｍ以下の範囲では、イオ
ウ（Ｓ）の含有量が多くなるほど、発光輝度が高くなる
。イオウ（Ｓ）の含有量が１０ｐｐｔｎ以上になると発
光輝度は次第に低下する。
ただし、第１図はイオウ（Ｓ）を含まないＺｎＯ：Ｚｎ
蛍光体の輝度を１００％として、相対発光輝度を測定し
ている。
また、自己付活酸化亜鉛蛍光体であって、アルミナ変形
型コロイダルシリカ等の表面処理物質で被覆されたＺｎ
Ｏ： Ｚｎ蛍光体は、蛍光表示管に使用して寿命特性を
著しく改善することもできる。
その理由は総て明かではないが、表面にある５１０２や
ＡＱ２０３が、結晶表面のＺｎを、電子線の連続刺激に
よる温度上昇化、熱還元による結晶表面の化学変化を抑
制するからである。結晶表面にある付活剤Ｚｎが、Ｓｉ
Ｏ２またはＡ （Ｌ ２０３によって、電子線の連続刺
激から防御することによると考えられる。
【好ましい実施例］
以下、実施例について説明するが、本発明は実施例に限
られるものではない。
［実施例１］
蛍光体原料として、
Ｚ ｎ Ｃ０ａ−１ｋ ｇ
ＺｎＳ・・・・・・・・・・・・５ｇ
混合する。
混合物を石英ルツボに充填し、ルツボを焼成炉に入れて
焼成する。
焼成工程においては、焼成炉内に、体積比で、９８：２
の比率で、窒素ガスと水素ガスとが混合された気体を供
給し、この混合ガス雰囲気で、２時間還元焼成する。焼
成温度は、８５０’Ｃとした。
その後、焼成品をルツボから取り出してほぐし、水洗し
後、分離して乾燥する。
得られた自己付活酸化亜鉛蛍光体は、１０ｐｐｍのイオ
ウ（Ｓ）を含有していた。また。この蛍光体は、ＺｎＳ
を添加しない以外、同様にして焼成した従来のＺｎＯ：
Ｚｎ蛍光体に比較して、相対発光輝度が約６０％向上し
た。相対発光輝度は、低速電子線デイマンタプル装置に
て５０Ｖ、１ｍＡの条件にて輝度を測定した。
［実施例２〜８］
Ｚ ｎ Ｓの添加量を調整する以外、実施例１と同様に
してＺｎＯ：Ｚｎ蛍光体を製造した。
ＺｎＳの添加量は、Ｚ ｎ ＣＯ３を１ｋｇに対して、
Ｉｇ、３ｇ、１０ｇ、１５ｇ、１７ｇ、２０ｇ、２５ｇ
、３０ｇとした。
得られたＺｎＯ：Ｚｎ蛍光体は、第１表に示すように、
順番にイオウ（Ｓ）の含有量が、１． ｌｐｐｍ、５
．２ｐｐｍ、２１ ｐｐｍ、３２ｐｐｍ。
４２ｐｐｍ％ ５５ ｐ ｐ ｍ、 ７５ ｐ ｐ ｍ
、 ９３１） ｐｍとなり、相対発光輝度が順番に、
１１０％、１５５％、１７７％、１８０％、１７２％、
１５２％１２３％、１０５％となった。
［実施例１０］
実施例１で得られた蛍光体に下記の処理を施して、バー
ニング特性を改善した。
■ 水洗後、フルイにかけたＺｎＯ： Ｚｎ蛍光第１表
第２表
５０ＶＩｍＡＩ２０時間
体６００ｇを、１． ５αの水に懸濁させる。
■ アルミナ変成型コロイダルシリカ（商品名「ルドッ
クスＡＭＪデュポン社製−濃度２０重量％）１．３ｍｊ
ｌと、２％のＺｎ５Ｏａ溶液１．６ｍｌとを、■の蛍光
体懸濁液に滴下し、アルミナ変成型コロイダルシリカを
蛍光体の表面に付着した。
分離乾燥した蛍光体を分析した結果、この蛍光体は、０
．０３９重量％のシリカ、０．００１重量％のアルミナ
を含有し、両者で０．０４重量％の付着量であった。
この蛍光体は、１２０時間のバーニング試験の後の発光
輝度が９５％もあり、わずかに５％しか輝度が低下しな
かった。バーニング試験は、低速電子線デイマンタプル
装置にて５０Ｖ−１ｍＡの条件で電子線刺激した。
［実施例１１〜１５コ
蛍光体に対するアルミナ変成型コロイダルシリカの混合
量を調整する以外、実施例１０と同様にして、蛍光体の
表面をコーティングした。
得られた蛍光体の、シリカとアルミナの総量を測定し、
また、バーニング後の発光輝度を測定した。測定結果を
第２表に示す。ただし、バーニング試験後の輝度は、バ
ーニング試験萌の輝度を基準にしている。
この表から明かなように、アルミナ変成型コロイダルシ
リカを使用して表面コーティングされたＺｎＯ：Ｚｎ蛍
光体は、優れたバーニング特性を示す。付着量が０．０
４重量％以下の範囲では、付着量が増加するとバーニン
グ特性も向上する。
０．０４重量％以上になると、バーニング特性は次第に
低下する。
また、コロイダルシリカに加えアルミナゾルを混合し、
表面コーティングしても効果はある。The most important factors for increasing the luminance of a zinc oxide phosphor are the concentration of luminescent centers and the geometrical arrangement of luminescent centers within the crystal. If there are too many or too few luminescent centers, the luminance will decrease. This is because if there are too many luminescent centers, concentration quenching will occur, whereas if there are too few luminescent centers, the luminous efficiency will decrease. It has also been found that high luminance cannot be obtained if the geometrical arrangement of the luminescent centers within the crystal is biased compared to the ideal crystal arrangement. If the geometrical arrangement of the luminescent centers can be controlled, high luminous efficiency can be maintained. As a result of repeated various experiments, the inventors found that ZnO:Zn
We have discovered that by introducing an appropriate amount of sulfur into the matrix of the phosphor, it is possible to control the luminous efficiency, as well as the amount of luminescent centers and their arrangement within the crystal. Sulfur (S) functions to help reduce the amount of zinc that acts as an activator and to properly arrange the activator within the crystal, and some of it also
O: Contained in the crystal structure of Z, n. The content of sulfur (S) is preferably adjusted to 1100 PP or less. More preferably, when the sulfur (S) content is adjusted to a range of 5 to 50 ppm, ZnO:
