Ceramic article, ceramic extrudate and related articles

Abstract

A ceramic article is provided. The ceramic article includes a ceramic tube comprising a sintered helical tape. The sintered helical tape has adjacent windings, which are joined together. Another aspect provides an article comprising a ceramic extrudate having an outer surface and a pattern of surface features along the outer surface.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) BACKGROUND [0001] 1. Field of the Disclosure [0002] The following is directed generally toward ceramic articles. Particularly, the following is directed towards extruded ceramic articles which may find use in burner applications [0003] 2. Description of the Related Art [0004] Ceramics are a robust material capable of various applications, for example, superconductors, semiconductors, abrasives, cookware, and electrical and thermal insulators. Superconducting and semiconducting ceramics are modern ceramic materials characterized by their unique electrical properties and involved processing requirements. Traditional ceramics, such as insulating ceramics, are generally characterized by strong and brittle fired bodies capable of thermal and electrical insulating properties far superior to metals or polymers. Traditional ceramics comprise a mixture of inorganic materials that, upon firing, creates a chemically inert and stable body, making tradit...

AI Technical Summary

Problems solved by technology

However, because of the brittle nature of the sintered traditional ceramic material, post processing mechanical alterations and manipulations of the ceramic body are very limited.

A sintered ceramic cannot be subject to high, post-firing strains, otherwise the entire ceramic pieces will fail.

This drawback has limited the use of traditional ceramics in creating, for example, a more efficient burner.

The drawback with metal burners is that they are typically incapable of withstanding high temperatures and are susceptible to corrosion.

However, a problem with such burners is that given the nature of producing reticulated ceramics through a foam loss process or weaving of ceramic fibers to create a high-porosity structure, the consistency and uniformity of pore size are lost or at least difficult to control.

The remaining reticulated ceramic is a high porosity structure, but the consistency and uniformity of the pores is poor.

The same problem exists for weaving of fibers of SiC or SiN.

The entanglement of the fibers creates a high porosity ceramic, but the consistency and uniformity of the pores is poor.

The inconsistent pore size and spacing makes for inefficient and unequal distribution of infrared radiation and makes the burner less efficient.

Furthermore, the attachment of the ceramic sheath to the stainless tubes is difficult.

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