| 摘要 |
PURPOSE:To obtain a far infrared ray heater with excellent heat resistance and excellent adhesion at a high temperature by forming a far infrared ray radiation layer made of SiO2 film containing ZrO2.SiO2 of 1mum or less as a far infrared ray radiation material on the surface of a quartz tube or a crystallized glass tube. CONSTITUTION:A solution mainly made of silicone methoxide and containing ZrO2.SiO2 of 1mum or less and water are mixed with the preset ratio, and the mixture is coated on the surface of a quartz tube 1 by the spray method. It is then baked at 200 deg.C to form a far infrared ray radiation layer 2 mainly made of SiO2 and containing ZrO2.SiO2 as a far infrared ray radiation material on the surface of the quartz tube 1. An iron-chrome-aluminum wire 3 is wound in a coil shape, electricity extracting sections 4 are provided on both ends, it is inserted to the center of the quartz tube 1 formed with the radiation layer 2 to complete a far infrared ray heater. This far infrared ray heater has excellent heat resistance and excellent adhesion at a high temperature. |