Zn phosphor has the highest luminous efficiency. Figure 1 shows the relationship between Zn0:Zn and the sulfur (S) content.
It shows the relative luminance of the phosphor. As shown in this figure, in a range where the sulfur (S) content is loppm or less, the luminance increases as the sulfur (S) content increases. When the sulfur (S) content becomes 10 pptn or more, the luminance gradually decreases. However, Figure 1 shows ZnO:Zn which does not contain sulfur (S).
Relative luminance is measured with the luminance of the phosphor as 100%. In addition, Zn is a self-activating zinc oxide phosphor and is coated with a surface treatment substance such as alumina-deformed colloidal silica.
O:Zn phosphors can also be used in fluorescent display tubes to significantly improve lifetime characteristics. The reason for this is not entirely clear, but it is because 5102 and AQ203 on the surface suppress the temperature rise of Zn on the crystal surface due to continuous stimulation with electron beams and chemical changes on the crystal surface due to thermal reduction. The activator Zn on the crystal surface is Si
This is thought to be due to protection from continuous stimulation of electron beams by O2 or A (L 203). [Preferred Examples] Examples will be described below, but the present invention is not limited to the Examples. [Implementation] Example 1] Mix 5 g of Z n C0a-1 kg ZnS as a phosphor raw material. The mixture is filled into a quartz crucible, and the crucible is placed in a firing furnace and fired. Firing In the process, a volume ratio of 98:2 is placed in the firing furnace.
A gas mixture of nitrogen gas and hydrogen gas is supplied at a ratio of 1, and reduction firing is performed for 2 hours in this mixed gas atmosphere. The firing temperature was 850'C. Thereafter, the fired product is removed from the crucible, loosened, washed with water, separated and dried. The resulting self-activated zinc oxide phosphor contained 10 ppm sulfur (S). Also. This phosphor is ZnS
Conventional ZnO fired in the same manner except without adding:
Relative luminance was improved by about 60% compared to Zn phosphor. The relative luminance was measured using a low-speed electron beam damantuple device under conditions of 50 V and 1 mA. [Examples 2 to 8] ZnO:Zn phosphors were manufactured in the same manner as in Example 1 except that the amount of ZnS added was adjusted. The amount of ZnS added per 1 kg of Z n CO3 is
Ig, 3g, 10g, 15g, 17g, 20g, 25g
, 30g. The obtained ZnO:Zn phosphor was as shown in Table 1.
In order, the sulfur (S) content is 1. lppm, 5
．． 2ppm, 21ppm, 32ppm. 42 ppm% 55 ppm, 75 ppm
, 931) pm, and the relative luminance becomes, in order,
110%, 155%, 177%, 180%, 172%,
The percentages were 152%, 123%, and 105%. [Example 10] The phosphor obtained in Example 1 was subjected to the following treatment to improve its burning characteristics. ■ After washing with water, ZnO was passed through a sieve: Zn fluorescence Table 1 Table 2 Suspend in 5α water. ■ Alumina modified colloidal silica (product name: Ludox AMJ, manufactured by DuPont - concentration 20% by weight) 1.3 mj
1 and 1.6 ml of 2% Zn5Oa solution were dropped onto the phosphor suspension (2) to adhere alumina-modified colloidal silica to the surface of the phosphor. As a result of analyzing the separated and dried phosphor, this phosphor was found to be 0.
