KR100259420B1 - Electron emission material compounds of electrode for crt - Google Patents

Electron emission material compounds of electrode for crt Download PDF

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KR100259420B1
KR100259420B1 KR1019960048310A KR19960048310A KR100259420B1 KR 100259420 B1 KR100259420 B1 KR 100259420B1 KR 1019960048310 A KR1019960048310 A KR 1019960048310A KR 19960048310 A KR19960048310 A KR 19960048310A KR 100259420 B1 KR100259420 B1 KR 100259420B1
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metal
oxide
emitting material
cathode
electron emitting
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KR1019960048310A
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KR19980029069A (en
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이경상
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구자홍
엘지전자주식회사
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/14—Solid thermionic cathodes characterised by the material
    • H01J1/142—Solid thermionic cathodes characterised by the material with alkaline-earth metal oxides, or such oxides used in conjunction with reducing agents, as an emissive material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/26—Supports for the emissive material

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Abstract

PURPOSE: An electron radiation material composition is provided to prevent a lower layer of an electron radiation material from being separated from a gas metal by forming the electron radiation material of lower and upper layers. CONSTITUTION: A heater(101) for heating a cathode is inserted and installed in a cylindric sleeve(102), and a gas metal(103) is formed on an upper part of the sleeve. An electron radiation material(104) is coated on an upper surface of the gas metal. The electron radiation material(104) consists of a lower layer(104b) and an upper layer(104a) in order to prevent the electron radiation material from being separated from the gas metal. The lower layer(104b) is made of an alkali earth metal compound oxide comprising a barium oxide(BaO). The upper layer(104a) is made of an alkali earth metal compound oxide comprising a barium oxide(BaO), an active metal and a resolution metal oxide and is coated on the lower layer.

Description

음극선관용 음극의 전자방사물질 조성물Electron emitting material composition of cathode for cathode ray tube

본 발명은 음극선관에 관한 것으로서, 특히 전자방사물질을 상층과 하층으로 구성함으로써 음극구조체의 성능을 향상시키도록 한 음극선관용 음극의 전자방사물질 조성물에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube, and more particularly, to an electron emitting material composition for a cathode ray tube cathode that improves the performance of a cathode structure by constituting an electron emitting material as an upper layer and a lower layer.

종래 음극선관용 음극구조체는 제 1 도와 같이 음극 가열용 히터(1)가 삽입설치된 원통형의 슬리이브(2)와, 상기 슬리이브(2) 상부에 마그네슘(Mg), 실리콘(Si)등의 활성화금속이 미량함유되어 형성된 기체금속(3)과, 상기 기체금속(3)의 상단면에 도포된 전자방사물질(4)로 구비된다.The cathode structure for a conventional cathode ray tube has a cylindrical sleeve 2 in which a heater 1 for heating a cathode is inserted as shown in FIG. 1, and an active metal such as magnesium (Mg) or silicon (Si) And an electron emitting material 4 applied on the upper surface of the base metal 3. The electron emitting material 4 is formed of a base metal 3,

상기 전자방사물질(4)은 적어도 산화바륨(BaO)이 포함된 알칼리토류금속복합산화물에 산화스칸드늄(SC2O3)등과 같은 희토류금속산화물의 분해금속산화물이 함유되어 도포된다.The electron emitting substance (4) is at least barium oxide coating to decompose the metal oxide of the rare earth metal oxide is contained, such as (BaO) oxide Skan deunyum the alkaline earth metal composite oxide containing a (S C2 O 3).

이와 같이 구성된 종래 음극선관용 음극구조체의 슬리이브(2)내에 형성된 히터(1)에 전원이 공급되면 히터(1)가 발열하게 되고, 상기 히터(1)가 발열함에 따라 발생된 고온의 열은 기체금속(3)을 가열하게 되며, 가열된 상기 기체금속(3)에 의해 그 상단면에 도포된 전자방사물질(4)이 화학반응을 하며 전자가 생성된다.When electric power is supplied to the heater 1 formed in the sleeve 2 of the cathode structure for a conventional cathode ray tube constructed as described above, the heater 1 generates heat, and the heat of high temperature generated as the heater 1 generates heat, The metal 3 is heated, and the electron emitting material 4 applied on the upper surface thereof is chemically reacted by the heated gaseous metal 3 to generate electrons.

