A method for constructing infrared heating elements has the radiation conductor coated in an oxide of a lanthanumide metal
摘要
<p>The heating unit (1) has a quartz glass sealed tube (3) having molybdenum conductors (4) connected to a carbon strip or tungsten wire element (2a) which has a coating (2b) of an oxide of erbium, ytterbium, holmium or neodymium.</p>
