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US 4,654,095 AGranted
Dielectric composition
AssigneeE. I. Du Pont de Nemours and Company
InventorJerry I. Steinberg
Life of this patent
Estimating the term…
Abstract
A dielectric composition comprising an admixture of finely divided solids comprising (a) a noncrystallizable glass of which the deformation temperature (T.sub.d) is 580.degree.-625.degree. C. and the softening point (T.sub.s) is 630.degree.-700.degree. C., and (T.sub.s -T.sub.d) is 50.degree.-75.degree. C., and (b) a refractory which is substantially insoluble in the glass at temperatures of 825.degree.-900.degree. C.
Claims8
A castable dielectric composition comprising a dispersion of finely divided solids comprising:
- (a) 50-75% wt. noncrystallizable glass of which the deformation temperature (T.sub.d) is 580.degree.-625.degree. C. and the softening point (T.sub.s) is 630.degree.-700.degree. C. and (T.sub.s -T.sub.d) is 50.degree.-75.degree. C.
- (b) 50-25% wt. refractory which is substantially insoluble in the glass at temperatures of 825.degree.-900.degree. C., the refractory and glass solids being selected from the group consisting of Al.sub.2 O.sub.3, mullite, cordierite, SiO.sub.2, CaZrO.sub.3, forsterite, ZrO.sub.2 and mixtures thereof both dispersed in a solution of
- (c) an organic polymeric binder in
- (d) volatile nonaqueous organic solvent.
1 more element
Dependencies are inferred from the claim text.