US3006984A - Current inlet member - Google Patents

Current inlet member Download PDF

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Publication number
US3006984A
US3006984A US852071A US85207159A US3006984A US 3006984 A US3006984 A US 3006984A US 852071 A US852071 A US 852071A US 85207159 A US85207159 A US 85207159A US 3006984 A US3006984 A US 3006984A
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US
United States
Prior art keywords
weight
glass
inlet member
conductor
glasslike
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 - Lifetime
Application number
US852071A
Inventor
Bol Arie
Tacken Peter Jan Martin
Cornelis Jacobus Marie Va Laan
Baas Gerardus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NORTH AMERICAN PHILLIPS COMPAN
NORTH AMERICAN PHILLIPS COMPANY Inc
Original Assignee
NORTH AMERICAN PHILLIPS COMPAN
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by NORTH AMERICAN PHILLIPS COMPAN filed Critical NORTH AMERICAN PHILLIPS COMPAN
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Publication of US3006984A publication Critical patent/US3006984A/en
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Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/26—Lead-in insulators; Lead-through insulators
    • H01B17/30—Sealing
    • H01B17/303—Sealing of leads to lead-through insulators
    • H01B17/305—Sealing of leads to lead-through insulators by embedding in glass or ceramic material
    • 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
    • C03C29/00—Joining metals with the aid 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
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/078—Glass compositions containing silica with 40% to 90% silica, by weight containing an oxide of a divalent metal, e.g. an oxide of zinc
    • 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
    • H01B3/085—Particles bound with 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
    • H01B3/08—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
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/32—Seals for leading-in conductors
    • H01J5/40—End-disc seals, e.g. flat header
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0033—Vacuum connection techniques applicable to discharge tubes and lamps
    • H01J2893/0034—Lamp bases
    • H01J2893/0035—Lamp bases shaped as flat plates, in particular metallic

Definitions

  • the invention relates to a current leading-in member comprising one or more conductors, which are secured in a gastight manner in a sintered, glasslike body, which is surrounded by a metal ring, of which the metal has a higher expansion coefiicient than the glasslike body.
  • leading-in members are capable of withstanding heavy mechanical and thermal thrusts.
  • inlet members can be manufactured in a large size, to which end cheap metals such as steel can be employed, if the expansion coefiicient of the glasslike body matches more closely that of the metal.
  • This may be achieved by manufacturing the body of about 10% by weight of glass powder and 60% by weight of magnesia powder.
  • the magnesia particles should in this case not be so fine that the glass can no longer penetrate into the space between them.
  • the smallest size is about a few tenths of a millimetre.
  • the temperature during sintering of the mass must not be so high that the ceramic particles dissolve in the glass, since then the expansion coeflicient would be afiected adversely.
  • the inlet members have greater strength according as the melting temperature of the glasslike mass is higher.
  • the choice of this material is restricted by the fact that the diiference between the expansion coefiicients of this material and of the metal must lie within certain limits.
  • the expansion COCfllClBDt of the metal of the external ring must, as a rule, exceed that of the glasslike body by about 25%.
  • reference numeral 1 designates the current supply conductor, 2 the glasslike material and 3 the external metal pressure ring. Instead of one supply conductor use may be made of any number of conductors.
  • the aforesaid glass powder has added to it 5% by weight of A1 0 of which the particle size amounts to In.
  • the sintering process may take place at 800 C. and the melting process at 1050 C. for the aforesaid periods. Cooling is also performed at a rate of 0.5 to 1 C. per second.
  • the expansion coeificients of the glass masses are substantially the same, but that the inlet member according to the invention has greater strength to mechanical and thermal shocks than the known members.
  • a current lead-in member comprising at least one conductor, a metal ring surrounding and spaced from the conductor, and a glass-like insulating material filling the space between the conductor and the ring, said glasslike material consisting essentially of a mixture of glass and between about 0.2 and 5% by weight of particles of ceramic material having a particle size smaller than 5 w 2.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Glass Compositions (AREA)

