Alumina fiber aggregate, process for producing the same, and use thereof
US8273816B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2008 |
| Grant date | Sep 25, 2012 |
| Priority date | — |
| Expiry date | Aug 7, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/5264
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An object of the invention is to provide an alumina fiber aggregate which, when used as a filler in various materials such as, e.g., resins, coating materials, metals, and ceramics, enables the mixtures to have reduced viscosity and thereby heightens the productivity of products containing alumina fibers, and which enables cured thermosetting resins to have a sufficiently heightened thermal conductivity.This alumina fiber aggregate, 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 fibrous mass comprises 70-100% by mass of Al2O3 and 0-30% by mass of SiO2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.