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US 2019/0206671 A1Published application
Infrared radiating element
AssigneeHeraeus Noblelight GmbH
InventorsHolger ZISSING, Michael HONIG, Lotta GAAB, Jürgen WEBER
Life of this patent
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Abstract
An infrared emitter that comprises a cladding tube made of quartz glass that surrounds a heating filament as an infrared radiation-emitting element that is connected via current feedthroughs to an electrical connector outside the cladding tube. To improve the service life and power density, the heating filament comprises a carrier plate with a surface made of an electrically insulating material, whereby the surface is covered by a printed conductor made of a material that generates heat when current flows through it.
Claims20
An infrared emitter comprising:
- a heating filament functioning as an infrared radiation-emitting element and including a carrier plate with a surface made of an electrically insulating material and a printed conductor covering the surface, the printed conductor being made of a material that generates heat when current flows through it;
- a cladding tube made of quartz class that surrounds the heating filament;
- and
- one or more current feedthroughs adapted to connect the heating filament to an electrical connector located outside the cladding tube.
1 more element
An infrared emitter comprising:
- a heating filament functioning as an infrared radiation-emitting element and including a carrier plate with a surface made of an electrically insulating material and a printed conductor covering the surface, the printed conductor being made of a material that generates heat when current flows through it and contains one or more elements from the group of tungsten (W), molybdenum (Mo), silicon carbide (SiC), molybdenum disilicide (MoSi2), chromium silicide (Cr3Si), aluminum (Al), tantalum (Ta), polysilicon (Si), copper (Cu), and high temperature-resistant steel;
- a cladding tube having a circumference and being made of quartz glass, the cladding tube surrounding the heating filament with a vacuum or a protective gas atmosphere that comprises one or more gases from the series of nitrogen, argon, xenon, krypton, or deuterium;
- a coating made of opaque highly reflective quartz glass, the coating covering partial areas of the circumference of the cladding tube;
- and
- one or more current feedthroughs adapted to connect the heating filament to an electrical connector located outside the cladding tube.
2 more elements
An infrared emitter comprising:
- a heating filament functioning as an infrared radiation-emitting element and including multiple carrier plates each with a surface made of an electrically insulating material and multiple printed conductors covering the surfaces of the carrier plates, which each can be electrically triggered individually, the printed conductors being made of a material that generates heat when current flows through it and contains one or more elements from the group of tungsten (W), molybdenum (Mo), silicon carbide (SiC), molybdenum disilicide (MoSi2), chromium silicide (Cr3Si), aluminum (Al), tantalum (Ta), polysilicon (Si), copper (Cu), and high temperature-resistant steel and the carrier plates are each formed by at least two layers of material, comprise a composite material that is formed by a matrix component and by an additional component in the form of a semiconductor material, or comprise a closed porosity of less than 0.5% and has a specific density of at least 2.19 g/cm3;
- a cladding tube having a circumference and being made of quartz glass, the cladding tube surrounding the heating filament with a vacuum or a protective gas atmosphere that comprises one or more gases from the series of nitrogen, argon, xenon, krypton, or deuterium;
- a coating made of opaque highly reflective quartz glass, the coating covering partial areas of the circumference of the cladding tube;
- and
- one or more current feedthroughs adapted to connect the heating filament to an electrical connector located outside the cladding tube.
2 more elements
Dependencies are inferred from the claim text.