| abstract |
The present invention provides a method for producing a silicon nitride filter, characterized by heat-treating in nitrogen a green body comprising from 40 to 90 % of metal silicon particles having an average particle diameter of from 1 to 200 µm and from 10 to 60 % of a pore-forming agent, provided that the total amount of the metal silicon particles and the pore-forming agent is at least 90 %, to form a porous product made substantially of silicon nitride. |