WO1979000737A1 - Utilization of a glass-ceramic material as electrical insulator - Google Patents
Utilization of a glass-ceramic material as electrical insulator Download PDFInfo
- Publication number
- WO1979000737A1 WO1979000737A1 PCT/SE1979/000050 SE7900050W WO7900737A1 WO 1979000737 A1 WO1979000737 A1 WO 1979000737A1 SE 7900050 W SE7900050 W SE 7900050W WO 7900737 A1 WO7900737 A1 WO 7900737A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- glass
- per cent
- utilization
- electrical insulator
- weight
- Prior art date
Links
- 239000006112 glass ceramic composition Substances 0.000 title claims abstract description 13
- 239000000615 nonconductor Substances 0.000 title claims abstract description 10
- 239000012212 insulator Substances 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000002775 capsule Substances 0.000 claims abstract description 6
- 239000002893 slag Substances 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 4
- 229910018503 SF6 Inorganic materials 0.000 claims description 6
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 229960000909 sulfur hexafluoride Drugs 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 abstract description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 239000004593 Epoxy Substances 0.000 description 6
- 239000004020 conductor Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000002241 glass-ceramic Substances 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
- C03C10/0063—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing waste materials, e.g. slags
-
- 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
-
- 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
- H01B3/12—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances ceramics
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/06—Totally-enclosed installations, e.g. in metal casings
- H02G5/066—Devices for maintaining distance between conductor and enclosure
Definitions
- the present invention relates to utilization as electrical insulator of a glass-ceramic material made from blast furnace slag.
- an underground tube cable generally has an effective service length of at least 50 to 100 years, and to realize this aim v e ry high demands must be put on all details forming part of the cable, i.a. the required insulators which normally will not be replaced in the cable during the said period of time because of the highly complicated working moments associated with such a replacement. Therefore, in order to satisfy the high demands the insulators must have the following properties:
- the insulators have been made mainly from ceramic materials such as porcelain, of glass and of various epoxy compositions.
- the insulators consisting of epoxy material have proved to be those which are best suited for utilization in tube cables and tube capsules.
- Such insulators of epoxy material are manufactured by moulding, but the manufacturing process is highly complicated.
- the main object of the invention is to provide an electrical insulator which satisfies the demands set forth in the introductory part of this description, especial regard being taken to the requirement of resistance against ageing, simultaneously as the insulator is cheap to manufacture.
- This is rendered possible, according to the invention, by utilization as electrical insulator of a glass- ceramic material obtained from blast furnace slag, said glass-ceramic material having a content of CaO exceeding or equalling 10 per cent by weight, and preferably amounting to approximately 22 per cent by weight, the electrical insulator forming a pin insulator in a gas-insulated tube cable or tube capsule intended for high voltage.
- Glass- ceramic material or so-called glass-ceramics of the stated kind have proved to satisfy the aforestated demands on insulator material equally well as conventional glass- ceramic materials having a lower content of CaO and . produced from molten glass.
- As a starting material for glass-ceramic materials intended for insulators there is thus utilized extremely cheap so-called low-grade blast furnace slag which is intermixed with a suitable quantity, determinable in advance, of silica, Si0 2 , and treated in a controlled process utilizing high temperatur and high pressure.
- a material produced in this way and known under the denomination "Slaggsital" has the fol lowing particu lars:
- V-notch value 2.8 4.0 kgcms/cm 2
- the above-mentioned "Slaggsital" material has earlier been produced mainly in the shape of plates and discs and has been utilized as covering material in the building industry and as grinding material in the mining industry and the iron and steel industry and in the coal industry and also as acid-proof lining in the chemical industry.
- Figure 1 is a side view of a tube cable section which is partly cut up for the purpose of improved illustration
- Figure 2 is a sectional view on an enlarged scale of the tube cable shown in Figure 1.
- the tube cable consists of a sleeve which may be composed of an exterior part 10 and a shielding interior part 12. Disposed within the sleeve are three tubular conductors 14 of aluminium for three-phase operation which are applied symmetrically with a spacing from one another and the encasing sleeve, pin insulators 16 constructed in accordance with the principles of the invention and disposed in spaced relationship along the conductor units serving as spacing members. The ends of the cable section are closed by insulators also made according to the invention in the shape of end discs 18.
- the prefabricated tube cable sections can already in connection with the fabrication be filled with insulating medium up to operation pressure. When joining the sections together in the ground a minor quantity only of insulating medium need to be added. Alternately, all insulating medium may, of course, be supplied in one operation in connection with the mounting of the tube cable.
- the pin insulators 16 are directly secured onto the cable sleeve or (not shown), they may be mounted on a ring member which is inserted into the said sleeve.
