Compositions: ceramic – Ceramic compositions – Refractory
Patent
1989-10-31
1992-08-04
Dixon, Jr., William R.
Compositions: ceramic
Ceramic compositions
Refractory
501113, 501127, 501153, 501121, 106692, C04B 3510
Patent
active
051358964
ABSTRACT:
A high alumina ceramic composition has controlled small amounts of MgO and CaO. When refractories made from the composition are fired, the alumina and MgO react to form spinel. The CaO promotes such reaction while minimizing undesirable expansion, and results in a refractory having significantly improved hot strength and other desirable physical properties.
REFERENCES:
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patent: 3567472 (1968-03-01), Bratton
patent: 4002483 (1977-01-01), Daugherty et al.
patent: 4039343 (1977-08-01), Stein et al.
patent: 4729974 (1988-03-01), Nazirizadeh et al.
patent: 4735925 (1988-04-01), Kato et al.
Introduction to Ceramics Kingery et al., 2nd Edition (1976) p. 542, John Wiley & Sons.
"Alumina as a Ceramic Material" Gitzen (Feb. 1971) American Ceramic Society Publication, pp. 130-134.
Chemical Abstract-DD111672 (Mar. 5, 1975), Germany, "High Alumina Cement Containing Magnesium Aluminate Spinel" Jung (assignee).
Chemical Abstract-BE898008 Anseau et al. (Feb. 15, 1984), "Polyphase Ceramic Compositions . . . , for Prod. Containing Zirconia and Mullite".
Dixon Jr. William R.
Marcantoni Paul
North American Refractories Company
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