Crystal growth inhibitor for glassy low dielectric inorganic com

Details Crystal growth inhibitor for glassy low dielectric inorganic com Crystal growth inhibitor for glassy low dielectric inorganic com

1990-10-11

1992-01-07

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 21, 501 32, 501 66, 501 70, C03C 1400

Patent

active

050791940

ABSTRACT:
A ceramic composition for forming a ceramic dielectric body having a dielectric constant of less than about 4.2 and a TCE of less than about 4.0 ppm/c. The composition comprises a mixture of finely divided particles of 25-50 weight percent borosilicate glass and 50-75 weight percent high silica glass and 1-25 weight percent sufficient of crystalline ceramic material to inhibit the formation of crystalline forms of silica. The high silica glass contains essentially 0.5-1 wt. % alumina, 1-5 wt. % B.sub.2 O and approximately 95-98 wt. % SiO.sub.2. The mixture is fired at a temperature of less than 1000.degree. C.

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