AT143624B - Process for the production of shaped pieces which contain waste or powder of mica mixed with glass flux. - Google Patents

Process for the production of shaped pieces which contain waste or powder of mica mixed with glass flux.

Info

Publication number
AT143624B
AT143624B AT143624DA AT143624B AT 143624 B AT143624 B AT 143624B AT 143624D A AT143624D A AT 143624DA AT 143624 B AT143624 B AT 143624B
Authority
AT
Austria
Prior art keywords
mica
powder
production
shaped pieces
glass
Prior art date
Application number
Other languages
German (de)
Original Assignee
Saint Gobain
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.)
Filing date
Publication date
Application filed by Saint Gobain filed Critical Saint Gobain
Application granted granted Critical
Publication of AT143624B publication Critical patent/AT143624B/en

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  • Glass Compositions (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Description

  

   <Desc/Clms Page number 1> 
 
 EMI1.1 
 



   Es ist bekannt, hitzebeständige und elektrisch isolierende Folien und Platten herzustellen, indem man Glimmerstaub oder-abfall mittels keramischer Massen, welche zwischen 600 und   9000 schmelzen,   bindet. Es ist ferner bekannt, glasartige Formstücke durch Zusammenschmelzen von Glimmer mit leichtschmelzenden Glasflüssen herzustellen.

   Die auflösende Wirkung dieser   Glasflüsse   wirkt sieh jedoch lediglich auf Kaliglimmer, wie Muscovit, aus, da die Magnesiaglimmer, wie Phlogopit und Biotit, bei Temperaturen, bei denen die Kaliglimmer sich im Glas vollständig auflösen und verschwinden, durch Gläser und Glasflüsse praktisch nicht angegriffen werden. 
 EMI1.2 
 durchsichtigkeit und ihrer unregelmässigen Spaltbarkeit recht beschränkt ist, zeigen in Mischung mit den verschiedenen Glassorten nicht nur grössere Widerstandsfähigkeit gegen den Angriff geschmolzenen Glases, sondern auch eine bemerkenswerte Beständigkeit bei Temperaturen bis zu 900 , während der Muscovit bei diesen Temperaturen sein gesamtes Konstitutionswasser verliert. Infolgedessen bewahren Mischungen von Magnesiaglimmer mit geschmolzenem Glas vollkommen ihre mechanischen und elektrischen Eigenschaften. 



   Die Erfindung macht sich diese Vorteile zunutze. Sie besteht darin, mit glasartigen Schmelzflüssen Abfälle oder Pulver von Mangesiaglimmer zu mischen, die, wie Phlogopit oder Biotit, von diesen Schmelzflüssen praktisch nicht angegriffen werden, diese Mischung auf eine zur Erweichung der Schmelzflüsse hinreichende Temperatur zu erhitzen und die derart erweichte Mischung in metallene, auf zirka   400  erhitzte   Formen zu pressen. 
 EMI1.3 
 plizierter Gestalt, die immer gleichmässig ausfallen und die eine viel grössere mechanische Festigkeit und eine bedeutend höhere Hitzebeständigkeit aufweisen als die bisher mittels Glimmerpulver oder - abfall erzeugten Produkte. 
 EMI1.4 
 
Glasflüsse zuzumischen, die gleichzeitig Kieselsäure, Kryolith, Borsäure und Bleisalze enthalten.

   Diese Mischungen ergeben Erzeugnisse von hohem dielektrischem Widerstand, welche gegenüber Wasser und Atmosphärilien sehr beständig sind. 



   Man kann z. B. 10 Teile Kryolith mit der gleichen Menge Kieselsäure vermengen und 30 Teile Minium, 15 Teile Feldspat und 35 Teile Borsäure zusetzen, wodurch man eine Masse erhält, die bei   4200 erweicht.   



   Setzt man diesem Gemenge 150 Teile Magnesiaglimmer zu, erhitzt dann, presst und lässt erkalten, so erhält man ein Erzeugnis, das nach 72stündigem Liegen im Wasser Spannungen in der Grössenordnung von 38.000 Volt auf einem Querschnitt von 72 mm2 und einem Abstand von 90   mm,   gemessen zwischen den Befestigungsringen, widersteht. 



