DE2629297A1 - Vitrified ceramic dielectric prodn. with high dielectric constant - from calcium, magnesium, barium and lanthanum titanates - Google Patents

Vitrified ceramic dielectric prodn. with high dielectric constant - from calcium, magnesium, barium and lanthanum titanates

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Publication number
DE2629297A1
DE2629297A1 DE19762629297 DE2629297A DE2629297A1 DE 2629297 A1 DE2629297 A1 DE 2629297A1 DE 19762629297 DE19762629297 DE 19762629297 DE 2629297 A DE2629297 A DE 2629297A DE 2629297 A1 DE2629297 A1 DE 2629297A1
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Prior art keywords
titanate
mixture
lanthanum
bismuth
dense
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DE19762629297
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German (de)
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Johannes Dipl Chem Just
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Licentia Patent Verwaltungs GmbH
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Licentia Patent Verwaltungs GmbH
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Priority to DE2238201A priority Critical patent/DE2238201C3/en
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Priority to DE19762629297 priority patent/DE2629297A1/en
Publication of DE2629297A1 publication Critical patent/DE2629297A1/en
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
    • C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
    • C04B35/465—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
    • C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
    • C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
    • C04B35/465—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates
    • C04B35/47—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates based on strontium titanates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
    • C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
    • C04B35/475—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on bismuth titanates
    • 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
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/002—Details
    • H01G4/018—Dielectrics
    • H01G4/06—Solid dielectrics
    • H01G4/08—Inorganic dielectrics
    • H01G4/12—Ceramic dielectrics
    • H01G4/1209—Ceramic dielectrics characterised by the ceramic dielectric material
    • H01G4/1218—Ceramic dielectrics characterised by the ceramic dielectric material based on titanium oxides or titanates
    • H01G4/1227—Ceramic dielectrics characterised by the ceramic dielectric material based on titanium oxides or titanates based on alkaline earth titanates

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Inorganic Insulating Materials (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Ceramic Capacitors (AREA)

Abstract

The prodn. of a vitrified ceramic dielectric ontg. Ca, Mg and Bi titanates as described in the parent patent, is effected using a mixt. contg. or yielding 1-85 esp. 72 or 65 wt.% Ca titanate; 0.5-85 esp. 5 or 8% Mg titanate; 1-60% esp. 2 or 18 wt.% Bi titanate and 0.5-50 esp. 3 or 9 wt.% La titanate. The dielectric constant of the prod. is 20-50% higher than usual and the material gives more reliable capacitors. In an example, for compsns. contg. 65.6 (62.8)% CaTiO3, 8.3 (20.6)% Mg2TiO4, 17.8 (17.6)% Bi2(TiO3)3 and 8.3 (0)% La2(TiO3)3, fired at 1270 (1260) degrees C, the dielectric constant was 122(102), loss tangent 1.7 (1.1) x 10-4, insulation resistance 50 (14) x 106 Mohm, temp. coefft. -840 (-1070) x 10-6/degrees C and breakdown voltage 23 (18) kV/mm.

Description

Verfahren zur Herstellung eines keramischen DielektrikumsProcess for the production of a ceramic dielectric

(Zusatz zu Patent ..... Patentanmeldung P 22 38 201.0).(Addition to patent ..... patent application P 22 38 201.0).

Die Erfindung betrifft ein Verfahren zur Herstellung eines Kalziumtitanat, Magnesiumtitanat und Wismuttitanat enthaltenden, dichtgebrannten keramischen Dielektrikums.The invention relates to a method for producing a calcium titanate, Dense fired ceramic dielectric containing magnesium titanate and bismuth titanate.

