Galaj Stanislas (Arcueil FRX) Besland Marie-Paule (Saintonge FRX) Wicker Alain (Paris FRX) Gillot Jacques (LaLoubere FRX) Soria Raymond (Bazet FRX)
출원인 / 주소
Societe des Ceramiques Techniques (Bazet FRX 03)
인용정보
피인용 횟수 :
8인용 특허 :
0
초록▼
The fiter membrane comprises a porous structure made of a material selected from sintered ceramics, sintered metals, microporous carbon, and microporous glass, and is characterized by the fact that its entire external surface, including the inside surface of the pores in the structure, is covered wi
The fiter membrane comprises a porous structure made of a material selected from sintered ceramics, sintered metals, microporous carbon, and microporous glass, and is characterized by the fact that its entire external surface, including the inside surface of the pores in the structure, is covered with a thin and continuous film of carbon or of an oxide. In a sintered aluminum membrane, the surfaces of pores are coated with a dense and continuous thin layer of zirconia which prevents the surfaces from being degraded in service. In the figure, curve 3 shows how the throughput of a membrane without a zirconia layer falls off over time, while curve 4 shows little change in the same membrane having such a layer.
대표청구항▼
A method of manufacturing a membrane comprising forming a porous structure made of a material selected from sintered ceramics and sintered metals, and forming on said structure grains which are fixed one to another by bonded portions of their surfaces leaving pores therebetween delimited by the rema
A method of manufacturing a membrane comprising forming a porous structure made of a material selected from sintered ceramics and sintered metals, and forming on said structure grains which are fixed one to another by bonded portions of their surfaces leaving pores therebetween delimited by the remaining exposed portions of the surfaces of the said grains, wherein the entire exposed portions of the surfaces of the grains including the surface inside the pores of the porous structure are covered with a thin and continuous film of an oxide selected from the group consisting of ZrO2, MgO, Al2O3, SiO2, TiO2, Cr2O3, MnO, Fe2O3, CoO, NiO, CuO, ZnO, Ga2O3, GeO2, TlO2, Nb2O5, MoO3, RuO2, PdO, CdO, SnO2, La2O3, HfO2, Ta2O5, WO3, PbO2, Ce2O3, and Bi2O3, alone or in combination, or in mixture with B2O3, BaO, or CaO, wherein the thickness of said film lies between 2 nm and 1000 nm, wherein the average pore diameter of the surface layer of said structure lies between 0.02 microns and 15 microns, the porosity of the membrane being then substantially that of the initial porous structure.
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