KR930005692B1 - Red-luminous phosphor and preparation thereof - Google Patents

Red-luminous phosphor and preparation thereof Download PDF

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KR930005692B1
KR930005692B1 KR1019900002833A KR900002833A KR930005692B1 KR 930005692 B1 KR930005692 B1 KR 930005692B1 KR 1019900002833 A KR1019900002833 A KR 1019900002833A KR 900002833 A KR900002833 A KR 900002833A KR 930005692 B1 KR930005692 B1 KR 930005692B1
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oxide
phosphor
red light
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lanthanum
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마재중
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삼성전관 주식회사
김정배
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    • C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
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Abstract

The red light-emitting fluorescent material composed of (YxLaySiz)2O3:Eu [x,y,z 0; x+y+z = 1 is produced by dry mixing 100 g yttrium oxide (Y2O3), 8 g lanthanum oxide (La2O3), 4.5 g silicon oxide (SiO2), 5.5 g europium oxide (Eu2O3), 0.5 g boric acid (H3BO3) and 1 g sodium carbonate (Na2CO3) with 1 g sodium fluoride, and (b) firing the mixture in the heat resistant container at 1200-1600 deg.C for 2 hr. The fluorescent material has a good luminance.

Description

적색 발광 형광체 및 그의 제조방법Red Light Emitting Phosphor and Manufacturing Method Thereof

제1도는, 본 발명의 적색 발광 형광체의 발광 스펙트럼을 나타낸 특성도.1 is a characteristic diagram showing the emission spectrum of the red light-emitting phosphor of the present invention.

제2도 및 제3도는 종래의 적색 발광 형광체의 전자 현미경(SEM)사진.2 and 3 are electron microscopy (SEM) photographs of conventional red light-emitting phosphors.

제4도는, 본 발명에 의한 적색 발광 형광체의 전자 현미경(SEM)사진이다.4 is an electron micrograph (SEM) photograph of the red light-emitting phosphor according to the present invention.

본 발명은 유로피움 부활, 이트륨옥사이드(이하 "Y2O3: Eu"로 표기함)의 적색발광 형광체 및 그의 제조방법에 관한 것으로서, 더욱 상세하게는 기존의 Y2O3: Eu 형광체에 란탄(La)과 실리콘(Si)을 첨가하여, 좌표변화는 발생하지 않고, 입자모양이 균일하고 발광휘도가 향상된 적색발광 형광체 및 그의 제조방법에 관한 것이다.The present invention relates to a red light-emitting phosphor of europium reactivation, yttrium oxide (hereinafter referred to as "Y 2 O 3 : Eu"), and a method of manufacturing the same, and more particularly, to lanthanum in a conventional Y 2 O 3 : Eu phosphor. (La) and silicon (Si) are added, and a coordinate change does not occur, and it is related with the red luminescent fluorescent substance which was uniform in particle shape, and improved luminescence brightness, and its manufacturing method.

종래의 적색 발광 형광체는 산화이트륨(Y2O3)모체에 유로피움(Eu)을 부활시킨 것으로서, 고연색 램프용과 Color 투사관용 적색 발광 형광체로 통상 사용되어 왔다.Conventional red light-emitting phosphors have been revived europium (Eu) in a yttrium (Y 2 O 3 ) matrix, and have been commonly used as red light-emitting phosphors for high color rendering lamps and color projection tubes.

그러나, 상기한 바와같은 방법으로 제조된 종래의 형광체는 제2도 및 제3도에 나타낸 바와같이 입자모양이 불균일하여 형광막 제조시 막상태와 램프용으로 사용하기 위하여 형광체를 도포할때도 막 상태가 균일하지 않아 발광휘도가 저하 하는 문제점이 있었다.However, the conventional phosphor prepared by the method as described above has a non-uniform particle shape as shown in FIGS. 2 and 3, so that even when the phosphor is coated for use in a film state and a lamp in the manufacture of the phosphor film There is a problem in that the luminance is not uniform because the luminance is not uniform.

본 발명은, 상기한 바와같은 종래 기술의 문제점을 해결하기 위하여 안출된 것으로서, 본 발명의 목적은 형광체의 입자모양이 균일하여, 형광막 형성시 발광 휘도가 향상되는 적색 발광 형광체를 제공하는데 있다.The present invention has been made to solve the problems of the prior art as described above, an object of the present invention is to provide a red light emitting phosphor in which the particle shape of the phosphor is uniform, the light emission luminance is improved when forming a fluorescent film.

상기한 바와같은 목적을 달성하기 위하여, 본 발명은 기존이 형광체의 조성식 "Y2O3: Eu"중 Y2O3의 일부를 란탄(Li)과 실리콘(Si)을 치환하여, 형광체를 실리콘(Si)으로 코팅함으로써, 휘도를 향상시키고 입자모양을 균일하게 한 조성식이 (Yx Lay Siz)2O3: Eu(단, 식중에서 x+y+z=1임)로 나타내어지는 적색 발광 형광체를 제공한다.In order to achieve the object as described above, the present invention is to replace the lanthanum (Li) and silicon (Si) of a portion of the Y 2 O 3 in the composition formula "Y 2 O 3 : Eu" of the phosphor, and the phosphor is silicon By coating with (Si), a red light-emitting phosphor represented by the composition formula (Yx Lay Siz) 2 O 3 : Eu (where x + y + z = 1) in which the brightness was improved and the particle shape was uniform was obtained. to provide.

