Preheat indicator

Details Preheat indicator Preheat indicator

G - Physics

01

N

39/111, 150/26,

G01N 33/20 (2006.01) B01D 39/00 (2006.01) B01D 39/20 (2006.01) B22C 9/08 (2006.01) B22D 2/00 (2006.01) B22D 43/00 (2006.01) C04B 35/01 (2006.01) C22B 9/02 (2006.01) C22B 21/06 (2006.01) G01K 11/00 (2006.01) G01N 25/22 (2006.01)

Patent

CA 2028435

89-358 ABSTRACT OF THE DISCLOSURE The present invention relates to a ceramic body suitable for use in molten metal filtration applications having a built-in preheat indicator and method for forming such a ceramic body. The preheat indicator comprises a dye having a burnoff temperature substantially equal to the desired preheat temperature applied to a surface of the ceramic body. In a preferred embodiment, the dye comprises an aniline dye such as Backmeier's crystal violet.

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