Nach Patent ,,.... (Patentanmeldung P 22 38 201.0) ist bereits ein Verfahren bekannt, elektrische Kondensatoren mit einem keramischen Dielektrikum herzustellen, das eine Spannungsfestigkeit von mindestens 6 kV-/mm bei Temperaturen von bis zu 150°C aufweist. Dieses keramische Dielektrikum besteht aus einem Gemisch von 1 bis 85 Gewichtsprozenten Kalziumtitanat, 15 bis 90 Gewichtsprozenten Magnesiumtitanat und 1 bis 20 Gewichtsprozenten Wismuttitanat oder von chemischen Verbindungen, die während des Dichtbrennens die vorgenannten Stoffe ergeben. Es besteht aber das Bedürfnis, die Kapazitäten derartiger Kondensatoren weiter zu erhöhen.According to patent ,, .... (patent application P 22 38 201.0) is already a Method known, electrical capacitors with a ceramic dielectric establish a dielectric strength of at least 6 kV / mm at temperatures of up to 150 ° C. This ceramic dielectric consists of a mixture from 1 to 85 percent by weight calcium titanate, 15 to 90 percent by weight magnesium titanate and 1 to 20 weight percent bismuth titanate or of chemical compounds that the aforementioned substances result during the tight burning process. But there is a need to further increase the capacities of such capacitors.

Der Erfindung liegt die Aufgabe zugrunde, ein keramisches Dielektrikum mit einer höheren als bisher bekannten Dielektrizitätskonstanten für elektrische Kondensatoren der oben erwähnten Gattung mit hoher Zuverlässigkeit zu entwickeln.The invention is based on the object of a ceramic dielectric with a higher than previously known dielectric constant for electrical To develop capacitors of the type mentioned above with high reliability.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß ein Gemisch von 1 bis 85 Gewichtsprozenten Kalziumtitanat, 0,5 ' 85 ' Magnesiumtitanat, 1 ' 60 ' Wismuttitanat und 0,5 ' 50 ' Lanthantitanat oder von chemischen Verbindungen, die während des Dichtbrennens die vorgenannten Stoffe ergeben, dichtgebrannt wird.This object is achieved according to the invention in that a mixture from 1 to 85 percent by weight calcium titanate, 0.5 '85' magnesium titanate, 1 ' 60 'bismuth titanate and 0.5' 50 'lanthanum titanate or of chemical compounds, which result in the aforementioned substances during the dense burning, is dense burned.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß das vorgeschlagene keramische Dielektrikum eine um 20 % bis 50 % höhere Dielektrizitätskonstante aufweist als das vorbekannte Dielektrik»s In weiterer Ausgestaltung der Erfindung ist beabsichtigt, zur Bildung von Bi2(TiO3)3 während des Dichtbrennens als Ausgangskomponenten Bi203 und TiO2 in stöchiometrischer Menge dem Gemisch zuzusetzen, die sich während des Dichtbrennens zu Bi2(TiO3)3 verbinden.The advantages achieved with the invention are in particular: that the proposed ceramic dielectric has a dielectric constant of 20% to 50% higher has than the previously known dielectric »s In further development The invention is intended to form Bi2 (TiO3) 3 during dense firing add Bi203 and TiO2 in stoichiometric amounts to the mixture as starting components, which combine to form Bi2 (TiO3) 3 during the sealing process.

Ebenso wird zur Bildung von La2(UiO3)3 während des Dichtbrennens vorgeschlagen, als Ausgangskomponenten La2O3 und Ti02 in stöchiometrischer Menge dem Gemisch zuzusetzen, die sich während des Dichtbrennens zu La2(TiO3)3 verbinden.It is also suggested for the formation of La2 (UiO3) 3 during the dense firing, add La2O3 and Ti02 in stoichiometric amounts to the mixture as starting components, which combine to form La2 (TiO3) 3 during the sealing process.

Durch diese ohne nennenswerten zusätzlichen Aufwand durchführbaren Maßnahmen werden die Herstellungskosten des Dielektrikums erheblich gesenkt, da der Marktpreis von Bi2O3, La203 und iO2 jeweils niedriger als derjenige von Bi2(TiO3)3 und La2(TiO3)3 ist. Eine weitere Kostensenkung unter Beibehaltung der günstigen elektrischen Eigenschaften ergibt sich durch die Verwendung eines Gemisches aus etwa 60 Gewichtsprozenten La203 und 40 Gewichtsprozenten Nd203 und Pr6011, genannt 'Didymoxid', anstelle des reinen La203.This can be carried out without significant additional effort Measures, the manufacturing costs of the dielectric are significantly reduced because the market price of Bi2O3, La203 and iO2 each lower than that of Bi2 (TiO3) 3 and La2 is (TiO3) 3. Another cost reduction while maintaining the favorable electrical properties result from the use of a mixture about 60 percent by weight La203 and 40 percent by weight Nd203 and Pr6011 'Didymoxide' instead of the pure La203.

