DE952514C - Process for the manufacture of objects from crystalline solidifying silicate melts - Google Patents

Process for the manufacture of objects from crystalline solidifying silicate melts

Info

Publication number
DE952514C
DE952514C DES19042A DES0019042A DE952514C DE 952514 C DE952514 C DE 952514C DE S19042 A DES19042 A DE S19042A DE S0019042 A DES0019042 A DE S0019042A DE 952514 C DE952514 C DE 952514C
Authority
DE
Germany
Prior art keywords
objects
manufacture
temperature
melts
silicate melts
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
Application number
DES19042A
Other languages
German (de)
Inventor
Dr Phil Hubert Wagner
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.)
SUEDDEUTSCHE BASALTWERKE
Original Assignee
SUEDDEUTSCHE BASALTWERKE
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 SUEDDEUTSCHE BASALTWERKE filed Critical SUEDDEUTSCHE BASALTWERKE
Priority to DES19042A priority Critical patent/DE952514C/en
Application granted granted Critical
Publication of DE952514C publication Critical patent/DE952514C/en
Expired legal-status Critical Current

Links

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
    • C03C10/16—Halogen containing crystalline phase

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)

Description

Verfahren zum Herstellen von Gegenständen aus kristallin erstarrenden Silikatschmelzen Zusatz zum Patent 927 978 Bei dem Verfahren nach Patent 927 978 handelt es sich unter anderem um die Verarbeitung von Schmelzen, die als Hauptbestandteile S'02, Ca F2 und Ca0 enthalten und mindestens annähernd eutektische Zusammensetzung aufweisen. Durch Formguß werden aus einer solchen Schmelze Formstücke erhalten, die bei Unterschreitung der Erstarrungstemperatur (eutektischen Temperatur) kristallin erstarren und keine oder höchstens ro bis 2o Volumprozent Glasphase aufweisen.Process for the production of objects from crystalline solidifying silicate melts Addition to patent 927 978 The process according to patent 927 978 involves, among other things, the processing of melts which contain S'02, Ca F2 and Ca0 as main components and have at least approximately eutectic composition . By casting, molded pieces are obtained from such a melt which solidify in crystalline form when the solidification temperature (eutectic temperature) is not reached and have no or at most about 20 percent by volume glass phase.

Diese Formstücke sind, wie sich gezeigt hat, sehr empfindlich gegen Abkühlung, so daß die bei der Fabrikation von Gebrauchsgläsern übliche Maßnahme einer verzögerten Abkühlung, die bei einer Temperatur von etwa 6oo° C beginnt und bei Raumtemperatur endet, in der Regel nicht ausreicht, um risse- und spannungsfreie Gegenstände zu erhalten.As has been shown, these fittings are very sensitive to Cooling, so that the usual measure in the manufacture of glasses for use a delayed cooling that begins at a temperature of about 600 ° C and ends at room temperature, usually not sufficient to be crack-free and stress-free Obtain items.

Zu einwandfreien Erzeugnissen gelangt man gemäß der Erfindung dadurch, daß die genannten Formstücke einer verzögerten Abkühlung unterworfen werden, die bei einer Temperatur beginnt, die nicht zu tief unter der Erstarrungstemperatur (eutektischen Temperatur) der Schmelze liegt und mindestens 7oo bis goo° C beträgt.According to the invention, perfect products are obtained by that the said fittings are subjected to delayed cooling, the begins at a temperature which is not too low below the solidification temperature (eutectic temperature) of the melt and is at least 7oo to goo ° C.

Bei Verwendung einer Schmelze, die 3o bis 34°/a S i O2, 28 bis 320/0 Ca O, 36 bis 400/0, Ca F2 enthält, werden beispielsweise die unmittelbar nach dem Erstarren entformten Gußstücke so schnell wie möglich einem Kühlofen. zugeführt, dessen Temperatur am Eingang 9.5o° C beträgt. -Die nach dem Verfahren gemäß der Erfindung erhaltenen Gegenstände zeichnen sich durch besonders hohe Verschleißfestigkeit aus.When using a melt that is 3o to 34 ° / a S i O2, 28 to 320/0 Ca 0.36 to 400/0, Ca F2 contains, for example, the immediately after Freeze demoulded castings as quickly as possible in a cooling furnace. supplied, its temperature at the input is 9.5o ° C. -The obtained by the method according to the invention Objects are characterized by a particularly high level of wear resistance.

