Dielectric ceramic material and method for making

Details Dielectric ceramic material and method for making Dielectric ceramic material and method for making

1994-05-19

1996-10-15

Jones, Deborah

Compositions: ceramic

Ceramic compositions

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

C04B 3526

Patent

active

055653910

ABSTRACT:
A dielectric ceramic material containing lead, calcium, tungsten, iron, and niobium in oxide form has a primary phase of the composition: (pb.sub.1-z Ca.sub.z)(W.sub.s Fe.sub.t Nb.sub.u)O.sub.3 wherein 0.3.ltoreq.z.ltoreq.0.9, s+t+u=1, 0.01.ltoreq.s.ltoreq.0.2, 0.5.ltoreq.t.ltoreq.0.6, and 0.2.ltoreq.u.ltoreq.0.49. The material which can be effectively fired at low temperature has a minimal temperature coefficient of resonance frequency in the microwave frequencies, a high dielectric constant, and a high Q.multidot.f value.

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Proceedings of the 10th Meeting on Ferroelectric Materials and Their Applications Kyoto 1993, pp. 179-180, "Pb(Fe.sub.2/3 W.sub.1/3)O.sub.3 -(PbCa)(Fe.sub.1/2 Nb.sub.1/2)O.sub.3 " (no month).
Jpn. J. Appl. Phys., vol. 32, 1993, No. 9B, Sep. 1993, pp. 4314-4318, Mutsuko Nakano, et al., "Low-Temperature-Fireable Dielectric Material Pb(Fe.sub.2/3 W.sub.1/3)O.sub.3 -(Pb,Ca)(Fe.sub.1/2 Nb 1/2)O.sub.3 For Microwave Use".
Jpn. J. Appl. Phys., vol. 31, 1992, No. 9B, Sep. 1992, pp. 3144-3147, Junichi Kato, et al., "Dielectric Properties of (PbCa)(MeNb)O.sub.3 at Microwave Frequencies".
Ceramic Bulletin, vol. 62, No. 2 (1983), pp. 216-218, Sei-Joo Jang, et al., "Low-Firing Capacitor Dielectrics In The System Pb(Fe.sub.2/3 W.sub.1/3)O.sub.3 -Pb(Fe.sub.1/2 Nb.sub.1/2)O.sub.3 -Pb.sub.5 Ge.sub.3 O.sub.11 " (no month).
Proceedings of the 1st Meeting on Ferroelectric Materials and Their Applications, Kyoto, 1977, "Properties of Pb(Fe.sub.2/3 W.sub.1/3)O.sub.3 -Pb(Fe.sub.1/2 Nb.sub.1/2)O.sub.3 Ceramics", Masatomo Yonezawa, et al., pp. 297-301 (no month).

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