US Patent No: 4,843,046

Number of patents in Portfolio can not be more than 2000

Ceramic composition of high dielectric constant comprising PbO.sub.3, La.sub.2 O.sub.3, MO, ZrO.sub.2 and TiO.sub.2

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

Disclosed herein is a ceramic composition of high dielectric constant which comprises the major constituents of PbO, La.sub.2 O.sub.3, MO, ZrO.sub.2, and TiO.sub.2 in the ratio defined by the formula below. (1-x-y)PbO.multidot.x/2La.sub.2 O.sub.3 .multidot.yMo.multidot.(1-z)ZrO.sub.2 .multidot.zTiO.sub.2 where, M represents Ba and/or Sr; 0.06.ltoreq.x.ltoreq.0.30 0.03.ltoreq.y.ltoreq.0.48 0.20.ltoreq.z.ltoreq.0.50 and an additive represented by PbWo.sub.4 and/or Pb(Mg.sub.1/2 W.sub.1/2)O.sub.3 in an amount of 1-40 wt % (in total) based on the above-mentioned major constituents (provided that the amount of PbWO.sub.4 is less than 15 wt % of the amount of the major constituents and the amount of Pb(Mg.sub.1/2 W.sub.1/2)O.sub.3 is less than 40 wt % of the amount of the major constituents). Less than 5 mol % of all Pb in the composition may be replaced by Ag and/or less than 6 mol % of all Pb in the composition may be replaced by Bi.

Loading the Abstract Image... loading....

First Claim

See full text

all claims..

Related Publications

Loading Related Publications... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
MITSUBISHI MINING & CEMENT CO., LTD.TOKYO64

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Inoue, Takeshi Tokyo, JP 172 1635
Saito, Masashi Kanagawa, JP 176 758
Yamaguchi, Takashi Saitama, JP 485 3061

Cited Art Landscape

Patent Info (Count) # Cites Year
 
MRA LABORATORIES, INC., NORTH ADAMS, MA A CORP OF DE (2)
4,219,866 Ceramic capacitor having a dielectric of (Pb,La) (Zr,Ti)O.sub.3 and BaTiO.sub.3 16 1979
4,706,163 Capacitor with dielectric of PLZT and an intergranular borate 10 1987
 
E. I. DU PONT DE NEMOURS AND COMPANY (1)
4,228,482 Multilayer ceramic capacitors 14 1977

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
INTEL CORPORATION (2)
8,143,110 Methods and apparatuses to stiffen integrated circuit package 0 2009
8,502,400 Methods and apparatuses to stiffen integrated circuit package 0 2012
 
MITSUBISHI CHEMICAL CORPORATION (1)
5,378,382 Piezoelectric ceramic composition for actuator 12 1993
 
The Penn State Research Foundation (1)
5,545,184 Cardiac defibrillator with high energy storage antiferroelectric capacitor 41 1995

Full Text

 
loading....