Claims (1)

PATENTANSPRUCH: Verfahren zum Herstellen von Gegenständen .aus Schmelzen" die als Hauptbestandteile Si 02, Ca F2 und Ca 0 enthalten und mindestens annähernd eutektische Zusammensetzung aufweisen, durch Formguß nach Patent 9a7 978, dadurch gekennzeichnet, daß die Formstücke einer verzögerten Abkühlung unterworfen werden, die bei; einer Temperatur von mindestens 7oo bis. 9oo° C beginnt. In Betracht gezogene Druckschriften: Deutsche Patentschriften Nr. 287 394 263 445, 332 578. 410 351, 430 387, 458 5o9, 630 898; Technische Rundschau v. 26. 5. r92o (Berliner Tageblatt) ; »Hütte«, I. Bd,. 19.z5.PATENT CLAIM: Process for the production of objects .from melts "which contain Si 02, Ca F2 and Ca 0 as main constituents and have at least approximately eutectic composition, by molding according to Patent 9a7 978, characterized in that the shaped pieces are subjected to delayed cooling, the at; a temperature of at least 700 to 900 ° C. Considered publications: German Patent Nos. 287 394 263 445, 332 578, 410 351, 430 387, 458 509, 630 898; Technische Rundschau of May 26th . r92o (Berliner Tageblatt); "Hut", Volume I, 19.z5.
DES19042A 1950-09-09 1950-09-09 Process for the manufacture of objects from crystalline solidifying silicate melts Expired DE952514C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES19042A DE952514C (en) 1950-09-09 1950-09-09 Process for the manufacture of objects from crystalline solidifying silicate melts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES19042A DE952514C (en) 1950-09-09 1950-09-09 Process for the manufacture of objects from crystalline solidifying silicate melts

Publications (1)

Publication Number Publication Date
DE952514C true DE952514C (en) 1956-11-15

Family

ID=7475767

Family Applications (1)

Application Number Title Priority Date Filing Date
DES19042A Expired DE952514C (en) 1950-09-09 1950-09-09 Process for the manufacture of objects from crystalline solidifying silicate melts

Country Status (1)

Country Link
DE (1) DE952514C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4623435A (en) * 1983-09-01 1986-11-18 Columbia Gas System Service Corporation Backfill for magnesium anodes

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE287394C (en) * 1913-04-24
DE263445C (en) * 1900-01-01
DE332578C (en) * 1918-09-20 1921-02-08 Harry Fehringer Process for the production of a slightly liquid, porcelain-like, ceramic mass
DE410351C (en) * 1923-01-17 1925-03-05 Heinrich Becker Process for the production of a porcelain-like mass
DE430387C (en) * 1925-04-01 1926-06-15 Heinrich Becker Sen Process for the production of an easily meltable and pourable, porcelain-like mass
DE458509C (en) * 1926-11-27 1928-04-12 Heinrich Becker Sen Process for the production of a flowable deformable ceramic melt product
DE630898C (en) * 1933-05-31 1936-06-08 Bernhard Becker Process for the production of enamel masses from raw waste or other waste materials containing silicate

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE263445C (en) * 1900-01-01
DE287394C (en) * 1913-04-24
DE332578C (en) * 1918-09-20 1921-02-08 Harry Fehringer Process for the production of a slightly liquid, porcelain-like, ceramic mass
DE410351C (en) * 1923-01-17 1925-03-05 Heinrich Becker Process for the production of a porcelain-like mass
DE430387C (en) * 1925-04-01 1926-06-15 Heinrich Becker Sen Process for the production of an easily meltable and pourable, porcelain-like mass
DE458509C (en) * 1926-11-27 1928-04-12 Heinrich Becker Sen Process for the production of a flowable deformable ceramic melt product
DE630898C (en) * 1933-05-31 1936-06-08 Bernhard Becker Process for the production of enamel masses from raw waste or other waste materials containing silicate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4623435A (en) * 1983-09-01 1986-11-18 Columbia Gas System Service Corporation Backfill for magnesium anodes

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