상기 기체금속(3)과 전자방사물질(4)의 화학반응은 다음과 같다.The chemical reaction between the base metal 3 and the electron emitting material 4 is as follows.

4BaO + Si(기체금속중) = 2Ba + Ba2SiO4(반응물질)4 BaO + Si (in the base metal) = 2 Ba + Ba 2 SiO 4 (reactant)

BaO + Mg(기체금속중) = Ba + MgO(반응물질)BaO + Mg (in the gaseous metal) = Ba + MgO (reactant)

Ba = Ba2++2e-(전자생성)Ba = Ba 2+ + 2e- (electron generation)

Sc2O3(분해금속산화물) + 3Mg = 2Sc + 3MgOSc 2 O 3 (decomposition metal oxide) + 3 Mg = 2 Sc + 3 MgO

3Ba2SiO4(반응물질) + 8Sc = 6Ba + 3Si + 4Sc2O3(반응물질분해)3Ba 2 SiO 4 (reactant) + 8Sc = 6Ba + 3Si + 4Sc 2 O 3 (decomposition of reactants)

Ba = Ba2++2e-(전자생성)Ba = Ba 2+ + 2e - (electron generation)

상기와 같은 분산형 음극의 화학반응은 기체금속(3)내에서 다량의 바륨이 검출됨으로써 확인되고 있으며, 고음극전류밀도가 가능한 것은 기체금속(3)간의 화학반응에 의한 반응물질로 생성된 바륨실리콘산화물이 산화스칸드늄에 의해 분해되기 때문이다.The chemical reaction of the dispersed negative electrode as described above is confirmed by detecting a large amount of barium in the gas metal 3, and the high negative electrode current density is possible because the barium This is because the silicon oxide is decomposed by the scandium oxide.

그러나 이러한 종래 음극선관용 음극구조체의 전자방사물질과 기체금속간의 화학반응에 의해 생성된 반응물질이 산화스칸드늄에 의해 분해되므로 전자방사물질은 기체금속과 강하게 결합되지 못하고 기체금속표면으로부터 탈락되는 문제점이 있었다.However, since the reaction material generated by the chemical reaction between the electron emitting material and the gas metal of the cathode structure for a conventional cathode ray tube is decomposed by the scandium oxide, the electron emitting material can not be strongly bonded to the gaseous metal, there was.

이와 같은 분산형 음극의 결점을 해결하기위해 기체금속상면에 접하여 산화바륨등과 같은 알칼리토류금속복합산화물의 전자방사물질을 도포하고 그 상면에 산화스칸드늄과 같은 희토류금속산화물질을 구비한 분산형 음극이 제안되었으나 음극전류밀도가 상기의 단층 전자방사물질층을 구비한 분산형 음극의 음극전류밀도에 미치지 못하는 문제점이 있었다.In order to solve the drawbacks of such a dispersed anode, an electron emitting material of an alkaline earth metal complex oxide such as barium oxide is applied on the upper surface of the base metal, and a dispersed type anode having a rare earth metal oxide material such as scandium oxide A negative electrode has been proposed, but the negative electrode current density has not reached the density of the negative electrode of the dispersed negative electrode having the above-described single-layered electron emitting material layer.

본 발명은 이러한 점을 감안하여 적어도 산화바륨(BaO)이 포함된 알칼리토류 금속복합산화물로 구성된 전자방사물질의 하층을 기체금속의 상단면에 도포하고, 적어도 산화바륨(BaO)이 포함된 알칼리토류금속복합산화물에 활성화금속과 분해금속산화물이 함유된 전자방사물질의 상층을 상기 전자방사물질의 하층 상단면에 도포함으로써, 전자방사물질이 기체금속으로부터 탈락되는 것을 방지하며, 고음극전류밀도를 가능하게하여 음극구조체의 성능을 향상시키는 데 그 목적이 있다.SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a method for manufacturing a semiconductor device, which comprises applying a lower layer of an electron-emitting material composed of an alkaline earth metal composite oxide containing at least barium oxide (BaO) It is possible to prevent the electron emitting material from falling off from the base metal by applying the upper layer of the electron emitting material containing the activating metal and the decomposed metal oxide to the upper surface of the lower layer of the electron emitting material, Thereby improving the performance of the negative electrode structure.

제1도는 종래 음극선관용 음극구조체의 단면도.1 is a cross-sectional view of a conventional cathode structure cathode structure;

제2도는 본 발명 음극선관용 음극구조체의 단면도.FIG. 2 is a sectional view of a cathode structure for a cathode ray tube of the present invention. FIG.

