Compositions: ceramic – Ceramic compositions – Refractory
501112, 501113, 501114, 501117, C04B 3503, C04B 3504, C04B 35043
A refractory is disclosed which contains integrally sintered magnesia particles forming the skeleton of the refractory and a mineral phase of magnesium orthotitanate (Mg.sub.2 TiO.sub.4) formed between the magnesia particles, thus giving an increased erosion resistance. Preferably, the refractory comprises coarse magnesia particles having an average particle diameter of at least 1 mm or a mixture of coarse magnesia particles having an average particle diameter of at least 1 mm and medium magnesia particles having an average particle diameter of 1 to 0.15 mm and 5 to 50 wt. % of magnesium orthotitanate intervening between the magnesia particles. The refractory not only has an excellent durability in a basic atmosphere, but also has a high strength because of combination of the coarse or medium magnesia particles so that it does not tend to deform and has a high durability against thermal shock.
patent: 2639993 (1953-05-01), Heuer
patent: 3540900 (1970-11-01), Guile
patent: 3632698 (1972-01-01), Crespi
patent: 4125407 (1978-11-01), Ueno
Bell Mark L.
Mitsubishi Materials Corporation
Troilo Louis M.
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