HOLLOW GLASS SPHERES

Hollow glass spheres having average densities of approximately 0.10 grams/cc to approximately 2.0 grams/cc are prepared by heating solid glass particles. The glass spheres consist essentially of the following ingredients in the following amounts state as weight percentages: SiO2(50 to 57%); R2O(2 to...

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Bibliographische Detailangaben
Hauptverfasser:	GOETZ, KENNETH, E, HAGARMAN, JAMES, A, GIOVENE, JOSEPH, P., JR
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS METALLURGY MINERAL OR SLAG WOOL SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS
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Beschreibung
Zusammenfassung:	Hollow glass spheres having average densities of approximately 0.10 grams/cc to approximately 2.0 grams/cc are prepared by heating solid glass particles. The glass spheres consist essentially of the following ingredients in the following amounts state as weight percentages: SiO2(50 to 57%); R2O(2 to 15%); B2O3(0 to 20%); S(0.05 to 1.5%); RO(2 to 25%); RO2(other than SiO2) (0 to 5%); R2O3(other than B2O3) (0 to 10%); R2O5(0 to 5%); and F(0 to 5%). R represents a metal or an element like phosphorous which combines with oxygen in glass. The sizes of the hollow glass spheres are selected to produce a maximum average strength for a desired average density.