KR950013862B1 - Cathod manufacture method - Google Patents

Cathod manufacture method Download PDF

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KR950013862B1
KR950013862B1 KR1019880006339A KR880006339A KR950013862B1 KR 950013862 B1 KR950013862 B1 KR 950013862B1 KR 1019880006339 A KR1019880006339 A KR 1019880006339A KR 880006339 A KR880006339 A KR 880006339A KR 950013862 B1 KR950013862 B1 KR 950013862B1
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cathode
sleeve
negative electrode
chromium
layer
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KR1019880006339A
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Korean (ko)
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KR890017751A (en
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조석래
손석봉
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삼성전관주식회사
김정배
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/04—Cathodes

Abstract

The method for manufacturing a cathode structure composed of a cathode sleeve, a cathode substrate, an electron emission material, a heater and a supporter comprises the steps of: forming the cathode sleeve with double structure of inner layer made of alloy including chrome and an outer layer made of single metal element; thermal-processing the cathode sleeve under the hydrogen surrounding containing H2O to blacken the inner side; and welding the cathode substrate and the supporter to the blackened cathode sleeve.

Description

방열형 음극과 그 제조방법Heat dissipation cathode and its manufacturing method

제 1 도는 종래 방열형 음극 구조체의 종단면도이고,1 is a longitudinal sectional view of a conventional heat dissipating cathode structure,

제 2 도 a는 본 발명에 따른 음극 슬러브의 입체도이며,2 is a three-dimensional view of the negative electrode slab according to the present invention,

b는 본 발명에 따른 음극 슬러브의 종단면도이고,b is a longitudinal sectional view of the negative electrode slab according to the present invention,

c는 "가"부분의 확대도이며,c is an enlargement of the "a" part,

제 3 도 a는 본 발명에 따른 음극 구조체의 전자 방출 특성도이고,3 is an electron emission characteristic diagram of a negative electrode structure according to the present invention,

b는 본 발명에 따른 음극 구조체의 수명 특성도이다.b is a life characteristic diagram of the negative electrode structure according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 음극 슬리브 2 : 음극기판1: negative electrode sleeve 2: negative electrode substrate

3 : 전자 방사물질 4 : 히터3: electron radiating material 4: heater

5 : 지지체 6 : 내측층5 support 6 inner layer

7 : 외측층 8 : 산화피막층7 outer layer 8 oxide film layer

본 발명은 전자관, 특히 전자 방출 속도의 단축과 수명개선을 위한 고효율 음극선관에 적합한 방열형 음극과 그 제조방법에 관한 것이다.The present invention relates to a heat dissipating cathode suitable for an electron tube, in particular, a high efficiency cathode ray tube for shortening the electron emission rate and improving the lifetime, and a method of manufacturing the same.

일반적으로 음극 니켈-크롬의 합금으로 제조되고, 제 1 도에 도시되어 있는 바와 같이, 전기한 음극 슬리브(1)에 음극기판(2)과 지지체(5)를 용접한 다음 약 950℃의 H2O를 포함한 수소(H2) 분위기에서 열처리를 하여 음극 구조체를 제조한다.It is generally made of an alloy of cathode nickel-chromium, and as shown in FIG. 1, the anode substrate 2 and the support 5 are welded to the cathode sleeve 1, and then H 2 O of about 950 ° C. Heat treatment is performed in a hydrogen (H 2) atmosphere to prepare a negative electrode structure.

상기 제조과정에서 슬리브(1)의 크롬이 H2O와 반응하여 흑화처리가 되기 때문에 슬리브의 내.외면에 산화 피막이 형성되는 바, 이 음극구조체에 다시 전자 방사물질(3)을 도포하여 진공중에서 산화물 상태가 되면 히타(4)에 의해 음극이 가열될 때 전자가 방출되어서 스크린의 형광체를 발광시킨다.In the manufacturing process, since the chromium of the sleeve 1 reacts with H 2 O to blacken, an oxide film is formed on the inner and outer surfaces of the sleeve, and the electron emitting material 3 is applied to the cathode structure again to form an oxide in vacuum. When the cathode is heated by the heater 4, electrons are emitted to emit the phosphor of the screen.

이와 같이 제조된 음극 구조체는 전자 방출속도를 단축시키는 효과를 기대할 수 있으나 크롬성분의 산화된 불순물이 음극기판(2)에 영향을 미쳐 브라운관의 수명을 단축시키는 결점이 있다.The negative electrode structure manufactured as described above can be expected to shorten the electron emission rate, but chromium oxidized impurities affect the negative electrode substrate 2, thereby shortening the life of the CRT.

그리고, 상기 슬리브(1)를 별도로 산회 처리하면 음극기판(2) 및 지지체(5)의 용접시에는 산화 피막으로 용접이 불가능하고, H2O를 포함하지 않은 수소(H2) 분위기에서 음극부품을 모두 조립하여 열처리하면 산화피막은 형성되지 않아 수명에는 영향을 미치지 않지만 전자 방출 속도가 대단히 느리게 되는 결점이 발생된다.In addition, if the sleeve 1 is separately acid-treated, the welding of the anode substrate 2 and the support 5 may not be possible by welding with an oxide film, and the cathode parts may be assembled in a hydrogen (H 2) atmosphere containing no H 2 O. When the heat treatment is performed, an oxide film is not formed, which does not affect the life, but causes a defect that the electron emission rate is very slow.

