Method of preparing beta alkaline alumina parts

Details Method of preparing beta alkaline alumina parts Method of preparing beta alkaline alumina parts

1976-11-11

1979-01-30

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 65, 429191, 429193, C04B 3510

Patent

active

041372875

ABSTRACT:
The invention relates to a method of preparing beta alkaline alumina parts particularly for use as solid electrolytes in electric cells of the sodium-sulphur type. It consists in mixing alumina and an alkaline carbonate in predetermined quantities, heating the mixture, crushing after cooling, forming the parts, sintering them and, after said forming, but prior to sintering depositing a layer of a compound of said alkaline metal on the surface of the parts in contact with the atmosphere to create an atmosphere rich in sodium in the immediate vicinity of the parts during sintering for compensating any loss of the element which may occur from the parts and minimizing the loss of alkaline metal by diffusion towards the outside of the parts.

REFERENCES:
patent: 3520054 (1970-07-01), Pensack et al.
patent: 3625773 (1971-12-01), Charles et al.
patent: 4056589 (1977-11-01), Lingscheit
patent: 4068048 (1978-01-01), Desplanches et al.

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