UV-transmitting glasses

Details UV-transmitting glasses UV-transmitting glasses

1987-09-02

1988-12-20

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 56, 501905, C03C 3091, C03C 408, C03C 311

Patent

active

047925353

ABSTRACT:
Alkali boroaluminosilicate glasses exhibiting moderately high thermal expansion coefficients, good melting characteristics, and a UV transmittance of at least 80% in 1 mm thickness at a wavelength of 254 nm are described, such glasses consisting essentially of about 58-62%, SiO.sub.2, 15-18% B.sub.2 O.sub.3, 11.5-14.5% Al.sub.2 O.sub.3, 1-2.5% Li.sub.2 O, 5.5-6.5% Na.sub.2 O, 0-2% K.sub.2 O, and 0-0.6% Cl.

REFERENCES:
patent: 1886280 (1932-11-01), Locke et al.
patent: 2433928 (1948-01-01), Sheldon
patent: 3671380 (1972-06-01), Ali et al.
patent: 3994708 (1976-11-01), von Reth et al.
patent: 4018965 (1977-04-01), Kerko et al.
patent: 4396720 (1983-08-01), Beall et al.

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