Inorganic fiber
AssigneeUnifrax I LLC
InventorsBruce K. Zoitos, Michael J. Andrejcak
Life of this patent
Estimating the term…
Abstract
An inorganic fiber containing silica and magnesia as the major fiber components and which further includes an intended iron oxide additive to improve the dimensional stability of the fiber. The inorganic fiber exhibits good thermal insulation performance at 1400° C. and greater, retains mechanical integrity after exposure to the use temperature, and which remains non-durable in physiological fluids. Also provided are thermal insulation product forms comprising a plurality of the inorganic fibers, methods of preparing the inorganic fiber and of thermally insulating articles using thermal insulation prepared from a plurality of the inorganic fibers.
Claims30
An inorganic fiber comprising the fiberization product of 70 or greater weight percent silica, magnesia, greater than 0 to about 10 weight percent iron oxide, measured as Fe2O3, and greater than 0 to about 4 weight percent alumina, wherein said inorganic fiber exhibits a shrinkage of 10% or less at 1400° C.
A method for preparing the inorganic fiber exhibiting a shrinkage of 10% or less at 1400° C. comprising:
- forming a melt with ingredients comprising 70 or greater weight percent silica, magnesia, greater than 0 to about 10 weight percent iron oxide, measured as Fe2O3, and greater than 0 to about 4 weight percent alumina;
- and
- producing fibers from the melt.
An inorganic fiber comprising the fiberization product of about 65 to about 86 weight percent silica, about 14 to about 35 weight percent magnesia, greater than 0 to about 10 weight percent iron oxide, measured as Fe2O3, and greater than 0 to about 4 weight percent alumina, wherein the fiber has an average fiber diameter of 4 microns and greater, and wherein said inorganic fiber exhibits a shrinkage of 5% or less at 1400° C.
Dependencies are inferred from the claim text.