Carbide nanofibrils and method of making same
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0841493
(2007-08-20)
|
등록번호 |
US7862790
(2010-12-20)
|
발명자
/ 주소 |
- Moy, David
- Niu, Chun-Ming
|
출원인 / 주소 |
- Hyperion Catalysis Internationl, Inc.
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
15 |
초록
▼
A plurality of carbide, such as silicon carbide, tungsten carbide, etc., nanofibrils predominantly having diameters substantially less than about 100 nm and a method for making such carbide nanofibrils. The method includes the steps of: heating a plurality of carbon nanotubes or nanofibrils predomin
A plurality of carbide, such as silicon carbide, tungsten carbide, etc., nanofibrils predominantly having diameters substantially less than about 100 nm and a method for making such carbide nanofibrils. The method includes the steps of: heating a plurality of carbon nanotubes or nanofibrils predominantly having diameters less than about 50 nm in a reaction chamber in the presence of a gas of the form QnAm, where Q is a metal capable of forming a carbide, A is an element or radical and n and m are integers necessary to satisfy valences, such as, for example silicon monoxide, and an inert gas in a reaction vessel to a temperature substantially less than 1700 C but sufficently high to cause substantial reaction of the metal in the gas with the carbon of said carbon nanotubes or nanofibrils to form, in situ, solid carbide nanofibrils, the temperature being sufficiently low to prevent substantial fusing together of individidual ones of said carbide nanofibrils, removing at least a portion of A-based gas from said reaction chamber as said reaction progresses, and maintaining said temperature until substantially all the carbon of said nanotubes or nanofibrils has been converted into Q-based carbide.
대표청구항
▼
We claim: 1. A method of making a plurality of Q-based carbide nanofibrils predominantly having diameters substantially less than about 100 nm, comprising the steps of:heating a plurality of carbon nanotubes or nanofibrils predominantly having diameters less than about 50 nm in a reaction chamber in
We claim: 1. A method of making a plurality of Q-based carbide nanofibrils predominantly having diameters substantially less than about 100 nm, comprising the steps of:heating a plurality of carbon nanotubes or nanofibrils predominantly having diameters less than about 50 nm in a reaction chamber in the presence of a Q-based gas of the form QnAm, where A is an element or radical, Q is an element selected from the group consisting of boron, titanium, tantalum, niobium, zirconium, halfnium, molybdenum and tungsten, and n and m are integers necessary to satisfy valences, and an inert gas in a reaction vessel to a temperature substantially less than 1700° C. but sufficiently high to cause substantial reaction of said Q-based gas with the carbon of said carbon nanotubes or nanofibrils to form, in situ, solid Q-based carbide nanofibrils and a A-based gas, said temperature being sufficiently low to prevent substantial fusing together of individual ones of said carbide nanofibrils,removing at least a portion of said A-based gas from said reaction chamber as said reaction progresses, andmaintaining said temperature until substantially all the carbon of said nanotubes or nanofibrils has been converted into Q-based carbide nanofibrils wherein the increased diameter of said carbide nanofibrils is no more than about double that of the carbon nanotubes or nanofibrils from which they were made.
이 특허에 인용된 특허 (15)
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Cohen Marvin Lou ; Zettl Alexander Karlwalter, BX CY NZ nanotubes and nanoparticles.
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Moy, David; Niu, Chunming; Ma, Jun; Willey, James M., Carbide and oxycarbide based compositions, rigid porous structures including the same, methods of making and using the same.
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Snyder Carl ; Mandeville W. Harry ; Tennent Howard G. ; Truesdale Larry K. ; Barber James J., Carbon fibrils.
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Tennent Howard G. (Kennett Square PA) Barber James J. (Arlington MA) Hoch Robert (Middle Village NY), Carbon fibrils and method for producing same.
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Tennent Howard G. (Kennett Square PA), Carbon fibrils, method for producing same and compositions containing same.
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Tennent Howard G. (Kennett Square PA), Carbon fibrils, method for producing same, and encapsulated catalyst.
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Mandeville W. Harry (Lynnfield MA) Truesdale Larry K. (N. Andover MA) Tennent Howard (Kennett Square PA), Fibrils.
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Wei George C. (Oak Ridge TN), Method for forming fibrous silicon carbide insulating material.
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Endou Morinobu (Nagano JPX) Takamizawa Minoru (Tokyo JPX) Hongu Tatsuhiko (Kanagawa JPX) Kobayashi Taishi (Niigata JPX), Method for the preparation of silicon carbide fibers.
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Fisher Alan ; Hoch Robert ; Moy David ; Niu Chunming ; Ogata Naoya,JPX ; Tennent Howard ; McCarthy Thomas, Method of making functionalized nanotubes.
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Nadkarni Sadashiv K. (Jonquiere CAX) Jain Mukesh K. (Jonquiere CAX), Method of preparing whiskers of silicon carbide and other materials.
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Suzuki Hiroshige (39-9 ; Kitasenzoku 2-chome Ota-ku ; Tokyo 145 JPX) Hase Teizo (Kawasaki JPX), Method of producing
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