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Iman Nazeni
Bag. Kimia Teknik, Inst. Teknol. Bandung
Astronomy Chemistry Earth & Planetary Sciences Mathematics Physics

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The System of Gelled Foam of Clay-in-water Suspension for the Preparation of Lightweight Insulating Refractory: Part I. Formation and Gelling of Clay-Based Foam Iman Nazeni
Journal of Mathematical and Fundamental Sciences Vol. 1 No. 2 (1961)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract

Under neutral conditions colloidal plates of clay in water are negatively charged. When the pH of the clay-in-water dispersion is lowered slightly, positive charges can develop on the edges of the clay plates giving rise to an edge-to-face type gelation. Sodium fluosilicate, which has a rather high acidity and which is very slightly soluble in water, can be used as gelling agent. By beating a clay slip containing, a surfaceactive agent "Teepool" and sodium fluosilicate, one can obtain a stable foam followed by formation of a firm gel. When then the wet gel is dried a solid foam product is built up.
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