Three Temperature Zone High Temperature Vacuum Tube Furnace for CVD and Material Sintering

Product Overview

This high-performance three-temperature zone tube furnace is engineered to provide the ultimate in thermal processing flexibility for advanced material science research and industrial production. By utilizing three independently controlled heating sections, the equipment allows for the creation of a significantly longer and more stable isothermal zone or the establishment of precise temperature gradients required for complex chemical vapor deposition (CVD) and sublimation processes. The horizontal configuration, combined with a sophisticated double-shell housing, ensures that the external surface remains cool to the touch while maintaining internal temperatures of up to 1700°C in the central zone.

Designed for demanding laboratory and industrial environments, this system is a primary choice for universities, research institutes, and mining enterprises. It excels in high-temperature sintering, vacuum annealing, and controlled atmosphere experiments. The integration of high-purity polycrystalline alumina fiber insulation and advanced heating elements provides rapid heating and cooling rates, which significantly improves throughput and energy efficiency. This unit is built to deliver consistent, repeatable results, ensuring that critical research data and production batches meet the most stringent quality standards.

Reliability is at the core of this thermal processing system. Every component, from the stainless steel vacuum flanges to the precision PID controllers, is selected for long-term durability under continuous operation. The robust design handles vacuum levels down to 10-3 Pa and supports a variety of atmospheres, including reducing and inert gases. Whether performing routine heat treatments or complex material synthesis, this equipment provides the technical precision and structural integrity required for high-stakes research and development.

Key Features

• Independently Controlled Three-Zone Heating: The equipment features three separate heating sections that can be set to different temperatures. This allows users to compensate for heat loss at the tube ends, resulting in an ultra-wide constant temperature field or a customized thermal gradient for vapor transport applications.
• Advanced Dual-Element Configuration: To achieve optimal performance across a wide temperature range, the system utilizes high-quality Silicon Carbide (SiC) rods in the outer zones (Zones 1 and 3) and High-Purity Silicon Molybdenum (MoSi2) rods in the center zone (Zone 2), enabling stable operation up to 1700°C.
• Precision Software Control System: Equipped with a Japanese Shimaden FP93 programmable thermostat, the furnace offers 40 segments of temperature control. The integrated communication interface allows for real-time PC monitoring, data logging, and curve plotting, ensuring complete traceability of thermal cycles.
• High-Performance Vacuum Sealing: The furnace utilizes double-layer silicone O-ring technology and stainless steel flanges to maintain exceptional air tightness. The system is designed to hold vacuum pressure for over 12 hours without deflection, supporting sensitive processes at high vacuum levels.
• Superior Thermal Insulation: The chamber is lined with premium alumina polycrystalline fiber, which is known for its high reflectivity, low thermal mass, and resistance to shrinkage. This ensures a balanced temperature field and prevents powder shedding, maintaining the purity of the processing environment.
• Comprehensive Safety Protections: A built-in travel switch automatically cuts power when the furnace cover is opened. Additionally, the unit includes leakage protection, over-temperature alarms, and automatic circuit breaks to protect both the operator and the internal components.
• Robust Gas Handling: The system includes a standard float flowmeter for precise gas delivery. Users can upgrade to digital mass flow controllers (proton flowmeters) for automated and more accurate atmosphere management during CVD or reducing processes.
• Phase-Shift Triggered Thyristor Control: This advanced power regulation method ensures smooth power delivery to the heating elements, extending their lifespan and providing more stable temperature transitions compared to standard on/off switching.
• Structural Durability: The inclusion of specialized flange brackets eliminates mechanical stress on the corundum process tube caused by the weight of the vacuum hardware, significantly extending the life of the consumables.
• Versatile Flange Interfaces: The standard stainless steel flanges are equipped with ports for vacuum gauges, KF25 bellows, and gas valves, offering a modular approach to system configuration for different experimental needs.

Applications

Technical Specifications

Why Choose This Three-Zone Furnace

• Superior Thermal Uniformity: By allowing independent adjustment of three separate heating zones, this system compensates for natural heat dissipation at the tube ends, providing a significantly larger and more accurate isothermal processing area than single-zone alternatives.
• Precision Engineering and Build Quality: From the SEMIKRON thyristors to the Japanese Shimaden controllers, every critical electrical component is sourced from industry-leading manufacturers to ensure long-term operational reliability and precision.
• Integrated Safety and Monitoring: The combination of mechanical safety switches, electrical leakage protection, and real-time PC software monitoring creates a secure environment for high-temperature experimentation, reducing the risk of equipment failure or sample loss.
• Customizable Atmosphere and Vacuum Options: Whether your process requires a mechanical pump for routine vacuum or a German-imported molecular pump for high-purity environments, this system can be tailored with specific vacuum systems and gas flow controllers to meet your exact specifications.
• Enhanced Consumable Longevity: Our unique flange support bracket system prevents corundum tube damage by bearing the weight of the stainless steel sealing hardware, a common point of failure in lower-quality designs.

This equipment represents a premium investment in your facility's thermal processing capabilities, designed to withstand the rigors of industrial R&D while delivering unmatched precision. Contact our engineering team today for a formal quote or to discuss a customized configuration for your specific material science application.