WO1998011030A1 - Glasartige zusammensetzung - Google Patents
Glasartige zusammensetzung Download PDFInfo
- Publication number
- WO1998011030A1 WO1998011030A1 PCT/EP1996/004012 EP9604012W WO9811030A1 WO 1998011030 A1 WO1998011030 A1 WO 1998011030A1 EP 9604012 W EP9604012 W EP 9604012W WO 9811030 A1 WO9811030 A1 WO 9811030A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- weight
- parts
- pbo
- alkali metal
- metal oxides
- Prior art date
Links
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
- H01B3/08—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances quartz; glass; glass wool; slag wool; vitreous enamels
- H01B3/087—Chemical composition of glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
- C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
- C03C3/072—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/24—Fusion seal compositions being frit compositions having non-frit additions, i.e. for use as seals between dissimilar materials, e.g. glass and metal; Glass solders
Definitions
- the present invention relates to a glass-like composition which is suitable for use as a sealing material for mineral-insulated electrical lines, and to a sealing material which consists of the glass-like composition.
- Mineral-insulated cables consist of metal pipes serving as sheaths, in which one or more wire-shaped, low-resistance wires are used as conductors, which are surrounded on all sides by well-insulating mineral powder, which is pressed into the sheath. You will e.g. used in measurement and control technology.
- the jacket is made of oxidation and corrosion resistant material, for example stainless steel or chrome-nickel alloys, for use at high temperatures.
- the sheath material should be easy to weld or solder and have good mechanical properties.
- the low-resistance conductors are against each other or against the jacket by mineral powders, such as
- ERSATZBlA ⁇ (RULE 26 Magnesium oxide or aluminum oxide isolated.
- the powders used for insulation are distinguished by high melting temperatures, for example above 2000 ° C., and high specific electrical resistances, for example 10 12 to 10 13 ohm ⁇ m at 400 ° C. and approx. 10 8 ohm ⁇ m at 800 ° C.
- such mineral powders are very hygroscopic.
- the powder can absorb so much moisture from the surrounding atmosphere within a few minutes that the insulation resistance between the wire and the sheath or between the wires drops by several orders of magnitude. For this reason, it is necessary that the cable ends are permanently hermetically sealed to protect them from moisture in order to prevent the ingress of moisture. This is particularly true when high-resistance elements, for example sensors in exhaust systems of internal combustion engines, are to be connected to the wires.
- the moisture-proof condition of the cables must be preserved by hermetically sealing the cable ends.
- electrical potentials due to polarization effects in the glass between the wires or between the wires and the jacket have a disruptive effect on the signal evaluation.
- the object of the present invention is to provide glass-like compositions which are suitable as sealing materials for jacket pipe ends, in particular of mineral-insulated lines, which still have good insulation properties even at higher temperatures up to 600 ° C.
- compositions according to the invention can serve as closure materials which enable the closures of mineral-insulated electrical
- ERSATZBLAH RULE 26 Use cables also under conditions in which high temperatures can occur, for example in exhaust systems of motor vehicles.
- the compositions according to the invention enable the mineral-insulated lines to be completely sealed against moisture even under these conditions.
- the specific insulation resistances can exceed values of more than 10 MOh x cm at temperatures of 600 * C.
- No or very little electrical interference potential occurs between the wires of the mineral-insulated lines or between the wire and the jacket.
- the materials are resistant to temperatures of up to 650 ° C in both neutral and acidic atmospheres, which is important for the use of these materials in exhaust systems. They have a high resistance to aging and mechanical stability. The closure is free of mechanical damage and moisture-proof, especially after exposure to vibrations. These good properties are retained even when the temperature changes drastically.
- compositions according to the invention contain the following constituents:
- compositions are preferred:
- composition is particularly preferred:
- compositions are particularly preferred:
- Another preferred composition contains:
- the coefficients of expansion being able to be adapted to the coefficients of expansion of the conductors or jacket tubes, so that there are only low thermal stresses even when the temperature changes.
- the coefficients of expansion of the sealing compounds are set so that they are smaller than the coefficient of expansion of the casing pipes used.
- the ends of the mineral-insulated lines can also be closed with a ceramic molded part which has openings for the wires to be passed through.
- This ceramic molded part can be pushed over the ends at the ends and inserted into the sheath or enclose it. There it can then preferably be sealed with the glass-like compositions according to the invention.
- This embodiment is particularly insensitive to lateral mechanical loads and bending forces which do not engage on the lead-out wires.
