All-ceramic heating element

Abstract

The present application relates to the technical field of electric heating elements, and discloses an all-ceramic heating element, which includes an outer heating layer, an inner insulating layer (3) and an inner heating layer, wherein the inner heating layer, the inner insulating layer (3) and the outer heating layer are sequentially arranged from inside to outside; the outer heating layer is electrically connected to the inner heating layer; and the weight ratio of ceramic materials of an outer resistive layer (4) and an inner resistive layer (2) is: silicon nitride:silicon carbide:aluminum oxide:yttrium oxide:lanthanum oxide:molybdenum disilicide=(500-700):(100-300):(40-80):(50-90):(0-30):(500-800), and the ratios thereof for the outer resistive layer (4) and the inner resistive layer (2) are different. The heating element has integrated heating and temperature-sensing functions, is not affected by an external environment, can realize reliable heating or ignition, and has a reliable service life.

Dependencies are inferred from the claim text.