따라서, 본 발명은 니켈-크롬의 합금 또는 크롬의 내측층과, 니켈 금속 성분의 외측층으로 형성된 이중층의 슬리브를 구성하고, 이 슬리브는 H2O가 포함된 수소분위기의 로(furnace) 내에서 서서히 가열하여 슬리브 내측면의 크롬성분이 흑화되게 하여 형성된 음극 구조체와 이의 제조방법을 제공하는데 그 목적이 있다.Accordingly, the present invention constitutes a double layer sleeve formed of an alloy layer of nickel-chromium or chromium and an outer layer of nickel metal component, which sleeve is gradually heated in a furnace of a hydrogen atmosphere containing H2O. It is an object of the present invention to provide a negative electrode structure and a method for manufacturing the same, which are formed by blackening the chromium component on the inner surface of the sleeve.

다음은 제 2 도 내지 제 3 도를 참조하여 본 발명에 따른 실시예를 상세히 설명한다.Next, embodiments according to the present invention will be described in detail with reference to FIGS. 2 to 3.

제 2 도 a와 b는 본 발명에 따른 음극 슬리브의 입체도와 종단면도를 도시하였고, 제 2 도 c는 "가" 부분을 확대한 도면이며, 참조번호 6은 슬리브의 내측층이고, 참조번호 7은 슬리브의 외측층이며, 참조번호 8은 산화 피막층이다.Figures 2a and b show a three-dimensional and longitudinal cross-sectional view of the cathode sleeve according to the invention, Figure 2c is an enlarged view of the "a" part, reference 6 is the inner layer of the sleeve, reference 7 Is an outer layer of the sleeve, and reference numeral 8 is an oxide film layer.

제 3 도 a와 b는 본 발명에 따른 음극 구조체의 전자 방출 특성도와 수명 특성도를 나타낸다.3A and 3B show electron emission characteristics and lifetime characteristics of the negative electrode structure according to the present invention.

본 발명에 따른 방열형 음극을 제조방법은 이중층의 구조를 갖는 음극 슬리브(1)를 형성하는 공정과, 이중구조의 금속슬리브를 H2O를 함유한 수소 분위기에서 열처리하여 내측면이 흑화되게 하는 공정과, 열처리된 음극 슬리브에 음극기판과 지지체를 용접하는 공정으로 음극 구조체를 제작한다.The method of manufacturing a heat dissipating negative electrode according to the present invention comprises the steps of forming a negative electrode sleeve (1) having a double layer structure, heat treating the double-sided metal sleeve in a hydrogen atmosphere containing H2O to blacken the inner surface, A negative electrode structure is manufactured by welding a negative electrode substrate and a support to a heat treated negative electrode sleeve.

상기의 음극 슬리브의 형성 공정에서, 슬리브의 내측층(6)을 니켈-크롬의 합금 또는 크롬의 금속성분으로 형성시키고, 슬리브 외부층(7)을 니켈만으로 형성시켜 2중구조를 갖는 원통형의 슬리브가 20-30τmm 두께로 제조된다.In the process of forming the negative electrode sleeve, the inner layer 6 of the sleeve is formed of an alloy of nickel-chromium or a metal component of chromium, and the sleeve outer layer 7 is formed of only nickel to form a cylindrical sleeve having a double structure. 20-30τmm thick.

상기 이중 구조의 슬리브는 H2O를 함유한 수소분위기에서 약 900℃ 온도로 열처리를 하게될 때, 음극 슬리브의 내측면에는 내측층의 크롬성분이 H2O와 반응하여 수 τmm 두께의 산화피막층(8)이 형성되어 흑화 처리된다.When the double-sleeve sleeve is subjected to heat treatment at a temperature of about 900 ° C. in a hydrogen atmosphere containing H 2 O, the chromium component of the inner layer reacts with H 2 O on the inner surface of the cathode sleeve so that an oxide film layer 8 having a thickness of several τ mm is formed. It is formed and blackened.

여기에서, 전자 방출 속도는

Figure kpo00001
로 정의되는데(t : 시간, C : 음극열용량, P : 히타의 공급전력), 전자 방출속도를 빠르게 하려면 C(음극열 용량)을 작게(히타의 공급전력은 고정되어 있기 때문임) 해야 한다.Here, the electron emission rate is
Figure kpo00001
It is defined as (t: time, C: cathode heat capacity, P: heater power supply), and to increase the electron emission rate, C (cathode heat capacity) must be made small (because the heater power supply is fixed).

즉, 음극 슬리브(1)를 작게하거나 열복사 효율을 높히는 흑화 처리를 하므로써 전자 방출 속도를 빠르게 할 수 있다.That is, the electron emission rate can be made faster by making the cathode sleeve 1 small or blackening which raises heat radiation efficiency.

