Vacuum Furnace Tungsten Heaters
In the construction of modern ultra-high temperature vacuum heat treatment furnaces, sapphire and silicon single crystal growth equipment (such as bubble generation or czochralski crystal furnaces), high temperature powder metallurgy sintering, and cutting-edge semiconductor vacuum equipment, the design of the core thermal field (Hot Zone) It directly determines the thermal efficiency, temperature field uniformity and equipment service life of the entire system. When the working temperature exceeds 1700 °C or even approaches 2400 °C, conventional molybdenum, tantalum or graphite bodies often face severe high-temperature evaporation, oxidative erosion or mechanical strength failure. As shown in the physical picture of the product, the high-purity precision tungsten body and vacuum furnace tungsten heating elements (High-Purity Tungsten Heating Elements/Vacuum Furnace Tungsten Heaters) we professionally present are designed to meet the extreme high temperature thermal field and achieve high efficiency and stability. Industrial-grade core heating components built for thermal radiation.
As the "king of melting points" among refractory metals, Tungsten (Tungsten) has an astonishing melting point of up to 3422 °C, extremely low high-temperature vapor pressure, excellent creep resistance, and excellent high-temperature conductivity and thermal conductivity. It shows unrivaled dominance in the vacuum. From the precision serpentine/labyrinth structure shown in the picture, it can be seen that the tungsten body adopts advanced laser cutting and precision mechanical molding technology to carve the high-purity tungsten plate into an optimized current loop path. This unique geometric design can not only achieve the absolute uniformity of the internal temperature field of the thermal field, but also effectively avoid the burning loss caused by local Hot Spots (Hot Spots), and greatly prolong the service life of the heating element. For European and American industrial buyers and thermal engineers who pursue extreme thermal efficiency and long-term fault-free operation, choosing high-purity tungsten means locking in a level of thermal energy conversion and heating guarantee for high-temperature vacuum systems.
In terms of manufacturing and control technology, we select high-quality powder metallurgy tungsten plates with high density and purity of not less than 99.95%, which are rolled in multiple passes, laser precision blanking, stress release annealing and ultrasonic deep pickling. The surface presents a pure metallic silver gray, and has an extremely low out-gassing rate in ultra-high vacuum (UHV) operation, completely eliminating the cross-contamination of volatile impurities on crystal growth or materials. In order to facilitate the project evaluation and specification matching between the global engineering and technical team and the purchasing manager, we have sorted out the core technical parameters of this series of tungsten bodies as follows:
Table of Core Parameters and Technical Specifications
| Property | Value | Advantages |
| Product Name | Tungsten Heating Element High Purity Tungsten Body/Vacuum Furnace Tungsten Heating Element | A heat-resistant radiant heating element designed for ultra-high temperature thermal fields at 1700 °C-2400 °C |
| Grade | W1 (Pure Tungsten, High-Purity Tungsten) | High purity, no harmful trace elements introduced, and excellent structural strength at extreme high temperatures |
| Purity | ≥ 99. 95% | The total impurity content is strictly controlled below 50 ppm, and the ultra-high vacuum cleanliness is extremely high |
| Density | 19.3 g/cm³ | Close to the theoretical limit density, the structure is dense, and the resistance to high temperature ablation and creep is extremely strong |
| Melting Point | 3422 ℃ (6192 ℉) | Melting point among all metals, establishing its unshakable position in extreme temperature regions |
| CTE | 4.5 × 10⁻⁶ / K (20–1000℃) | Extremely low thermal rate, excellent thermal shock resistance, and is not easy to deform and crack after repeated rapid cooling and rapid heating |
| Dimensions | OD/disc diameter: Ø 50 mm-Ø 800 mm; Thickness: 1.0 mm-8.0 mm | Support customized non-standard design according to CAD engineering drawings (STEP/DWG/PDF) |
| Processing | High purity tungsten plate precision laser/wire cutting > surface deburring > high vacuum stress relieving annealing structure | High precision no mechanical residual stress uniform current distribution no local overheating |
| Surface Finish | Chemical pickling clean surface, mechanical polishing surface (oil-free ultrasonic cleaning state) | Surface without oxide skin and oil stain, in line with vacuum furnace and semiconductor clean assembly standards |
| Standards | ASTM B760 (Tungsten Strip, Sheet, and Foil) | Fully complies with European, American and international refractory metal material manufacturing and control regulations |
| Working Temp | Under vacuum or high-purity inert/reduction protection: ≤ 2400 °C | Must be used in anaerobic protection or high vacuum, and it will oxidize when encountering trace oxygen at high temperature |
In-depth analysis of industry application and procurement value
In actual industrial and scientific research scenarios, tungsten bodies are widely used in a variety of extreme thermal equipment. Firstly in the Vacuum Sintering & Heat Treatment Furnaces they serve as the core heating elements to provide stable and reliable high-temperature radiation heat source for the sintering of cemented carbide ceramics and annealing of special metals. Secondly, in the field of semiconductors and single crystal growth (Crystal Growth Equipment), such as sapphire crystal growth furnaces and silicon carbide (SiC) sublimation growth systems, pure tungsten bodies can withstand harsh temperature gradients and will not release volatile impurities to crystals, ensuring high-purity growth of semiconductor materials.
We are well aware of the stringent requirements of overseas B2B purchasers for traceability and delivery safety. Each batch of tungsten body is accompanied by the original material inspection report (MTC) in compliance with EN 10204 3.1 standard, including detailed spectrochemical composition analysis and dimensional accuracy test data. In terms of packaging and shipping, we use high-density EPE pearl cotton for suspension and shock-proof fixing, and the outer layer is wrapped with vacuum moisture-proof film and packed into export-grade hard fumigation-free wooden boxes to ensure cross-border shipping is foolproof. Whether you are conducting scientific research proofing or large-scale industrial mass production procurement, we can provide you with efficient global logistics response and customized design services.
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