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EP0085941A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Ceramic composition of high dielectric constant

Assignee: Panasonic Holdings Corp
•
Filing: 1983-02-02
•
Granted: —
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Expires: 2003-02-02
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Abstract

Abstract A ceramic compositions of a high dielectric constant is provided, which consists of 100 mol parts of barium metatitanate (BaTiO 3 ). (2/3) (7±1) mol parts of cerium dioxide, and 7± mol parts of titanium dioxide (Ti0 2 ), and to which 0.05 to 0.2 mol part of Mn0 2 is added as needed. The ceramic composition has a ceramic microstructure in which a grain size is as small as 2 to 3 µm and a pore size is small to be not more than 3 µm. The ceramic composition has a high dielectric constant of about 10,000, a high breakdown voltage, and little dependency on voltage. The ceramic composition is very suitable as a thin dielectric film for a laminated ceramic chip capacitor.

Inventors

  • 👤 Gen Itakura
  • 👤 Takashi Iguchi
  • 👤 Takayuki Kuroda
  • 👤 Kaneomi Nagase

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 03:30
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682; H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1209; H01G4/1218; H01G4/1227

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 40 words
A ceramic composition of a high dielectric constant, characterized in that said composition consists of 100 mol parts of barium metatitanate (BaTiO 3 ), (2/3)(7±1) mol parts of cerium dioxide, and 7±1 mol parts of titanium dioxide (TiO 2 ).
Claim 2
Dependent Claim 40 words
A ceramic composition of a high dielectric constant, characterized in that said composition consists of 100 mol parts of barium metatitanate (BaTiO 3 ), (2/3)(7±1) mol parts of cerium dioxide, and 7±1 mol parts of titanium dioxide (TiO 2 ).
Claim 3
Dependent Claim 56 words
A ceramic composition-of a high dielectric constant, characterized in that 0.05 to 0.2 mol part of manganese dioxide (MnO 2 ) is added to a composition which consists of 100 mol parts of barium metatitanate (BaTiO 3 ) , (2/3) (7±1) mol parts of cerium dioxide, and 7+1 mol parts of titanium dioxide (TiO 2 ).
Claim 4
Dependent Claim 56 words
A ceramic composition-of a high dielectric constant, characterized in that 0.05 to 0.2 mol part of manganese dioxide (MnO 2 ) is added to a composition which consists of 100 mol parts of barium metatitanate (BaTiO 3 ) , (2/3) (7±1) mol parts of cerium dioxide, and 7+1 mol parts of titanium dioxide (TiO 2 ).

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