Glass manufacturing – Processes – Devitrifying glass or vitrifying crystalline glass
Patent
1976-04-01
1977-11-29
Bashore, S. Leon
Glass manufacturing
Processes
Devitrifying glass or vitrifying crystalline glass
65103, 65111, 65DIG2, 65DIG7, 156620, 156617SP, C03B 3200, C03B 3100
Patent
active
040604012
ABSTRACT:
The invention relates to siliceous materials in the form of elements of aligned elongated individual crystals and more particularly to methods of forming such elements, said methods comprising providing a siliceous melt which will yield at the temperature of crystallization a primary crystalline phase which has a silicate chain structure, and drawing said melt, crystal nucleation having been induced, the rate of drawing being such as to cause continuous propagation of crystals of the said primary phase generally in the direction of drawing. The melt is drawn after crystal nucleation from an orifice, which can be directly or indirectly heated, of any desirable shape, such as circular, elongated or annular so as to result in the element being of cylindrical, sheet or tubular form or even of more complicated shape such as in cross-section to approximate to a turbine or compressor blade shape. Means may be provided to cause the element to disintegrate into units of a smaller number of aligned elongated crystals or even of single elongated crystals.
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Handbook of Glass Manufacture, vol. II, Fay V. Tooley, Ogden Pub. Co., New York, 1961, pp. 192-199.
Maries Alan
Rogers Philip Sydney
Bashore S. Leon
Miga Frank W.
National Research Development Corporation
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