High modulus rare earth and beryllium containing silicate glass

Details High modulus rare earth and beryllium containing silicate glass High modulus rare earth and beryllium containing silicate glass

1972-06-02

1976-03-30

McArthur, Helen M.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 50, C03C 304, C03C 1300

Patent

active

039472817

ABSTRACT:
Glass compositions having a Young's modulus of at least 16 million psi and a specific modulus of at least 110 million inches consisting essentially of approximately, by weight, 20-43% SiO.sub.2, 8-21% Al.sub.2 O.sub.3, 4-10% BeO, 27-58% of at least one oxide selected from a first group consisting of Y.sub.2 O.sub.3, La.sub.2 O.sub.3, Nd.sub.2 O.sub.3, Ce.sub.2 O.sub.3 and the mixed rare earth oxides and 3-12% of at least one oxide selected from a second group consisting of MgO, ZrO.sub.2, ZnO and CaO, the molar ratio of BeO to the total content of said first group oxides being from 1.0-3.0.

REFERENCES:
patent: 2805166 (1957-09-01), Loffler
patent: 3127277 (1964-03-01), Tiede
patent: 3483072 (1969-12-01), Cox et al.
patent: 3573078 (1971-03-01), Bacon
patent: 3597246 (1971-08-01), McMarlin
patent: 3620787 (1971-11-01), McMarlin
patent: 3814611 (1974-06-01), Dumbaugh, Jr.
Loewenstein, K. L., "Studies in the Composition and Structure of Glasses Possessing High Young's Moduli" - Phys. & Chem of Glasses, 2 (3), June 1961, pp. 69-82.
Tiede, R. L., "High Modulus Glass Fibers for Structural Plastics" - Glass Ind, Dec. 1960, pp. 699-700, 717-718.

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