Hollow microspheres of silica glass and method of manufacture

Details Hollow microspheres of silica glass and method of manufacture Hollow microspheres of silica glass and method of manufacture

1980-08-15

1982-06-22

McCarthy, Helen M.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

65 214, 65 22, 106 75, 252317, 264 13, 264 15, 501 27, 501 39, 501 54, 501 65, C03C 300, C03C 306, C03C 308

Patent

active

043363385

ABSTRACT:
A method of manufacturing gel powder suitable for use as a starting material in the manufacture of hollow glass microspheres having a high concentration of silica. The powder is manufactured from a gel containing boron in the amount of about 1% to 20% (oxide equivalent mole percent), alkali metals, specifically potassium and sodium, in an amount exceeding 8% total, and the remainder silicon. Preferably, the ratio of potassium to sodium is greater than 1.5.

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