MANUFACTURE OF HOLLOW SILICATE SPHERE

PURPOSE:To obtain fine hollow silicate spheres having a uniform grain size and high compressive strength by forming fine liq. droplets contg. silicate and a compressive strength increaser, allowing the droplets to gel in an expandable state, and expanding and vitrifying the gelled spheres. CONSTITUT...

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Hauptverfasser:	HACHIMA SUSUMU, TERASE KUNIHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS THEREOF GLASS INORGANIC CHEMISTRY JOINING GLASS TO GLASS OR OTHER MATERIALS MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES METALLURGY MINERAL OR SLAG WOOL NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain fine hollow silicate spheres having a uniform grain size and high compressive strength by forming fine liq. droplets contg. silicate and a compressive strength increaser, allowing the droplets to gel in an expandable state, and expanding and vitrifying the gelled spheres. CONSTITUTION:Silicate and a compressive strength increaser are agitated in a liq. medium contg. a surfactant to form fine liq. droplets contg. the silicate and the increaser. The droplets are allowed to gel in an expandable state, and the gelled fine spheres are expanded at a high temp. and vitrified. It is especially preferable to use a mixture of sorbitan fatty acid ester with polyoxyethylene sorbitan fatty acid monoester as the surfactant because a stable emulsion is obtd. An org. liq. medium such as benzene, toluene, xylene, kerosene, trichloroethylene or perchloroethylene or a mixture thereof is used as the liq. medium.