JPH065124A - Inorganic insulated electric wire - Google Patents
Inorganic insulated electric wireInfo
- Publication number
- JPH065124A JPH065124A JP4162660A JP16266092A JPH065124A JP H065124 A JPH065124 A JP H065124A JP 4162660 A JP4162660 A JP 4162660A JP 16266092 A JP16266092 A JP 16266092A JP H065124 A JPH065124 A JP H065124A
- Authority
- JP
- Japan
- Prior art keywords
- inorganic insulated
- wire
- inorganic
- conductor
- electric wire
- 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.)
- Granted
Links
- 239000011248 coating agent Substances 0.000 claims abstract description 29
- 238000000576 coating method Methods 0.000 claims abstract description 29
- 229910052751 metal Inorganic materials 0.000 claims abstract description 18
- 239000002184 metal Substances 0.000 claims abstract description 18
- 239000000344 soap Substances 0.000 claims abstract description 13
- 239000004020 conductor Substances 0.000 claims abstract description 11
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 8
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 8
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims abstract description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims abstract description 3
- 238000005979 thermal decomposition reaction Methods 0.000 claims description 5
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 2
- 150000007524 organic acids Chemical class 0.000 abstract description 5
- 150000003839 salts Chemical class 0.000 abstract description 5
- XYIBRDXRRQCHLP-UHFFFAOYSA-N ethyl acetoacetate Chemical compound CCOC(=O)CC(C)=O XYIBRDXRRQCHLP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 239000004215 Carbon black (E152) Substances 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- 229930195733 hydrocarbon Natural products 0.000 abstract 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 abstract 1
- 238000005245 sintering Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 19
- 239000002904 solvent Substances 0.000 description 11
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 10
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 4
- 239000011550 stock solution Substances 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 150000004703 alkoxides Chemical class 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- 229940093475 2-ethoxyethanol Drugs 0.000 description 1
- HNNQYHFROJDYHQ-UHFFFAOYSA-N 3-(4-ethylcyclohexyl)propanoic acid 3-(3-ethylcyclopentyl)propanoic acid Chemical compound CCC1CCC(CCC(O)=O)C1.CCC1CCC(CCC(O)=O)CC1 HNNQYHFROJDYHQ-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 125000005609 naphthenate group Chemical group 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Landscapes
- Insulated Conductors (AREA)
- Inorganic Insulating Materials (AREA)
- Paints Or Removers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高温度、高真空の過酷
な環境下で使用される無機絶縁電線に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inorganic insulated wire used in a severe environment of high temperature and high vacuum.
【０００２】[0002]
【従来の技術】従来、高い耐熱性が要求される用途に
は、ポリイミドやフッ素系樹脂などの耐熱性有機樹脂を
被覆した絶縁電線が使用されてきた。しかるに、近年、
300℃を越える過酷な温度環境下、高真空下で使用して
も絶縁特性や機械特性などが低下することのない絶縁電
線の要求があり、このような用途には、耐熱温度がたか
だか 200℃前後の従来の有機樹脂を被覆した絶縁電線で
は、耐熱性やガスの放出性の点で不十分であった。2. Description of the Related Art Heretofore, insulated wires coated with a heat-resistant organic resin such as polyimide or fluorine resin have been used for applications requiring high heat resistance. However, in recent years,
There is a demand for insulated wires that do not deteriorate the insulation properties and mechanical properties even when used in a high vacuum under a severe temperature environment exceeding 300 ° C. For such applications, the heat resistance temperature is at most 200 ° C. Insulated electric wires coated with the conventional organic resin before and after were insufficient in terms of heat resistance and gas emission.
