DIELECTRIC PORCELAIN COMPOSITION

PURPOSE:To obtain a dielectric porcelain compsn. capable of firing at <=1,160 deg.C, satisfying X7R characteristics in spite of its high dielectric constant of >=1,000, ensuring high mechanical strength of porcelain and forming a dielectric porcelain layer having a low variation of capacitance...

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Bibliographic Details
Main Authors SHIBATA MASAMITSU, IWAMOTO SAKIKO, HAMACHI YUKIO
Format Patent
LanguageEnglish
Published 05.12.1995
Edition6
Subjects
ARTIFICIAL STONE
BASIC ELECTRIC ELEMENTS
CABLES
CAPACITORS
CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
CONDUCTORS
ELECTRICITY
INSULATORS
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES
SLAG
TREATMENT OF NATURAL STONE
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Summary:PURPOSE:To obtain a dielectric porcelain compsn. capable of firing at <=1,160 deg.C, satisfying X7R characteristics in spite of its high dielectric constant of >=1,000, ensuring high mechanical strength of porcelain and forming a dielectric porcelain layer having a low variation of capacitance due to temp. at the time of impressing DC voltage corresponding to 50% of rated voltage in accordance with the standards of RB characteristics stipulated by JIS C6429 when the thickness of the layer is reduced to 5-15mum. CONSTITUTION:This dielectric porcelain compsn. consists of 97.5-99.95wt.% base represented by the general formula, [100-(a+b+c+d)1BaTiO3+aZnO+b(2 Bi2O3.3SnO2)+cTa2O5+dRe2O3 (where Re is at least one kind of element selected from among La, Pr, Nd, Sm, Dy and Er, 0.5<=a<= 4.5, 0.5<=b<=4.5, 0.5<=c<=4.5 and 0.5<=d<=5.5) and 0.05-2.5wt.% SiO2-based glass as a secondary component.
Bibliography:Application Number: JP19940109841