JPH02160333A - Heater for electron tube - Google Patents
Heater for electron tubeInfo
- Publication number
- JPH02160333A JPH02160333A JP63314227A JP31422788A JPH02160333A JP H02160333 A JPH02160333 A JP H02160333A JP 63314227 A JP63314227 A JP 63314227A JP 31422788 A JP31422788 A JP 31422788A JP H02160333 A JPH02160333 A JP H02160333A
- Authority
- JP
- Japan
- Prior art keywords
- insulating material
- resistant insulating
- material layer
- heater
- heat
- 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.)
- Pending
Links
- 239000011810 insulating material Substances 0.000 claims abstract description 52
- 230000005855 radiation Effects 0.000 claims abstract description 15
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims abstract description 14
- 238000002844 melting Methods 0.000 claims abstract description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 4
- 239000003779 heat-resistant material Substances 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract description 2
- 229910017083 AlN Inorganic materials 0.000 abstract 2
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 12
- 239000000463 material Substances 0.000 description 12
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 7
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
- 235000019441 ethanol Nutrition 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000000725 suspension Substances 0.000 description 5
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000001962 electrophoresis Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000000020 Nitrocellulose Substances 0.000 description 1
- 229910000691 Re alloy Inorganic materials 0.000 description 1
- 229910001080 W alloy Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Solid Thermionic Cathode (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野］
本発明は陰極線管などのカソードを加熱するために用い
られる電子管用ヒータに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heater for an electron tube used to heat a cathode of a cathode ray tube or the like.
［従来の技術］
陰極線管などのカソード加熱用に、最近は第２図に示す
ようなダークヒータ（５１が好んで用いられている。こ
のダークヒータ（５）は、たとえば３％Ｒｅ−のような
タングステンとレニウムとの合金からなる芯線（ａの表
面に、酸化アルミニウム（アルミナ）の耐熱性絶縁物質
層（３）が被覆形成され、さらにこの表面上に熱輻射性
の高い、たとえばタングステン粉末とアルミナ粉末との
混合物からなるダーク物質層（６）が被覆形成されてい
る。このようなダークヒータ（５）は熱輻射効率がよい
ため、ダーク物質層（６）の形成されていないヒータに
比べて同じカソード温度をうるための芯線（２の濃度を
約２００℃程度下げることが可能である。したがって信
頼性が高く、近年好んで多用されている。[Prior Art] Recently, a dark heater (51) as shown in Fig. 2 has been preferably used to heat the cathode of a cathode ray tube or the like. A heat-resistant insulating material layer (3) of aluminum oxide (alumina) is coated on the surface of the core wire (a) made of an alloy of tungsten and rhenium. A dark material layer (6) made of a mixture with alumina powder is formed as a covering.Such a dark heater (5) has a high heat radiation efficiency, so it is less expensive than a heater without a dark material layer (6). It is possible to lower the concentration of the core wire (2) by about 200°C to obtain the same cathode temperature. Therefore, it is highly reliable and has been frequently used in recent years.
つぎにこの従来のダークヒータ（５）の製法について述
べる。Next, the manufacturing method of this conventional dark heater (5) will be described.
まず３％Ｒｅ−からなる芯線（２）を第２図に示すよう
なスパイラル状のコイル部と直線状の脚部に成形する。First, a core wire (2) made of 3% Re- is formed into a spiral coil part and a straight leg part as shown in FIG.