Gemäß einem weiteren Merkmal der Erfindung ist vorgesehen, daß zur Herstellung eines Dielektrikums aus Keramik N 1000 (EEC-Mittelwert = -1000,10-6 1/OC) ein Gemisch aus 72 Gewichtsprozenten CaTi03, 5 Gewichtsprozenten Mg2TiO4, 20 Gewichtsprozenten Bi2(Ti 03)3 und 3 Gewichtsprozenten La2(TiO3)3 dichtgebrannt wird.According to a further feature of the invention it is provided that for Manufacture of a dielectric from ceramic N 1000 (EEC mean value = -1000.10-6 1 / OC) a mixture of 72 percent by weight CaTi03, 5 percent by weight Mg2TiO4, 20 percent by weight Bi2 (Ti 03) 3 and 3 percent by weight La2 (TiO3) 3 tightly fired will.

Weiterhin wird vorgeschlagen, zur Herstellung eines Dielektrikums aus Keramik N 750 (TKc-Mittelwert 1 -750.10 6 1/OC) ein Gemisch aus 65 Gewichtsprozenten CaTiO3, 8 Gewichtsprozenten M¢2EiO4, 18 Gewichtsprozenten Bi2(TiO3)3 und 9 Gewichtsprozenten La2(iO3)3 d ichtzubrennen.It is also proposed to produce a dielectric made of ceramic N 750 (TKc average 1 -750.10 6 1 / OC) a mixture of 65 percent by weight CaTiO3, 8 percent by weight M [2EiO4], 18 percent by weight Bi2 (TiO3) 3 and 9 percent by weight La2 (iO3) 3 burns tightly.

Gemäß einer weiteren Ausbildung der Erfindung wird das Gemisch mit Tylose(R)-Lösung als Plastifizierungsmittel versetzt, danach in die gewünschte Form gebracht und anschließend eine Stunde lang bei 1250 bis 1290°C dichtgebrannt.According to a further embodiment of the invention, the mixture is with Tylose (R) solution added as a plasticizer, then in the desired shape brought and then burned tightly for one hour at 1250 to 1290 ° C.

Weitere Vorteile und Einzelheiten des erfindungsgemäßen Verfahrens ergeben sich aus der nachfolgenden Tabelle.Further advantages and details of the method according to the invention result from the following table.