【０００３】このような中で、近時、ステアリン酸やオ
クチル酸などの有機酸の金属塩や、金属アルコキシドな
どを原料として熱分解法により、導体上に絶縁性の無機
被膜、たとえばSi、Al、Zr、Mgなどの金属酸化膜を形成
した、いわゆるセラミック巻線と呼ばれる無機絶縁電線
が開発され、従来の有機系耐熱絶縁電線よりはるかに高
い温度下、高い真空度下での使用が期待できることから
注目されている。Under these circumstances, recently, an insulating inorganic coating such as Si or Al is formed on a conductor by a thermal decomposition method using a metal salt of an organic acid such as stearic acid or octylic acid or a metal alkoxide as a raw material. Inorganic insulated wires, which are so-called ceramic windings, on which a metal oxide film such as Zr, Mg, etc. is formed have been developed, and it can be expected to be used at much higher temperatures and higher vacuum levels than conventional organic heat-resistant insulated wires. Has been attracting attention.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、従来の
無機絶縁電線は、原料を導体上に塗布するための塗布液
の調製が困難で、均一で十分な膜厚を有する電気特性の
良好な無機絶縁被膜を安定して形成することが難しいた
め、信頼性に乏しいという問題があった。すなわち、有
機酸の金属塩では、これを溶解する溶剤が限られる、高
濃度の調製が困難である、塗布液の粘度が時間の経過と
ともに変化するなどの問題があり、また、金属アルコキ
シドでは、金属アルコキシドを加水分解して重合させ、
水酸化物もしくは酸素で架橋したゾル状の塗布液を調製
しなければならず、いずれの場合も、均一で膜厚の十分
な電気特性に優れた絶縁被膜を得ることが困難であっ
た。However, in the conventional inorganic insulated wire, it is difficult to prepare a coating solution for coating the raw material on the conductor, and the inorganic insulated wire has a uniform and sufficient film thickness and good electrical characteristics. Since it is difficult to form a film stably, there is a problem of poor reliability. That is, in the metal salt of an organic acid, there are problems that the solvent that dissolves it is limited, it is difficult to prepare a high concentration, the viscosity of the coating solution changes with the passage of time, and the metal alkoxide, Hydrolyze and polymerize metal alkoxide,
It was necessary to prepare a sol-like coating solution crosslinked with hydroxide or oxygen, and in any case, it was difficult to obtain an insulating coating film that was uniform and had a sufficient film thickness and excellent electrical characteristics.
【０００５】本発明はこのような従来技術の課題に対処
してなされたもので、耐熱性に優れ、また、ガスの放出
が少ないうえ、膜厚も均一かつ十分で優れた電気特性を
安定して有する無機絶縁被膜を具備した高信頼性の無機
絶縁電線を提供することを目的とする。The present invention has been made in response to the problems of the prior art as described above, and is excellent in heat resistance, emits less gas, and has a uniform and sufficient film thickness to stabilize excellent electrical characteristics. It is an object of the present invention to provide a highly reliable inorganic insulated electric wire provided with the inorganic insulating coating.
【０００６】[0006]
【課題を解決するための手段】本発明者らはこのような
無機絶縁電線を見出すべく鋭意検討を重ねた結果、下記
に示すような特定の有機酸のAl塩と、金属セッケンを併
用することにより、上記目的が達成されることを見出
し、本発明を完成するに至った。Means for Solving the Problems As a result of intensive studies to find out such an inorganic insulated wire, the present inventors have found that a specific organic acid Al salt as shown below is used in combination with a metal soap. As a result, they have found that the above objects can be achieved, and completed the present invention.
