Method of preparing crack-free monolithic polycrystalline cordie

Details Method of preparing crack-free monolithic polycrystalline cordie Method of preparing crack-free monolithic polycrystalline cordie

1974-05-28

1977-01-04

Douglas, Winston A.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 40R, 106 68, 423118, 4232135, 423328, C04B 3504, C04B 3300, C04B 3514, C01F 100

Patent

active

040010287

ABSTRACT:
Cracking of large monolithic cordierite segments and in particular monolithic honeycombed substrates having a matrix of thin walls forming a multiplicity of open ended cells extending from one end of the substrate to the other end is reduced or eliminated by limiting the amount of raw clay used in formulating the clay-talc-alumina raw material batch. The raw clay may be eliminated entirely but is preferably at least 10% of the whole batch and not more than 31% of the whole batch with the balance of the clay constituent to the raw material batch being calcined clay. The raw material batch is preferably formulated to yield at least 90% cordierite phase upon reaction during sintering.

REFERENCES:
patent: 2731355 (1956-01-01), Skinner
patent: 2786772 (1957-03-01), Stewart et al.
patent: 2864919 (1958-12-01), Stringfellow
patent: 3026212 (1962-03-01), Fay et al.
patent: 3146115 (1964-08-01), Wishon et al.
patent: 3389001 (1968-06-01), Blackburn et al.
patent: 3473999 (1969-10-01), Muchow

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