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Ceramic heating elements

A heating element and ceramic heating technology, applied in the field of ceramic heating elements, can solve problems such as electrical failures

Inactive Publication Date: 2009-08-19
SAINT GOBAIN CERAMICS & PLASTICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But many traditional igniters cannot consistently meet these requirements
For example, current ceramic igniters are also subject to electrical failure during use

Method used

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  • Ceramic heating elements
  • Ceramic heating elements
  • Ceramic heating elements

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Example 1: Fabrication of a heating element

[0091] like figure 2 The heating element of the present invention of the general structure shown in the accompanying drawing can be prepared as follows:

[0092] The conductive composition (30% by volume of MoSi 2 , 20 volume percent SiC, and the balance Al 2 o 3 ) powder and insulating composition (20% by volume of SiC and 80% by volume of Al 2 o 3 ) powder was mixed with 16wt% water and 5wt% methylcellulose (Dow A4M) respectively to obtain two kinds of pastes. Both pastes were formed into rods, the insulating paste into about 40 rod elements and the resistive paste into about 5 elements separated by insulating rods. These encapsulated rods were then extruded and shrunk with a Mohr piston extruder through a 0.31 inch diameter die to provide cylindrical heating elements.

[0093] After the replication process, the diameter of the conductive rods was reduced to about 0.05 inches, allowing the two conductive rods to fo...

Embodiment 2

[0097] Example 2: Coaxial Heating Element

[0098] equivalent to Figure 5 A heating element of the construction of the accompanying drawings was prepared by the general procedure of Example 1 above.

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Abstract

In one aspect, ceramic resistive heating elements are provided that comprise three or more electrically segregated conductive zones. In another aspect, ceramic heating elements are provided that comprise a plurality of conductive zones, wherein only a portion of the conductive zones pass current during use of the heating element. In a further aspect, heating elements of the invention can be readily modified to operate at a variety of voltages. The multiple conductive zones can provide extended heating element operating lifetimes.

Description

[0001] This application claims the benefit of US Provisional Application No. 60 / 799,218, filed May 9, 2006, which is incorporated herein by reference in its entirety. 【Technical field】 [0002] In one aspect, the present invention provides a novel ceramic resistive heating element comprising a plurality of conductive regions, particularly three or more conductive regions or conductive pathways. In another aspect, the present invention provides a ceramic heating element that includes a plurality of conductive regions, wherein only a portion of the conductive regions have current flow through them during use of the heating element. The preferred heating elements of the present invention can also be easily modified to operate at different voltages. 【Background technique】 [0003] Ceramic materials have had great success in igniters such as gas stoves, ovens and clothes dryers. The manufacture of ceramic igniters involves building an electrical circuit through the ceramic compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/10
CPCH05B2203/027H05B2203/018F27D99/0006H05B3/141F23Q7/22H05B3/00H01B1/18C03B37/04
Inventor C·A·维尔肯丝
Owner SAINT GOBAIN CERAMICS & PLASTICS INC