   PATENT-ANSPRÜCHE :
1. Verfahren zur Herstellung von Formstücken, welche Abfälle oder Pulver von Glimmer, gemischt mit Glasflüssen, enthalten, dadurch gekennzeichnet, dass man Magnesiaglimmer, wie Phlogopit und Biotit, verwendet, die von den Glassätzen praktisch nicht angegriffen werden, dass man das Gemenge genügend hoch erhitzt, um den Glasfluss   zumErweichen   zu bringen, und dass man schliesslich das erweichte Gemenge in auf ungefähr   4000 C erwärmten   Formen presst. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 
 EMI1.1
 



   It is known to produce heat-resistant and electrically insulating foils and plates by binding mica dust or waste by means of ceramic masses which melt between 600 and 9000. It is also known to produce glass-like shaped pieces by melting together mica with easily melting glass fluxes.

   The dissolving effect of these glass flows only affects potash mica, such as muscovite, since magnesia mica, such as phlogopite and biotite, are practically not attacked by glasses and glass flows at temperatures at which the potash mica dissolve completely and disappear in the glass.
 EMI1.2
 transparency and its irregular cleavage is quite limited, when mixed with the various types of glass, they show not only greater resistance to attack by molten glass, but also a remarkable resistance at temperatures of up to 900, while muscovite loses all of its constitutional water at these temperatures. As a result, mixtures of magnesia mica with molten glass fully retain their mechanical and electrical properties.



   The invention makes use of these advantages. It consists of mixing waste or powder of manganese mica with vitreous melt fluxes, which, like phlogopite or biotite, are practically not attacked by these melt fluxes, heating this mixture to a temperature sufficient to soften the melt fluxes and converting the softened mixture into metallic, to press on around 400 heated molds.
 EMI1.3
 Plied shape, which always turn out to be uniform and which have a much greater mechanical strength and a significantly higher heat resistance than the products previously produced using mica powder or waste.
 EMI1.4
 
To mix in glass fluxes which contain silica, cryolite, boric acid and lead salts at the same time.

   These mixtures result in products of high dielectric resistance which are very resistant to water and atmospheric agents.



   You can z. B. Mix 10 parts of cryolite with the same amount of silica and add 30 parts of minium, 15 parts of feldspar and 35 parts of boric acid, giving a mass that softens at 4200.



   If 150 parts of magnesia mica are added to this mixture, then heated, pressed and allowed to cool, a product is obtained which, after 72 hours in the water, measured voltages of the order of 38,000 volts on a cross section of 72 mm2 and a distance of 90 mm between the fastening rings.



   PATENT CLAIMS:
1. A process for the production of shaped pieces which contain waste or powder of mica mixed with glass fluxes, characterized in that magnesia mica, such as phlogopite and biotite, is used, which are practically not attacked by the glass sets, that the mixture is sufficiently high heated in order to soften the glass flow, and that finally the softened mixture is pressed into molds heated to about 4000 C.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

2. Ausführungsform des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, dass man mit den Magnesiaglimmersorten Kieselsäure, Kryolith, Borsäure und Bleisalze vermengt, wodurch man Erzeugnisse mit hoher Dielektrizitätskonstante erhält, die gegenüber Wasser und Atmosphärilien sehr widerstandsfähig sind. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. 2. Embodiment of the method according to claim 1, characterized in that silica, cryolite, boric acid and lead salts are mixed with the magnesia mica, whereby products with a high dielectric constant are obtained which are very resistant to water and atmospheric agents. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT143624D 1933-04-11 1934-02-24 Process for the production of shaped pieces which contain waste or powder of mica mixed with glass flux. AT143624B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR143624X 1933-04-11

Publications (1)

Publication Number Publication Date
AT143624B true AT143624B (en) 1935-11-25

Family

ID=8874923

Family Applications (1)

Application Number Title Priority Date Filing Date
AT143624D AT143624B (en) 1933-04-11 1934-02-24 Process for the production of shaped pieces which contain waste or powder of mica mixed with glass flux.

Country Status (1)

Country Link
AT (1) AT143624B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE765031C (en) * 1938-07-09 1954-05-10 Aeg Electrical insulating material made of mica and glass
DE1225092B (en) * 1961-03-16 1966-09-15 Mycalex & T I M Ltd Process for the production of a mica-containing insulating material
DE1241508B (en) * 1954-04-06 1967-06-01 Mycalex And T I M Ltd Process for the production of electrical insulating material

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE765031C (en) * 1938-07-09 1954-05-10 Aeg Electrical insulating material made of mica and glass
DE1241508B (en) * 1954-04-06 1967-06-01 Mycalex And T I M Ltd Process for the production of electrical insulating material
DE1225092B (en) * 1961-03-16 1966-09-15 Mycalex & T I M Ltd Process for the production of a mica-containing insulating material

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