A vacuum tube furnace is a tubular device used for high-temperature heating of materials in a vacuum or inert gas environment. Its core principle is to use a vacuum pump to remove air from the furnace chamber to a set vacuum level (typically up to 10 Pa), or to fill it with inert gases (such as argon or nitrogen) to eliminate reactions between the material and gases like oxygen and water vapor, ensuring a pure environment for heating, sintering, and melting. The heating process relies on electric heating elements (such as resistance wire or silicon-molybdenum rods) to generate heat, which is transferred to the sample through conduction and convection. A precise temperature control system ensures precise control of process parameters.

Structural Components and Technical Features of Vacuum Tube Furnaces
Core Structural Components
Furnace: The furnace body features a double-layered shell design with a built-in fan for accelerated heating and cooling, resulting in a low surface temperature. Select models feature a reversible furnace chamber at 110°C for easy loading and unloading of materials.
Furnace Chamber Materials: Imported alumina polycrystalline fiber or high-quality alumina fiber is often used, offering excellent thermal insulation, up to 50% energy savings, and resistance to high temperatures and thermal shock. Heating System: Equipped with high-efficiency components such as Swedish Kanthal and HRE resistance wires, the heating rate is adjustable from 1 to 20°C/min, with a temperature uniformity of ±5°C.
Vacuum and Atmosphere Control: The furnace tube (corundum or quartz tube) is sealed with a SUS304 vacuum flange, achieving a vacuum of up to 10 Pa. The furnace supports the introduction of inert gases and mixed gases, and some models are equipped with multiple gas inlets and needle valve control.
Control System: Utilizing artificial intelligence control technology, it features PID control, 30-step programmable temperature ramping, a temperature display accuracy of ±1°C, and safety mechanisms such as over-temperature alarm and leakage protection.
Advantages of Multi-Station Design: Multi-station models allow independent temperature and time control for each station, meeting the needs of simultaneous processing of different materials, improving research and production efficiency, and are particularly suitable for comparative experiments in new material development.

Applications and Scenarios of Vacuum Tube Furnaces: Research and Materials: Materials Science: Used for the preparation of high-purity metals, alloys, ceramics, and nanomaterials, and for studying phase transition behavior and optimizing performance. Laboratory Research: Supports experiments such as CVD (chemical vapor deposition) and PECVD (plasma-enhanced chemical vapor deposition), providing a controllable heating platform for chemistry and physics.
Industrial Production
Metallurgical Engineering: Metal smelting, vacuum quenching, and annealing to reduce oxidation contamination and improve material purity.
Ceramics and Glass: Ceramic sintering and glass melting to increase product density and hardness.
Semiconductors and Optoelectronics: Fabrication of silicon and metal thin films and other coatings for integrated circuit and optoelectronic device production.
Energy and Environmental Protection: New Energy Materials: Preparation of solar cell and fuel cell materials.
Waste Disposal: High-temperature incineration and pyrolysis to achieve harmless waste disposal and resource recovery.