Patent · US Active

Alumina fiber aggregate, process for producing the same, and use thereof

US8383714B2 · kind B2 · utility

0Cited by

2References

8Claims

0Family size

Assignee

DENKI KAGAKU KOGYO KABUSHIKI KAISHA · JP

Inventors

Yasutaka Ohshima · Tokyo, JP
Isamu Hirano · Tokyo, JP
Takayuki Higuchi · Osaka, JP

Key dates

Filing date	Aug 24, 2012
Grant date	Feb 26, 2013
Priority date	—
Expiry date	Aug 24, 2032

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B2235/5264
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A process for producing the alumina fiber aggregate which, when examined by the electron microscope method, gives a frequency distribution regarding number of fibers, wherein the number of fibers having a fiber length of 50-200 μm is 70% or more (including 100%), the number of fibers having a fiber length smaller than 50 μm is 30% or less (including 0), the number of fibers of 50-100 μm is 30-50%, the number of fibers longer than 100 μm but not longer than 200 μm is 30-50%, and the number of fibers longer than 200 μm is 20% or less (including 0). The process including the steps of grinding cottony alumina-based fibers comprising 70-100% by mass of Al2O3 and 0-30% by mass of SiO2 while applying a pressure of 0.1-20 MPa thereto and then classifying the ground fibers.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.