KR930004147B1 - Stabilization alkaline earth sulfuret fluorescent - Google Patents
Stabilization alkaline earth sulfuret fluorescent Download PDFInfo
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- KR930004147B1 KR930004147B1 KR1019890020523A KR890020523A KR930004147B1 KR 930004147 B1 KR930004147 B1 KR 930004147B1 KR 1019890020523 A KR1019890020523 A KR 1019890020523A KR 890020523 A KR890020523 A KR 890020523A KR 930004147 B1 KR930004147 B1 KR 930004147B1
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- alkaline earth
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- higher fatty
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- C—CHEMISTRY; METALLURGY
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/56—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing sulfur
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Abstract
Description
본 발명은 알칼리토류 유화물(流化物) 형광체의 안정화법에 관한 것으로, 특히 고급지방산염으로 처리하는 알칼리토류 유화물 형광체의 안정화법에 관한 것이다.The present invention relates to a method for stabilizing alkaline earth emulsion phosphors, and more particularly to a method for stabilizing alkaline earth emulsion phosphors treated with higher fatty acid salts.
일반적으로, 알칼리토류 유화물 형광체를 안정화시키는 방법은, 크게 무기물처리에 의한 안정화법과 유기물처리에 의한 안정화법으로 구분되는데, 무기물 처리에 의한 안정화법의 경우 SiO2(산화규소), Na2P2O7(이중인산나트륨 또는 피로인산나트륨) 및 CaC2O4(산화탄화칼슘)등이나 그 염을 이용하여 안정화시키고, 유기물처리에 의한 안정화법의 경우, 수용성 고분자등을 이용하여 표면을 코-팅(Coating) 처리하므로써 형광체 표면을 H2O 또는 CO2로부터 보호하였다.Generally, stabilization of alkaline earth emulsion phosphors is classified into stabilization by inorganic treatment and stabilization by organic treatment. For stabilization by inorganic treatment, SiO 2 (silicon oxide), Na 2 P 2 O 7 (stabilized with sodium bicarbonate or sodium pyrophosphate), CaC 2 O 4 (calcium oxide), or a salt thereof, and in the case of stabilization by organic matter treatment, coating the surface with a water-soluble polymer or the like. The phosphor surface was protected from H 2 O or CO 2 by (Coating) treatment.
그러나 상기한 무기물 처리에 의한 안정화 방법의 경우 처리후에도 잔류무기물이 형광체의 표면에 계속하여 존재하게 되므로 형광체의 발광휘도 특성을 저하시킨다는 문제점이 제기되었고, 유기물처리에 의한 안정화법의 경우에는 수용성 고분자 입자들이 형광체 표면상에 균일하게 코팅되지 않는다는 문제점이 제기되었다.However, in the case of the stabilization method by the inorganic treatment, there is a problem that deteriorates the emission luminance characteristics of the phosphor because residual inorganic matter continues to exist on the surface of the phosphor even after treatment, and in the case of stabilization by the organic treatment, water-soluble polymer particles The problem arises that they are not uniformly coated on the phosphor surface.
본 발명은 이와 같은 문제점을 개선하기 위하여 알칼리토류 유화물 형광체에 대해 RCOONa 등의 고급지방산염을 반응시켜 고급지방산염이 불안정환 형광체 표면을 감싸주게 하므로써 안정화시키거나 또는 K2O·SiO2및 각종 Ca염 침전물을 알칼리토류 형광체에 형성시킨 후, 그 미반응 부분의 고급지방산염을 이용하여 형광체 표면을 피막 처리하므로써 안정화시켜 H2O 및 CO2로부터 상기 알칼리토류 형광체를 보호하고자 하는데 목적이 있다.In order to solve the above problems, the present invention stabilizes by reacting higher fatty acid salts such as RCOONa with alkaline earth emulsion phosphors to cover the surface of unstable ring phosphors, or K 2 O.SiO 2 and various Ca. A salt precipitate is formed on the alkaline earth phosphor, and then stabilized by coating the surface of the phosphor using the higher fatty acid salt of the unreacted portion to protect the alkaline earth phosphor from H 2 O and CO 2 .
본 발명을 상세히 설명하면 다음과 같다.The present invention is described in detail as follows.
본 발명은, 고급지방산 나트륨((CH2)nCOONa)이나 각염의 수용액이 Ca+2이온과 결합하여 침전을 생성하거나 또 소수성(疎水性)의 고급지방산이 기름과 잘 결합하는 원리를 이용하여, 알칼리토류 유화물 형광체의 표면에 고급지방산 알칼리토류염을 형성시켜 상기 알칼리토류 유화물 형광체를 안정화시킨다.The present invention utilizes the principle that the aqueous solution of higher fatty acid sodium ((CH 2 ) n COONa) or salt salt is combined with Ca +2 ions to form a precipitate, or hydrophobic higher fatty acid is well combined with oil. The alkaline earth emulsion phosphor is stabilized by forming a higher fatty acid alkaline earth salt on the surface of the alkaline earth emulsion phosphor.