つぎにこの芯線（２の直線状脚部の一部を除く部分にア
ルミナからなる耐熱性絶縁物質層（３）を被覆形成する
。この被覆形成は、アルミナをアルコールなどの有機液
体に懸濁したのち、電気泳動などの方法を用いることに
より行なわれる。っいで耐熱性絶縁物質層（３）の最表
面の付着強度の弱い耐熱性絶縁物質層をアセトンなどの
有機液体でリンスして除去する。つぎに、これらの工程
で使用したアルコールやアセトンなどの有機液体を乾燥
により完全に除去する。ついで、これをタングステン粉
末とアルミナ粉末との混合物質からなるダーク物質を、
酢酸ブチルやニトロセルロースなどの有機液体と混合し
たダーク液の中に浸漬してダーク物質層（６）を被覆形
成する。つぎにダーク物質層（６）の最表面の付着強度
の弱いダーク物質層をアルコールなどの有機液体でリン
スする。、Ｊｉ後に、耐熱性絶縁物質層（３）およびダ
ーク物質層（６）の付着強度を増大させるために、たと
えば水素などの非酸化性雰囲気中で約１６５０℃に加熱
して焼結することにより、ダークヒータ（５）が製造さ
れる。Next, a heat-resistant insulating material layer (3) made of alumina is coated on the core wire (2) except for a part of the straight leg part.This coating is formed by suspending alumina in an organic liquid such as alcohol. This is then carried out using a method such as electrophoresis.Then, the heat-resistant insulating material layer on the outermost surface of the heat-resistant insulating material layer (3), which has weak adhesion strength, is removed by rinsing with an organic liquid such as acetone. Next, the organic liquids such as alcohol and acetone used in these steps are completely removed by drying.Then, this is mixed with a dark substance consisting of a mixture of tungsten powder and alumina powder.
A dark substance layer (6) is formed by immersing it in a dark liquid mixed with an organic liquid such as butyl acetate or nitrocellulose. Next, the outermost dark material layer (6) with weak adhesion strength is rinsed with an organic liquid such as alcohol. , by heating and sintering at about 1650° C. in a non-oxidizing atmosphere such as hydrogen, to increase the adhesion strength of the heat-resistant insulating material layer (3) and the dark material layer (6) after Ji. , a dark heater (5) is manufactured.
これらの工程中で最も重要なポイントは、浸漬によるダ
ーク物質層（６）の形成の際、多孔質状である耐熱性絶
縁物質層（３）の中ヘダーク物質が浸透するのを防ぐこ
とである。導電性を有するダーク物質の浸透が生じると
、芯線（２１とダーク物質層（６）との間でリーク電流
が生じ、ヒータとカソード間の電気絶縁性が損なわれて
しまう。その結果、カソードに加えられる映像信号がヒ
ータを通じて他の回路に流出してしまうため映像品位が
極めて劣化してしまう。この浸透を防ぐためには、第１
層である耐熱性絶縁物質層（３）の被覆形成、リンス工
程のあと、用いた有機液体を乾燥により完全に除去する
ことが必須である。この方法として特公昭５３−３１５
９２号公報に示されるように、芯線（ａが酸化されない
程度の温度で空気中で加熱することにより耐熱性絶縁物
質層（３）に含まれた有機液体を完全に除去することが
有効とされている。しかし、一方で、耐熱性絶縁物質Ｍ
ｌ（３）の被覆形成の際のＮ前液の組成変化、または芯
線（２の部分的な汚れなどにより耐熱性絶縁物質層（３
）の一部に微少なピンホールが形成されるばあいがあり
、このような状態の下にダーク物質層（６）を形成する
と、導電性を有するダーク物質が耐熱性絶縁物質層（３
）のピンホールの中に浸透して耐熱性絶縁物質層の絶縁
破壊がおこるという問題がある。The most important point in these steps is to prevent the dark material from penetrating into the porous heat-resistant insulating material layer (3) during the formation of the dark material layer (6) by dipping. . When the conductive dark substance penetrates, a leakage current occurs between the core wire (21) and the dark substance layer (6), and the electrical insulation between the heater and the cathode is impaired.As a result, the cathode The applied video signal leaks to other circuits through the heater, resulting in extremely poor video quality.To prevent this penetration, the first step is to
After forming the heat-resistant insulating material layer (3) and rinsing, it is essential to completely remove the organic liquid used by drying. As for this method,
As shown in Publication No. 92, it is effective to completely remove the organic liquid contained in the heat-resistant insulating material layer (3) by heating it in air at a temperature that does not oxidize the core wire (a). However, on the other hand, the heat-resistant insulating material M
The heat-resistant insulating material layer (3) may be damaged due to a change in the composition of the N preliquid during the formation of the coating of (3), or due to partial contamination of the core wire (2).
