2200°C Vacuum Tungsten Sintering Furnace | Precision Heat Treatment Equipment

Introduction

The ZYLAB Vacuum Tungsten Sintering Furnace is a high-performance vertical vacuum resistance furnace designed for sintering and annealing metal compounds, ceramics, and inorganic materials in a vacuum or controlled atmosphere. It is also suitable for the heat treatment of metal materials.

This batch-operated furnace features a bottom-loading structure, ensuring uniform heating and precise temperature control.

Key Features

• Single-Chamber Vertical Structure

  • Composed of a furnace body, lid, bottom, lifting mechanism, heating elements, vacuum system, temperature field, gas supply system, water cooling system, and electrical control system.

  • Dual-Layer Water-Cooled Furnace Body

    • Constructed with upper and lower welded stainless steel flanges in a cylindrical shape.

    • Inner wall: 304 stainless steel with fine polishing to ensure high vacuum levels.

    • Outer wall: 304 stainless steel with sandblasted treatment for durability.

    • Integrated water cooling system between the inner and outer layers for efficient heat dissipation.

    • O-ring vacuum sealing with fluororubber gaskets to maintain high vacuum levels, with water-cooled flanges preventing gasket aging due to high temperatures.

    • Features a side thermocouple for monitoring, an observation window, gas inlet, two electrode interfaces, and a vacuum exhaust port.

    • Water-Cooled Furnace Lid

      • Designed with dual-layer water cooling for both the large and small central furnace lids.

      • Inner wall: 304 stainless steel with fine polishing for optimal vacuum conditions.

      • Outer wall: 304 stainless steel welded with flanges, integrated with a water cooling system.

      • Large furnace lid: Bolt-locking structure with O-ring vacuum sealing to ensure vacuum integrity.

      • Equipped with a tungsten-rhenium thermocouple port, safety valve, and exhaust port.

      • The small furnace lid features a quick-release locking system for easy operation.

      • Furnace Bottom & Lifting Mechanism

        • Shares the same dual-layer water-cooled design as the furnace lid.

        • Features a sample platform on the small furnace bottom, supporting bottom-loading and unloading.

        • Lifting system is integrated with linear guide rails for smooth and stable movement.

        • Vacuum Acquisition & Measurement System

          • Equipped with a K-100 diffusion pump with a cold trap and a TRP-36 direct-coupled mechanical pump.

          • Includes vacuum pipelines, manual butterfly valves, vent valves, and vacuum pressure gauges for precise control.

          • Temperature Field & Heating System

            • Uses high-purity tungsten mesh as the heating element, vertically suspended inside the furnace.

            • Three tungsten electrodes extend perpendicularly from the tungsten mesh and connect externally via water-cooled copper electrodes to the transformer for power supply.

            1. Sintering & Processing of High-Performance Ceramics

            • Transparent Ceramics – High-purity ceramics such as transparent alumina (Al₂O₃) and magnesia (MgO).

            • Technical Ceramics – Used for dense sintering of high-purity oxides and advanced ceramic components.

            2. Tungsten & Refractory Metal Sintering

            • Tungsten (W) & Molybdenum (Mo) Products – Suitable for vacuum sintering of tungsten electrodes, molybdenum components, and high-density refractory metal parts.

            • Alloys & Composites – Suitable for high-density tungsten alloys and refractory metal composites.

            3. Vacuum Degassing & Brightening of Metals

            • Removes impurities, gas inclusions, and oxides, ensuring high-purity metal surfaces.

            • Used for electronic-grade tungsten, molybdenum, and specialty metal refining.

            4. High-Temperature Physical & Chemical Property Testing

            • Supports material research on phase transformations, thermal expansion, and mechanical properties.

            • Used in universities, research institutes, and material development laboratories.

            5. Vacuum Sintering & Annealing of Metal Compounds & Inorganic Materials

            • Enables precise thermal processing of metal-ceramic composites, carbide tools, and inorganic compounds.

            • Supports annealing treatments to enhance material properties under vacuum or inert gas atmospheres.

            Operational Precautions

            • Temperature Monitoring: Regularly check the furnace lid, body, bottom, and water-cooled electrodes. If they become too hot to touch, stop heating immediately and check the cooling water system.

            • Vacuum Maintenance: If the vacuum cannot be reached, inspect the diffusion pump oil for oxidation and the mechanical pump for aging; replace if necessary.

            • Gas Filling Precautions: Monitor the vacuum pressure gauge while filling gas. Avoid exceeding atmospheric pressure (keep at approximately -50Pa). Gas expands when heated, so if near positive pressure, use the mechanical pump to remove excess gas.

            • Material Loading: Avoid contact with the graphite heating element (especially the grooved sections), as it becomes fragile after high-temperature operation.

            • Cleaning & Maintenance: Regularly clean the interior and exterior of the furnace and maintain the vacuum valves to ensure optimal performance.

            • Cooling System Check: After starting the water pump, verify that all valves are fully open and that there are no leaks in the water pipes. Fix any issues immediately.