Compositions: ceramic – Ceramic compositions – Refractory
Patent
1994-04-14
1995-04-04
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
Refractory
501100, 501128, 501133, 501153, 501154, 222591, 266266, C04B 3548
Patent
active
054037948
ABSTRACT:
A refractory article such as a slide gate plate, well block nozzle or like refractory component used in continuous casting of chemically aggressive grades of steel is made from a mixture containing about 50-85 wt. % alumina; about 5-30 wt. % alumina-zirconia fused grain; about 3-10 wt. % zirconia; and about 3-10 wt. % silica, plus an effective amount of binder materials to permit extrusion, pressing or like forming process. The pressed shape is fired in an air atmosphere at temperatures in excess of 1000.degree. C. to form an oxide bond. The composition of the fired material comprises about 60-90 wt. % alumina; about 5-30 wt. % zirconia; and about 3-10 wt. % silica. The fired article exhibits excellent hot strength and is resistant to thermal shock and resistant to the erosive and corrosive effects of molten steel, including aggressive, high manganese and calcium treated grades.
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Yokoyama et al., "Effect of Fused Al.sub.2 O.sub.3 -ZrO.sub.2 on Properties of Sliding Nozzle Plate", UNITECR '93 Congress, pp. 1076-1086 (Date unknown).
Morris Martin
Wagner Robert J.
Bell Mark L.
Marcheschi Michael
Vesuvius Crucible Company
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