Glass compositions with low dielectric losses

Details Glass compositions with low dielectric losses Glass compositions with low dielectric losses

1985-08-14

1986-09-02

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 59, 501 62, C03C 3108, C03C 3105, C03C 3118

Patent

active

046096329

ABSTRACT:
Alkali-free glasses with low dielectric losses, thermal expansion coefficients of 3.15 to 4.97.times.10.sup.-6 /.degree.C. in the temperature range from 20.degree. to 300.degree. C., adequate acid resistance, dielectric loss factors tan .delta. of 3.94 to 24.9.times.10.sup.-4 and processing temperatures (V.sub.A) of 1132.degree. to 1280.degree. C., have the following composition (in weight percent): 52.50-60.20 SiO.sub.2, 2.80-3.80 B.sub.2 O.sub.3, 8-14 Al.sub.2 O.sub.3, 6.0-20.20 PbO, 2.0-13.5 CaO, 0-3.5 MgO, 0-8 ZnO, 0-4.7 BaO, .SIGMA.PbO, CaO, MgO, ZnO, BaO 21.10-34.0, 0-1.0 F, 0.20-0.50 Sb.sub.2 O.sub.3.

REFERENCES:
patent: 2469867 (1949-05-01), Danzin
patent: 4501819 (1985-02-01), Yatsuda et al.

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