ALUMINA FIBER AND ALUMINA FIBER AGGREGATE
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United States of America Patent
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Dec 10, 2015
app pub date -
Jan 23, 2014
filing date -
Jan 23, 2013
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Abstract
There is provided an alumina fiber capable of fixing a honeycomb carrier while maintaining elasticity for a long period of time even in a severe usage environment, and an alumina fiber aggregate formed of the fiber. Problems in a gripping material of an automotive honeycomb carrier are solved by applying an alumina fiber containing from 70 to 98% by mass of alumina and from 2 to 30% by mass of silica, having an average fiber diameter of from 3.0 to 8.0 μm, a ratio of fibers having a fiber diameter exceeding 10 μm being 5% or less in terms of the number of fibers and a size of a mullite crystallite contained in each fiber of from 10 to 1500 Å, and by forming an alumina fiber aggregate by using the fibers.
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