Vertical Dual-zone Vacuum Furnace

Description：

This vertical vacuum furnace features a dual-zone structure, designed to deliver precise and stable thermal processing for advanced materials applications.

Introduction

This vertical vacuum furnace features a dual-zone structure, designed to deliver precise and stable thermal processing for advanced materials applications. Its chamber is constructed from high-purity alumina polycrystalline fiber, ensuring excellent thermal insulation and minimal heat loss.

The upper heating zone is equipped with silicon carbide rods, supporting continuous, uninterrupted operation at temperatures up to 1200°C, while the lower zone uses resistance wire (with a quartz tube liner) for reliable heating up to 1100°C. The furnace is controlled via an intuitive touchscreen interface, which enables programmable control of descent stroke and speed, and integrates a 30-segment PID temperature control system for accuracy of ±1°C. A customizable temperature gradient (10–20°C) and adjustable slow descent speed (0.01–2 mm/h) make it ideal for crystal growth processes. It also offers crucible rotation (0–20 r/min) and mechanical vertical movement (0–30 cm/min) to meet diverse experimental requirements.

The system achieves an ultimate vacuum level of ≤10 Pa (under cold, empty, and purified conditions) using a rotary vane pump + roots pump combination, and can be purged with any inert gas via a dedicated inlet.

Applications

This vertical vacuum furnace is a versatile solution for high-temperature material research and production, including:

Crystal growth: Ideal for growing single crystals of semiconductors, oxides, and other functional materials, thanks to its precise temperature gradient and stable slow descent control.

Advanced materials sintering: Used for sintering ceramic materials, magnetic components, powder metallurgy parts, rare earth materials, and precious metal alloys in a controlled vacuum atmosphere.

Heat treatment: Suitable for annealing, brazing, and degassing of metals and alloys to enhance material properties and remove impurities.

Material analysis & testing: Supports thermal performance testing and phase analysis of new materials under high-temperature and vacuum conditions.

Technical parameters

project	Specifications
Structural type	Vertical dual-temperature zone structure
Effective furnace size	Inner diameter 90mm * height 850mm
Furnace material	alumina polycrystalline fiber
Upper heating zone heating element	silicon carbide rods
Upper heating zone operating temperature	1200℃
Lower temperature zone heating element	resistance wire
Lower temperature zone operating temperature	1100℃ and below
control Panel	The touchscreen control panel allows users to set and control the descent stroke and speed.
Temperature control system	It can set 30 temperature ranges and uses PID control to adjust the temperature, with a temperature control accuracy of ±1℃.
Crystal growth temperature gradient	Adjustable between 10℃ and 20℃
slow descent speed	0.01-2 mm/h (adjustable)
Slow descent	300mm
Crucible rotation speed	0-20r/min
Up and down movement speed of the mechanical system	0-30cm/min
heating rate	0-10℃/min
Ultimate vacuum	≤10Pa (empty furnace, cold state, purified)
Vacuum unit	Rotary vane pump + Roots pump unit
Vacuum gauge	Resistance vacuum gauge
Gas can pass through	The furnace body has a pre-installed air inlet, which can be used to pass any inert gas.