Preparation of sintered zirconia body

Details Preparation of sintered zirconia body Preparation of sintered zirconia body

1994-11-17

1997-04-15

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

264 56, 264 61, C04B 3548

Patent

active

056206372

ABSTRACT:
A sintered zirconia sheet is prepared by firing a green sheet of zirconia while placing at least one weight on the sheet to apply a load thereto. Preferably a weight made of a porous material having a porosity of 5 to 30% and having a weight per unit area W (g/cm.sup.2) and a surface area S (cm.sup.2) is placed on the sheet to apply a load per unit area G (g/cm.sup.2) to the sheet under the conditions: S.ltoreq.200, G.ltoreq.5, and W/G.gtoreq.0.5. Sintered zirconia sheets free of camber, distortion or cracking are obtained, particularly when their dimensions are at least 15 cm.times.15 cm and up to 0.5 mm thick.

REFERENCES:
patent: 3879509 (1975-04-01), Elderbaum
patent: 4340436 (1982-07-01), Dubetsky
patent: 4849142 (1989-07-01), Panda et al.
patent: 5130067 (1992-07-01), Flaitz
patent: 5194196 (1993-03-01), Chance

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