F - Mech Eng,Light,Heat,Weapons – 01 – N
Patent
F - Mech Eng,Light,Heat,Weapons
01
N
F01N 3/28 (2006.01) F01N 13/14 (2010.01) B01D 53/88 (2006.01) C04B 35/622 (2006.01) F01N 13/08 (2010.01) F01N 7/14 (2006.01) F01N 7/08 (2006.01)
Patent
CA 2095777
A catalytic converter has a metallic monolith that is mounted in a canister by a heat-insulating mat of melt-formed refractory ceramic fibers that have been annealed to provide a Resiliency Value of at least 10 kPa. Previously known melt-blown fibers used in such mats were thought to require a fine-grained crystalline structure to have a higher resiliency value. However, a mat in accordance with the invention having a Resiliency Value of at least 10 does not take a compression set that would allow the monolith to become loose, is made from ceramic fibers which are preferably melt-formed from a mixture of about equal parts by weight of Al2O3 and SiO2. After being annealed, the ceramic fibers can have a fine-grained crystalline structure, but significant energy savings can be realized by reducing the annealing temperatures and times such that the fibers have an amorphous structure while still attaining excellent Resiliency Values.
Minnesota Mining And Manufacturing Company
Smart & Biggar
LandOfFree
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