Method for producing a silicon nitride filter

Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Of inorganic materials

Reexamination Certificate

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C264S042000, C264S043000

Reexamination Certificate

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06838026

ABSTRACT:
A method for producing a silicon nitride filter by heat-treating in nitrogen green body of from 35 to 90 mass % of silicon nitride particles having an average particle diameter of from 1 to 30 μm, from 5 to 60 mass % of a pore-forming agent and from 0.1 to 5 mass % of metal oxide particles, provided that the total amount of the silicon nitride particle , the pore-forming agent and the metal oxide particles is at least 90 mass %, to form a porous product.

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patent: 0 712 820 (1996-05-01), None

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