【０００７】すなわち、本発明の無機絶縁電線は、導体
上に、 （ａ）一般式That is, the inorganic insulated electric wire of the present invention comprises:
【化２】 （式中、Ｒ1 は炭素数 1〜20の炭化水素基、Ｒ2 はメチ
ル基またはエチル基）で表されるアルミニウム塩と、
（ｂ）金属セッケンの混合物の熱分解により形成された
金属酸化物からなる無機絶縁被膜を具備したことを特徴
とするものである。 （ａ）のアルミニウム塩として
は、上記一般式で表されるアルミニウム塩のうち、特
に、Ｒ1 の炭素数が 1〜17のものが、緻密で高い絶縁耐
圧が得られることから好ましい。なお、Ｒ1 の炭素数が
20を越えるものでは、成膜後も有機分が残りガスが発生
しやすくなり、高真空下での使用に不適当となる。[Chemical 2] (Wherein R 1 is a hydrocarbon group having 1 to 20 carbon atoms, R 2 is a methyl group or an ethyl group), and
(B) An inorganic insulating coating film made of a metal oxide formed by thermal decomposition of a mixture of metal soaps is provided. As the aluminum salt of (a), among the aluminum salts represented by the above general formula, those having R 1 having 1 to 17 carbon atoms are particularly preferable, since a dense and high withstand voltage can be obtained. The carbon number of R 1 is
If it exceeds 20, the organic content remains after the film is formed, and gas is apt to be generated, which makes it unsuitable for use under high vacuum.
【０００８】また、（ｂ）の金属セッケンとしては、公
知のものの中から任意に選択して使用されてよいが、オ
クチル酸Si、オクチル酸Mg、ナフテン酸Zrのように常温
で液体のものが、混合の容易性、成膜性の点から好まし
い。オクチル酸Alのような常温で固体のものを使用する
場合には、適当な溶剤に溶解して使用することが望まし
い。The metal soap (b) may be arbitrarily selected from known ones and used, but those which are liquid at room temperature, such as Si octylate, Mg octylate and Zr naphthenate. It is preferable in terms of easiness of mixing and film formability. When using a solid such as Al octylate at room temperature, it is desirable to dissolve it in a suitable solvent before use.
【０００９】これらは、いずれも 1種を単独で使用して
もよく、 2種以上を混合して使用するようにしてもよ
い。Any of these may be used alone or in combination of two or more.
【００１０】本発明の金属酸化物からなる無機絶縁被膜
は、このような（ａ）および（ｂ）の各成分を用いて、
たとえば次のようにして形成することができる。すなわ
ち、まず、（ａ）のアルミニウム塩に、（ｂ）の金属セ
ッケンを混合して塗布液を調製する。（ａ）のアルミニ
ウム塩は、原液をそのまま用いるようにしてもよいが、
適当な溶剤で濃度80％以下に希釈して用いることが望ま
しい。これは、原液乃至80％を超える高濃度のものは安
定性に欠けるためで、特に、上記一般式中、Ｒ1 の炭素
数が 5以下のものは、濃度80％を越える高濃度液で使用
することは実際上困難である。なお、アルミニウム塩
は、アルコール系、エーテル系、芳香族系など、公知の
任意の有機溶剤にゲル化することなく良く溶解して、任
意の濃度の希釈液に調製することができる。The inorganic insulating coating film composed of the metal oxide of the present invention comprises the components (a) and (b) as described above.
For example, it can be formed as follows. That is, first, the aluminum salt of (a) is mixed with the metal soap of (b) to prepare a coating liquid. As the aluminum salt of (a), the undiluted solution may be used as it is,
It is desirable to dilute with a suitable solvent to a concentration of 80% or less before use. This is because undiluted solutions or high-concentration liquids exceeding 80% lack stability. Especially, in the above general formula, R 1 having 5 or less carbon atoms is used in high-concentration liquids exceeding 80%. It is practically difficult to do. The aluminum salt can be well dissolved in any known organic solvent such as alcohol-based, ether-based, or aromatic-based solvent without gelation, and can be prepared as a diluting solution having any concentration.
【００１１】また、（ｂ）の金属セッケンは、前述した
ように、常温で液体のものは原液をそのまま、常温で固
体のものは適当な溶剤にできるだけ高濃度に溶解して、
（ａ）のアルミニウム塩と混合することが望ましい。な
お、この（ｂ）の金属セッケンは、（ａ）のアルミニウ
ム塩単独で成膜した場合の、被膜中のピンホールの発生
を抑え、被膜の絶縁耐圧を向上させる効果を有するもの
と考えられる。（ｂ）の金属セッケンの混合比は、使用
する原液もしくは溶液として、塗布液全体の15〜50％と
なる範囲が適している。これは、15％未満ではピンホー
ルの発生を十分に抑制することができず、また、逆に50
％を越えると成膜性が低下するようになるからである。Further, as described above, the metal soap (b) is a stock solution that is liquid at room temperature, the undiluted solution as it is, and a solid solution at room temperature that is dissolved in a suitable solvent at a concentration as high as possible.