．． It contained 0.039% by weight of silica and 0.001% by weight of alumina, and the adhesion amount of both was 0.04% by weight. This phosphor had a luminance of 95% after a 120-hour burning test, and the luminance decreased by only 5%. In the burning test, electron beam stimulation was performed under the conditions of 50 V and 1 mA using a low-speed electron beam damantuple device. [Examples 11 to 15] The surface of the phosphor was coated in the same manner as in Example 10, except that the amount of alumina-modified colloidal silica mixed with the phosphor was adjusted. Measure the total amount of silica and alumina in the obtained phosphor,
In addition, the luminance after burning was measured. The measurement results are shown in Table 2. However, the brightness after the burning test is based on the brightness of the burning test. As is clear from this table, the ZnO:Zn phosphor surface-coated using alumina-modified colloidal silica exhibits excellent burning properties. Adhesion amount is 0.0
In the range of 4% by weight or less, as the amount of adhesion increases, the burning characteristics also improve. When the amount exceeds 0.04% by weight, the burning properties gradually decrease. In addition, in addition to colloidal silica, alumina sol is mixed,
Surface coating is also effective.
第１図はイオウ含有量に対する輝度の変化を示すグラフ
である。FIG. 1 is a graph showing changes in brightness with respect to sulfur content.
Claims (2)
有することを特長とする自己付活酸化亜鉛蛍光体。(1) A self-activating zinc oxide phosphor characterized by containing 1 to 100 PPm of sulfur in the phosphor matrix.
表面処理物質にアルミナ変成型コロイダルシリカが使用
され、その付着量が０．００１〜０．１重量％である請
求項１記載の自己付活酸化亜鉛蛍光体。(2) The surface of the phosphor is coated with a surface treatment substance,
2. The self-activating zinc oxide phosphor according to claim 1, wherein alumina-modified colloidal silica is used as the surface treatment substance, and the amount of the attached amount is 0.001 to 0.1% by weight.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1050456A JP2535218B2 (en) | 1989-03-01 | 1989-03-01 | Self-activated zinc oxide phosphor |
| JP5160378A JPH07116425B2 (en) | 1989-03-01 | 1993-06-03 | Method for producing self-activated zinc oxide phosphor |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1050456A JP2535218B2 (en) | 1989-03-01 | 1989-03-01 | Self-activated zinc oxide phosphor |
| JP5160378A JPH07116425B2 (en) | 1989-03-01 | 1993-06-03 | Method for producing self-activated zinc oxide phosphor |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5160378A Division JPH07116425B2 (en) | 1989-03-01 | 1993-06-03 | Method for producing self-activated zinc oxide phosphor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02228389A true JPH02228389A (en) | 1990-09-11 |
| JP2535218B2 JP2535218B2 (en) | 1996-09-18 |
Family
ID=26390926
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1050456A Expired - Lifetime JP2535218B2 (en) | 1989-03-01 | 1989-03-01 | Self-activated zinc oxide phosphor |
| JP5160378A Expired - Lifetime JPH07116425B2 (en) | 1989-03-01 | 1993-06-03 | Method for producing self-activated zinc oxide phosphor |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5160378A Expired - Lifetime JPH07116425B2 (en) | 1989-03-01 | 1993-06-03 | Method for producing self-activated zinc oxide phosphor |
Country Status (1)
| Country | Link |
|---|---|
| JP (2) | JP2535218B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109415627A (en) * | 2016-06-30 | 2019-03-01 | 堺化学工业株式会社 | Zinc oxide fluorophor and its manufacturing method |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19626219A1 (en) * | 1996-06-29 | 1998-01-02 | Philips Patentverwaltung | Phosphor preparation with SiO¶2¶ particle coating |
| US7535162B2 (en) | 2003-04-30 | 2009-05-19 | National Institute For Materials Science | Zinc oxide phosphor, process for producing the same and light emitting device |
| CN101775278B (en) * | 2010-01-28 | 2013-10-16 | 海洋王照明科技股份有限公司 | Colloid-coating fluorescent powder and preparation method thereof |
| CN102234512B (en) * | 2010-04-30 | 2014-03-12 | 海洋王照明科技股份有限公司 | Preparation method of modified luminescent material |
-
1989
- 1989-03-01 JP JP1050456A patent/JP2535218B2/en not_active Expired - Lifetime
-
1993
- 1993-06-03 JP JP5160378A patent/JPH07116425B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109415627A (en) * | 2016-06-30 | 2019-03-01 | 堺化学工业株式会社 | Zinc oxide fluorophor and its manufacturing method |
| US11312902B2 (en) | 2016-06-30 | 2022-04-26 | Sakai Chemical Industry Co., Ltd. | Zinc oxide phosphor and method for producing same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07116425B2 (en) | 1995-12-13 |
| JPH0693259A (en) | 1994-04-05 |
| JP2535218B2 (en) | 1996-09-18 |
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