본 발명에서 제조하고자 하는 고연색 램프와 칼라 투사형 영상장치용 적색발광 형광체는, 조성식이 Y2O3: Eu로 나타내어지는 종래의 적색 발광 형광체에, La 및 Si를 첨가해 색좌표 이동은 발생시키지 않고, 기존의 Y2O3: Eu 형광체 보다 향상된 특성을 가지면서, 또한 휘도도 향상되는 것이다.The high color lamp and the red light emitting phosphor for a color projection imaging apparatus to be manufactured according to the present invention do not generate color coordinate shift by adding La and Si to a conventional red light emitting phosphor whose composition formula is represented by Y 2 O 3 : Eu. In addition, the luminance is also improved while improving the characteristics of the conventional Y 2 O 3 : Eu phosphor.

본 발명의 적색 발광 형광체는 Y2O3와 Eu2O3를 사용하고 여기에 H3BO3, Na2CO3및 NaF를 사용하여 적색 형광체를 제조하는 종래의 방법을 개량하여, 여기에 La2O3및 SiO2를 첨가한후, 이들 전체를 건식 혼합하고 소성함으로써 얻어질 수 있다.The red light-emitting phosphor of the present invention uses Y 2 O 3 and Eu 2 O 3 , and the conventional method of manufacturing the red phosphor by using H 3 BO 3 , Na 2 CO 3, and NaF is improved by adding La After addition of 2 O 3 and SiO 2 , all of them can be obtained by dry mixing and firing.

다음에, 본 발명의 실시예를 기재한다.Next, examples of the present invention will be described.

[실시예 1]Example 1

원료조성Raw material composition

산화이트륨(Y2O3) : 100gYttrium oxide (Y 2 O 3 ): 100 g

산화란탄(La2O3) : 8gLanthanum oxide (La 2 O 3 ): 8g

산화실리콘(SiO2) : 4.5gSilicon Oxide (SiO 2 ): 4.5g

산화유로피움(Eu2O3) : 5.5gEuropium oxide (Eu 2 O 3 ): 5.5 g

붕산(H3BO3) : 0.5gBoric acid (H 3 BO 3 ): 0.5g

탄산나트륨(Na2CO3) : 1gSodium Carbonate (Na 2 CO 3 ): 1g

불화나트륨(NaF) : 1gSodium fluoride (NaF): 1 g

상기 원료를 건식혼합하여 내열성 용기에 충진하고 1200-1600℃ 사이에서 2시간 소성하여 본 발명의 형광체를 제조하였다.The raw materials were dry mixed, filled in a heat resistant container, and fired at 1200-1600 ° C. for 2 hours to prepare a phosphor of the present invention.

얻어진 형광체를 수차례 세정한 후에 건조하여 포탈(Photal)사의 "MCPD 100"을 이용하여 형광 특성을 평가하여, 하기 표에 나타내었다.The obtained phosphor was washed several times, dried, and evaluated for fluorescence using "MCPD 100" manufactured by Portal, which is shown in the following table.

[실시예 2]Example 2

원료조성Raw material composition

산화이트륨(Y2O3) : 100gYttrium oxide (Y 2 O 3 ): 100 g

산화란탄(La2O3) : 9gLanthanum oxide (La 2 O 3 ): 9g

산화실리콘(SiO2) : 5gSilicon Oxide (SiO 2 ): 5g

산화유로피움(Eu2O3) : 5.5gEuropium oxide (Eu 2 O 3 ): 5.5 g

붕산(H3BO3) : 0.5gBoric acid (H 3 BO 3 ): 0.5g

탄산나트륨(Na2CO3) : 1gSodium Carbonate (Na 2 CO 3 ): 1g

불화나트륨(NaF) : 0.5gSodium fluoride (NaF): 0.5 g

상기 원료조성을 갖는 점외에는 실시예 1과 같은 방법으로 실시하여 본 발명의 형광체를 얻었다.The phosphor of the present invention was obtained in the same manner as in Example 1 except for the above point having the raw material composition.

또한 실시예 1과 동일한 방법으로 형광체 특성을 평가하여 하기표에 나타내었다.In addition, the phosphor properties were evaluated in the same manner as in Example 1, and are shown in the following table.