* 도면의 주요부분에 대한 부호의 설명DESCRIPTION OF THE REFERENCE NUMERALS

101 : 히터 102 : 슬리이브101: heater 102: sleeve

103 : 기체금속 104 : 전자방사물질103: gas metal 104: electron emitting material

104a : 상층 104b : 하층104a: upper layer 104b: lower layer

상기한 목적을 달성하기 위하여 본 발명은, 음극 가열용 히터가 삽입설치된 원통형의 슬리이브와, 상기 슬리이브 상부에 형성된 기체금속과, 상기 기체금속의 상단면에 도포된 전자방사물질로 구성된 음극선관용 음극구조체에 있어서, 상기 전자방사물질을 상기 기체금속의 상단면에 도포되며 전자방사물질이 기체금속으로 부터 탈락하는 것을 방지하는 산화바륨(BaO)이 포함된 알칼리토류금속복합산화물로 구비된 하층과, 상기 하층의 상단면에 도포되며 고음극전류밀도가 가능하도록 산화바륨이 포함된 알칼리토류금속복합산화물과 활성화금속 및 분해금속산화물로 구비된 상층으로 구비된 것을 특징으로 하는 음극선관용 음극의 전자방사물질 조성물을 제공한다.According to an aspect of the present invention, there is provided a cathode ray tube comprising: a cylindrical sleeve having a heater for heating a cathode inserted therein; a base metal formed on the upper portion of the sleeve; and a cathode ray tube A negative electrode structure comprising: a lower layer made of an alkaline earth metal complex oxide containing barium oxide (BaO) which is applied to the upper surface of the base metal and prevents the electron emitting material from falling off from the base metal; , An upper layer comprising an alkaline earth metal complex oxide containing barium oxide and an active metal and a decomposition metal oxide, which is applied to the upper surface of the lower layer and is capable of high cathode current density, characterized in that the electron emission Lt; / RTI >

이하에서는 상기의 목적을 달성하는 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

제 2 도는 본 발명에 의한 음극선관용 음극구조체의 구성도를 나타낸 것으로서, 음극 가열용 히터(101)가 삽입설치된 원통형의 슬리이브(102)와, 상기 슬리이브(102) 상부에 마그네슘(Mg), 실리콘(Si)등의 활성화금속이 미량함유되어 형성된 기체금속(103)과, 상기 기체금속(103)의 상단면에 도포된 전자방사물질(104)로 구성된다.FIG. 2 is a structural view of a cathode structure for a cathode ray tube according to the present invention. FIG. 2 is a sectional view of a cathode structure for a cathode ray tube according to the present invention, which includes a cylindrical sleeve 102 having a cathode heating heater 101 inserted therein, A gas metal 103 formed by containing a small amount of an activating metal such as silicon (Si), and an electron emitting material 104 applied on the upper surface of the substrate metal 103.

그리고 상기 전자방사물질(104)은 적어도 산화바륨(BaO)이 포함된 알칼리토류금속복합산화물로 구성되어 기체금속(103)의 상단면에 도포된 하층(104b)과, 상기 하층(104b)의 상단면에 적어도 산화바륨이 포함된 알칼리토류금속복합산화물에 활성화금속과 분해금속산화물이 함유되어 도포된 상층(104a)으로 구성된다.The electron emitting material 104 includes a lower layer 104b formed of an alkaline earth metal composite oxide containing at least barium oxide BaO and coated on the upper surface of the base metal 103, And an upper layer 104a coated with an alkaline earth metal complex oxide containing at least barium oxide and containing an activating metal and a decomposition metal oxide.

상기 산화바륨이 포함된 알칼리토류금속복합산화물은 산화바륨, 산화스트론늄(SrO), 산화칼슘(CaO)등이며, 상기 전자방사물질상층(104a)의 활성화금속으로는 마그네슘, 실리콘, 크롬(Cr), 지르콘늄(Zr), 텅스텐(W), 레늄(Re)등의 금속이 적어도 한 종 이상 함유된 것이며, 상기 분해금속산화물은 산화스칸드늄(Sc2O3)등과 같은 희토류금속산화물이 적어도 한 종 이상 함유된 것이다.The barium oxide-containing alkaline earth metal composite oxide may be barium oxide, strontium oxide (SrO), calcium oxide (CaO) or the like, and the activating metal of the electron spinning material upper layer 104a may be magnesium, Cr), zirconium (Zr), tungsten (W), and rhenium (Re), and the decomposed metal oxide includes rare earth metal oxides such as scandium oxide (Sc 2 O 3 ) Or at least one species.

