Pulverulent borosilicate composition and a method of making...

Details Pulverulent borosilicate composition and a method of making... Pulverulent borosilicate composition and a method of making...

C - Chemistry, Metallurgy

03

C

261/19, 261/2

C03C 3/091 (2006.01) C03C 11/00 (2006.01) C03C 12/00 (2006.01)

Patent

CA 1084533

TITLE A PULVERULENT BOROSILICATE COMPOSITION AND A METHOD OF MAKING A CELLULAR BOROSILICATE BODY THEREFROM ABSTRACT OF THE DISCLOSURE An aqueous slurry comprising an intimate mixture of colloidal silica, (preferably an amorphous, precipitated, hydrated silica), caustic potash, boric acid and alumina is first prepared and then dried. The dried aggregates are there- after crushed, calcined and rapidly quenched. It is preferred to dry the slurry in a spray drier and thereafter omit crushing after drying and to calcine the dried admixture by means of a plasma arc so that the mixture is rapidly quenched after calcina- tion. The calcined mixture is introduced into a crusher, such as a ball mill, with a carbonaceous cellulating agent and reduced to a fine pulverulent material. The pulverulent material is then cellulated in a cellulating furnace to form cellular borosilicate bodies. Where desired, the calcined material may be utilized as a ceramic frit.

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