It is desirable to mix with the aluminum salt of (a). The metal soap (b) is considered to have the effect of suppressing the generation of pinholes in the film and improving the withstand voltage of the film when the aluminum salt of (a) alone is formed. The mixing ratio of the metal soap of (b) is preferably in the range of 15 to 50% of the whole coating solution as the stock solution or solution to be used. This is because if it is less than 15%, it is not possible to sufficiently suppress the occurrence of pinholes, and conversely 50%.
This is because if it exceeds%, the film formability will decrease.
【００１２】次いで、このようにして調整した塗布液
を、ディップコート、フェルトコートなど通常の方法で
導体上に塗布した後、加熱焼成を行う。焼成温度は、 4
00〜800 ℃程度が適当で、 400℃より低いと含有成分の
熱分解が十分に進まずに有機分が被膜中に残留し、これ
が電線を高温、高真空下で使用した場合に外部に徐々に
排出してくるおそれがある。逆に 800℃より高いと熱分
解が急速に起こり、被膜が導体上から剥離するおそれが
ある。この加熱焼成によって、アルミニウム塩および金
属セッケンが分解し、有機分が溶剤とともに揮散除去さ
れ、ピンホールのない緻密で、膜厚も均一な金属酸化物
からなる無機絶縁被膜が形成される。この無機絶縁被膜
は、常用耐熱温度1000℃と極めて優れた耐熱性を有して
おり、かつ、絶縁特性にも優れている。また、被膜中の
有機分の残存率が低いため、ガスを放出するおそれがほ
とんどなく、さらに、焼結されていないので可とう性も
良好である。なお、この塗布および加熱焼成工程は、必
要に応じて複数回繰り返され、所要の厚さの無機絶縁被
膜が形成される。Next, the coating solution thus prepared is coated on the conductor by a usual method such as dip coating or felt coating, and then heated and baked. The firing temperature is 4
A temperature of about 00 to 800 ℃ is appropriate, and if it is lower than 400 ℃, the thermal decomposition of the contained components does not proceed sufficiently and the organic content remains in the film, which gradually becomes outside when the wire is used under high temperature and high vacuum. May be discharged to. On the other hand, if the temperature is higher than 800 ° C, thermal decomposition will occur rapidly and the coating may peel off from the conductor. By this heating and firing, the aluminum salt and the metal soap are decomposed, the organic components are volatilized and removed together with the solvent, and a dense inorganic insulating coating film having no pinhole and having a uniform film thickness is formed. This inorganic insulating coating film has a very high heat resistance of 1000 ° C. and has an excellent insulating property. In addition, since the residual rate of organic components in the coating is low, there is almost no possibility of releasing gas, and since it is not sintered, it has good flexibility. The coating and heating / baking steps are repeated a plurality of times as necessary to form an inorganic insulating coating film having a required thickness.
【００１３】本発明に使用する導体としては、上記加熱
焼成温度範囲内で導体の電気抵抗があまり低下すること
のない耐熱性に優れたものが好ましく、たとえばAg線、
Au線、Pt線、Ni線、Cu線、これらの合金線またはこれら
をメッキしたCu線、あるいは、ステンレスやAlを被覆し
たCu線などが例示される。The conductor used in the present invention is preferably a conductor having excellent heat resistance that does not significantly lower the electric resistance of the conductor within the above heating and firing temperature range. For example, Ag wire,
Examples include Au wire, Pt wire, Ni wire, Cu wire, alloy wire of these or Cu wire plated with these, or Cu wire coated with stainless steel or Al.
