Pulverulent borosilicate composition and a method of making a ce

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

1977-08-18

1978-08-01

McCarthy, Helen M.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

65 22, 106 40R, 106 54, 106 734, 106 735, C03B 100

Patent

active

041040740

ABSTRACT:
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 thereafter 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 calcination. The calcined mixture is introduced into a crusher, such as 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.

REFERENCES:
patent: 1676331 (1928-07-01), Hochstein
patent: 2239551 (1941-04-01), Dalton et al.
patent: 3623897 (1971-11-01), Wojcik
patent: 3759683 (1973-09-01), Dislich et al.
patent: 3793039 (1974-02-01), Rostoker
patent: 3892580 (1975-07-01), Messing
patent: 3979215 (1976-09-01), Embuem et al.

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