Description

Oct. 31, 1961 A. BOL ETAL 3,006,984 CURRENT INLET MEMBER Filed Nov. 10, 1959 INVENTOR 0.J.M. VANDE LAAN P.J.M. TACKEN 6. E443 BY A. 80L
AGENT l J i T The invention relates to a current leading-in member comprising one or more conductors, which are secured in a gastight manner in a sintered, glasslike body, which is surrounded by a metal ring, of which the metal has a higher expansion coefiicient than the glasslike body.
It is known that such leading-in members are capable of withstanding heavy mechanical and thermal thrusts.
It is also known that such inlet members can be manufactured in a large size, to which end cheap metals such as steel can be employed, if the expansion coefiicient of the glasslike body matches more closely that of the metal. This may be achieved by manufacturing the body of about 10% by weight of glass powder and 60% by weight of magnesia powder. The magnesia particles should in this case not be so fine that the glass can no longer penetrate into the space between them. The smallest size is about a few tenths of a millimetre. The temperature during sintering of the mass must not be so high that the ceramic particles dissolve in the glass, since then the expansion coeflicient would be afiected adversely.
It is furthermore known for use at very high frequencies and voltages to manufacture the glass mass from a mixture of glass powder and mica.
It has appeared, however, that in certain cases, in the event of great thermal or mechanical shocks, the known bodies may exhibit cracks in the glass-like mass.
From many experiments it has noW appeared that the mechanical and thermal strength of such current lead-in members, in which the sintered, glasslike mass consists of a mixture of glass and ceramic powder, can be materially improved, if the size of the ceramic particles is less than 1., whilst the quantity of ceramic material lies between 0.2 and 5% by weight. Use is preferably made of ceramic particles of la.
It has been found that the inlet members have greater strength according as the melting temperature of the glasslike mass is higher. The choice of this material is restricted by the fact that the diiference between the expansion coefiicients of this material and of the metal must lie within certain limits. The expansion COCfllClBDt of the metal of the external ring must, as a rule, exceed that of the glasslike body by about 25%.
It appears that the influence of ceramic particles such as A1 0 (alundum), phosterite (2MgO.SiO or titanic oxide (TiO) on the melting temperature is reduced according to the particle size increases, provided the temperature is not raised to an extent such that the particles dissolve in the glass, since the expansion coeflicient would then be changed to an inadmissible extent.
The invention will now be described more fully with reference to a drawing and one embodiment.
Referring to the drawing, of which the figure shows a definite embodiment of a current inlet member, reference numeral 1 designates the current supply conductor, 2 the glasslike material and 3 the external metal pressure ring. Instead of one supply conductor use may be made of any number of conductors.
3,006,984 Patented Oct. 31, 1961 In a known embodiment powder of a species of hard glass consisting of:
69.5% by weight of SiO 0.6% by weight of Li O, 7.2% by weight of Na O, 8.6% by weight of K 0, 10.8% by weight of BaO, 2.9% by weight of Sb O 0.2% by Weight of NiO, 0.1% by weight of Cr O 0.1% by weight of C00,
is moulded in a suitable shape with a binder of a synthetic resin solution, after which sintering is carried out at 700 C. for about 10 minutes, and the material is passed around the metal current conductors in the metal ring, the material being then melted at 950 C. for 5 minutes, after which cooling is performed at a rate of 0.5 to 1 C. per second.
In the embodiment according to the invention the aforesaid glass powder has added to it 5% by weight of A1 0 of which the particle size amounts to In. The sintering process may take place at 800 C. and the melting process at 1050 C. for the aforesaid periods. Cooling is also performed at a rate of 0.5 to 1 C. per second.
It is found that the expansion coeificients of the glass masses are substantially the same, but that the inlet member according to the invention has greater strength to mechanical and thermal shocks than the known members.
What is claimed is:
1. A current lead-in member comprising at least one conductor, a metal ring surrounding and spaced from the conductor, and a glass-like insulating material filling the space between the conductor and the ring, said glasslike material consisting essentially of a mixture of glass and between about 0.2 and 5% by weight of particles of ceramic material having a particle size smaller than 5 w 2. A current lead-in member as claimed in claim 1 in which the particles of ceramic material have a particle size of about 1 ,u..
3. A lead-in conductor as claimed in claim 1 in which the ceramic material is A1 0 4. A lead-in conductor as claimed in claim 1 in which the ceramic material is 2MgO.SiO
5. A lead-in conductor as claimed in claim 1 in which the ceramic material is TiO.
6. A lead-in conductor as claimed in claim 1 in which the glass has the composition:
69.5% by weight of SiO 0.6% by weight of Li O 7.2% by weight of Na O 8.6% by weight of K 0 10.8% by weight of BaO 2.9% by weight of Sb O 0.2% by weight of NiO 0.1% by weight of Cr O 0.1% by weight of C00.
References Cited in the file of this patent UNITED STATES PATENTS 2,408,468 Lyon Oct. 1, 1946 2,513,958 Omley July 4, 1950 2,669,808 Duncan Feb. 23, 1954 FOREIGN PATENTS 162,555 Australia Apr. 21, 1955
US852071A 1958-11-29 1959-11-10 Current inlet member Expired - Lifetime US3006984A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL3006984X 1958-11-29