【００１４】[0014]
【作用】このように、本発明の無機絶縁電線において
は、特定のアルミニウム塩と金属セッケンを併用したこ
とにより、ピンホールのない緻密で、膜厚も均一かつ十
分な、金属酸化物からなる無機絶縁被膜を安定に形成す
ることができ、耐熱性に優れ、ガスの放出も少ない無機
絶縁電線であって、その電気特性を向上かつ安定化する
ことができる。したがって、 300℃を越える過酷な温度
環境下、高真空下で使用可能な絶縁電線として、高い信
頼性を有したものとなる。As described above, in the inorganic insulated wire of the present invention, by using the specific aluminum salt and the metal soap together, the inorganic insulating wire made of a metal oxide which is dense without pinholes and has a uniform and sufficient film thickness It is an inorganic insulated wire that can form an insulating film stably, has excellent heat resistance, and emits little gas, and its electrical characteristics can be improved and stabilized. Therefore, the insulated wire with high reliability can be used under a high vacuum in a severe temperature environment exceeding 300 ° C.
【００１５】[0015]
【実施例】次に、本発明の実施例を記載する。EXAMPLES Next, examples of the present invention will be described.
【００１６】実施例１、２ Al -ジ-n- ブトキシドモノエチルアセトアセテートの50
％溶液（溶剤 日石 7号ソルベント（商品名）、表中50
％Alアセテートと略記）と、オクチル酸Mgの70％溶液
（溶剤 キシレン）とを重量比 1:1の割合で混合して塗
布液を調製した。次いで、この塗布液を 1mmφのNi線
に、ディップ法（実施例１）もしくはスポンジ含浸法
（実施例２）により塗布し、 550℃、10分間の条件で焼
付けて、膜厚10μｍの絶縁被膜を形成して無機絶縁電線
を得た。得られた無機絶縁電線の外観および電気特性を
表１に示す。Examples 1 and 2 50 of Al-di-n-butoxide monoethylacetoacetate
% Solution (solvent Nisseki No. 7 solvent (trade name), 50 in the table)
% Al acetate) and 70% solution of Mg octylate (solvent xylene) were mixed at a weight ratio of 1: 1 to prepare a coating solution. Then, this coating solution is applied to a Ni wire of 1 mmφ by a dipping method (Example 1) or a sponge impregnation method (Example 2), and baked at 550 ° C. for 10 minutes to form an insulating film having a thickness of 10 μm. It formed and the inorganic insulated electric wire was obtained. Table 1 shows the appearance and electrical characteristics of the obtained inorganic insulated electric wire.
【００１７】実施例３、４ 塗布液として、Al -ジ-n- ブトキシドモノエチルアセト
アセテートの80％溶液（溶剤 日石 7号ソルベント、表
中80％Alアセテートと略記）と、オクチル酸Si原液と、
ナフテン酸Zr原液とを重量比 3:1:1の割合で混合して調
製したものを用いた以外は、実施例１、２と同様にし
て、 1mmφのNi線に塗布し焼付けて、膜厚10μｍの絶縁
被膜を形成して無機絶縁電線を得た。得られた無機絶縁
電線の外観および電気特性を表１に示す。Examples 3 and 4 As coating solutions, 80% Al-di-n-butoxide monoethylacetoacetate solution (solvent Nisseki No. 7 solvent, abbreviated as 80% Al acetate in the table) and Si octylate stock solution When,
Except for using the one prepared by mixing the naphthenic acid Zr stock solution in a weight ratio of 3: 1: 1, the Ni wire of 1 mmφ was coated and baked in the same manner as in Examples 1 and 2 to obtain a film thickness. An insulating coating of 10 μm was formed to obtain an inorganic insulated electric wire. Table 1 shows the appearance and electrical characteristics of the obtained inorganic insulated electric wire.
