Low dielectric loss silicon nitride based material

Details Low dielectric loss silicon nitride based material Low dielectric loss silicon nitride based material

1985-04-08

1987-03-31

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Refractory

75233, 501152, C04B 3558, C04B 3510

Patent

active

046543155

ABSTRACT:
A composition having a low dielectric constant and low dielectric loss tangent from room temperature to at least about 1100.degree. C. which comprises a silicon nitride based material containing an effective amount of a sintering aid selected from lanthanum oxide, yttrium oxide, lanthanum aluminate, yttrium aluminate, aluminum oxide and mixtures thereof and an effective amount of a low dielectric loss promotor selected from the group consisting of iron, chromium and mixtures thereof is a suitable radome material and electromagnetic window material.

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