이와같이 구성된 본 발명의 작용을 설명하면 다음과 같다.Hereinafter, the operation of the present invention will be described.

먼저, 음극선관용 음극구조체의 슬리이브(102)내에 형성된 히터(101)에 전력이 가해지면 히터(101)가 발열하고, 상기 발열된 히터(101)의 열은 기체금속(103)을 가열하게 되고, 상기 기체금속(103)의 열로 인해 기체금속(103)과 전자방사물질(104)의 하층(104b)이 화학반응을 하게 되고, 상기 전자방사물질(104)의 하층(104b) 상단면에 도포된 전자방사물질(104)의 상층(104a)내에서도 화학반응이 일어나며, 상기 화학반응을 통해 전자가 생성된다.First, when electric power is applied to the heater 101 formed in the sleeve 102 of the cathode structure for a cathode ray tube, the heater 101 generates heat and the heat of the heater 101 heats the substrate metal 103 The base metal 103 and the lower layer 104b of the electron emitting material 104 are chemically reacted by the heat of the base metal 103 and the upper surface of the lower layer 104b of the electron emitting material 104 is coated A chemical reaction takes place in the upper layer 104a of the electron emitting material 104, and electrons are generated through the chemical reaction.

상기 전자방사물질(104)의 하층(104b)과 기체금속(103)사이에는 다음과 같은 화학반응이 일어난다.The following chemical reaction takes place between the lower layer 104b of the electron-emitting material 104 and the base metal 103.

4BaO + Si(기체금속중) = 2Ba + Ba2SiO4(반응물질)4 BaO + Si (in the base metal) = 2 Ba + Ba 2 SiO 4 (reactant)

BaO + Mg(기체금속중) = Ba + MgO(반응물질)BaO + Mg (in the gaseous metal) = Ba + MgO (reactant)

Ba = Ba2++ 2e-(전자생성)Ba = Ba 2+ + 2e - (electron generation)

또한, 전자방사물질(104)의 상층(104a)내에서는 알칼리토류금속복합산화물과 활성화금속과 분해금속산화물사이에 다음과 같은 화학반응이 일어나게 된다.Further, in the upper layer 104a of the electron emitting material 104, the following chemical reaction occurs between the alkaline earth metal complex oxide and the activated metal and the decomposed metal oxide.

4BaO + Si(활성화금속) = 2Ba + Ba2SiO4(반응물질)4 BaO + Si (activation metal) = 2 Ba + Ba 2 SiO 4 (reactant)

BaO + Mg(활성화금속) = Ba + MgO(반응물질)BaO + Mg (active metal) = Ba + MgO (reactant)

Ba = Ba2++ 2e-(전자생성)Ba = Ba 2+ + 2e - (electron generation)

Sc2O3(분해금속산화물) + 3Mg = 2Sc + 3MgOSc 2 O 3 (decomposition metal oxide) + 3 Mg = 2 Sc + 3 MgO

3Ba2SiO4(반응물질) + 8Sc = 6Ba + 3Si + 4Sc2O3(반응물질분해)3Ba 2 SiO 4 (reactant) + 8Sc = 6Ba + 3Si + 4Sc 2 O 3 (decomposition of reactants)

Ba = Ba2++ 2e-(전자생성)Ba = Ba 2+ + 2e - (electron generation)

여기서, 상기 전자방사물질(104)의 하층(104b)과 기체금속(103)의 화학반응을 통해 발생되는 반응물질이 분해금속산화물에 의해 분해되지 않으므로 전자방사물질(104)과 기체금속(103)간의 결합력이 강하게 되어 전자방사물질(104)이 기체금속(103)으로부터 탈락하는 것을 방지하게 되고, 상기 전자방사물질(104)의 상층(104a)내에서의 화학반응을 통해 발생되는 반응물질은 분해금속산화물에 의해 분해되므로 고음극전류밀도가 가능하게 되는 것이다.Since the reaction material generated through the chemical reaction between the lower layer 104b of the electron emitting material 104 and the gaseous metal 103 is not decomposed by the decomposed metal oxide, the electron emitting material 104 and the gaseous metal 103, And the reaction material generated through the chemical reaction in the upper layer 104a of the electron emitting material 104 is decomposed to decompose It is decomposed by the metal oxide, so that a high cathode current density becomes possible.

