Glasses exhibiting low thermal coefficients of elasticity

Details Glasses exhibiting low thermal coefficients of elasticity Glasses exhibiting low thermal coefficients of elasticity

1988-07-08

1989-08-08

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 60, C03C 3091

Patent

active

048552607

ABSTRACT:
Glasses exhibiting low thermal coefficients of elastic modulus, good glass stability, low thermal expansion, and good chemical durability are provided, a first glass type including glasses consisting essentially, in weight percent on the oxide basis, of about 60-64% SiO.sub.2, 14-18% B.sub.2 O.sub.3, 8.5-10% Al.sub.2 O.sub.3, 4-7% Na.sub.2 O, and 2-12% BaO, and a second group comprising alkali silicate glasses consisting essentially, in weight percent on the oxide basis, of about 51-55% SiO.sub.2, 10-13% K.sub.2 O, 5-15% ZnO, 5-15 BaO, and 10-20% PbO.

REFERENCES:
patent: 2392314 (1943-03-01), Dalton
patent: 3506385 (1970-04-01), Weber et al.
"Microweighing Goes On Line In Real Time," H. Patashnick and G. Rupprecht, Research and Development, pp. 74-78 (Jun. 1986).
"Temperature Dependence of the Shear Modulus and Attenuation of Ultrasound in Silicate Glasses," V. S. Postnikov et al., Ivz. Akad. Naukd. SSSR, Neorg. Matr., 7 (3) pp. 485-489 (1971).

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