DE880773C - Process for the production of insulation layers - Google Patents
Process for the production of insulation layersInfo
- Publication number
- DE880773C DE880773C DEL6145A DEL0006145A DE880773C DE 880773 C DE880773 C DE 880773C DE L6145 A DEL6145 A DE L6145A DE L0006145 A DEL0006145 A DE L0006145A DE 880773 C DE880773 C DE 880773C
- Authority
- DE
- Germany
- Prior art keywords
- layer
- collodion
- production
- insulation layers
- layers
- 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.)
- Expired
Links
- 238000009413 insulation Methods 0.000 title claims description 8
- 238000000034 method Methods 0.000 title claims description 7
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 230000008021 deposition Effects 0.000 claims 1
- 238000007654 immersion Methods 0.000 claims 1
- 238000002955 isolation Methods 0.000 claims 1
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 239000000020 Nitrocellulose Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 229920001220 nitrocellulos Polymers 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 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
- FRWYFWZENXDZMU-UHFFFAOYSA-N 2-iodoquinoline Chemical compound C1=CC=CC2=NC(I)=CC=C21 FRWYFWZENXDZMU-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229940072049 amyl acetate Drugs 0.000 description 1
- PGMYKACGEOXYJE-UHFFFAOYSA-N anhydrous amyl acetate Natural products CCCCCOC(C)=O PGMYKACGEOXYJE-UHFFFAOYSA-N 0.000 description 1
- LTPBRCUWZOMYOC-UHFFFAOYSA-N beryllium oxide Inorganic materials O=[Be] LTPBRCUWZOMYOC-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- MNWFXJYAOYHMED-UHFFFAOYSA-M heptanoate Chemical compound CCCCCCC([O-])=O MNWFXJYAOYHMED-UHFFFAOYSA-M 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/10—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances metallic oxides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/08—Manufacture of heaters for indirectly-heated cathodes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
Description
Verfahren zur Herstellung von Isolationsschichten Die Erfindung richtet sich auf ein neuartiges Herstellungsverfahren von Isolationsschichten, z. B. für Heizwendeln, insbesondere aus Aluminium-, Magnesium- oder Berylliumoxyd, zur Verwendung beispielsweise an Heizwendeln von Rundfunk- und Kathodenstrahlröhren.Process for the production of insulation layers The invention is directed focus on a new manufacturing process for insulating layers, e.g. B. for Heating coils, in particular made of aluminum, magnesium or beryllium oxide, for use for example on heating coils of radio and cathode ray tubes.
Es ist allgemein üblich, die Isolationsschichten von Heizwendeln durch Sprühen mittels Sprühpistole oder durch Eintauchen in entsprechend zähflüsse Pasten herzustellen bzw. aufzubringen. Als Bindemittel dient dabei ein Zusatz von Nitrocellulose (Kollodiumlösung) oder ein etwa ioo/oiger Aluminiumnitratzusatz. Die Nitrocellulose hat den Nachteil, daß der bei dem Sinterprozeß zunächst entstehende Kohlenstoff evtl. vor seiner Verbrennung mit dem Wolframdraht der Wendel Karbide bilden kann. die die Bruchfestigkeit des Drahtes vermindern oder in die Schicht einwandern und dadurch den Isolationsschichtwiderstand herabsetzen. Ein Zusatz von A1 (NO")", der meistens bei etwa ioo/o liegt, hat den Nachteil, daß dadurch die Schichtisolation herabgesetzt wird, da diese Verbindung wegen der großen Wasserlöslichkeit nie den gleichen Reinheitsgrad erreichen kann wie A12(),.It is common practice to have heating coils through the insulation layers Spraying with a spray gun or by dipping into corresponding viscous pastes to produce or apply. Nitrocellulose is added as a binding agent (Collodion solution) or an approximately 100% aluminum nitrate additive. The nitrocellulose has the disadvantage that the carbon initially formed in the sintering process possibly the filament can form carbides with the tungsten wire before it is burned. which reduce the breaking strength of the wire or migrate into the layer and thereby reducing the insulation layer resistance. An addition of A1 (NO ")", the is usually around 100 per cent, has the disadvantage that it reduces the layer insulation is reduced, since this compound never denies because of its high solubility in water can achieve the same degree of purity as A12 () ,.
