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US 7,691,319 B2Granted
Method of manufacturing porous body
AssigneeNGK Insulators, Ltd.
InventorKatsuhiro Inoue
Life of this patent
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Abstract
A method of manufacturing a porous body having a high open porosity and a small thermal expansion coefficient is provided. In the manufacturing method, a raw material including an aluminum source and a titanium source is fired to obtain the porous body containing aluminum titanate as a main component, and inorganic microballoons containing an aluminum component and/or a silicon component are used as a pore former.
Claims1
A method of manufacturing a porous body, comprising firing a raw material including an aluminum source and a titanium source to obtain the porous body containing aluminum titanate as a main component;
- wherein the raw material includes inorganic microballoons containing at least one of an aluminum component and a silicon component, and a total content of the aluminum component and the silicon component in the inorganic microballoons is 90 mass % or more in terms of Al2O3 and SiO2, respectively;
- and
- wherein the inorganic microballoons contain at least one of a sodium component and a potassium component, wherein a total content of the sodium component and the potassium component in the inorganic microballoons is more than 2.0 mass % up to and including 8.0 mass % in terms of Na2O and K2O, respectively, and wherein a melting point of the inorganic microballoons is in a range of 1100° C. to 1350° C.
Dependencies are inferred from the claim text.