- the insulating medium between the conductors 14 an t e conductors and the sleeve 10, 12 may consist of e.g. sulfur hexafloride, SF 6 , or gaseous nitrogen, N 2 , or a mixture of said gases. Oil may also be used in some cases.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Insulators (AREA)
- Installation Of Bus-Bars (AREA)
- Inorganic Insulating Materials (AREA)
- Organic Insulating Materials (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK448579A DK448579A (da) | 1978-03-10 | 1979-10-24 | Anvendelse af et glaskeramisk materiale som elektrisk isolator |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7802801A SE7802801L (sv) | 1978-03-10 | 1978-03-10 | Elektrisk isolator |
| SE7802801 | 1978-03-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1979000737A1 true WO1979000737A1 (en) | 1979-10-04 |
Family
ID=20334282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/SE1979/000050 WO1979000737A1 (en) | 1978-03-10 | 1979-03-09 | Utilization of a glass-ceramic material as electrical insulator |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0012772A1 (enrdf_load_stackoverflow) |
| JP (1) | JPS55500150A (enrdf_load_stackoverflow) |
| DK (1) | DK448579A (enrdf_load_stackoverflow) |
| SE (1) | SE7802801L (enrdf_load_stackoverflow) |
| WO (1) | WO1979000737A1 (enrdf_load_stackoverflow) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0087884A1 (en) * | 1982-02-17 | 1983-09-07 | RAYCHEM CORPORATION (a California corporation) | PTC circuit protection device |
| US4542365A (en) * | 1982-02-17 | 1985-09-17 | Raychem Corporation | PTC Circuit protection device |
| US4549161A (en) * | 1982-02-17 | 1985-10-22 | Raychem Corporation | PTC Circuit protection device |
| US4550301A (en) * | 1982-02-17 | 1985-10-29 | Raychem Corporation | PTC Circuit protection device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106517798B (zh) * | 2016-10-21 | 2019-05-17 | 北京科技大学 | 利用中、低钛型高炉渣制备微晶玻璃的方法 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB140874A (en) * | 1919-02-12 | 1920-04-08 | Thomas Frederick Hoare | Improvements in or relating to the utilization of slag as a building and other constructional material |
| FR1447653A (fr) * | 1965-09-22 | 1966-07-29 | Zd | Verre à base de scories métallurgiques et procédé d'obtention de pièces en verre cristallisé à partir de celui-ci |
| DE1496060A1 (de) * | 1962-10-30 | 1969-08-28 | British Iron Steel Research | Aus metallurgischer Schlacke hergestelltes Material und Verfahren zu seiner Herstellung |
| SE337891B (enrdf_load_stackoverflow) * | 1959-09-23 | 1971-08-23 | Gen Electric | |
| DE1696070A1 (de) * | 1968-02-07 | 1971-11-04 | Sawod Awtosteklo | Glas und glaskristallines Material |
| SE346980B (enrdf_load_stackoverflow) * | 1959-09-23 | 1972-07-24 | Gen Electric |
-
1978
- 1978-03-10 SE SE7802801A patent/SE7802801L/xx unknown
-
1979
- 1979-03-09 WO PCT/SE1979/000050 patent/WO1979000737A1/en unknown
- 1979-03-09 JP JP50048079A patent/JPS55500150A/ja active Pending
- 1979-10-09 EP EP79901151A patent/EP0012772A1/en not_active Withdrawn
- 1979-10-24 DK DK448579A patent/DK448579A/da unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB140874A (en) * | 1919-02-12 | 1920-04-08 | Thomas Frederick Hoare | Improvements in or relating to the utilization of slag as a building and other constructional material |
| SE337891B (enrdf_load_stackoverflow) * | 1959-09-23 | 1971-08-23 | Gen Electric | |
| SE346980B (enrdf_load_stackoverflow) * | 1959-09-23 | 1972-07-24 | Gen Electric | |
| DE1496060A1 (de) * | 1962-10-30 | 1969-08-28 | British Iron Steel Research | Aus metallurgischer Schlacke hergestelltes Material und Verfahren zu seiner Herstellung |
| FR1447653A (fr) * | 1965-09-22 | 1966-07-29 | Zd | Verre à base de scories métallurgiques et procédé d'obtention de pièces en verre cristallisé à partir de celui-ci |
| DE1696070A1 (de) * | 1968-02-07 | 1971-11-04 | Sawod Awtosteklo | Glas und glaskristallines Material |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0087884A1 (en) * | 1982-02-17 | 1983-09-07 | RAYCHEM CORPORATION (a California corporation) | PTC circuit protection device |
| US4481498A (en) * | 1982-02-17 | 1984-11-06 | Raychem Corporation | PTC Circuit protection device |
| US4542365A (en) * | 1982-02-17 | 1985-09-17 | Raychem Corporation | PTC Circuit protection device |
| US4549161A (en) * | 1982-02-17 | 1985-10-22 | Raychem Corporation | PTC Circuit protection device |
| US4550301A (en) * | 1982-02-17 | 1985-10-29 | Raychem Corporation | PTC Circuit protection device |
Also Published As
| Publication number | Publication date |
|---|---|
| DK448579A (da) | 1979-10-24 |
| SE7802801L (sv) | 1979-09-11 |
| EP0012772A1 (en) | 1980-07-09 |
| JPS55500150A (enrdf_load_stackoverflow) | 1980-03-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AK | Designated states |
Designated state(s): BR CH DE DK GB JP SU US |
|
| AL | Designated countries for regional patents |
Designated state(s): FR |