Method for production of silicon nitride filter

A method for the production of a silicon nitride filter includes heat treating in nitrogen a green body containing from 40 to 90% of metal silicon particles having an average particle size of from 1 to 200 mum and from 10 to 60% of a pore forming agent. The green body contains at least 90% of the me...

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Bibliographic Details
Main Authors TAKAHASHI HIDEO, MIYAKAWA NAOMICHI, SHINOHARA NOBUHIRO, ARAI KANJI
Format Patent
LanguageEnglish
Published 20.05.2003
Edition7
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
REFRACTORIES
SEPARATION
SLAG
TRANSPORTING
TREATMENT OF NATURAL STONE
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Summary:A method for the production of a silicon nitride filter includes heat treating in nitrogen a green body containing from 40 to 90% of metal silicon particles having an average particle size of from 1 to 200 mum and from 10 to 60% of a pore forming agent. The green body contains at least 90% of the metal silicon particles and the pore forming agent and forms a porous product. The filter is excellent in heat resistance, corrosion resistance, acid resistance and mechanical strength and suitable for dust arresting or dust removing and is particularly suitable as a filter for particulates. The porosity of the silicon nitride filter is from 40 to 70% and the cumulative pore volume of pores with diameters of at most 1 mum is from 1 to 15 vol % of the total pore volume.
Bibliography:Application Number: US20010935666