Doped Tungsten Heater
1.What Is Doped Tungsten Heater?
Doped tungsten heater is an evaporation source produced by introducing trace potassium (K) into a tungsten matrix. This process modifies the microcrystalline structure and, combined with wire drawing, twisting, and forming processes, significantly improves high-temperature stability. It effectively solves sagging and brittle fracture issues of conventional tungsten heaters, and is widely used in vacuum evaporation, coating, and high-temperature heating processes.
2.Features of CTIA’s Doped Tungsten Heater
(1) High-Temperature Shape Stability
Internal potassium bubble chains inhibit grain boundary sliding. During recrystallization, a columnar overlapping grain structure is formed, enabling the heater to maintain geometric stability above 2000°C.
(2) Delayed Thermal Embrittlement
The doped structure increases recrystallization temperature and slows grain growth, significantly delaying the ductile-to-brittle transition and improving resistance to repeated thermal cycling.
(3) Precise Thermal Field Control
Stable structural geometry eliminates thermal radiation deviation caused by sagging, ensuring consistent heater-to-substrate distance and high process reproducibility in mass production.
3.Applications of CTIA’s Doped Tungsten Heater
(1) Automotive Lighting Coating
Used as an evaporation source for uniform deposition of aluminum or chromium films on complex reflector geometries such as automotive lamp housings under vacuum conditions.
(2) Integrated Circuits
Used in Micro-Electro-Mechanical Systems (MEMS) metallization processes to form ultra-clean conductive films under ultra-high vacuum environments.
(3) Precision Optics and Display
Used for reflective films in Liquid Crystal Display (LCD) backlight modules and thermal insulation coatings in energy-efficient architectural glass, ensuring uniform optical performance across large-area substrates.
(4) Laboratory Precision Instruments
Used as a heating element in electron guns of Scanning Electron Microscopes (SEM) and ionization sources in mass spectrometers, meeting high-precision thermal control requirements in research equipment.
4.Specifications of CTIA’s Doped Tungsten Heater
The specifications of CTIA’s doped tungsten heater are as follows:
CTIA GROUP, with more than 30 years of experience in tungsten heater manufacturing, delivers advanced customization and precision engineering solutions. Based on application scenarios, vacuum conditions and installation space, CTIA systematically optimizes key parameters including wire diameter, doping type and content, structure type, overall length, bending angle, and support positions. Surface treatments such as electrolytic polishing or alkaline cleaning are also integrated, enabling full-process customized solutions from material selection, structural design to final manufacturing.
For any inquiry, please contact tungsten heater manufacturer: CTIA GROUP
Email: sales@chinatungsten.com
Tel: 0086 592 5129696 / 0086 592 5129595
Website: www.tungsten.com.cn
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