Porous ceramic thin film and method for production thereof
AssigneeAgency of Industrial Science & Technology, Ministry of International Trade & Industry
InventorsKazumi Kato, Hiroshi Taoda
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Abstract
A porous ceramic film having micropores of uniform diameter is formed on a substrate by depositing on the substrate a layer of a ceramic sol containing polyethylene glycol or polyethylene oxide and then heating the substrate. This porous ceramic film is used as a catalyst or catalyst support. When the ceramic of this film is titanium oxide, the film is particularly useful as a photocatalyst for the decomposition of harmful and malodorous substances.
Claims13
A method for producing a ceramic film containing micropores of uniform diameter on a substrate, comprising:
- a. hydrolyzing a metal alkoxide in the presence of at least one alcohol amine to produce a ceramic sol, wherein the metal is at least one selected from the group consisting of Al, B, Ba, Ca, Cd, Ce, Co, Cr, Cu, Fe, Ge, Hf, In, Li, Mg, Mn, Mo, Nb, Ni, P, Pb, Ru, Si, Sn, Sr, Ta, Ti, V, W, Y, and Zr;
- b. adding at least one member selected from the group consisting of polyethylene glycol and polyethylene oxide to the ceramic sol;
- c. depositing the resultant ceramic sol on said substrate;
- and
- d. heating the resultant substrate.
A method for producing a ceramic film containing micropores of uniform diameter on a substrate, comprising:
- a. hydrolyzing a metal alkoxide in the presence of at least one alcohol amine to produce a ceramic sol;
- b. adding at least one member selected from the group consisting of polyethylene glycol and polyethylene oxide to the ceramic sol;
- c. depositing the resultant ceramic sol on said substrate;
- and
- d. heating the resultant substrate, wherein said ceramic sol is a titania sol and said heating of said ceramic sol is conducted by elevation of temperature from normal room temperature to a temperature in the range of from 600° C. to 700° C.
Dependencies are inferred from the claim text.