Saint-gobain Ceramics & Plastics, Inc.

Norton Company

Saint-gobain/norton Industrial Ceramics Corporation

Normand P Arsenault

Craig A Willkens

Roger J Lin

James Olson

Stephen D Hartline

Sebastien R Bardon

Francis A Jurnak

Sebastien Bardon

This invention relates to an aging resistant SiC igniter having a second layer of recrystallized SiC within the body.

Aging resistant, porous silicon Carbide ceramic igniter

The present invention relates to ceramic igniter devices, and more particularly, to such devices that contain two or more segregated hot zone regions that are electrically connected such as in series or in parallel. These devices are suitably incorporated in a variety of devices, including diesel fuel filters.

Multiple hot zone igniters

Aging resistant porous silicon carbide ceramic igniter

A method for forming thin green ceramic igniter shapes having a thickness characterized by a tolerance of no more than about +/-0.001 inch includes providing an apparatus having a porous mold having a well which defines a pair of opposing porous walls, and a plurality of vertical dividers positioned in the well in substantially parallel, substantially spaced relation where each divider contacting each opposing wall to define a plurality of compartments. A ceramic slip formed from a ceramic powder and a liquid carrier is poured into the compartments of the apparatus, dewatered through the opposing porous walls to form a plurality of green ceramic igniter shapes. The plurality of green ceramic igniter shapes are removed from the plurality of compartments.

Method of forming ceramic igniters

An improved process of preparing silicon nitride by the direct nitridation of silicon metal is disclosed. The process is a multi-step one which is substantially more efficient than prior processes and produces a silicon nitride having an oxygen content of less than 1%, a silicon metal content of less than 0.5%, and an alpha phase content of at least 85%, preferably at least 90%. The silicon nitride may be converted to a powder.

Silicon nitride vacuum furnace process

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Holden, MA, United States of America

Normand P Arsenault