이상에서 설명한 바와 같이 본 발명은 전자방사물질을 상층과 하층으로 구성함으로써 전자방사물질의 하층과 기체금속간의 화학반응을 통하여 전자방사물질이 기체금속으로부터 탈락되는 것을 방지하고, 전자방사물질의 상층내에서의 화학반응을 통하여 고음극전류밀도를 가능하게 하는 효과가 있다.As described above, according to the present invention, the electron emission material is composed of the upper layer and the lower layer, thereby preventing the electron emission material from falling off from the gaseous metal through the chemical reaction between the lower layer of the electron emission material and the gaseous metal, The high current density can be achieved through the chemical reaction at the cathode.

Claims (4)

(정정)음극 가열용 히터가 삽입설치된 원통형의 슬리이브와, 상기 슬리이브 상부에 형성된 기체금속과, 상기 기체금속의 상단면에 도포된 전자방사물질로 구성된 음극선관용 음극구조체에 있어서, 상기 전자방사물질은 상기 기체금속의 상단면에 도포되며 전자방사물질이 기체금속으로부터 탈락되는 것을 방지하는 산화바륨(BaO)이 포함된 알칼리토류금속복합산화물로 구비된 하층과, 상기 하층의 상단면에 도포되며 고음극전류밀도가 가능하도록 산화바륨이 포함된 알칼리토류금속복합산화물과 활성화금속 및 분해금속산화물로 구비된 상층으로 구비된 것을 특징으로 하는 음극선관용 음극의 전자방사물질 조성물.A cathode structure for a cathode ray tube comprising a cylindrical sleeve having a cathode heating heater inserted therein, a base metal formed on the upper portion of the sleeve, and an electron emitting material coated on the upper surface of the base metal, The material is applied to the top surface of the underlying metal and is applied to the top surface of the bottom layer with an alkaline earth metal composite oxide containing barium oxide (BaO) to prevent electron emissive material from falling off the gaseous metal And an upper layer comprising an alkaline earth metal complex oxide containing barium oxide and an activating metal and a decomposing metal oxide so that a high cathode current density is possible. (정정제1항에 있어서, 상기 알칼리토류금속복합산화물은 산화바륨이나, 산화스트론늄(SrO), 또는 산화칼슘(CaO)으로 된 것을 특징으로 하는 음극선관용 음극의 전자방사물질 조성물.Wherein the alkaline earth metal composite oxide is made of barium oxide, strontium oxide (SrO), or calcium oxide (CaO). 제 1항에 있어서, 상기 활성화금속은 마그네슘(Mg), 실리콘(Si), 크롬(Cr), 지르콘늄(Zr), 텅스텐(W), 레늄(Re)중 적어도 어느 한 종 이상 함유된 것을 특징으로 하는 음극선관용 음극의 전자방사물질 조성물.The method according to claim 1, characterized in that the activating metal contains at least one of magnesium (Mg), silicon (Si), chromium (Cr), zirconium (Zr), tungsten (W) Wherein the electron emitting material composition of the negative electrode for a cathode ray tube is made by a method comprising: 제 1항에 있어서, 상기 분해금속산화물은 산화스칸드늄(Sc2O3)과 같은 희토류금속산화물이 적어도 어느 한 종 이상 함유된 것을 특징으로 하는 음극선관용 음극의 전자방사물질 조성물.The electron emitting material composition for a cathode ray tube negative electrode according to claim 1, wherein the decomposed metal oxide comprises at least one rare earth metal oxide such as scandium oxide (Sc 2 O 3 ).
KR1019960048310A 1996-10-25 1996-10-25 Electron emission material compounds of electrode for crt KR100259420B1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR890013695A (en) * 1988-02-23 1989-09-25 시끼 모리야 Cathode for electron tube
JPH02201841A (en) * 1989-01-31 1990-08-10 Sony Corp Oxide coated hot-cathode

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR890013695A (en) * 1988-02-23 1989-09-25 시끼 모리야 Cathode for electron tube
JPH02201841A (en) * 1989-01-31 1990-08-10 Sony Corp Oxide coated hot-cathode

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