The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 21, 2011
Filed:
Nov. 16, 2005
Masaki Sugimoto, Naka-gun, JP;
Akira Idesaki, Naka-gun, JP;
Masaki Sugimoto, Naka-gun, JP;
Akira Idesaki, Naka-gun, JP;
Japan Atomic Energy Agency, Ibaraki, JP;
Abstract
An improved process for producing a silicon carbide ceramic micro tubes (SiC micro tube) from a silicon-based polymer fiber by applying an ionizing radiation such that the surface part of the fiber selectively undergoes oxidative crosslinking, extracting the uncrosslinked core part of the fiber with an organic solvent to form a hollow fiber, and firing it in an inert gas is characterized by using a polymer blend of polycarbosilane and polyvinylsilane as the silicon polymer or applying the ionizing radiation to the silicon-based polymer fiber as it is cooled. The two methods may be performed either individually or in combination to produce tubes with their wall thickness controlled at a desired value in the range of 2-10 μm although this has been impossible to achieve in the prior art.