음극 슬리브(1)의 외측층(7)에는 크롬 성분이 없기 때문에 흑화되지 않아 금속 광택이 유지될 수 있고, 아울러 음극기판(2)과의 용접이 용이하게 된다.Since the outer layer 7 of the negative electrode sleeve 1 does not have a chromium component, it may not be blackened so that metallic luster can be maintained, and welding with the negative electrode substrate 2 is facilitated.

상기 외측층의 금속광택에 의해 모든 열은 반사되어 음극기판(2)으로 공급되기 때문에 열효율이 우수한 특성을 갖는 음극 제조가 가능하고 또한 저 전력용의 음극 설계가 가능하다.Since all heat is reflected and supplied to the negative electrode substrate 2 by the metal gloss of the outer layer, it is possible to manufacture a negative electrode having excellent thermal efficiency and to design a negative electrode for low power.

한편, 음극기판(2) 상에는 전자 방사물질(3)인 탄산염을 도포하는데, 이는 배기과정에서 산화물 형태로 남게된다. 즉 (Ba, Ca, Sr) CO3(Ba, Ca, Sr)O+CO2가 되며, 전자방사물질(3)이 음극기판(2)의 마그네슘, 실리콘과 반응하여 유리된 전자를 방출한다.On the other hand, a carbonate, which is an electron emitting material 3, is applied onto the negative electrode substrate 2, which remains in the form of an oxide in the exhaust process. That is, (Ba, Ca, Sr) CO 3 (Ba, Ca, Sr) O + CO 2, and the electron emitting material 3 reacts with magnesium and silicon of the negative electrode substrate 2 to release free electrons.

상기 화학 방정식의 바륨(Ba)의 동작형태는 BaO+Mg MgO+Ba로서 산화물과 음극기판(2) 사이에 중간 저항층을 형성시켜 브라운관 수명을 단축시키는 요인으로 작용된다.The operation form of barium (Ba) in the above chemical equation is BaO + Mg MgO + Ba, which acts as a factor for shortening CRT life by forming an intermediate resistance layer between the oxide and the negative electrode substrate 2.

상기 중간 저항층이 생성되기 이전에 음극 슬리브(1)에서의 흑화과정중 불순물이 음극기판(2)에 도포되면 더욱 불안정하고, 아울러 중간 저항층을 더욱 두껍게 형성하여 결과적으로 더욱 수명이 단축시키게 된다.If impurities are applied to the negative electrode substrate 2 during the blackening process in the negative electrode sleeve 1 before the intermediate resistance layer is formed, it becomes more unstable, and as a result, a thicker intermediate resistance layer is formed, resulting in a shorter life. .

이러한 연유로 하여 본 발명에 따라 제조된 방열형 음극은, 제 3 도 a와 b에 도시되어 있는 바와 같이, 종래의 음극보다 전자 방출시간이 단축되고(제 3 도 a의 10), 종래의 음극보다 수명이 개선되어(제 3 도의 b의 12) 효율이 우수하고 저전력이 가능한 속통형 브라운관을 만들 수 있다.For this reason, the heat radiation type negative electrode manufactured according to the present invention has a shorter electron emission time than the conventional negative electrode, as shown in FIGS. 3A and 10B (10 in FIG. The service life is improved (12 in b of FIG. 3), which makes it possible to produce a fast tube type tube having excellent efficiency and low power.

Claims (2)

니켈-크롬의 합금 또는 크롬의 내측층(6)과, 니켈 금속 성분의 외측층(7)의 이중층으로 형성된 음극 슬리브(1)를 구비하고, 상기의 내측층(6)이 산화 처리하여 흑화된 표면을 갖도록 한 것을 특징으로 하는 방열형 음극.A cathode sleeve 1 formed of an inner layer 6 of an alloy of nickel-chromium or chromium and a double layer of an outer layer 7 of a nickel metal component is provided, and the inner layer 6 is oxidized and blackened. Heat dissipation cathode characterized in that it has a surface. 음극 슬리브, 음극기판, 전자방사물질, 히터 및 지지체로 구성되는 음극 구조체를 제조하는 방법에 있어서, 크롬을 포함한 합금의 내측층과 만일 금속성분으로 된 외측층의 이중 구조로 된 음극 슬리브(1)를 형성하는 공정과, 이중구조의 음극 슬리브를 H2O를 함유한 수소분위기에서 열처리하여 내측면이 흑화되게 하는 공정과, 흑화된 음극 슬리브에 음극기판과 지지체를 용접하는 공정으로 음극 구조체를 제조하는 것을 특징으로 하는 음극 제조방법.In the method for producing a negative electrode structure consisting of a negative electrode sleeve, a negative electrode substrate, an electrospinning material, a heater and a support, the negative electrode sleeve (1) having a double structure of an inner layer of an alloy containing chromium and an outer layer of a metal component, if any. Forming a cathode structure, heat treating a dual structure anode sleeve in a hydrogen atmosphere containing H2O to blacken the inner surface, and welding the anode substrate and the support to the blackened cathode sleeve. A cathode production method characterized in that.
KR1019880006339A 1988-05-28 1988-05-28 Cathod manufacture method KR950013862B1 (en)

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