Reducing residual strain in extruded and roller ceramic plates


Large and thin ceramic plates of, particularly at least 30 X 30 cm in size and not greater than 20 mm especially not greater than 8 mm in thickness and having oriented crystals are produced by a method comprising drawing a green ceramic body from an extruder in a curved cross-sectional shape, cutting and spreading the green body in a plate form, rolling the plates in the same direction as that of drawing, subjecting the rolled plates to treatment with far infrared rays or high-frequency heating before the plates contain a moisture reduced to less than 15 % by weight while the plates are transferred in the same direction as that of drawing, drying the plates thus treated while the plates are further transferred in the same direction, and then firing the plates in a kiln. The ceramic plates are large and thin but nevertheless easy to handle, and have a bending strength in the direction of drawing, of 1.2 to 2 times that in the perpendicular direction. <IMAGE>




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Cited By (2)

    Publication numberPublication dateAssigneeTitle
    EP-0242503-A2October 28, 1987IG-Technical Research Inc.Continuous elongate ceramic article manufacturing system
    EP-0242503-A3July 26, 1989Ig-Technical Research Inc.Continuous elongate ceramic article manufacturing system