Glass manufacturing – Processes – Self-supporting particle making
Patent
1984-05-02
1985-04-23
Lindsay, Robert
Glass manufacturing
Processes
Self-supporting particle making
65 33, 65 41, 65 5934, 65 5935, 166 65R, 174 50, 174 61, 174152GM, 501 74, C03C 2702, C03C 322, H01B 1726
Patent
active
045127913
ABSTRACT:
First and second spaced members are hermetically sealed by a partially amorphous and partially crystalline insulating material. The insulating material is non-hygroscopic and is able to withstand forces of about 26,000 psi at about 700.degree. F. It may provide resistances of at least 10,000 megohms even when subjected to 500 volts AC or DC and to steam at about 212.degree. F. for three (3) days. A second insulating layer may be fused to the first insulating layer with essentially the same properties and composition as the first layer. However, the second layer may be more crystalline than the first layer to provide a mechanical and chemical barrier. The insulating materials may be formed from the oxides of lead, zinc, aluminum, silicon, cerium, lanthanum, cobalt, sodium, zirconium, bismuth and molybdenum. The oxides of lead, silicon, bismuth and sodium may be glass formers. The oxides of cerium, lanthanum and zirconium may form crystals. A mixture of the oxides may be heated to at least 2000.degree. F. for several hours and quenched in water to form first beads. These beads may be disposed between the first and second members. The assembly may then be heated for a limited time at about 1900.degree. F. and then quenched. The second insulating material may be formed into beads as described above. These beads may be disposed to abut the first beads. The insulating materials may then be fused by heating them to the elevated temperature for the limited time as discussed above.
REFERENCES:
patent: 2138660 (1938-11-01), Mann
patent: 2147418 (1939-02-01), Bahls
patent: 2198734 (1940-04-01), Littleton
patent: 2972176 (1961-02-01), Gravley
patent: 3219753 (1965-11-01), Vassos
patent: 3225132 (1965-12-01), Baas et al.
patent: 3291633 (1966-12-01), Wissinger
patent: 3303268 (1967-02-01), Darnois
patent: 3307958 (1967-03-01), Earl
patent: 3331913 (1967-07-01), Johnson
patent: 4140613 (1979-02-01), Inoue et al.
patent: 4174145 (1979-11-01), Oeschger et al.
Lindsay Robert
Roston Ellsworth R.
Schwartz Charles H.
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