Polycrystalline Sic Electrical Devices and Methods for Fabricating the Same

a technology of polycrystalline sic and electrical devices, which is applied in the field of new electrical devices, can solve the problems of increasing the market potential of gas igniters, affecting the performance of gas igniters, and reducing the service life of standing pilot lights for many appliance types

Inactive Publication Date: 2008-10-30
COLOPY CURTIS M
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0018]A method is provided for forming polymer-ceramic composite igniter shapes that are pyrolized in supporting fixtures at temperatures as low as 650° C. in nitrogen or other inert gas atmospheres. This pyrolizing step converts the impregnated resin content to 70% to 80% silicon carbide by weight enabling a permanent S

Problems solved by technology

These standards largely led to the demise of the standing pilot light for many appliance types and greatly increased the market potential for gas igniters.
Yet despite the recognition provided to SiC hot surface igniters, certain detriments remain.
Unfortunately, despite the above-recognition, in existing SiC igniter product examples, a typical 84% to 86% SiC density corresponds to a relat

Method used

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  • Polycrystalline Sic Electrical Devices and Methods for Fabricating the Same

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Embodiment Construction

[0030]Reference will now be made in detail to the discussion supported by the accompanying illustrations. These drawings are in simplified form and are not to precise scale but are operative for assisting an understanding of the method herein. For purposes of convenience and clarity only, directional terms, such as top, bottom, up, down, over, above, and below may be used with respect to the drawings. These and similar directional terms should not be construed to limit the scope of the invention in any manner.

[0031]This invention relates to novel electrical devices, including the hot surface igniters discussed above, fabricated from polycrystalline silicon carbide (SiC) and methods for forming the same. However, it shall be recognized that as used herein a hot surface igniter is merely a representative example wherein the heating element portion is composed of silicon carbide, that the present invention is not limited thereto and has broader applications throughout the industry.

[003...

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Abstract

The present invention relates to a to novel electrical devices fabricated from polycrystalline silicon carbide (SiC) and methods for forming the same. The present invention provides a method for fabricating polycrystalline silicon carbide (SiC) products infiltrated with SiC-containing preceramic precursor resins to substantially mask the deleterious effects of trace contaminants, typically nitrogen and aluminum, while reducing operative porosity and enhancing manufacturing ease.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This Application claims priority from U.S. Prov. App. No. 60 / 734,127 filed Nov. 7, 2005, the entire contents of which are herein incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to novel electrical devices fabricated from polycrystalline silicon carbide (SiC) and methods for forming the same. More specifically, the present invention provides a method for fabricating polycrystalline silicon carbide (SiC) products infiltrated with SiC-containing preceramic precursor resins to substantially mask the deleterious effects of trace contaminants, typically nitrogen and aluminum, while reducing operative porosity and enhancing manufacturing ease.[0004]2. Description of the Related Art[0005]Prior to the advent of electric ignition controls, gas appliances and equipment were manually lit with a match or had continuously burning pilot lights. Although a few appliances still use th...

Claims

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Application Information

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IPC IPC(8): C04B35/565
CPCC04B35/571C04B35/6269C04B2235/3217C04B2235/3826C04B2235/402C04B2235/612C04B2235/616C04B2235/656C04B2235/72C04B2235/722C04B2235/762C04B2235/767C04B2235/77F23N2027/42F23N2227/42
Inventor COLOPY, CURTIS M.
Owner COLOPY CURTIS M
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