Abstract A refractory-ceramic composition is disclosed which contains from 15 to 30 percent by weight calcium aluminate cement and the balance a fused silica particle mixture, this mixture being composed of rodlike and platelike fused silica particles of as great a degree of purity as reasonable possible. The mixture of the silica particles is graded as to size so as to have a high proportion of comparatively large particles which abut against and interfit with one another in the final composition. Such a refractory-ceramic composition is formed into a final article by being mixed with water, then by being cast into a desired shape and then by being allowed to hydrate or ''''cure'''' so as to become hard. The resulting article is preferably air dried and then gradually heated to a temperature slightly above the temperature at which it will be used.
Inventors
👤 Earl G Spangler
👤 Milton M Moore
👤 Ronald L Topp
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-30 22:08
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
A refractory-ceramic composition as claimed in claim 1 wherein: from about 40 to 80 percent by weight of said fused silica particles are from a -4 to +12 mesh size, from about 0 to 30 percent by weight of said fused silica particles are from a -12 to +32 mesh size and from about 20 to 60 percent by weight of said fused silica particles are form a -32 to +200 mesh size, and said aluminous cement consists of particles of -200 mesh size.
Claim 2
Dependent Claim
54 words
A refractory-ceramic composition as claimed in claim 1 wherein: the proportions of said silica particles in said composition are shown in the cross hatched area in the triaxial diagram of the drawing annexed to this specification, and said aluminous cement is finely ground so as to consist of particles of -200 mesh in size.
Claim 3
Dependent Claim
16 words
A refractory composition as claimed in claim 1 wherein: said aluminous cement is fused aluminous cement.
Claim 4
Dependent Claim
131 words
A cast refractory-ceramic concrete article capable of being used as tooling in the fabrication of metal parts which comprise: flat platelike particles of fused silica and rodlike particles of fused silica interfitting with one another so as to abut against and reinforce one another in such a manner as to have interstices between said platelike and said rodlike particles, said interstices being filled with a mixture of fused silica particles which are smaller than said platelike particles and said rodlike particles and a hydrated aluminous cement, said cement bonding all of said silica particles to one another, the composition of said article without including the weight of the water within said article is from about 15 to 30 percent by weight of said aluminous cement and the remainder fused silica particles.
Claim 5
Dependent Claim
85 words
A cast refractory-ceramic concrete article as claimed in claim 5 wherein: all of said silica particles are proportioned by size so that from about 40 to 80 percent by weight of all of said particles are form a -4 to +12 mesh size, from about 0 to 30 percent by weight of all of said particles are from a -12 to +32 mesh size, from about 20 to 60 percent by weight of all of said particles are from a -32 to +200 mesh size.
Claim 6
Dependent Claim
21 words
A cast refractory-ceramic concrete article as claimed in claim 6 wherein: said aluminous cement consists of particles of -200 mesh size.