Diese Tabelle zeigt die elektrischen Eigenschaften von 12 verschiedenen Gemischen mit den bekannten Gemischen 1 und 2 und den Gemischen 3 bis 12 nach der Erfindung. Man erkennt, daß ausgehend vom Gemisch 2 mit zunehmendem Gehalt von Lanthantitanat der Wert der Dielektrizitätskonstante eine Erhöhung von etwa 50 % zeigt (Gemisch 3 bis 5), um dann kontinuierlich wieder abzunehmen. Der Temperaturkoeffizient der Kapazität zeigt mit steigendem Gehalt von Lanthantitanat eine Zunahme in positiver Richtung. Das Gemisch 5 wurde daher bevorzugt zur Herstellung eines Dielektrikums N 1000 und das Gemisch 8 zur Herstellung einer Keramik N 750 ausgewählt. Für beide Gemische zeigt auch der Verlustwinkel günstige Werte # = 1,6.10-4 bzw. # = 1,5.10-4. Die Durchschlagsspannung liegt mit Werten von US = 20 kV-/mm bzw. US5 = 24 kV-/mm ebenfalls sehr günstig. Bestandteile Eigenschaften IJ. u' 0 H t til tn H td octw Ir H ct H Ir H I# Õ Q X tt trl H xt t m m (D H O H O X O m O m K < I:r H 53 N n, O O CD tta, 1 P zog1 0 1 w0 t0 O t4 H o1 p Irn a, H oil b1w H CD P 0 H 1 P! 1 0 0 O o 0 ct CD (D CD 0) 0i Gewichts-* 1 78,6 1, 21, 1200 170 1, 2 7 -1200 16 2 1,8 20, ~~1260 102 1,1 14- -1070 18 3 77,0 1,( L1,( I,c 1250 153i 1>7 7 -lllc5 9 LC 76>3 1,C 1LCC 7;L 1,C 1250 143 2, 5 5 -1140 22 5 72,8 2, a 1250 12 -1065 20 6 9,6 8,E Iq,C 2, 1270 1281 1,9 1Lc -1035 zo 7 5,6 8,f 17,8 8,3 1270 122 1,7 50 - 8rCO 23 8 >LC,3 8,; 12,L 6,C q,l. 1 zo 122 1,5 rC5 - 830 24- 9 4,3 8, 17, 9,9 1280 118 1,6 40 - 786 22 10 2,3 11,9 17,0 8,8 1280 110 1,1 45 - 785 22 11 73,4 2, 0,8 6,8 16,1 1280 115 2,2 30 - 809 23 12 8,1 1, 3, 12, 15,C 1290 116 1,9 32 - 870 21 This table shows the electrical properties of 12 different mixtures with the known mixtures 1 and 2 and the mixtures 3 to 12 according to the invention. It can be seen that, starting from mixture 2, with increasing content of lanthanum titanate, the value of the dielectric constant shows an increase of about 50% (mixture 3 to 5), only to then decrease again continuously. The temperature coefficient of the capacity shows an increase in a positive direction with increasing lanthanum titanate content. The mixture 5 was therefore preferably selected for the production of a dielectric N 1000 and the mixture 8 for the production of a ceramic N 750. For both mixtures, the loss angle also shows favorable values # = 1.6.10-4 and # = 1.5.10-4. The breakdown voltage is also very favorable with values of US = 20 kV- / mm and US5 = 24 kV- / mm. Ingredients properties IJ. u '0 H t til tn H td octw Ir H ct H Ir HI # Õ QX tt trl H xt tmm (DHOHOXO m O m K < I: r H 53 N n, OO CD tta, 1 P drew1 0 1 w0 t0 O t4 H o1 p Irn a, H oil b1w H CD P 0 H 1 P! 1 0 0 O o 0 ct CD (D CD 0) 0i Weight * 1 78.6 1, 21, 1200 170 1, 2 7 -1200 16 2 1.8 20, ~~ 1260 102 1.1 14- -1070 18 3 77.0 1, (L1, (I, c 1250 153i 1> 7 7 -lllc5 9 LC 76> 3 1, C 1LCC 7; L 1, C 1250 143 2, 5 5 -1140 22 5 72.8 2, a 1250 12 -1065 20 6 9.6 8, E Iq, C 2, 1270 1281 1.9 1 Lc -1035 zo 7 5.6 8, f 17.8 8.3 1270 122 1.7 50 - 8rCO 23 8> LC, 3 8 ,; 12, L 6, C q, l. 1 zo 122 1.5 rC5 - 830 24- 9 4.3 8, 17, 9.9 1280 118 1.6 40 - 786 22 10 2.3 11.9 17.0 8.8 1280 110 1.1 45 - 785 22 11 73.4 2, 0.8 6.8 16.1 1280 115 2.2 30 - 809 23 12 8.1 1, 3, 12, 15, C 1290 116 1.9 32 - 870 21

Claims (6)