), and if the dark material layer (6) is formed under such conditions, the conductive dark material may form in the heat-resistant insulating material layer (3).
) Penetration into the pinholes causes dielectric breakdown of the heat-resistant insulating material layer.
［発明が解決しようとする課題］
従来の電子管用ヒータは以上のように構成されているた
め、耐熱性絶縁物質層の被覆形成の際の品質バラツキに
よって耐熱性絶縁物質層の絶縁が破壊されるという問題
があった。本発明は、上記のような問題点を解消するた
めになされたものであり、性能を損うことなく信頼性の
高い電子管用ヒータをうることを目的とする。[Problems to be Solved by the Invention] Since the conventional electron tube heater is configured as described above, the insulation of the heat-resistant insulating material layer is destroyed due to quality variations in forming the coating of the heat-resistant insulating material layer. There was a problem. The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a highly reliable heater for an electron tube without impairing performance.
［課題を解決するための手段］
本発明は、高融点金属材料からなる芯線、この芯線の周
囲に被覆形成された耐熱性絶縁物質層およびこの耐熱性
絶縁物質層の表面に被覆形成された高輻射耐熱性絶縁物
質層からなる電子管用ヒータであって、前記高輻射耐熱
性絶縁物質としてチッ化アルミニウムを用いたことを特
徴とする電子管用ヒータに関する。[Means for Solving the Problems] The present invention provides a core wire made of a high-melting point metal material, a heat-resistant insulating material layer coated around the core wire, and a high-temperature insulating material layer coated on the surface of the heat-resistant insulating material layer. The present invention relates to an electron tube heater comprising a radiation heat resistant insulating material layer, the heater comprising aluminum nitride as the radiation heat resistant insulating material.
［作 用］
本発明におけるダーク物質材料であるチッ化アルミニウ
ムは、熱輻射率が轟く、また絶縁抵抗が＾いため、前記
問題点をすべて解消できる。[Function] Aluminum nitride, which is the dark substance material in the present invention, has a high thermal emissivity and a high insulation resistance, so all of the above problems can be solved.
［実施例］
本発明の電子管用ヒータは、その形式にとくに限定はな
く、たとえばシングルヘリカル形であってもよく、ダブ
ルへリカル形であってもよく、これら以外の形式であっ
てもよい。[Example] The type of the electron tube heater of the present invention is not particularly limited, and may be, for example, a single helical type, a double helical type, or other types.
本発明に用いられる芯線にとくに限定はなく、その具体
例としては、たとえば従来から電子管用ヒータに用いら
れている３％Ｒｅ−Ｗ、純１ｔ４ 、Ｈａなどの融点が
２５００℃程度以上の高融点金属材料からなる芯線があ
げられ、その太さ、形状などにもとくに限定はない。The core wire used in the present invention is not particularly limited, and specific examples include 3% Re-W, pure 1t4, and Ha, which have been conventionally used in electron tube heaters, and have high melting points of about 2500°C or higher. A core wire made of a metal material is mentioned, and there are no particular limitations on its thickness, shape, etc.
前記芯線の周囲に被覆形成される耐熱性絶縁物質層にと
くに限定はなく、その具体例としては、たとえば従来か
ら電子管用ヒータに形成されているアルミナなどからな
る厚さ６０〜８０虜の層があげられる。There is no particular limitation on the heat-resistant insulating material layer formed around the core wire, and a specific example thereof is a layer with a thickness of 60 to 80 mm made of alumina, which has been conventionally formed in heaters for electron tubes. can give.
前記耐熱性絶縁物質層の表面に被覆形成された高輻射耐
熱性絶縁物質層はチッ化アルミニウムの層であり、その
厚さは１〜３虜であるのが好ましい。チッ化アルミニウ
ムは１０１３Ω・１の絶縁抵抗を有し、かつ茶褐色の色
を呈しているため熱輻射率が高い。したがって、たとえ
耐熱性絶縁物質層の一部にピンホールが存在し、その中
に高輻射耐熱性絶縁物質層であるチツ化アルミニウムが
浸透しても、電気絶縁性が損なわれることがない。The high-radiation heat-resistant insulating material layer coated on the surface of the heat-resistant insulating material layer is an aluminum nitride layer, and preferably has a thickness of 1 to 3 mm. Aluminum nitride has an insulation resistance of 1013 Ω·1 and is brown in color, so it has a high thermal emissivity. Therefore, even if a pinhole exists in a part of the heat-resistant insulating material layer and aluminum nitride, which is a high-radiation heat-resistant insulating material layer, penetrates into the pinhole, the electrical insulation will not be impaired.
