Inventors:
Karin M. Kinsman - San Mateo CA
Ryan W. Dupon - San Carlos CA
Martha L. McCrum - Sunnyvale CA
Linas Mazeika - San Carlos CA
Amy S. Chu - Oakland CA
Assignee:
Raychem Corporation - Menlo Park CA
International Classification:
C04B 3326
Abstract:
A porcelain having 9 to 55% by weight of SiO. sub. 2, 36 to 87% by weight of Al. sub. 2 O. sub. 3, 0 to 2. 0% by weight of Fe. sub. 2 O. sub. 3, 0 to 1. 0% by weight of TiO. sub. 2, 0 to 0. 5% by weight of CaO, 0 to 0. 5% by weight of MgO, 1. 0 to 4. 0% by weight of K. sub. 2 O and Na. sub. 2 O combined, and 0. 25 to 25. 0% by weight of bismuth oxide is disclosed. The porcelain has unexpectedly high unglazed bending strength and may be used for dielectric and structural applications.