C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
261/39
C04B 35/10 (2006.01) C04B 35/105 (2006.01) C04B 35/107 (2006.01) C04B 35/42 (2006.01)
Patent
CA 1108655
Abstract of the Disclosure Dense fused cast product and fused grain product of material whose microstructure consists essentially of at least 70 volume % chrome-containing corundum solid solution crystal phase, at least about 5 volume % oxidic secondary crystal phases mainly comprising chrome-containing alkaline earth hexaluminate solid solution, and less than 10 volume % metal phase. Analytical composition of material, by weight, consists essentially of at least 90% A12O3 + Cr2O3, 20-60% Cr2O3, 1-4% MO where M is Ca, Ba, Sr, Mg, Fe and mixtures thereof, 0.4-3.5% CaO, BaO, SrO and mixtures thereof, not greater than 3% MgO, not greater than 3.5% FeO, <5% SiO2, up to 0.5% fluorine, <1.5% R2O wherein R is Li, Na, K, Rb, Cs and mixtures thereof, up to 2% TiO2 and up to 3% ZrO2. Resistant to corrosion by soda-lime and borosilicate glasses. Notable electrical resistivity with SiO2 <1% by weight. -22-
327205
Brothers Jack A.
Doman Robert C.
Mcnally Robert N.
Corning Glass Works
Gowling Lafleur Henderson Llp
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