つぎに本発明の電子管用ヒータの製法を説明する。Next, a method for manufacturing the electron tube heater of the present invention will be explained.
まず芯線を任意の形状に成形したのち、その周囲に耐熱
性絶縁物質層を形成する。該層は、たとえばアルミナを
アルコールなどの有機液体に懸濁させた懸濁液を用いる
電気泳動法などにより形成しうる。First, a core wire is formed into an arbitrary shape, and then a layer of heat-resistant insulating material is formed around it. The layer can be formed, for example, by electrophoresis using a suspension of alumina in an organic liquid such as alcohol.
ついでアセトンなどの有機液体でリンスしたのち、２０
０℃の温風で乾燥させて有機液体を完全に除去する。After rinsing with an organic liquid such as acetone,
Dry with warm air at 0°C to completely remove organic liquid.
一方、粒径が数摩のチッ化アルミニウムを、硝化綿を溶
解した濃度２０〜４０重量％の酢酸ブチル溶液に、濃度
が３０〜５０重量％になるように加え、充分に（２４〜
４８時間程度）混合攪拌する。えられた懸濁液中に、前
記耐熱性絶縁物質層が被覆形成されたヒータを浸すこと
により、表面張力により高輻射耐熱性絶縁物質層が被覆
形成される。On the other hand, aluminum nitride with a particle size of several microns was added to a butyl acetate solution containing nitrified cotton at a concentration of 20 to 40% by weight to a concentration of 30 to 50% by weight.
(about 48 hours) Mix and stir. By immersing the heater coated with the heat-resistant insulating material layer into the obtained suspension, a high-radiation heat-resistant insulating material layer is formed by surface tension.
ついで高輻射耐熱性絶縁物質層の最表面の付着強度の弱
い高輻射耐熱性絶縁物質層をイソプロピルアルコールな
どでリンスして除去する。Next, the high radiation heat resistant insulating material layer on the outermost surface of the high radiation heat resistant insulating material layer, which has weak adhesion strength, is removed by rinsing with isopropyl alcohol or the like.
最後に耐熱性絶縁物質層および高輻射耐熱性絶縁物質層
の機械的強度を増すために水素雰囲気中、１６００〜１
１００℃で５〜１０分間焼結させることにより、本発明
の電子管用ヒータが製造される。Finally, in order to increase the mechanical strength of the heat-resistant insulating material layer and the high radiation heat-resistant insulating material layer, the
The electron tube heater of the present invention is manufactured by sintering at 100° C. for 5 to 10 minutes.
つぎに本発明を実施例に基づき、さらに具体的に説明す
るが、本発明はこれらの実施例のみに限定されるもので
はない。EXAMPLES Next, the present invention will be explained in more detail based on Examples, but the present invention is not limited to these Examples.
実施例１および比較例１
３％Ｒｅ−からなる直径７９−の芯線（ａを、第１図に
示すようなスパイラル状のコイル部（１，５ａｍφ）と
直線状の脚部に成形した。つぎにアルミナ粉末１６００
ｇと、エチルアルコール１３００ｃｃ、水８５０ｃｃ
。Example 1 and Comparative Example 1 A core wire (a) made of 3% Re and having a diameter of 79 mm was formed into a spiral coil part (1.5 amφ) and a straight leg part as shown in FIG. alumina powder 1600
g, ethyl alcohol 1300cc, water 850cc
.