[실시예 3]Example 3

산화이트륨(Y2O3) : 100gYttrium oxide (Y 2 O 3 ): 100 g

산화란탄(La2O3) : 10gLanthanum oxide (La 2 O 3 ): 10g

산화실리콘(SiO2) : 5.5gSilicon Oxide (SiO 2 ): 5.5g

산화유로피움(Eu2O3) : 5.5gEuropium oxide (Eu 2 O 3 ): 5.5 g

붕산(H3BO3) : 0.5gBoric acid (H 3 BO 3 ): 0.5g

탄산나트륨(Na2CO3) : 1gSodium Carbonate (Na 2 CO 3 ): 1g

불화나트륨(NaF) : 0.5gSodium fluoride (NaF): 0.5 g

상기 원료조성을 갖는 점외에는 실시예 1과 같은 방법으로 실시하여 본 발명의 형광체를 얻었다.The phosphor of the present invention was obtained in the same manner as in Example 1 except for the above point having the raw material composition.

[표][table]

Figure kpo00001
Figure kpo00001

표에서 알 수 있는 바와같이 La와 Si를 첨가해 제조한 본 발명의 형광체는 종래의 Y2O3: Eu 형광체 보다 향상된 휘도를 보이고 있다.As can be seen from the table, the phosphor of the present invention prepared by adding La and Si shows improved luminance than the conventional Y 2 O 3 : Eu phosphor.

또한, 상기 실시예 1-3에 의한 본 발명의 적색 발광 형광체를 254㎚의 자외선으로 여기 하였을때의 발광 스펙트럼을 측정한 결과를 제1도에 나타내었다.Fig. 1 shows the results of measuring the emission spectrum when the red light-emitting phosphor of the present invention according to Example 1-3 was excited with 254 nm ultraviolet.

제1도로부터 알 수 있는 바와같이 본 발명의 형광체는 611㎚에 주 피크를 갖는 적색 발광을 나타내고 있다.As can be seen from FIG. 1, the phosphor of the present invention exhibits red light emission having a main peak at 611 nm.

또한, 본 발명의 형광체는, 제4도의 전자 형미경 사진으로부터 확인되는 바와같이, 입자모양이 균일함을 알 수 있다.In addition, it can be seen that the phosphor of the present invention has a uniform particle shape as confirmed from the electron micrograph of FIG.

상기의 바와같이, 본 발명의 적색 발광 형광체는 기존의 형광체(Y2O3: Eu)보다 향상된 발광특성을 나타내며 특히 고연색 램프용으로 적용시 발광휘도가 우수하고 또한 형광막의 균일성이 보장되는 등의 잇점이 있다.As described above, the red light-emitting phosphor of the present invention exhibits improved light emission characteristics than the conventional phosphors (Y 2 O 3 : Eu), and especially when applied for high color lamps, the light emission luminance is excellent and the uniformity of the fluorescent film is guaranteed. This has the advantage.

Claims (3)

Y2O3: Eu 적색 발광 형광체에 있어서의 모체 물질인 이트륨(Y)이, 란탄(La)와 실리콘(Si)로 미량 치환된 조성식(Yx Lay Siz)2O3: Eu로 나타내어지는 적색 발광 형광체. (단, 상기식중 x,y,z≠0, x+y+z=1임.)Y 2 O 3 : Red luminescence represented by compositional formula (Yx Lay Siz) 2 O 3 : Eu in which yttrium (Y), which is a parent material in the Eu red light-emitting phosphor, is substituted with a small amount of lanthanum (La) and silicon (Si) Phosphor. (Wherein x, y, z ≠ 0, x + y + z = 1) 산화이트륨(Y2O3) 및 산화유로피움(Eu2O3)을 주원료물질로 하는 적색 발광 형광체에 제조 방법에 있어서, 원료 물질로서 산화란탄(La2O3) 및 산화실리콘(SiO2)를 첨가하는 것을 특징으로 하는 조성식(Yx Lay Siz)2O3: Eu로 나타내어지는 적색 발광 형광체의 제조방법. (단 상기식중 x,y,z≠0, x+y+z=1임.)In the red luminescent phosphor containing yttrium oxide (Y 2 O 3 ) and europium oxide (Eu 2 O 3 ) as main raw materials, lanthanum oxide (La 2 O 3 ) and silicon oxide (SiO 2 ) as raw materials Method for producing a red light-emitting phosphor represented by the composition formula (Yx Lay Siz) 2 O 3 : Eu characterized in that the addition of. (Wherein x, y, z ≠ 0, x + y + z = 1) 제2항에 있어서, 산화란탄 및 산화 실리콘의 첨가량이 각각, 산화이트륨의 양에 대해 8-9중량%, 4.5-5중량%인 것을 특징으로 하는 조성식(Yx Lay Siz)2O3: Eu로 나타내어지는 적색 발광 형광체의 제조방법. (단 상기식중 x,y,z≠0, x+y+z=1임.)The compositional formula (Yx Lay Siz) 2 O 3 : Eu according to claim 2, wherein the amounts of added lanthanum oxide and silicon oxide are 8-9% by weight and 4.5-5% by weight, respectively, based on the amount of yttrium oxide. The manufacturing method of the red luminescent fluorescent substance shown. (Wherein x, y, z ≠ 0, x + y + z = 1)
KR1019900002833A 1990-02-28 1990-02-28 Red-luminous phosphor and preparation thereof KR930005692B1 (en)

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