C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
25/131, 23/255,
C04B 35/46 (2006.01) B01D 39/20 (2006.01) B01J 35/06 (2006.01) B01J 35/08 (2006.01) C01G 23/047 (2006.01) C04B 35/622 (2006.01) C04B 35/624 (2006.01) D01F 9/08 (2006.01) G02B 5/128 (2006.01)
Patent
CA 1038135
ABSTRACT OF THE DISCLOSURE Solid, shaped and fired refractory articles, such as fibers and microspheres, of titanium dioxide are made by shaping, gelling and firing titanin sols. Said fibers can be made by extruding in air a viscous aqueous titania sol and heating and firing the resulting green fiber to remove water, decompose and volatilize undesired constituents and form a refractory fiber of polycrystalline titanium dioxide which is useful, for example, to form refractory fabrics or as reinforcement for composites. Said microspheres can be made by dis- persing droplets of an aqueous titania sol in an organic dehydrating liquid, separating the resulting green microspheres from the dehydrating liquid and heating and firing the green microspheres to form solid refractory microspheres of polycrystalline titanium dioxide, which are useful, for example, in reflective signs or traffic marking surfaces. Said fired fibers and microspheres are preferably transparent to visible light with the titanium dioxide content thereof in its anatose form.
194473
Lange Roger W.
Sowman Harold G.
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