Erfindungsgemäß wird nun vorliegend ein Verfahren zur Herstellung von Heizwendelisolationsschichten beschrieben, bei dem auf den Heizdraht zuerst eine kollodiumfreie Schicht und darüber nochmals eine kollodiumhaltige Schicht aufgebracht wird. Dadurch wird eine schädliche Wolf ramkarbidbildung unmöglich gemacht, da der Wolframdraht durch die untere kollodiumfreie Schicht geschützt ist. Besondere Zusätze, deren Isolationsfähigkeit geringer ist als die des reinen Aluminiumoxyds A1203; sind nur in Konzentrationen von höchstens a, i °/o erforderlich.According to the present invention, there is now a method of production of electrofusion insulation layers, where on the heating wire first a collodion-free layer and then another layer containing collodions is applied will. This makes harmful tungsten carbide formation impossible, since the Tungsten wire is protected by the lower collodion-free layer. Special additives, whose insulation capacity is lower than that of pure aluminum oxide A1203; are only required in concentrations of at most a, i ° / o.
Der Herstellungsprozeß der erfindungsgemäßen Wendel ist sehr einfach. Die Wendel wird in ein A120.-Bad getaucht, welches A120., Kollodium, eine Reihe organischer Lösungsmittel, z. B. Aceton, Amylacetat oder Isopropylalkohol,. und einen i -bis io%@igen Zusatz einer Lösung von etwa i °/o Al . (N03)3 in Methanol enthält. Arbeitet die Wendel als negative Elektrode in diesem Bad, so überzieht sie sich mit einer kollodiumfreien Schicht von A1203, arbeitet sie als positive Elektrode, so wird -eine kollodiumhaltige Abscheidung erzielt. Man läßt also erfindungsgemäß die Wendel hintereinander als negative und als positive Elektrode in dem beschriebenen Bade arbeiten und erhält so die beiden erfindungsgemäß beabsichtigten Schichten übereinander auf der gleichen Wendel,The manufacturing process of the helix according to the invention is very simple. The coil is immersed in an A120. Bath, which A120., Collodion, a series organic solvent, e.g. B. acetone, amyl acetate or isopropyl alcohol. and an i-to io% addition of a solution of about i ° / o Al. (N03) 3 in methanol contains. If the filament works as a negative electrode in this bath, it is coated If they cover themselves with a collodion free layer of A1203, it works as a positive Electrode, a collodion-containing deposit is achieved. So you can according to the invention the filament one behind the other as a negative and a positive electrode in the one described Work in the bath and thus obtain the two layers intended according to the invention one above the other on the same spiral,
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEL6145A DE880773C (en) | 1950-10-28 | 1950-10-29 | Process for the production of insulation layers |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1044213X | 1950-10-28 | ||
| DEL6145A DE880773C (en) | 1950-10-28 | 1950-10-29 | Process for the production of insulation layers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE880773C true DE880773C (en) | 1953-06-25 |
Family
ID=25984976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEL6145A Expired DE880773C (en) | 1950-10-28 | 1950-10-29 | Process for the production of insulation layers |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE880773C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1045554B (en) * | 1956-11-30 | 1958-12-04 | Telefunken Gmbh | Process for the production of an immersion and spray-proof, consisting of aluminum oxide insulating layer on a burner for indirectly heated glow cathodes |
| DE1090774B (en) * | 1959-03-20 | 1960-10-13 | Siemens Ag | Heating element for indirectly heated cathodes and process for the production of an insulating coating |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2307018A (en) * | 1938-06-25 | 1943-01-05 | Raytheon Production Corp | Cataphoretic deposition of insulating coatings |
-
1950
- 1950-10-29 DE DEL6145A patent/DE880773C/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2307018A (en) * | 1938-06-25 | 1943-01-05 | Raytheon Production Corp | Cataphoretic deposition of insulating coatings |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1045554B (en) * | 1956-11-30 | 1958-12-04 | Telefunken Gmbh | Process for the production of an immersion and spray-proof, consisting of aluminum oxide insulating layer on a burner for indirectly heated glow cathodes |
| DE1090774B (en) * | 1959-03-20 | 1960-10-13 | Siemens Ag | Heating element for indirectly heated cathodes and process for the production of an insulating coating |
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