이를 위하여, 본 발명에서는, 일정량의 알칼리토류 유화물 형광체를 순수에 넣고 교반하면서, 잘 분산시켜 형광체 수용액을 제조한 다음, 고급지방산염 일정량을 물에 녹여 고급지방산염 수용액을 제조한 후, 상기 형광체 수용액에 고급지방산염 수용액을 짧은 시간동안 반응시켜 형광체 표면에 (RCOO)2Ca(고급지방산 칼슘)을 형성시켜 소수성의 알칼리토류 유화물 형광체를 얻는다. 상기 반응은 다음과 같다.To this end, in the present invention, a predetermined amount of alkaline earth emulsion phosphor is added to pure water, stirred, and dispersed well to prepare an aqueous solution of phosphor, and then, a predetermined amount of higher fatty acid salt is dissolved in water to prepare an aqueous solution of higher fatty acid salt. (RCOO) 2 Ca (high fatty acid calcium) is formed on the surface of the phosphor by reacting the fatty acid aqueous solution for a short time to obtain a hydrophobic alkaline earth emulsion phosphor. The reaction is as follows.
CaS+RCOONa+2H2O→(RCOO)2Ca+H2S+2NaOHCaS + RCOONa + 2H 2 O → (RCOO) 2 Ca + H 2 S + 2NaOH
이와같이 형광체 표면을 안정화시킨 다음, 다시 친수성의 알칼리토류 형광체를 얻고자 하는 경우에는, 상기한 소수성 알칼리토류 유화물 형광체에 대하여 2차 고급지방산염 처리한다.When the surface of the phosphor is stabilized as described above, and the hydrophilic alkaline earth phosphor is to be obtained again, the above-mentioned hydrophobic alkaline earth emulsion phosphor is subjected to secondary higher fatty acid salt treatment.
이상과 같은 본 발명의 효과로는 알칼리토류 유화물 형광체의 불안정한 표면을 고급지방산염으로 감싸주게 됨으로써, H2O 및 CO2로부터 형광체 표면을 보호하고, 고급지방산염을 사용함으로써 소성공정에 의한 형광체의 발광휘도 저하를 방지할 수 있으며, 형광체에 대하여 친수성 및 소수성의 특성을 임의로 적용시킬 수 있다는 잇점이 있다.The effects of the present invention as described above are to wrap the unstable surface of the alkaline earth emulsion phosphor with a higher fatty acid salt, thereby protecting the surface of the phosphor from H 2 O and CO 2 , and by using a higher fatty acid salt of the phosphor by the firing process It is possible to prevent the emission luminance from being lowered and to apply hydrophilicity and hydrophobicity to the phosphors arbitrarily.
다음은 본 발명의 실시예이다.The following is an embodiment of the present invention.
[실시예 1]Example 1
알칼리토류 유화물 형광체로서 CaS 100g을 순수 500cc에 넣고 잘 분산시켜 형광체 수용액을 제조한 다음, 5g의 고급지방산염을 순수에 녹여 만든 고급지방산염 수용액을 상기한 형광체 수용액에 첨가하여 반응시켜, 다음식에 따른 고급지방산 칼슘을 형광체 표면에 형성시켜 소수성의 알칼리토류 유화물 형광체를 얻었다.CaS 100g as an alkaline earth emulsion phosphor was added to 500cc of pure water to disperse well to prepare an aqueous solution of phosphor, and then an aqueous solution of higher fatty acid salt prepared by dissolving 5g of higher fatty acid salt in pure water was added to the aqueous solution of phosphor and reacted. The higher fatty acid calcium was formed on the surface of the phosphor to obtain a hydrophobic alkaline earth emulsion phosphor.
CaS+RCOONa+2H2O→(RCOO)2Ca+H2S+2NaOHCaS + RCOONa + 2H 2 O → (RCOO) 2 Ca + H 2 S + 2NaOH
이렇게 안정화된 형광체 표면은 소수성으로서 H2O 및 CO2로부터 보호됨에 따라 발광휘도의 저하가 발생하지 않았다.As the stabilized phosphor surface is hydrophobic and protected from H 2 O and CO 2 , no decrease in emission luminance occurred.
[실시예 2]Example 2
28%의 K2O·SiO2수용액 5ml을 가한 순수 500cc에 CaS 100g을 넣고 교반하여 1차 피복 처리한 다음 건조시키고, 이를 다시 500cc의 순수속에서 고급지방산염 3g으로 2차 피복처리하여 상기 알칼리토류 유화물 형광체를 안정화시켰다. 이렇게 안정화시킨 형광체는 다시 친수성으로 복귀되었다.100 g of CaS was added to 500 cc of pure water added with 5 ml of 28% K 2 O.SiO 2 aqueous solution, followed by stirring. The primary coating was then dried, followed by secondary coating with 3 g of higher fatty acid salt at 500 cc of pure water. The earth emulsion phosphor was stabilized. The stabilized phosphor was returned to hydrophilicity again.
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KR1019890020523A KR930004147B1 (en) | 1989-12-30 | 1989-12-30 | Stabilization alkaline earth sulfuret fluorescent |
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KR1019890020523A KR930004147B1 (en) | 1989-12-30 | 1989-12-30 | Stabilization alkaline earth sulfuret fluorescent |
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KR910012188A KR910012188A (en) | 1991-08-07 |
KR930004147B1 true KR930004147B1 (en) | 1993-05-21 |
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