- 1 shows a mineral-insulated line in a partially cut shape with one wire
- FIG. 2 shows a section through the mineral-insulated line of FIG. 1;
- FIG. 3 shows a ceramic molded part for sealing a mineralized line with four wires in a view from above;
- Figure 4 shows the molding of Fig. 3 in a
- FIG. 5 is a graphical representation of the resistance values in Table 1.
- the mineral-insulated line 10 has an outer jacket 12, which consists of a metal tube.
- a core 14 is arranged centrally within this jacket as an electrical line, which is surrounded on all sides by a mineral powder 16.
- a glass closure which consists of the glass-like compositions according to the invention.
- FIG. 3 shows a ceramic molded part 20 in the form of a cylindrical ceramic body, which has a total of four openings 22 for the passage of four wires 14 having.
- the ceramic molded part is shown in a side view in FIG. 4. It can be pushed onto the wires 14 protruding from the mineral-insulated line 10 and pushed onto the open side of the mineral-insulated line and is sealed there with a glass closure made from the glass compositions according to the invention.
- the expansion coefficient of the glass closure 18 is set to be smaller than the expansion coefficient of the casing 12, then after the liquid-melted glass closure has cooled, an external force is exerted on the glass closure 18 by the more shrinking casing 12. This leads to a press fit of the glass closure 18 between the jacket 12 and the core (s) 14.
- Figure 1 shows a cross section through a mineral insulated line with one core.
- the wire and the jacket are made of Inconel 600 alloy.
- the wire is insulated from the jacket by MgO.
- the mineral-insulated cable was closed as follows:
- the warm end of the jacket material was pre-oxidized at a temperature of 650 ° C until a clear oxidation layer was visible.
- the powder glass was then placed in the warm end.
- the powder had the following composition: 27% by weight Si0 2
- the warm end was placed in an oven and the glass melted for 6 minutes at a temperature of 975 ° C. The mixture was then allowed to cool to room temperature in still air.
- the end closed in this way has an insulation resistance core to core or core to jacket at 600 ° C of more than 20 MOhm.
- the insulation resistances R measured at different temperatures in the range from 200 to 600 ° C. and at DC voltages of 10 V, 50 V and 100 V are summarized in Table 1 below and shown graphically in FIG. 5.
- the electrical potentials measured between the wires or between the wire and the jacket are less than 30 mV at 600 ° C. IN GAME 2
- the glass powder was introduced as in Example 1.
- the melting was carried out at a temperature of 1125 ° C. over a period of 6 minutes.
- the aftertreatment was carried out as in Example 1.
- the insulation resistances are more than 20MOhm at 400 ° C and more than 3MOhm at 600 ° C.
- the measured potentials at 600 ° C are less than 30 mV.
- the glass powder used had the following composition:
- Example 1 The drying, introduction of the warm end into the oven, melting, cooling and sealing of the cold end is carried out as in Example 1.
- the insulation resistances at 600 ° C are above 20 MOhm, the measured electrical potentials at 600 'C below 30 mV.
- the glass powder used had the following composition:
- Figure 2 shows a cross section through a mineral insulated line with four wires.
- the wire and the jacket are made of Inconel 600 alloy.
- the wire is insulated from the jacket by MgO.
- the mineral-insulated cable was closed as follows:
- the warm end of the jacket material was pre-oxidized at a temperature of 650 ° C until a clear oxidation layer was visible. Then the paste-shaped glass was placed in the warm end.
- the paste had the following composition:
- the glass powder has the same composition as in Example 3.
- the paste base consists of
- the paste was dried at 125 ° C for 20 minutes. Then the warm end was put in an oven and the glass was melted at a temperature of 975 ° C for 6 minutes. The mixture was then allowed to cool to room temperature in still air.
- the end closed in this way has an insulation resistance core to core or core to jacket at 600 ° C of more than 20 MOhm.
- the electrical potentials measured between the wires or between the wire and the jacket are less than 30 mV at 600 ° C.