Publications (1)

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US3006984A true US3006984A (en) 1961-10-31

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Family Applications (1)

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GB (1) GB920607A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3189677A (en) * 1961-07-17 1965-06-15 Scully Anthony Corp Aluminum electrical enclosures having a titania lead glass seal containing a ceramicmatrix
US3213337A (en) * 1962-10-02 1965-10-19 Whittaker Corp Composite ceramic body and method of forming the same
US3220095A (en) * 1960-12-15 1965-11-30 Corning Glass Works Method for forming enclosures for semiconductor devices
US3225132A (en) * 1960-04-14 1965-12-21 Philips Corp Devitrified glass-to-metal compression seal
US3374076A (en) * 1964-09-28 1968-03-19 Corning Glass Works Method for producing hermetic glass to metal seals
US3389215A (en) * 1966-03-04 1968-06-18 Gen Motors Corp High temperature alumina-to-niobium article
US3436109A (en) * 1965-12-15 1969-04-01 Corning Glass Works Stressed hermetic seal and method of making said seal
US4531791A (en) * 1982-02-24 1985-07-30 Sintra-Alcatel Feed-through for hybrid circuit box and matching connectors
US4556613A (en) * 1979-07-03 1985-12-03 Duracell Inc. Resistant glass in glass-metal seal and cell terminal structure for lithium electrochemical cells
WO2012167921A1 (en) * 2011-06-10 2012-12-13 Schott Ag Feedthrough
EP3579296A1 (en) * 2011-02-18 2019-12-11 Schott AG Feedthrough

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4716082A (en) * 1986-10-28 1987-12-29 Isotronics, Inc. Duplex glass preforms for hermetic glass-to-metal sealing

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2408468A (en) * 1942-12-03 1946-10-01 Gen Electric Glass composition
US2513958A (en) * 1949-08-17 1950-07-04 Gen Electric Electric insulating bushing and glass therefor
US2669808A (en) * 1951-09-15 1954-02-23 Pittsburgh Plate Glass Co Glass composition

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2408468A (en) * 1942-12-03 1946-10-01 Gen Electric Glass composition
US2513958A (en) * 1949-08-17 1950-07-04 Gen Electric Electric insulating bushing and glass therefor
US2669808A (en) * 1951-09-15 1954-02-23 Pittsburgh Plate Glass Co Glass composition

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3225132A (en) * 1960-04-14 1965-12-21 Philips Corp Devitrified glass-to-metal compression seal
US3220095A (en) * 1960-12-15 1965-11-30 Corning Glass Works Method for forming enclosures for semiconductor devices
US3189677A (en) * 1961-07-17 1965-06-15 Scully Anthony Corp Aluminum electrical enclosures having a titania lead glass seal containing a ceramicmatrix
US3213337A (en) * 1962-10-02 1965-10-19 Whittaker Corp Composite ceramic body and method of forming the same
US3374076A (en) * 1964-09-28 1968-03-19 Corning Glass Works Method for producing hermetic glass to metal seals
US3436109A (en) * 1965-12-15 1969-04-01 Corning Glass Works Stressed hermetic seal and method of making said seal
US3389215A (en) * 1966-03-04 1968-06-18 Gen Motors Corp High temperature alumina-to-niobium article
US4556613A (en) * 1979-07-03 1985-12-03 Duracell Inc. Resistant glass in glass-metal seal and cell terminal structure for lithium electrochemical cells
US4531791A (en) * 1982-02-24 1985-07-30 Sintra-Alcatel Feed-through for hybrid circuit box and matching connectors
EP3579296A1 (en) * 2011-02-18 2019-12-11 Schott AG Feedthrough
WO2012167921A1 (en) * 2011-06-10 2012-12-13 Schott Ag Feedthrough
CN103620813A (en) * 2011-06-10 2014-03-05 肖特公开股份有限公司 Feedthrough
US9614199B2 (en) 2011-06-10 2017-04-04 Schott Ag Feedthrough
CN103620813B (en) * 2011-06-10 2017-11-03 肖特公开股份有限公司 Feedthrough

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