硝酸アルミニニウム４０Ｑおよび硝酸マグネシウム４０
Ｑとからなる懸濁液を調合した。この懸濁液に芯線の脚
部の一部を除く部分を浸し、電気泳動法によって芯線の
表面にアルミナからなる耐熱性絶縁物質層（３）を形成
した。ついで、耐熱性絶縁物質層をアセトンでリンスし
た。つぎに、上記の工程で使用したアルコールやアセト
ンなどの有機液体を２００℃の熱風で乾燥して、完全に
除去した。耐熱性絶縁物質層の厚さは１０ρであった。Aluminum nitrate 40Q and magnesium nitrate 40
A suspension consisting of Q was prepared. The parts of the core wire except for some of the legs were immersed in this suspension, and a heat-resistant insulating material layer (3) made of alumina was formed on the surface of the core wire by electrophoresis. The layer of heat-resistant insulating material was then rinsed with acetone. Next, the organic liquid such as alcohol or acetone used in the above step was dried with hot air at 200° C. to completely remove it. The thickness of the heat-resistant insulating material layer was 10ρ.
一方、粒径約１虜のチッ化アルミニウムを、硝化綿を溶
解した濃度３０重量％の酢酸ブチル溶液に、濃度が４０
重量％になるように加え、２４時間混合攪拌した。On the other hand, aluminum nitride with a particle size of about 1 mm was added to a butyl acetate solution with a concentration of 30% by weight in which nitrified cotton was dissolved, and the concentration was 40% by weight.
The mixture was added in an amount of % by weight and mixed and stirred for 24 hours.
えられた懸濁液中に、前記耐熱性絶縁物質層が被覆形成
されたヒータを浸すことにより、表面張力により高輻射
耐熱性絶縁物質層（４）が被覆形成さた。ついでイソプ
ロピルアルコールでリンスした。By immersing the heater coated with the heat-resistant insulating material layer into the resulting suspension, a high-radiation heat-resistant insulating material layer (4) was formed by surface tension. It was then rinsed with isopropyl alcohol.
高輻射耐熱性絶縁物質層の厚さは約２虜であった。The thickness of the high radiation heat resistant insulating material layer was approximately 2 mm.
最後に、水素雰囲気中で１６５０℃で５分間加熱して焼
結した。Finally, it was sintered by heating at 1650° C. for 5 minutes in a hydrogen atmosphere.
えられた電子管用ヒータ（１）を用いた電子銃１５本を
組み立て、ヒータ電流を調べた。結果を第３図に示す。Fifteen electron guns were assembled using the obtained electron tube heater (1), and the heater current was examined. The results are shown in Figure 3.
図中×はチッ化アルミニウムを高輻射耐熱性絶縁物質層
とした本発明のヒータの結果を示し、Ｏは比較のために
試験した従来のダーク物質層を有する１５本のヒータ（
比較例１）の結果である。第３図かられかるように実施
例のヒータと比較例のヒータとはヒータ電流に差はなか
った。すなわちチッ化アルミニウムは、従来のダーク物
質層とほぼ同等の熱輻射率を有していることがわかる。In the figure, × indicates the results of the heater of the present invention using aluminum nitride as a high radiation heat-resistant insulating material layer, and O indicates the results of 15 heaters with a conventional dark material layer tested for comparison (
These are the results of Comparative Example 1). As can be seen from FIG. 3, there was no difference in heater current between the heater of the example and the heater of the comparative example. That is, it can be seen that aluminum nitride has almost the same thermal emissivity as the conventional dark material layer.
参考例１
アルミナからなる耐熱性絶縁物質層を被覆形成する際、
汚染された芯線を用いピンホールを故意に形成させたほ
かは、実施例１と同様にしてヒータを作製した。Reference Example 1 When forming a heat-resistant insulating material layer made of alumina,
A heater was produced in the same manner as in Example 1, except that a contaminated core wire was used and a pinhole was intentionally formed.
えられたヒータ１５本を用いてヒータとカリード間のリ
ーク電流をＥ、 −７，ＯＶ、 ＥＨ−に−２００Ｖ
（７）条件で測定した。結果を第４図に示す。Using the 15 heaters obtained, reduce the leakage current between the heater and Kalid to -200V at E, -7,OV, and EH-.
Measured under the conditions (7). The results are shown in Figure 4.
