Microwave dielectric ceramic composition

Details Microwave dielectric ceramic composition Microwave dielectric ceramic composition

1992-01-22

1993-02-23

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Titanate, zirconate, stannate, niobate, or tantalate or...

501134, 501135, 252 629, 252518, 252520, 252521, 423592, 423593, 423598, 423641, C04B 3546, C04B 3548, C04B 3549, H01B 100

Patent

active

051889935

ABSTRACT:
A microwave dielectric ceramic composition which is obtained by selecting, in a composition formula of (A.sup.1+.sub.1/2 .multidot.B.sup.3+.sub.1/2) TiO.sub.3, Li.sup.1+ and Nd.sup.3+, Co.sup.3+ or Pr.sup.3+ as A.sup.1+ and B.sup.3+, respectively. The dielectric ceramic composition expressed by (A.sup.1+.sub.1/2 .multidot.B.sup.3+.sub.1/2) TiO.sub.3 has a high dielectric constant and has a temperature coefficient of resonance frequency .tau.f which is large on the minus side. MgO, CoO, ZnO, CaCO.sub.3 or SrCO.sub.3 is added to such a dielectric ceramic composition expressed by (A.sup.1+.sub.1/2 .multidot.B.sup.3+.sub.1/2 /TiO.sub.3, to improve the Q value of the dielectric ceramic composition.

REFERENCES:
patent: 4610969 (1986-08-01), Wada et al.
patent: 4610971 (1986-08-01), Wada et al.
patent: 4753906 (1988-06-01), Nishigaki et al.
patent: 4960551 (1990-10-01), Eonomoto et al.
patent: 5077247 (1991-12-01), Sato et al.

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