【００１８】比較例１、２ 塗布液として、Al -ジ-n- ブトキシドモノエチルアセト
アセテートの50％溶液を単独で用いた以外は、実施例
１、２と同様にして 1mmφのNi線に塗布し焼付けて、膜
厚10μｍの絶縁被膜を形成して無機絶縁電線を得た。得
られた無機絶縁電線の外観および電気特性を表１に示
す。Comparative Examples 1 and 2 A 1 mm diameter Ni wire was coated in the same manner as in Examples 1 and 2 except that a 50% solution of Al-di-n-butoxide monoethylacetoacetate was used alone as the coating solution. After baking, an insulating coating having a film thickness of 10 μm was formed to obtain an inorganic insulated electric wire. Table 1 shows the appearance and electrical characteristics of the obtained inorganic insulated electric wire.
【００１９】比較例３、４ オクチル酸Alと解こう剤のアセチルアセトンAlとを、ト
ルエンと2-エトキシエタノールとの混合溶剤（混合比
2:1）に、濃度がそれぞれ25％、2 ％となるように溶解
して調製した塗布液を、実施例１、２と同様にして 1mm
φのNi線に、ディップ法（実施例１）もしくはスポンジ
含浸法（実施例２）により塗布し焼付けたが、 1回の塗
布焼付けでは、表１に示したように、膜厚 1〜2 μｍの
絶縁被膜が形成されたにすぎなかった。Comparative Examples 3 and 4 Al octylate and acetylacetone Al as a peptizer were mixed with a mixed solvent of toluene and 2-ethoxyethanol (mixing ratio).
The coating solution prepared by dissolving in 2: 1) to have concentrations of 25% and 2%, respectively, was prepared in the same manner as in Examples 1 and 2, and
The Ni wire of φ was coated by the dip method (Example 1) or the sponge impregnation method (Example 2) and baked. However, as shown in Table 1, the film thickness of 1 to 2 μm Only the insulating film of 1 was formed.
【００２０】[0020]
【表１】 [Table 1]
【００２１】[0021]
【発明の効果】以上の実施例からも明らかなように、本
発明の無機絶縁電線は、特定のアルミニウム塩と金属セ
ッケンの混合物の併用により、ピンホールのない緻密
で、均一かつ十分な膜厚を有する金属酸化物からなる無
機絶縁被膜が形成されるので、耐熱性に優れ、ガスの放
出が少なく、しかも良好かつ安定した電気特性を有した
ものとなる。したがって、 300℃を越える過酷な温度環
境下、高真空下で使用する絶縁電線として極めて有用で
ある。As is clear from the above examples, the inorganic insulated electric wire of the present invention has a pinhole-free, dense, uniform and sufficient film thickness by using a mixture of a specific aluminum salt and a metal soap. Since the inorganic insulating coating composed of the metal oxide having the above is formed, it has excellent heat resistance, little gas emission, and good and stable electrical characteristics. Therefore, it is extremely useful as an insulated wire used in a high vacuum under a severe temperature environment exceeding 300 ° C.
Claims (1)
ル基またはエチル基）で表されるアルミニウム塩と、
（ｂ）金属セッケンの混合物の熱分解により形成された
金属酸化物からなる無機絶縁被膜を具備したことを特徴
とする無機絶縁電線。1. On a conductor, (a) a general formula: (Wherein R 1 is a hydrocarbon group having 1 to 20 carbon atoms, R 2 is a methyl group or an ethyl group), and
(B) An inorganic insulated wire comprising an inorganic insulating coating film made of a metal oxide formed by thermal decomposition of a mixture of metal soaps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04162660A JP3143212B2 (en) | 1992-06-22 | 1992-06-22 | Inorganic insulated wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04162660A JP3143212B2 (en) | 1992-06-22 | 1992-06-22 | Inorganic insulated wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH065124A true JPH065124A (en) | 1994-01-14 |
| JP3143212B2 JP3143212B2 (en) | 2001-03-07 |
Family
ID=15758859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04162660A Expired - Fee Related JP3143212B2 (en) | 1992-06-22 | 1992-06-22 | Inorganic insulated wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3143212B2 (en) |
-
1992
- 1992-06-22 JP JP04162660A patent/JP3143212B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3143212B2 (en) | 2001-03-07 |
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