参考例２
参考例１と同様のピンホールを有する耐熱性絶縁物質層
が被覆形成され、従来のダーク物質層が被覆形成された
ヒータ１５本を用い、参考例１と同様にしてヒータとカ
リード間のリーク電流を測定した。結果を第４図に示す
。Reference Example 2 Using 15 heaters coated with a heat-resistant insulating material layer having pinholes similar to those in Reference Example 1, and coated with a conventional dark material layer, the connection between the heater and the calid was carried out in the same manner as in Reference Example 1. The leakage current was measured. The results are shown in Figure 4.
参考例１および２の結果から明らかなように、本発明の
ヒータに被覆形成されるチッ化アルミニウムからなる高
輻射耐熱性絶縁物質層は、−リーク電流をほとんど生じ
させないことがわかる。As is clear from the results of Reference Examples 1 and 2, the high radiation heat-resistant insulating material layer made of aluminum nitride and formed to cover the heater of the present invention generates almost no leakage current.
［発明の効果］
以上のように、本発明の電子管用ヒータは、高輻射耐熱
性材料として絶縁性を有するチッ化アルミニウムを使用
したため、耐熱性絶縁物質層の一部にピンホールなどの
欠陥があったとしても、リーク電流を生じさせない信頼
性が飛躍的に向上した電子管用ヒータである。[Effects of the Invention] As described above, since the electron tube heater of the present invention uses insulating aluminum nitride as a high radiation heat-resistant material, there are no defects such as pinholes in a part of the heat-resistant insulating material layer. Even if there is, this is an electron tube heater that has dramatically improved reliability and does not generate leakage current.
第１図は本発明のヒータを示す説明図、第２図は従来の
ヒータを示す説明図、第３図は実施例１および比較例１
において測定したヒータ電流を示すグラフ、第４図は参
考例１および２において測定したヒータとカソード間の
リーク電流を示すグラフである。
（図面の主要符号）
（１）：ヒータ
（２１：芯 線
（３）：耐熱性絶縁物質層
（４）：高輻射耐熱性絶縁物質層
代 理 人 大 岩 増 雄′Ａ７１
回
才２回Fig. 1 is an explanatory diagram showing a heater of the present invention, Fig. 2 is an explanatory diagram showing a conventional heater, and Fig. 3 is an explanatory diagram showing a conventional heater.
FIG. 4 is a graph showing the leakage current between the heater and the cathode measured in Reference Examples 1 and 2. (Main symbols in the drawing) (1): Heater (21: Core wire (3): Heat-resistant insulating material layer (4): High radiation heat-resistant insulating material layer Agent Masuo Oiwa 'A71
2 times
Claims (1)
被覆形成された耐熱性絶縁物質層およびこの耐熱性絶縁
物質層の表面に被覆形成された高輻射耐熱性絶縁物質層
からなる電子管用ヒータであって、前記高輻射耐熱性絶
縁物質としてチッ化アルミニウムを用いたことを特徴と
する電子管用ヒータ。(1) For electron tubes consisting of a core wire made of a high-melting point metal material, a heat-resistant insulating material layer coated around the core wire, and a high-radiation heat-resistant insulating material layer coated on the surface of the heat-resistant insulating material layer. 1. A heater for an electron tube, characterized in that aluminum nitride is used as the high radiation heat-resistant insulating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63314227A JPH02160333A (en) | 1988-12-12 | 1988-12-12 | Heater for electron tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63314227A JPH02160333A (en) | 1988-12-12 | 1988-12-12 | Heater for electron tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02160333A true JPH02160333A (en) | 1990-06-20 |
Family
ID=18050814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63314227A Pending JPH02160333A (en) | 1988-12-12 | 1988-12-12 | Heater for electron tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02160333A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05275434A (en) * | 1992-03-24 | 1993-10-22 | Ngk Insulators Ltd | Ceramic heater for heating semiconductor and its manufacture |
-
1988
- 1988-12-12 JP JP63314227A patent/JPH02160333A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05275434A (en) * | 1992-03-24 | 1993-10-22 | Ngk Insulators Ltd | Ceramic heater for heating semiconductor and its manufacture |
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