High frequency wave absorbing ceramics

Details High frequency wave absorbing ceramics High frequency wave absorbing ceramics

1987-11-25

1989-04-25

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

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

C04B 3500

Patent

active

048248126

ABSTRACT:
A high frequency wave absorbing ceramics can be used, for example, as an EMI preventive filter for interrupting high frequency wave intruding into electronic circuits. The high frequency wave absorbing ceramics are composed of a ternary composition comprising from 50 to 82.5 mol % of lead iron niobate Pb(Fe1/2Nb1/2)O.sub.3, from 17.5 to 40 mol % of lead iron tungstate Pb(Fe2/3W1/3)O.sub.3 and not more than 25 mole % of lead cobalt niobate Pb(Co1/3Nb2/3)O.sub.3 based on the total 100 mol % of a composition composed of lead iron niobate Pb(Fe1/2Nb1/2)O.sub.3, lead iron tungstate Pb(Fe2/3W1/3)O.sub.3 and lead cobalt niobate Pb(Co1/3Nb2/3)O.sub.3.

REFERENCES:
Ceramic Bulletin, vol. 63, No. 6, pp. 808-810, 820, `Dielectric Properties in the Pb(Fe1/2Nb1/2)O.sub.3 -Pb(Ni1/3Nb2/3)O.sub.3 Solid-Solution System`, by Thomas R. Shrout et al.

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