Patentansprüche: Verfahren zur Herstellung eines Kalziumtitanat, Magnesiumtitanat und Wismuttitanat enthaltenden, dichtgebrannten keramischen Dielektrikums nach Patent .... (Patentanmeldung P 22 38 201.0), dadurch gekennzeichnet, daß ein Gemisch von 1 bis 85 Gewichtsprozenten Kalziumtitanat, 0,5 ' 85 ' Nagnesiumtitanat, 1 ' 60 ' Wismuttitanat und 0,5 ' 50 ' Lanthantitanat oder von chemischen Verbindungen, die während des Dichtbrennens die vorgenannten Stoffe ergeben, dichtgebrannt wird.Claims: Process for the production of a calcium titanate, magnesium titanate and bismuth titanate-containing, densely fired ceramic dielectric according to patent .... (Patent application P 22 38 201.0), characterized in that a mixture of 1 to 85 percent by weight calcium titanate, 0.5 '85' nagnesium titanate, 1 '60' Bismuth titanate and 0.5 '50' lanthanum titanate or of chemical compounds that result during the dense burning the aforementioned substances, is dense burned. 2. Verfahren zur Herstellung eines Dielektrikums nach Anspruch 1, dadurch gekennzeichnet, daß ein Gemisch von 72 Gewichtsprozenten Kalziumtitanat, Magnesiumtitanat, 20 ' Wismuttitanat und 3 ' Lanthantitanat dichtgebrannt wird.2. A method for producing a dielectric according to claim 1, characterized in that a mixture of 72 percent by weight calcium titanate, Magnesium titanate, 20 'bismuth titanate and 3' lanthanum titanate is tightly fired. 3. Verfahren zur Herstellung eines Dielektrikums nach Anspruch 1, dadurch gekennzeichnet, daß ein Gemisch von 65. Gewichtsprozenten Kalziumtitanat, 8 ' Magnesiumtitanat, 18 ' Wismuttitanat und 9 ' Ilantliantitanat dichtgebrannt wird.3. A method for producing a dielectric according to claim 1, characterized in that a mixture of 65 percent by weight calcium titanate, 8 'Magnesium titanate, 18' Bismuth titanate and 9 'Ilantliantitanate tightly fired will. 4. Verfahren zur Herstellung eines Dielektrikums nach Anspruch 1 oder einem der folgenden, dadurch gekennzeichnet, daß zur Bildung des Wismuttitanats während des Dichtbrennens als Ausgangskomponenten Wismutoxid und Titanoxid in stöchiometrischer Menge dem Gemisch zugesetzt werden, die sich während des Dichtbrennens zu Wismuttitanat verbinden.4. A method for producing a dielectric according to claim 1 or one of the following, characterized in that for the formation of the bismuth titanate Bismuth oxide and titanium oxide in stoichiometric form as the starting components during the dense firing Amount to be added to the mixture, which becomes bismuth titanate during the dense firing associate. 5. Verfahren zur Herstellung eines Dielektrikums nach zumindest einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß zur Bildung des Lanthantitanats während des Dichtbrennens als Ausgangakomponenten Lanthanoxid oder Lanthandidymoxid und Ditanoxid in stöchiometrischer Menge dem Gemisch zugesetzt werden, die sich während des Dichtbrennens zu entsprechenden Titanaten verbinden.5. A method for producing a dielectric according to at least one of claims 1 to 3, characterized in that for the formation of the lanthanum titanate lanthanum oxide or lanthanum didymium oxide as starting components during the sealing firing and titanium oxide added to the mixture in a stoichiometric amount which combine to form corresponding titanates during the dense firing. 6. Verfahren zur Herstellung eines Dielektrikums nach zumindest einem der Ansprüche 1 bis 3, dadurch gekennseichnet, daß das Gemisch mit Tylose(B) -Lösung als Plastifizierungsmittel versetzt, danach in die gewünschte Form gebracht und anschließend eine Stunde lang bei 1250 bis 12900C dichtgebrannt wird.6. A method for producing a dielectric according to at least one of claims 1 to 3, characterized in that the mixture with Tylose (B) solution added as a plasticizer, then brought into the desired shape and is then burned tightly for one hour at 1250 to 12900C.
DE19762629297 1972-08-03 1976-06-30 Vitrified ceramic dielectric prodn. with high dielectric constant - from calcium, magnesium, barium and lanthanum titanates Withdrawn DE2629297A1 (en)

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DE2238201A DE2238201C3 (en) 1972-08-03 1972-08-03 Process for the production of a ceramic dielectric
DE19762629297 DE2629297A1 (en) 1972-08-03 1976-06-30 Vitrified ceramic dielectric prodn. with high dielectric constant - from calcium, magnesium, barium and lanthanum titanates

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DE2238201A DE2238201C3 (en) 1972-08-03 1972-08-03 Process for the production of a ceramic dielectric
DE19762629297 DE2629297A1 (en) 1972-08-03 1976-06-30 Vitrified ceramic dielectric prodn. with high dielectric constant - from calcium, magnesium, barium and lanthanum titanates

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4242213A (en) * 1978-04-19 1980-12-30 Murata Manufacturing Co., Ltd. Dielectric ceramic compositions based on magnesium, calcium and rare earth metal titanates

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4242213A (en) * 1978-04-19 1980-12-30 Murata Manufacturing Co., Ltd. Dielectric ceramic compositions based on magnesium, calcium and rare earth metal titanates

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DE2238201B2 (en) 1977-01-20
DE2238201A1 (en) 1974-02-14

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