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US4522927A Expired / Lapsed US ⏱️ 0.0 years remaining

Dielectric ceramic composition

Assignee: Cement Co Ltd
•
Filing: 1983-10-26
•
Granted: 1985-06-11
•
Expires: 2003-10-26
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Abstract

Abstract A dielectric ceramic composition having a composition represented by the formula xBaO-yNd.sub.2 O.sub.3 -z(Ti.sub.1-m Zr.sub.m)O.sub.2 wherein x+y+z=1.00 0<m≦0.25 and x, y, and z are in the molar ratio region surrounded by the points a, b, c, and d which are represented by the following x-y-z coordinates: ______________________________________ x y z ______________________________________ a 0.15 0.12 0.73 b 0.15 0.18 0.67 c 0.05 0.18 0.77 d 0.05 0.12 0.83 ______________________________________

Inventors

  • 👤 Masao Kashima
  • 👤 Noboru Tomuro

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 11:09
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/48; C04B35/49

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 79 words
A dielectric ceramic composition having a composition represented by the formula xBaO-yNd.sub.2 O.sub.3 -z(Ti.sub.1-m Zr.sub.m)O.sub.2 wherein x+y+z=1.00, m is between 0.05 and 0.25, and x, y, and z are in the molar ratio region surrounded by the points a, b, c, and d which are represented by the following x-y-z coordinates: ______________________________________ x y z ______________________________________ a 0.15 0.12 0.73 b 0.15 0.18 0.67 c 0.05 0.18 0.77 d 0.05 0.12 0.83 ______________________________________ said composition being free of bismuth.
Claim 2
Dependent Claim 79 words
A dielectric ceramic composition having a composition represented by the formula xBaO-yNd.sub.2 O.sub.3 -z(Ti.sub.1-m Zr.sub.m)O.sub.2 wherein x+y+z=1.00, m is between 0.05 and 0.25, and x, y, and z are in the molar ratio region surrounded by the points a, b, c, and d which are represented by the following x-y-z coordinates: ______________________________________ x y z ______________________________________ a 0.15 0.12 0.73 b 0.15 0.18 0.67 c 0.05 0.18 0.77 d 0.05 0.12 0.83 ______________________________________ said composition being free of bismuth.
Claim 3
Dependent Claim 58 words
A dielectric ceramic composition according to claim 1, which contains, besides said main components, at least one member selected from oxides of manganese, chromium, iron, nickel, and cobalt in amounts of 0.05-100% by weight of the total weight of the main components, in terms each of MnO 2 , Cr 2 O 3 , FeO, NiO, and CoO.

References Cited (Backward Citations)

JPS5020280A Cited
GB1431103A Cited
GB1442285A Cited
JPS5374298A Cited
JPS5761667A Cited
JPS5790808A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1988-06-10 1988-12-10 1989-06-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1992-06-10 1992-12-10 1993-06-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1996-06-10 1996-12-10 1997-06-11 $7700.00 Window Closed / Lapsed

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