Invention Grant
- Patent Title: Composite hollow ceramic fibers, precursors for, methods of making the same, and methods of using the same
- Patent Title (中): 复合中空陶瓷纤维，其前体，制造方法及其使用方法
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Application No.: US13174682Application Date: 2011-06-30
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Publication No.: US08747525B2Publication Date: 2014-06-10
- Inventor: Dean W. Kratzer , Tao Li , Madhava R. Kosuri
- Applicant: Dean W. Kratzer , Tao Li , Madhava R. Kosuri
- Applicant Address: FR Paris
- Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
- Current Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
- Current Assignee Address: FR Paris
- Agent Christopher J. Cronin
- Main IPC: B01D69/08
- IPC: B01D69/08 ; B01D53/22 ; B01D71/02 ; B28B3/20
Abstract:
A composite hollow ceramic fiber includes a porous hollow core supporting a thin, dense sheath. The non-gas-tight core comprises a first ceramic compound and an interconnecting network of pores. The gas-tight sheath comprises a second ceramic compound. The fiber is made by extruding first and second suspensions of the first and second ceramic compounds in polymeric binders and solvent from a spinnerette and coagulating the nascent hollow fiber to effect phase inversion of the polymeric binders. The resultant green fiber is sintered in a two step process. First, the binder is burned off. Second, the sheath is densified and the second ceramic compound is sinter without fully sintering the first ceramic compound. The first ceramic compound has a melting point higher than that of the second ceramic compound.
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