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19509132A DE19509132A1 (de) | 1995-03-14 | 1995-03-14 | Glasartige Zusammensetzung |
DE59608522T DE59608522D1 (de) | 1996-09-12 | 1996-09-12 | Glasartige zusammensetzung |
EP96932514A EP0869924B1 (de) | 1996-09-12 | 1996-09-12 | Glasartige zusammensetzung |
PCT/EP1996/004012 WO1998011030A1 (de) | 1995-03-14 | 1996-09-12 | Glasartige zusammensetzung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19509132A DE19509132A1 (de) | 1995-03-14 | 1995-03-14 | Glasartige Zusammensetzung |
PCT/EP1996/004012 WO1998011030A1 (de) | 1995-03-14 | 1996-09-12 | Glasartige zusammensetzung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998011030A1 true WO1998011030A1 (de) | 1998-03-19 |
Family
ID=26013350
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1996/004012 WO1998011030A1 (de) | 1995-03-14 | 1996-09-12 | Glasartige zusammensetzung |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE19509132A1 (de) |
WO (1) | WO1998011030A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19509132A1 (de) * | 1995-03-14 | 1996-09-19 | Roth Technik Gmbh | Glasartige Zusammensetzung |
DE19739242A1 (de) * | 1997-09-08 | 1999-03-11 | Fraunhofer Ges Forschung | Verwendung kristallisierbarer Glaszusammensetzungen als Verschlußmaterial von Mantelleitungen |
DE19819283C1 (de) | 1998-04-30 | 1999-10-28 | Heraeus Electro Nite Int | Mineralisolierte elektrische Leitung |
GB2569298A (en) | 2017-12-12 | 2019-06-19 | Continental Automotive Gmbh | Sealing device for sealing a cold-end part of a thermocouple wire arrangement that is based on a mineral-insulated cable and thermocouple temperature sensing |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR861370A (fr) * | 1939-07-27 | 1941-02-07 | Alsthom Cgee | Verre ayant notamment la propriété d'être électriquement isolant à haute température |
DE810338C (de) * | 1950-03-30 | 1951-08-09 | Wmf Wuerttemberg Metallwaren | Technisches Email |
US2972544A (en) * | 1959-10-22 | 1961-02-21 | Westinghouse Electric Corp | Glass composition |
US3551171A (en) * | 1967-12-21 | 1970-12-29 | Gen Electric | Bao-pbo-sio2 semiconductor encapsulation glass |
JPS5330617A (en) * | 1976-09-03 | 1978-03-23 | Okuno Chem Ind Co | Composite of glass enamel |
DE19509132A1 (de) * | 1995-03-14 | 1996-09-19 | Roth Technik Gmbh | Glasartige Zusammensetzung |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4034330A (en) * | 1974-09-19 | 1977-07-05 | Tokyo Shibaura Electric Co., Ltd. | Sheath heater |
JPS6096541A (ja) * | 1983-10-27 | 1985-05-30 | Hoya Corp | 多焦点眼鏡レンズ用ガラス |
DE3400160A1 (de) * | 1984-01-04 | 1985-07-11 | Stiebel Eltron Gmbh & Co Kg, 3450 Holzminden | Verfahren zur herstellung eines rohrheizkoerperabschlusses |
DE3616547C1 (de) * | 1986-05-16 | 1987-09-03 | Heraeus Gmbh W C | Keramisches Abziehbild fuer Glanzedelmetall-Dekors |
DE3702837A1 (de) * | 1987-01-30 | 1988-08-11 | Nippon Electric Glass Co | Beschichtungsglas-zusammensetzung |
JP2666222B2 (ja) * | 1989-05-17 | 1997-10-22 | 日本電気硝子株式会社 | 封止材料 |
JPH0562804A (ja) * | 1990-11-30 | 1993-03-12 | Murata Mfg Co Ltd | 半導体磁器用オーミツク性電極材料およびそれを用いた半導体磁器素子 |
-
1995
- 1995-03-14 DE DE19509132A patent/DE19509132A1/de not_active Ceased
-
1996
- 1996-09-12 WO PCT/EP1996/004012 patent/WO1998011030A1/de active IP Right Grant
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR861370A (fr) * | 1939-07-27 | 1941-02-07 | Alsthom Cgee | Verre ayant notamment la propriété d'être électriquement isolant à haute température |
DE810338C (de) * | 1950-03-30 | 1951-08-09 | Wmf Wuerttemberg Metallwaren | Technisches Email |
US2972544A (en) * | 1959-10-22 | 1961-02-21 | Westinghouse Electric Corp | Glass composition |
US3551171A (en) * | 1967-12-21 | 1970-12-29 | Gen Electric | Bao-pbo-sio2 semiconductor encapsulation glass |
JPS5330617A (en) * | 1976-09-03 | 1978-03-23 | Okuno Chem Ind Co | Composite of glass enamel |
DE19509132A1 (de) * | 1995-03-14 | 1996-09-19 | Roth Technik Gmbh | Glasartige Zusammensetzung |
Non-Patent Citations (1)
Title |
---|
CHEMICAL ABSTRACTS, vol. 89, no. 18, 1978, Columbus, Ohio, US; abstract no. 151431, page 280; XP002032152 * |
Also Published As
Publication number | Publication date |
---|---|
DE19509132A1 (de) | 1996-09-19 |
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